No edit summary
(18 intermediate revisions by 3 users not shown)
Line 1: Line 1:
{{Template:Practivistas Dominicana student projects header}}
[[File:LasMalvinas Destacamento finalwall1.jpg|thumb|upright=3|right|The destacamento in Las Malvinas as of July 1, 2014. Walls consist of traditional cement blocks as well as alternative coconut husk, newspaper, sawdust, and "Soviet" blocks.]]
{{TOCright}}
{{TOCright}}
==Abstract==
==Abstract==
The project to build a small descamaneto (police outpost) in the community of Las Malvinas was decided upon by members of the community as a priority for the Practivistas program to assist in during the months of May-July 2014. By working with the community to construct this descamento, the community of Las Malvinas, which is quite far from the urban center, and also quite impoverished, will be provided police officers by the government, and will hopefully increase community safety.
<center>''The project to build a small destacamento (police outpost) in the community of Las Malvinas was decided upon by members of the community as a priority for the Practivistas program to assist in during the months of May-July 2014. By working with the community to construct this destacamento, the community of Las Malvinas, which is far from the urban center and impoverished, will be provided police officers by the government, which will hopefully increase community safety.''</center>


==Background==
==Background==
The project to build a small descamaneto has been at minimum several years in the making in the community of Las Malvinas. It had been brought up by residents of the community prior to 2014, but other projects, such as the construction of a small pharmacy, had taken priority. In the months of May through July, 2014 the descamanto was on the list of projects to be started by members of the community and the Practivistas. During a community meeting, the criteria (which are displayed below) were formulated and the search began for a suitable spot to begin construction. This spot was found along a section of one of the main roads through town. This area provides a great deal of accessibility. As of right now the descamaneto will either be built out of an environmentally friendly fibercrete (also discussed below) or out of an up-cycled shipping container. The minimum goal for the project in 2014 is to build the foundation and the platform on which the rest of the descamento can be built. This goal was to be met by July 5, 2014.
The project to build a small destacamento has been at minimum several years in the making in the community of Las Malvinas. It had been brought up by residents of the community prior to 2014, but other projects, such as the construction of a small pharmacy, had taken priority. In the months of May through July, 2014 the destacamento was on the list of projects to be started by members of the community and the Practivistas. During a community meeting, the criteria (which are displayed below) were formulated and the search began for a suitable spot to begin construction. This spot was found along a section of one of the main roads through town. This area provides a great deal of accessibility. The destacamento will be built using some relatively environmentally friendly fibercrete blocks (also discussed below), but the idea of using an old shipping container was also evaluated. The minimum goal for the project in 2014 is to build the foundation and the platform on which the rest of the destacamento can be built. This goal was to be met by July 5, 2014.


==Objective==
==Objective==
The objective of this project is to construct a destacamento in Las Malvinas to provide security for the community.
The community of Las Malvinas is looking to decrease crime by constructing a destacamento. The objective of this project was to design and construct a destacamento using alternative blocks created by the block team. The block team created alternative cement blocks by using coconut husks, sawdust, rice ash, and newspaper mixed with cement.
 


===Criteria===
===Criteria===
Line 48: Line 52:


==Literature Review==
==Literature Review==
This is a review of the available literature pertinent to the 2014 Practivistas initiative to begin construction on a police station for the community of Las Malvinas in Santo Domingo. Topics will range from building materials to general information on construction.
See our [[Las Malvinas destacamento/Literature Review|Literature Review]] for relevant research completed for this project.
 
===The Community of Las Malvinas===
 
===Weather===
 
“The so-called 'cool' or winter season, runs from November to April. The humidity is relatively low during these months and it tends to cool down in the evenings much more than in the summer months. The coastal/beach regions [including Santo Domingo] generally experience highs of around 28°C (83°F) during the day and lows of about 20°C (68°F) in the evening...The summer season in the Dominican Republic runs from May to October. Average daily highs for the coastal/beach regions rise to around 31°C (87°F) during the day, dropping down to about 22°C (72°F) at night. It is the higher humidity during this period that can make it feel much hotter during this season” <ref>Embassy of the Dominican Republic in the United States. N.p., n.d. Web. 7 June 2014. <http://www.domrep.org/kids.html></ref>.
“The south has two main seasons: a dry winter and a rainy summer...In the Santo Domingo…watershed, rainfall shows primarily one longer rainy season in
summer and one dry season in winter. Although not statistically significant, it is worth noticing that, unlike stations in other areas, all three analyzed stations experienced an increase in precipitation during most months of the year….The analysis showed a tendency for fewer extreme rainfall events in Yaque del Norte watershed and
more extreme events in the Santo Domingo watershed, where the increase in frequency of heavy rainfall was significant in the coastal areas (Santo Domingo and Las Américas)...
During the period of 1960 to 2012, the Santo Domingo ONAMET station reported an average of 1,500 mm of rainfall per year with very high inter-annual variability. Santo Domingo receives the bulk of its annual rainfall between May and October, when monthly rainfall exceeds 150mm/month, with the peak between August and October with rainfall reaching 90 mm/month. During the driest months of the year, February and March, rainfall drops to 50mm/month” <ref name="torres">Torres, Ruben, et al. Dominican Republic Climate Change Vulnerability Assessment
    Report. Comp. Patricia Caffrey, Leif Kindberg, and Carter Stone. N.p.:
    n.p., 2013. US Aid from the American People. Web. 6 June 2014.
    <http://www.usaid.gov/sites/default/files/documents/1862/
    Dominican%20Republic%20Climate%20Change%20Vulnerability%20Assessment%20Report.pdf></ref>.
“Hurricanes in the Dominican Republic are important events in the country’s history, with devastating impacts due to the combined effects of high winds and heavy rainfall. They occur primarily during the months of August, September, and October; with greatest intensity in the southeast and southwest regions of the country. They form in the western part of tropical North Atlantic Ocean, where high SSTs and low pressure prevail and intensify as they travel westward over warm waters…” <ref name="torres"/>.
 
==='''Building Components'''===
 
====Building a foundation====
A foundation is a load bearing part of a building which has direct contact with the soil. Typically they begin below ground level, and are the starting point of a structure. When building a foundation one should considered the type of soil being built in, the potential vertical and horizontal load being placed upon it, the building sites topography, and its resistance to earthquakes.<ref name="cymind">http://c.ymcdn.com/sites/www.nibs.org/resource/resmgr/BSSC/FEMA232_Chapter3final.pdf</ref> Types of foundation will vary depending on the size and shape of the structure being built. When building on uneven slopped, or poor quality soil, a deep foundation should be built 3 or more feet below the soil. This foundation may also vary in depths throughout. When building on even ground and in higher quality soil, a shallower foundation can be built. <ref>http://www.wikihow.com/Build-a-Concrete-Foundation</ref> In the United States the minimum strength requirement for a residential concrete foundation is 2500 pounds per square inch (psi)<ref name="cymind"/>. Apparantly the building codes in Santo Domingo are the same as those in the United States <ref>http://hj.diva-portal.org/smash/get/diva2:232910/FULLTEXT01.pdf</ref> so this number could also be applied here since our structure is relatively small. Before excavating for a foundation, a survey must be taken to determine the depth etc. Once this is done the trenches can be dug, and footings can be poured, if need be. These are cement layers, which are meant to distribute the load of the foundation walls, which will be poured on top. Foundation walls can be made by pouring concrete in to forms, usually wooden. The forms should be spaced at least a few inches from the walls of the trenches. When the concrete drys the forms can be removed, and construction fill, typically made from aggregate soil can be filled in around the edged of the foundation trenches <ref>http://www.diynetwork.com/remodeling/basic-steps-of-building-a-foundation/index.html</ref>.
 
====Soil and Building====
When considering soil in terms of a building project, the four main properties of inorganic soil should be considered. These properties are: mineral matter, organic matter, water and air. Soil texture can be described as "the range of individual mineral particles such as sand silt and clay," which are present in soil <ref name="ext">http://www.extension.umn.edu/environment/housing-technology/moisture-management/evaluating-soil-texture-for-a-house-site/index.html</ref>. However for smaller projects, there doesn't have to be very extensive investigation of the soil <ref>http://www.fao.org/docrep/s1250e/S1250E0i.htm#Concrete foundations</ref>. Coarse textured soils (soils which are sandy or contain coarser aggregates) are better for building because water moves easily through them, and they are easy to dig in. Aside from this they have a higher load bearing capacity, and are less likely to sink under the weight of the structure than clay or silty soils <ref>http://buildingadvisor.com/buying-land/site-characteristics/slope-soils-water-vegetation</ref>. 55% of soils in the Dominican Republic have a shallow top layer, and are aggregated, so there is a strong possibility that the police station will be in soil suitable for building <ref>http://pdf.usaid.gov/pdf_docs/Pnadc949.pdf</ref>. Soils with a finer texture tend to expand and contract according to their moisture content, and this can damage foundations. <ref name="ext"/>.
 
====Retaining Walls====
 
A retaining wall is a structure which is created to hold back soil and earth<ref>http://junee.nsw.gov.au/index.php/planning-a-development/forms-a-documents/retaining-walls/346-what-is-a-retaining-wall.html</ref>. They are used as a means of leveling ground so one can build on slopes. <ref>http://en.wikipedia.org/wiki/Retaining_wall</ref>.
“New polymeric materials called geosynthetics can reinforce soil so retaining walls will not fail. “In the old technology, we asked the wall to hold the soil but now, with new technology, the soil is holding itself, even in the event of an earthquake,” said Dr. Ling. Dr. Ling’s work is supported by NSF and companies in North America, Germany, Israel and Japan” <ref>"Civil Engineering, Macro to Micro." Fu Foundation School of Engineering and Applied Sciences Engineering News (2006): n. pag. Web. 7 June 2014.<http://engineering.columbia.edu/web/newsletterarchive/fall06/feature3.php></ref>.
 
Small spacing GRS (geosynthetic reinforced soil) walls with a structural facing have an inverse relationship between the Initial GRS Composite Modulus (kN/m^2) and the Normalized Maximum Face Deflection (mm/m) with a relationship of y = 4E+13x-3.3262 and an R2 value of 0.9484 <ref>Holtz, Robert D., and Wei F. Lee. Internal Stability Analyses of Geosynthetic Reinforced Retaining Walls. N.p.: n.p., 2002. Washington State Department of Transportation. Web. 7 June 2014. <http://www.wsdot.wa.gov/research/reports/fullreports/532.1.pdf></ref>.
 
Retaining walls under 4 feet tall don’t need to be as strong as those above 4 feet, so if a taller wall is necessary step-terracing will keep cost and material usage low. In places that don’t get frost and have soil that drains well, topsoil can be scraped away to form a base for walls without mortar. To build a retaining wall, one should first lay down landscape fabric in the shape of a C with the open mouth facing downhill. This will keep sediment from clogging the gravel and drainpipe by separating the gravel and topsoil. Next, add at least a 4 inch layer of gravel onto the landscape fabric. Give this layer a slight slope to allow water to drain away, then insert a perforated PVC pipe and cover it with gravel to allow the soil behind the retaining wall to drain. The sediment behind the wall should be added gradually as the wall is built and tamped against the wall to prevent sliding and make the Normal force as direct as possible. The retaining wall should have a backwards tilt of 1 inch for every 12 inches of height. Timber walls above 4 feet should be tied to the hillside. Timber walls don’t last as long as ones built from mined materials, but they aren’t very hard to built. They cost about $10-$15 USD per square face foot. Concrete block retaining walls are mortar-free and easy to assemble. They can be up to 20 feet high and be easily shaped. They cost about $12-$20 USD per square face foot. Stone, brick, and cinder block walls are difficult to make. They cost $10-$12 USD for cinder blocks and $20-$25 USD for brick or stone. Concrete walls are strong and rarely fail but aren’t very aesthetic and cost $16-$20 USD per square face foot. Two kinds of failure for retaining walls are blowout failure and wet-soil failure. Blowout failure occurs when a load is added within 3 feet of the top of the wall. Wet-soil failure happens when soil behind the wall gets saturated, which causes hydrostatic water pressure and topples the wall. Wet-soil failure is the most likely kind of failure in Santo Domingo because of the large amount of rain. It is preventable if one has adequate gravel and a perforated drainpipe <ref>Wagner, John D. "Engineering a Retaining Wall." This Old House: n. pag. This Old House. Web. 7 June 2014. <http://www.thisoldhouse.com/toh/article/0,,219681,00.html></ref>.
 
A retaining wall will be more affordable if the top is thinner, but it is recommended to have a thickness of at least 2 feet at the top of every point in the wall to resist frost. However, frost is not much of a problem in Santo Domingo <ref>Merriman, Mansfield. A Text-book on Retaining Walls and Masonry Dams. New York:
    John Wiley & Sons, 1892. Google Books. Web. 7 June 2014.
    <https://archive.org/stream/atextbookonreta01merrgoog#page/n8/mode/2up></ref>.
 
===Requirements for a Police Station In Santo Domingo===
 
==='''Types of materials used'''===
 
====Concrete====
Concrete is essentially a mixture of aggregate and paste which is usually made from cement and water. Aggregate can be shale, clay gravel, air cooled slag, cinder, sand and many other things. <ref>http://books.google.com.do/books?id=TiwiGsfo5i4C&pg=PA189&lpg=PA189&dq=properties+of+concrete+blocks&source=bl&ots=1r1VacF6BV&sig=LE_lXJP1WTdFK2WMlczJ7VwvqHU&hl=en&sa=X&ei=1zGTU5mlOuLfsATgk4LQCw&ved=0CDMQ6AEwAw#v=onepage&q=properties%20of%20concrete%20blocks&f=false</ref>.Through a chemical process called hydration, the cement paste dries into the particularly hard mass known as cement. The key to getting high quality concrete is attaining the correct ratio between the ingredients. Typically cement will consist of 8% water, 80% aggregate, and 12% cement <ref>http://www.ce.berkeley.edu/~paulmont/CE60New/Concrete%20and%20the%20Environment.pdf</ref>. The lower the water-cement ratio, the higher quality the concrete will be. The trade of to this lies in in the work-ability of the concrete while wet. While a lower water-cement ratio will producer better concrete, it will be much harder to work with. <ref> http://www.cement.org/cement-concrete-basics/how-concrete-is-made</ref>. Concrete blocks are building units made with one or more hollow spots. Think of a cinder block. <ref>http://books.google.com.do/books?id=TiwiGsfo5i4C&pg=PA189&lpg=PA189&dq=properties+of+concrete+blocks&source=bl&ots=1r1VacF6BV&sig=LE_lXJP1WTdFK2WMlczJ7VwvqHU&hl=en&sa=X&ei=1zGTU5mlOuLfsATgk4LQCw&ved=0CDMQ6AEwAw#v=onepage&q=properties%20of%20concrete%20blocks&f=false</ref> For this project it is likely that we will be using concrete based blocks. One of the advantages of building with concrete is that is is fairly earthquake resistant and in the case of the Dominican Republic provides a solid defense against hurricanes and keeps buildings cool. Concrete is one of the most common building materials in Santo Domingo. <ref>http://hj.diva-portal.org/smash/get/diva2:232910/FULLTEXT01.pdf</ref> One of the other major advantages of concrete is that it is very available and can be sourced from almost anywhere in the world. It is also highly recyclable. <ref>http://www.sustainableconcrete.org.uk/concrete.aspx</ref>. One of the drawbacks to working with concrete is that it has a high embedded energy. Millions of tons of water is used in the process of making it and even more aggregate must be mined. On top of this, all these materials have to be shipped to various locations. Adding all of these things together, concrete is actually responsible for 5% of C02 emmissions globally <ref>http://www.ce.berkeley.edu/~paulmont/CE60New/Concrete%20and%20the%20Environment.pdf</ref>.
 
====Rebar====
Rebar is common steel used in the form of steel bars or a grouping of steel wires that are used to increase the tensile strength of concrete. Adding rebar, which has incredible tensile strength, to concrete, which has very high compression strength but low tensile strength, creates reinforced concrete <ref> http://www.newton.dep.anl.gov/askasci/eng99/eng99531.htm</ref>. The addition of rebar allows for the concrete to endure much heavier loads.
 
{| class="wikitable"
|+<small>Imperial sizes and bar traits of rebar<ref> http://www.jckgroup.net/rebar.html </ref>.</small>
! Imperial Bar Size
! Weight Per Unit length (lb/ft)
! Nominal Diameter (in)
!Nominal Area (in<sup>2</sup>)
|-
| #3
| 0.376
| 0.375
| 0.11
|-
| #4
| 0.668
| 0.500
| 0.20
|-
| #5
| 1.043
| 0.625
| 0.31
|-
| #6
| 1.502
| 0.750
| 0.44
|-
| #7
| 2.044
| 0.875
|0.60
|-
| #8
| 2.670
| 1.000
| 0.79
|-
|}
 
====Cement====
Cement is a substance used to bind various aggregates together. It sets independently and binds material together once it is hardened. “Cement refers to the commodities that are produced by burning mixtures of limestone and other minerals or additives at high temperature in a rotary kiln, followed by cooling, finish mixing, and grinding” <ref> http://www.epa.gov/osw/nonhaz/industrial/special/ckd/rtc/chap-2.pdf </ref>.
Cement can be categorized into two types: hydraulic or non-hydraulic. <ref> https://www.princeton.edu/~achaney/tmve/wiki100k/docs/Cement.html </ref>. Hydraulic cement contains hydraulic calcium silicates. It is able to set and harden under water while maintaining its structural integrity <ref> http://www.ce.berkeley.edu/~paulmont/165/cement.pdf </ref>.
The main chemical composition of cement consists of calcium oxide (lime), silicon dioxide (silica), aluminum oxide (alumina), iron oxide, water, and sulfate <ref>http://cescientist.com/chemical-composition-of-cement-and-functions-of-ingredients/ </ref>. One of the benefits of working with cement is that it is highly versatile. By altering one or more of the chemical components, the structure and form of the cement can vary greatly. The chemical makeup can be altered for a shorter hardening time, increased strength at early or late hardening stages, and increased durability <ref> http://books.google.com.do/books?id=1BOETtwi7mMC&lpg=PA1&ots=6Yr8NC4RzA&dq=cement%20chemistry&lr&pg=PA43#v=onepage&q&f=false </ref>. One of the disadvantages of cement is that the production requires a very large amount of energy. <ref> http://blogs.ei.columbia.edu/2012/05/09/emissions-from-the-cement-industry/ </ref>.
 
==='''Alternative Building Blocks'''===
====Rice Hull Concrete====
Rice hull concrete, referred to as HullKrete, is produced by the addition of rice hulls in a concrete mixture. HullKrete has been used before in Las Malvinas in the botica popular project. The mixture used contained rice hull, sand, gravel, cement, and a drying additive <ref>http://www.appropedia.org/Las_Malvinas_botica_popular_fiber-crete_2013</ref>.
 
====Paper Concrete====
Paper-crete involves the tearing of various paper materials, such as: newspaper, magazines, and junk mail. After the paper is shredded or torn, it is soaked in water and lime and then pulped. After being pulped the mixture is then dried until moist and then mixed and pressed into blocks. Paper-crete has been used in the construction of the schoolroom and ecolodrillo in Las Malvinas. The paper-crete blocks proved to be structurally sound while also being cheaper than traditional cement blocks <ref> http://www.appropedia.org/Las_Malvinas_botica_popular_hullkrete_2013 </ref> <ref> http://www.appropedia.org/Las_Malvinas_ecoladrillo_schoolroom_2012#Papercrete </ref>.
 
====Sawdust Concrete====
Sawdust concrete, or sawdust-crete, is another potential alternative to traditional concrete blocks. Sawdust-crete has several key features that differentiate it from traditional concrete. Sawdust-crete is much more sustainable than traditional concrete. It is both fireproof and frostproof, rot resistant, mold and fungi resistant, much lighter than traditional concrete, and has the ability to control interior humidity levels <ref> http://www.bmp.su/arbolit.html</ref> <ref>http://www.appropedia.org/Las_Malvinas_Botica_Popular_fiber-crete_2013/Literature_Review</ref>.
 
 
 


==Final Design==
==Final Design==
 
The final design was created with guidance from local police officers, community members, and traditional destacamento designs. The foundation was dug three feet deep all the way around and filled with rebar before being filled with concrete. The middle trench is used as support for the middle wall. The first room was designed to be bigger than the back room as it will serve as an entry and lobby for police officers stationed in Las Malvinas. The smaller back room will contain a holding cell as well as a bathroom.
 
{{Gallery
{{Gallery
|title=Sketchup of destacamento
|title=Sketchup of destacamento
|width=160
|width=320
|height=170
|height=170
|lines=4
|lines=4
Line 167: Line 67:
}}
}}


===Budget Table===
===Budget===
{| class="wikitable sortable"
This is the cost of materials for the foundation of the destacamento and the first layers of blocks for the walls. Prices are listed in Dominican Pesos.
! Quantity !! Material !! Source !! Cost (RD$) !! Total ($)
 
{| class="wikitable"
!Material
!Quantity
!Unit price (RD$)
!Total (RD$)
|-
|Rebar
|30 bars (20ft each)
|280
|8,400
|-
|Cement bags
|25
|280
|7,000
|-
|Gravel
|10m<sup>3</sup>
|200
|2,000
|-
|Sand
|10m<sup>3</sup>
|280
|2,800
|-
|-
| 21 bags || Cement Bag || The Thing Store
|Traditional cement blocks
|align="right"| 280
|315
|align="right"| 6.60
|16
|-
|5,040
| 35 bags || Rice Hulls || The OT Store
|align="right"| 200
|align="right"| 240.00
|-
|-
| 20 || Rebar || The Thing Store
|align="right"| 280
|align="right"| 6.60
|-
| 50 wheel barrows || Gravel || The OT Store
|align="right"| 200
|align="right"| 240.00
|-
| 4 pairs || Gloves || The OT Store
|align="right"| 164
|align="right"| 6.00
|-
| 1 gallon || Secante || The OT Store
|align="right"| 400
|align="right"| 9.75
|-class="sortbottom"
|-class="sortbottom"
|colspan="4" align="right" | '''Total Cost'''
!colspan="3" align=right|Total Cost
|align="right"| '''$246.60'''
!$25,240.00
|}
|}
{{-}}
===Timeline===
===Timeline===
Here is a timeline of events associated with the research, design, and construction of the Las Malvinas destacamento.
{| class="wikitable"
{| class="wikitable"
|+<small>.</small>
|+<small>.</small>
Line 263: Line 173:
|}
|}


 
==Construction==
{{How to
{{How to
  |title= Constructing a destacamento
  |title= Constructing a destacamento
Line 327: Line 237:


{{Gallery
{{Gallery
|title=First day of work on destacamento foundation
|title=Construction of Las Malvinas destacamento
|width=160
|width=160
|height=170
|height=170
Line 336: Line 246:
|File:LasMalvinas destacamento big rock unearthing.jpg|Team effort to remove large slab.
|File:LasMalvinas destacamento big rock unearthing.jpg|Team effort to remove large slab.
|File:LasMalvinas destacamento potentially illegal police station.jpg|Work cut short due to land dispute. Accusations of illegal police station.
|File:LasMalvinas destacamento potentially illegal police station.jpg|Work cut short due to land dispute. Accusations of illegal police station.
}}
|File:LasMalvinas destacamento communityslabbreaker.jpg|Community assisting with the breaking of large cement slab.
 
|File:LasMalvinas destacamento communityslabbreaker2.jpg|Community assisting with the breaking of large cement slab.
{{Gallery
|title=Second full day of work on destacamento foundation
|width=160
|height=170
|lines=4
|align=center
|File:LasMalvinas destacamento backtrench trash.jpg|Digging to desired depth. Back trench contained a large amount of trash.
|File:LasMalvinas destacamento backtrench trash.jpg|Digging to desired depth. Back trench contained a large amount of trash.
|File:LasMalvinas destacamento diggingtrash,jpg.jpeg|A lot of trash.
|File:LasMalvinas destacamento thor cemento.jpg|Thor helps us by smashing large cement slab.
|File:LasMalvinas destacamento thor cemento.jpg|Thor helps us by smashing large cement slab.
|File:LasMalvinas destacamento thoraftermath.jpg|Aftermath of Thor's hammering.
|File:LasMalvinas destacamento community help.jpg|Community members help us dig out the trenches.
|File:LasMalvinas destacamento community help.jpg|Community members help us dig out the trenches.
|File:LasMalvinas destacamento fronttrench complete.jpg|Front trench dug to desired depth.
|File:LasMalvinas destacamento fronttrench complete.jpg|Front trench dug to desired depth.
|File:LasMalvinas destacamento cementslab removed.jpg|Very large cement slab chipped away to dig to desired depth.
|File:LasMalvinas destacamento cementslab removed.jpg|Very large cement slab chipped away to dig to desired depth.
|File:LasMalvinas destacamento middletrench begin.jpg|Starting to dig the middle trench.
|File:LasMalvinas destacamento middletrench begin.jpg|Starting to dig the middle trench.
|File:LasMalvinas destacamento reartrenchcomplete.jpg|Rear trench dug to desired depth.
|File:LasMalvinas destacamento bobslabbreaking.jpg|Large cement slab being chipped away.
|File:LasMalvinas destacamento diggingcomplete.jpg|All trenches dug to desired depth. Ready for rebar.
|File:LasMalvinas Destacamento allrebartied.jpg|All rebar for foundation tied and ready to be installed.
|File:LasMalvinas destacamento rebartransportation.jpg|All rebar for foundation transported to destacamento site.
|File:LasMalvinas destacamento rebarshoving.jpg|Installing rebar into foundation.
|File:LasMalvinas destacamento rebarresizing.jpg|Rebar being resized in foundation.
|File:LasMalvinas destacamento rebarresizing2.jpg|Retying rebar in foundation to tie to other columns.
|file:LasMalvinas destacamento blockscement.jpg|Mixing concrete for foundation base.
|file:LasMalvinas destacamento Mixingalotofcement.jpg|Mixing a lot of concrete for foundation base.
|file:LasMalvinas destacamento concretepoured.jpg|Concrete being poured intro trenches onto rebar.
|file:LasMalvinas destacamento blocklayingmaestro.jpg|Maestro Gregory teaching how to lay blocks.
|file:LasMalvinas destacamento blocklayingmaestro1.jpg|Laying the first row of blocks on the front trench.
|file:LasMalvinas destacamento blocklayingmaestro2.jpg|Maestro Eddie assisting Bob.
|file:LasMalvinas destacamento layingblockswithjose.jpg|Laying blocks with Jose's help on the side trench.
|file:LasMalvinas destacamento bobnoelayingblocks.jpg|Laying blocks alongside community members.
|file:LasMalvinas destacamento patchworkalternativeblocks.jpg|All blocks laid. Patchwork of alternative blocks can be seen.
|file:LasMalvinas destacamento destacamentoteamandnoe.jpg|Block team with Noe in front of destacamento.
}}
}}
==Team==
[[File:LasMalvinas destacamento blockgroup groupshot.jpg|thumb|upright=4|center|The destacamento team with honorary members Jason and Anthony. Left to right: [[User:Nam78|Noe Martinez]], [[User:Jpm499|Jason McMack]], [[User:Rlw105|Robert Woodke]], [[User:Evb47|Eric Bloom]],[[User:Syamas|Sophia Yamas]], [[User:Anthonyhsu|Anthony Avila]]]]


==References==
==References==
{{Reflist}}
{{Reflist}}
See [[Las Malvinas destacamento/Literature Review|Literature Review]]


[[Category:Practivistas_Dominicana_Program]]
[[Category:Practivistas_Dominicana_Program]]

Revision as of 19:52, 23 September 2014

The destacamento in Las Malvinas as of July 1, 2014. Walls consist of traditional cement blocks as well as alternative coconut husk, newspaper, sawdust, and "Soviet" blocks.

Abstract

The project to build a small destacamento (police outpost) in the community of Las Malvinas was decided upon by members of the community as a priority for the Practivistas program to assist in during the months of May-July 2014. By working with the community to construct this destacamento, the community of Las Malvinas, which is far from the urban center and impoverished, will be provided police officers by the government, which will hopefully increase community safety.

Background

The project to build a small destacamento has been at minimum several years in the making in the community of Las Malvinas. It had been brought up by residents of the community prior to 2014, but other projects, such as the construction of a small pharmacy, had taken priority. In the months of May through July, 2014 the destacamento was on the list of projects to be started by members of the community and the Practivistas. During a community meeting, the criteria (which are displayed below) were formulated and the search began for a suitable spot to begin construction. This spot was found along a section of one of the main roads through town. This area provides a great deal of accessibility. The destacamento will be built using some relatively environmentally friendly fibercrete blocks (also discussed below), but the idea of using an old shipping container was also evaluated. The minimum goal for the project in 2014 is to build the foundation and the platform on which the rest of the destacamento can be built. This goal was to be met by July 5, 2014.

Objective

The community of Las Malvinas is looking to decrease crime by constructing a destacamento. The objective of this project was to design and construct a destacamento using alternative blocks created by the block team. The block team created alternative cement blocks by using coconut husks, sawdust, rice ash, and newspaper mixed with cement.


Criteria

This section includes the aspects that the group and community members decided to use for the project. The criteria and constraints were chosen based on how the project will be planned and evaluated. The criteria and weight ranking help determine how much effort will be invested for each different aspect.

Criteria Constraints Weight (0-10)
Aesthetics Must be aesthetically pleasing 8
Comfort Structure is able to withstand high temperatures without becoming excessively hot 9
Economical Must be within program budget range 4
Replicable Community members must be able to replicate design 7
Durable Must be long lasting and able to withstand potential natural disasters 10
Security Must be secure from potential burglary 8
Sustainable Materials used are environmentally friendly and sustainable 10

Literature Review

See our Literature Review for relevant research completed for this project.

Final Design

The final design was created with guidance from local police officers, community members, and traditional destacamento designs. The foundation was dug three feet deep all the way around and filled with rebar before being filled with concrete. The middle trench is used as support for the middle wall. The first room was designed to be bigger than the back room as it will serve as an entry and lobby for police officers stationed in Las Malvinas. The smaller back room will contain a holding cell as well as a bathroom.

Budget

This is the cost of materials for the foundation of the destacamento and the first layers of blocks for the walls. Prices are listed in Dominican Pesos.

Material Quantity Unit price (RD$) Total (RD$)
Rebar 30 bars (20ft each) 280 8,400
Cement bags 25 280 7,000
Gravel 10m3 200 2,000
Sand 10m3 280 2,800
Traditional cement blocks 315 16 5,040
Total Cost $25,240.00

Timeline

Here is a timeline of events associated with the research, design, and construction of the Las Malvinas destacamento.

.
Task Date Proposed Date Completed
Complete literature review 06/06/14 06/07/14
Establish site location 06/06/14 06/13/14
Start digging foundation 06/06/14 06/14/14
Design destacamento 06/13/14 06/15/14
Finish budget 06/13/14 06/15/14
Locate supplies 06/13/14 06/15/14
Purchase supplies 06/15/14 06/20/14
Finish digging foundation 06/20/14 06/20/14
Level ground 06/20/14 06/21/14
Finish tying rebar 06/22/14 06/24/14
Pour concrete for foundation 06/21/14 06/24/14
Lay brick 06/22/14 07/01/14
Finish foundation 06/23/14 07/01/14
Lay bricks for walls 06/25/14 07/01/14

Construction

Constructing a destacamento

Team

The destacamento team with honorary members Jason and Anthony. Left to right: Noe Martinez, Jason McMack, Robert Woodke, Eric Bloom,Sophia Yamas, Anthony Avila

References

Template:Reflist See Literature Review

Cookies help us deliver our services. By using our services, you agree to our use of cookies.