scholarly journals Sustainable construction for affordable housing program in Kabul

2021 ◽  
Vol 6 (1) ◽  
pp. 23-35
Author(s):  
Mohammadullah Hakim Ebrahimi ◽  
Philippe Devillers ◽  
Eric Garcia-Diaz
Keyword(s):  
Affordable Housing ◽  
Cost Effective ◽  
Sustainable Construction ◽  
Housing Program ◽  
Earth Construction ◽  
Industrial Modernity ◽  
Earthen Architecture ◽  
Earth Block ◽  
Local Materials ◽  
Modern Technologies

Afghanistan suffers from four decades of war, caused a massive migration of the rural population to the cities. Kabul was originally designed for 1,5 million people, where now 5 million people live. The importation of modern western styles housing for rapid reconstruction reveals apparent cultural conflict and significant environmental footprint. The new constructive cultures for sustainable reconstruction should necessary consider the use of local materials combined with modern technologies. Earthen architecture underlies the embodiment of Afghanistan architecture. The aim of this research is to revisit traditional afghan earthen construction with the tools of industrial modernity. Three soils of the Kabul region were first characterized. Then, sun-dried mud brick and compressive earth block, with and without stabilization have been prepared and tested in the laboratory to develop the most suitable earth construction element which is cost effective and easily available compared to the imported modern products.

SUSTAINABLE CONSTRUCTION PRACTICES FOR AFFORDABLE HOUSING

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Deepa G. Nair
Keyword(s):  
Affordable Housing ◽  
Building Materials ◽  
Cost Effective ◽  
The State ◽  
Sustainable Construction ◽  
Environment Friendly ◽  
Effective Utilization ◽  
Alternative Technologies ◽  
Technological Practice ◽  
Technological Options

Affordable housing has become a dream to millions in the world today. Depletion of natural resources together with the increasing price of building materials has aggravated this issue. Sustainable construction is a technological practice that involves the effective utilization of local man power and locally available renewable resources in construction with the help of minimum infrastructure. Alternative technologies which eliminate or rather minimize the utilization energy intensive materials such as concrete, cement and steel form an identity of sustainable construction. Cost Effective and Environment Friendly (CEEF) technological options practicing in the state of Kerala, India is also considered as a sustainable construction practice focusing on affordable housing solutions in the State. This paper presents an overview of CEEF technologies and checks the sustainability of these technological options in the context of Kerala.

Affordable housing: Cost effective construction materials for economically weaker section

2021 ◽  
Author(s):  
M. Arun ◽  
K. Baskar ◽  
B.S. Geethapriya ◽  
M. Jayabarathi ◽  
R. Angayarkkani
Keyword(s):  
Affordable Housing ◽  
Construction Materials ◽  
Cost Effective ◽  
Housing Cost

A Social-Return-On-Investment Analysis Of Bon Secours Hospital’s ‘Housing For Health’ Affordable Housing Program

2021 ◽  
Vol 40 (3) ◽  
pp. 513-520
Author(s):  
Emmanuel Fulgence Drabo ◽  
Grace Eckel ◽  
Samuel L. Ross ◽  
Michael Brozic ◽  
Chanie G. Carlton ◽  
...  
Keyword(s):  
Affordable Housing ◽  
Return On Investment ◽  
Investment Analysis ◽  
Housing Program ◽  
Social Return On Investment

Experimental evaluation on engineering properties and microstructure of the high-performance fiber-reinforced mortar with low polypropylene fiber content

2021 ◽  
Vol 72 (7) ◽  
pp. 824-840
Author(s):  
Hung Vu Viet ◽  
Cuong Nguyen Tuan ◽  
Duy Nguyen Huu ◽  
Tho Ngo Nguyen Ngoc ◽  
Phuoc Huynh Trong
Keyword(s):  
High Performance ◽  
Polypropylene Fiber ◽  
Cost Effective ◽  
Fiber Content ◽  
Engineering Properties ◽  
Fiber Reinforced ◽  
Cement Mortars ◽  
High Performance Fiber ◽  
New Construction ◽  
Local Materials

Recently, high-performance fiber-reinforced mortar/concrete (HPFRM) has been researched and developed in many fields such as repair, maintenance, and new construction of infrastructure works due to its high strain capacity and tight crack width characteristics. Optimizing the design of mixture proportions and structures using HPFRM is still a complex mechanical and physical process, depending on the design principles, specific site conditions, and their local materials. This study aims to develop an HPFRM with low polypropylene fiber content by using locally available ingredients in Southern Vietnam to address the deficiencies commonly observed in traditional cement grout mortars. Three mixture proportions were prepared with different water-to-binder (w/b) ratios of 0.2, 0.25, and 0.3. Then, the performance of HPFRM was evaluated in both fresh and hardened stages. Additionally, the microstructural characteristics of each mix design were also assessed through scanning electron microscope observation. The experimental results showed that the optimum w/b of 0.25 and a fixed dosage of 0.6% polypropylene fiber produced positive impacts on the rheological, mechanical properties, and also ductility of the high-performance mortar. It was concluded that HPFRMs are promising for cost-effective and sustainable cement mortars.

scholarly journals Aportes para el análisis comparativo del comportamiento higrotérmico y mecánico de los materiales de construcción con tierra

2019 ◽  
Vol 22 (1) ◽  
Author(s):  
María Guadalupe Cuitiño-Rosales ◽  
Rodolfo Rotondaro ◽  
Alfredo Esteves
Keyword(s):  
Building Materials ◽  
Thermal Characteristics ◽  
Mechanical Resistance ◽  
Secondary Sources ◽  
Earth Construction ◽  
Palabras Clave ◽  
Concrete Blocks ◽  
Vernacular Building ◽  
Natural Building ◽  
Earth Block

Resumen Se analizan las características térmicas y de resistencias mecánicas de materiales y elementos constructivos elaborados con suelos naturales estabilizados. La metodología parte de la recopilación bibliográfica de fuentes primarias, secundarias e información de ensayos propios, sobre la densidad, la conductividad térmica y las resistencias a la compresión, a la flexión y al corte correspondientes al adobe, los bloques de tierra comprimida (BTC), la tapia y la quincha, según diferentes autores. Además, se consideraron los valores establecidos por normas argentinas IRAM referidas al acondicionamiento térmico de edificios. Se elaboraron comparaciones entre sí y con algunos materiales industrializados, tales como los bloques de hormigón, los ladrillos cerámicos huecos y los ladrillos cocidos macizos. A partir de este análisis, se concluyó que la revisión bibliográfica no es suficiente para obtener una estandarización de los valores de conductividad y transmitancia térmica de los materiales y los elementos constructivos naturales. Así mismo, a partir de las comparaciones de valores se pudo observar cómo se relacionan la densidad de los materiales y la de los morteros, según las distintas técnicas, con el comportamiento térmico y las resistencias mecánicas. Palabras clave: Adobe; arquitectura sostenible; bahareque; bloque de tierra comprimida-BTC; materiales vernáculos de construcción; propiedades térmicas; quincha; resistencia mecánica; tapial   Comparative analysis of the thermal aspects and mechanical resistances for materials and elements of earth construction Abstract The thermal characteristics and mechanical resistance of some materials and constructive elements elaborated with stabilized natural soils are analyzed. The methodology took into account the bibliographic compilation of primary and secondary sources and information from own tests, on density, thermal conductivity and resistance to compression, flexion and cutting, corresponding to adobe, BTC, tapia and wattle and daub, according to different authors. In addition, it was considered the values established by Argentine standards IRAM referring to the thermal conditioning of buildings. Comparisons were made with each other and with some industrialized materials such as concrete blocks, hollow ceramic bricks, and solid fired bricks. From this analysis, it was concluded that the literature review is not enough to obtain a standardization conductivity and thermal transmittance values of natural building materials and elements. Furthermore, from the comparisons of values it was possible to observe how the density of materials and mortars, according to the different techniques, are related to thermal behavior and mechanical resistance. Keywords: Adobe; sustainable architecture; bahareque; compressed earth block (BTC); vernacular building materials; thermal properties; quincha; mechanical strength; tapial; wattle; daub   Recibido: octubre 22 / 2018  Evaluado: septiembre 10 / 2019  Aceptado: octubre 15 / 2019 Publicado en línea: noviembre de 2019                               Actualizado: noviembre de 2019

Chongqing

2017 ◽  
Author(s):  
Gavin Shatkin
Keyword(s):  
Urban Development ◽  
Affordable Housing ◽  
Land Development ◽  
Market Value ◽  
Social Engineering ◽  
Infrastructure Development ◽  
Housing Program ◽  
The Social ◽  
Gain Access ◽  
China’S Cities

Chongqing has witnessed an extraordinary experiment in urban development intended to deploy land-based finance as a tool to overcome the social and ecological problems that have increasingly beset China’s cities. This experiment included the use of land-based financing to undertake a public housing program that added a remarkable 800,000 units of affordable housing between 2011 and 2015. It also included efforts to accelerate urbanization through reforms to the household registration, or hukou system, and efforts to give farmers greater ability to gain access to the market value of their land. This chapter places the Chongqing experience in the context of China’s state capitalist model of urban development, which is premised on the state’s ownership of all urban land. This model has allowed the state to use commercial land development by state-owned enterprises as a powerful tool for economic growth, infrastructure development, and social engineering.

Compressed earth block reinforced with coconut fibers and stabilized with aloe vera and lime

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Alan Adiel Velasco-Aquino ◽  
Jose Adan Espuna-Mujica ◽  
Josue Francisco Perez-Sanchez ◽  
Carlos Zuñiga-Leal ◽  
Arturo Palacio-Perez ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aloe Vera ◽  
Attractive Alternative ◽  
Compression Tests ◽  
Construction Technique ◽  
Content Type ◽  
Earth Construction ◽  
Self Production ◽  
Earth Block ◽  
Coconut Fibers

Purpose In recent years, the use of earth as a material applied to construction has been adapted as an attractive alternative to modern concepts. The earth construction technique takes advantage of regional natural resources, among which are earth bricks. The purpose of this paper is to analyze the effect of the addition of coconut fibers and aloe vera on the mechanical properties of compressed earth blocks (CEB). Design/methodology/approach CEBs were manufactured from silty and clay soil (Altamira, Tamaulipas, Mexico) with biodegradable stabilizers of aloe vera and short coconut mesocarp fibers, which were compared with the conventional mixture with lime as stabilizer. The samples were subjected to compression tests (Mexican Standard NMX-C-404-ONNCC3-205), flexion (NMX-C083-ONNCCE.), abrasion (NTC-5324 3.4.3), water absorption (NMX-C-37-ONNCE-205), surface morphology and thermal properties (ASTM D5334-14). Findings It was found that the addition of coconut fibers has a 12% difference in flexural strength. The addition of 0.5% of coconut fibers decreases swelling by 2% with water and reduces the thermal conductivity of the material by 12%. Likewise, this mixture increases the abrasion resistance of CEB by 30%. When there is a pressure greater than 1,700 psi in the CEB, the addition of coconut fibers does increase the compressive strength of the material, showing a 34% improvement over the CEB without adding coconut fibers. Originality/value The authors show a new sustainable CEB production with aloe vera and coconut fiber that is possible for self-production with better mechanical properties than others, commonly produced in Mexico.

Public Housing and Vouchers

2013 ◽  
Author(s):  
Alex Schwartz
Keyword(s):  
Public Housing ◽  
Affordable Housing ◽  
Low Income ◽  
The United States ◽  
Housing Subsidy ◽  
Housing Program ◽  
Design Evolution ◽  
Advantages And Disadvantages ◽  
Privately Owned ◽  
Low Income Households

Public housing and rental vouchers constitute two distinct forms of housing subsidy in the United States. Public housing, the nation’s oldest housing program for low-income renters provides affordable housing to about 1.2 million households in developments ranging in size from a single unit to multibuilding complexes with hundreds of apartments. The Housing Choice Voucher Program, founded more than 35 years after the start of public housing is now the nation’s largest rental subsidy program. It enables around 2 million low-income households to rent privately owned housing anywhere in the country. Although both programs provide low-income households with “deep” subsidies that ensure they spend no more than 30 percent of their adjusted income on rent, and both are operated by local public housing authorities, they offer distinct advantages and disadvantages. This chapter reviews and compares the two programs, examining their design, evolution, and strengths and weaknesses, including issues of racial segregation and concentrated poverty.

Sign in / Sign up

Export Citation Format

Share Document