American Society of Civil Engineers


Physical, Mechanical, and Thermal Performance of Cement-Stabilized Rammed Earth–Rice Husk Ash Walls


by Ana Paula da Silva Milani, (corresponding author), (Assistant Professor, Center of Exact Sciences and Technologies, Federal Univ. of Mato Grosso do Sul, Campo Grande, Brazil E-mail: ana.milani@ufms.br) and Lucila Chebel Labaki, (Professor, College of Civil Engineering, Architecture and Urbanism, State Univ. of Campinas, Brazil E-mail: lucila@fec.unicamp.br)

Journal of Materials in Civil Engineering, Vol. 24, No. 6, June 2012, pp. 775-782, (doi:  http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0000439)

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Document type: Case Studies
Abstract: It is a well-known fact that waste products are available in large quantities within industries where they are generated. Therefore, this study investigates the incorporation of the agricultural and industrial residue of rice husk ash into the cement-stabilized rammed earth system to recover the use of raw land as a sustainable construction material and provide low pozzolanicity content rice husk ash with a suitable end purpose. The best-suited mixture to meet the normal masonry requirements was selected for the construction of a prototype building, which underwent technical assessment of its structural and thermal performance and of the durability of its cement-stabilized rammed earth-rice husk ash walls. The results showed that sandy soil, when partially replaced by the maximum ash content of 7.5% and stabilized with 10% cement, proved to be a promising alternative material. It proved to be a high-quality construction material that can be used to build energy-efficient houses and considered in the issue of social and environmental sustainability.


ASCE Subject Headings:
Vegetation
Compressive strength
Elasticity
Thermal factors
Ashes
Cement
Walls
Mechanical properties

Author Keywords:
Vegetable wastes
Compressive strength
Elastic modulus
Thermal conductivity
Specific heat