IMPROVEMENT OF THERMAL INSULATING PROPERTIES AND POROSITY OF FIRED CLAY BRICKS WITH ADDITION OF AGRICULTURAL WASTES
Keywords:
Porosity, thermal conductivity, agricultural wastes, clay brick, compressive strengthAbstract
This paper studies fired clay bricks mixed with different agricultural wastes such as grass(GA), coconut husk (CH), and sugarcane bagasse (SB) as porous additives in brick production. The agricultural wastes were added to the clay mixture in the compositions of0, 2.5, 5, and 7.5 wt%. Mixed clay bricks were fired at 1000oC for 1 h and were then studied for their physical and mechanical properties. The pore shapes of the fired bricks were examined by SEM micrograph. The porosity was linearly generated with a higher waste content. An increase of the porosity was significantly related to an increasing shrinkage and water absorption, while the bulk density was decreased. The compressive strength value of the fired clay bricks tended to decrease according to the percentage of agricultural waste included in the mixture. From the physical properties’ results, the thermal conductivity varied from 0.45 W/m K to 0.21 W/m K depending on the GA, CH, and SBcontents (2.5-7.5%). Conclusively, the results revealed that the agricultural wastes could be used advantageously in the improvement of the thermal insulation properties and low dead load in building materials.
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