ບົດຄັດຫຍໍ້
Interlocking clay brick is one of the construction material that initially used in Laos due to it is fast to build and save cost by overall. In this study, interlocking bricks are made by mixing soil with sand, cement and fly ash from Hongsa Power Plantin the ratio of powderto soil is 1:6. The replacement percentage of fly ash to cement in the powder is 0%,10%,20%, and 30% by weight under the curing conditions in the room temperature. The engineering properties of brick, water absorption, density, and compressive strength were tested afterage of28-days. As the results, it was found that the properties of interlocking bricks that mixes with fly ash, compressive strength, density and water absorption are compliance with the standardof the interlock bricks. The compressive strength of brick at 28 days for the replacement ratio of fly ash to cement of0%, 10%, 20%, 30% are 6.0 MPa, 5.4 MPa, 5.0 MPa, 5.0 MPa respectively. In the same ratio, the test results of density of brick are 1,067, 1,670, 1,620, 1,600 kg/m3 respectively, water absorption are 8.77%, 9.18%, 9.64%, and 10.26% respectively.Based on the overall results of this study, the studied interlocking brick is able to use as the standard interlocking bricks which compressive strength over 2.5 MPa, water absorption is not over 15%