Abstract:
This research aims to study the properties of moderate lightweight concrete blocks with the replacement of sand by stone dust in the ratio of 0%, 25%, 50%, 75%, and 100% by weight with the water cement ratio of 0.60 for all mixes. The dry density, compressive strength, and water absorption were tested following Thai Industrial Standards Institute (TIS) number 2601-2556 and thermal conductivity was also conducted. The test results showed that stone dust could be used to replace sand up to 100% for the production of cellular lightweight concrete blocks class C12 with the dry density of 1,001-1,200 kg/m3 that satisfied the strength and water absorption criteria. The thermal conductivity of developed moderate lightweight concrete blocks tended to decrease with increasing of stone dust replacement