Abstract:
This research aims to develop the optimal mix design and study the properties of cellular lightweight concrete blocks. Fly ash was used to replace Portland cement in the ratio of 0, 10, 20 and 30 percent by weight and bottom ash was used to replace sand in the ratio of 0, 10, 20 and 30 percent by weight. The test results showed that strength and water absorption of developed cellular lightweight concrete blocks met the requirement of the Thai Industrial Standards Institute (TIS) number 2601-2556. Fly ash and bottom ash could be used to replace Portland cement and sand, respectively, up to 30 percent by weight 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. A good