Product of Hollow Concrete Blocks Mixed with Rice Husk Ash and Cassava Fermentation Waste
by Prachoom Khamput, Chookiat Choosakul, Tawich Klathae, Suporn Rittipuakdee and Sunun Monkeaw
Journal
ASEAN Journal of Scientific and Technological Reports (AJSTR)
Volume
27
Issue
5 (September – October 2024)
Publisher
Thaksin University
ISSN
2773-8752 (Online)
Abstract
This research focuses on enhancing the properties of hollow concrete blocks by incorporating rice husk ash and cassava fermentation waste. The study replaces 15% of the cement with rice husk ash from a Bag Filter source and substitutes 0.5-10% of the stone dust by weight with cassava fermentation waste from Ajinomoto (Thailand) Co., Ltd. The hollow concrete blocks were formed using a cement-to-stone dust ratio of 1:10 and a water-to-binder ratio (W/B) of 0.625, with 7 x 19 x 39 cm dimensions. The test results indicate that the density of the hollow concrete blocks decreases with the addition of rice husk ash compared to control hollow concrete blocks. However, when a small amount of cassava fermentation waste is added, the weight and density of the hollow concrete blocks increase. Additionally, the moisture content of the rice husk ash mixed blocks is lower than that of the control hollow concrete blocks. Still, it increases proportionally with the inclusion of cassava fermentation waste. Combining rice husk ash and cassava fermentation waste leads to higher water absorption values in the hollow concrete blocks. Moreover, the compressive strength of the rice husk ash mixed hollow concrete blocks is greater than that of the control hollow concrete blocks. However, the addition of cassava fermentation waste reduces compressive strength.