TY - JOUR AU - Khamput, Prachoom AU - klathae, Tawich PY - 2022/06/28 Y2 - 2024/03/29 TI - Properties of Concrete Block Incorporating Rice Husk Ash as Partial Replacement for Fine Aggregate JF - Journal of Engineering, RMUTT JA - j.eng.rmutt VL - 20 IS - 1 SE - Research Articles DO - UR - https://ph01.tci-thaijo.org/index.php/jermutt/article/view/248557 SP - 81-91 AB - <p>This research aims to study the feasibility of using rice husk ash (RHA) partial fine aggregates replacement at ratio of ordinary Portland cement Type 1 (OPC) to RHA 1:3 (3RHA), 1:4 (4RHA) and 1:5 (5RHA) to produce concrete blocks. The properties of concretes such as compressive strength at 7, 14, 21 and 28 days, water absorption capacity drying shrinkage unit weight and thermal conductivity of concrete block at 28 days were investigated. The result showed that the compressive strength of concrete block decreased with an increasing rate of RHA replacement while water absorption of concrete block increased led to unit weight of concrete block was decreased. When the values were compared with the Thai Industrial Standards Institute TISI.58-2533 non-load bearing concrete blocks, which met the minimum specification of concrete block (than 2.5 MPa) at 28 days. The results indicated that the compressive strength of concrete block 3RHA and 4RHA were met the minimum specification. In terms of the production cost, RHA to partial fine aggregates replacement at ratio 1:3 (3RHA) and 1:4 (4RHA) reduction in the material cost by 8–19% compared with CT concrete block.</p> ER -