TY - JOUR AU - Carmela Denise Isberto, AU - Krystoffer Lloyd Labra, AU - Jan Marielle Landicho, AU - Richard De Jesus, PY - 2021/03/27 Y2 - 2024/03/29 TI - EFFECT OF RICE HUSK ASH AND CRUMB WASTE RUBBER TIRES TO MICROSTRUCTURE AND STRENGTH OF CONCRETE JF - GEOMATE Journal JA - INTERNATIONAL JOURNAL OF GEOMATE VL - 20 IS - 79 SE - Articles DO - UR - https://geomatejournal.com/geomate/article/view/219 SP - 16-21 AB - <p>: The study aimed to seek for alternative use of crumb waste rubber tires (CWRT) in construction to <br>lessen its environmental impact. Its use as a component in concrete has resulted in reduced mechanical and <br>durability performance. On the other hand, rice husk ash (RHA), when used in conjunction with ordinary Portland <br>cement improves the mechanical properties of concrete. Hence, to exploit this influence of RHA to strength, this <br>study incorporated RHA in concrete to compensate for the strength reduction brought about by the inclusion of <br>CWRT, as partial replacement to fine aggregates. RHA is also a by-product of agricultural waste thus, to maximize <br>its potential as a cementitious material, an optimized process was developed for the study. Controlled burning and <br>grinding were employed to maximize the pozzolanic properties obtained from RHA. Chemical treatment of CWRT <br>has not resulted in a significant increase in strength for mortar specimens thus, treatment was not employed for <br>CWRT used in concrete. Compressive strength was tested for concrete with varying CWRT ranging from 5 to <br>20% fine aggregate replacement. RHA replacement of cement was fixed at 10% based on the result of an earlier <br>related study. Concrete with 10% RHA and 5% CWRT was found to be the optimal mix with a 9.5% increase in <br>strength compared to normal concrete.</p> ER -