An investigative study on the mechanical properties of rice husk ash blended cement concrete with crumb waste rubber tires as partial fine aggregate replacement

• Main Authors: Isberto, Carmela Denise C., Labra, Krystoffer Lloyd D., Landicho, Jan Marielle B.
• Format: text
• Language: English
• Published: Animo Repository 2018
• Subjects: Cement; Concrete; Rice hulls; Building materials; Civil and Environmental Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/5789
• Institution: De La Salle University

An investigative study is made to use crumb waste rubber tires (CWRT) as a fine aggregate t rice husk ash (RHA) blended concrete. It is generally known that the composite system of RHA and ordinary portland cement (OPC is inherently superior to pure OPC. On the other hand, the use of CWRT as a partial aggregate replacement is limited due to the significant decrease in the mechanical property of the concrete it results to. Up to now, little research has been done to design an efficient method that restitutes this loss in mechanical strength. Correspondingly, the researchers intend to investigate the mechanical properties of concrete with RHA and CWRT as concrete and fine aggregate replacements, respectively, with the prospect that the presence of RHA will compensate for the loss in mechanical strength induced by CWRT. In the study, a potential approach to convert rice husk into RHA exhibiting heightened pozzolonic reactivity by controlled burning and grinding is provided. Using a universal testing machine, mechanical properties that will be tested include compressive strength, split tensile strength, and flexural strength. From this RHA blend, CWRT will be added in increments of 5%, 10%, 15%, and 20% fine aggregate replacement. This study is made as an attempt to maximize the utilization of waste as a replacement to conventional concrete components to augment the problem in waste management and shortage in concrete raw materials.