Property characterization of abaca-fiber-reinforced pervious concrete with recycled concrete as partial aggregate replacement /
Carlos Ivan B. Ibabao, Aira Joanna S. Masaganda, Jerome O. Mercado, Joshua C. Rubio, Ma. Tracey S. Valdepeņa, James Patrick M. Verania .--
- Manila: Technological University of the Philippines, 2023.
- xviii, 138pages: 29cm. +1 CD-ROM ( 4 3/4in.)
Thesis (undergraduate)
College of Engineering .--
Includes bibliography:
Construction and demolition wastes (CDW) pose a challenge to developing countries, including the Philippines. The recycling of CDW had been known as a desirable solution, hence, the insufficiency of information and authority in CDW management hinders this objective. This study focuses on Recycled Concrete Aggregates (RCA) sourced from demolition sites in Manila, Philippines, as it intends to reduce the volume of CDW and by promoting sustainability in the field of construction. The study aims to determine the physical and mechanical properties of RCA pervious concrete with abaca fiber reinforcement. In this study, the RCA ranges from 4.5 mm to 19 mm in sizes with partially and fully replaced coarse aggregates in three sets of pervious concrete mixes. Included in the mix for pervious concrete are cement, natural and recycled aggregate, silica fume, abaca fiber (Musa textilis), and water. The first set had Ordinary Portland Cement (OPC) and coarse aggregate, the second set used OPC with partial and full RCA replacement at 20%, 25%, 30%, and 100%, and the third set used OPC with partial RCA replacement at 20%, 25%, 30%, and 100% with 0.15% abaca fiber and 5% silica fumes. The pervious concrete mixes were subjected to ASTM C136 and ASTM C33 crushing and sieving procedures. Compressive and flexural strengths were also measured for the determination of its mechanical properties, whereas the results were expected to be comparable to the control sample in strength. Based on the results, the use of recycled concrete aggregates has found similarities in its physical qualities as natural coarse aggregates, although the results vary on the properties tested. The amount of recycled concrete aggregate (RCA) that produced the strongest results was found to be 25%, especially when combined with silica fumes and abaca fiber, with results of 5.992 MPa, 6.594 MPa, 6.748 MPa for its compressive strength on its 7th, 14th, and 28th day, and 2.435 MPa for the flexural strength. Comparing RCA mixes with and without abaca fiber reinforcing, it was found that the former had greater strength.