Pengaruh Pola Anyaman terhadap Perilaku Lentur Textile Reinforced Concrete (TRC) dengan Perkuatan Serat Rami

Abstract

Kebutuhan terhadap beton telah meningkat di Indonesia. Salah satu inovasi beton yang sedang dikembangkan adalah Textile Reinforced Concrete (TRC). Serat rami memiliki potensi untuk digunakan sebagai perkuatan TRC karena memiliki kekuatan tarik yang cukup tinggi. Penelitian bertujuan menganalisis perilaku lentur TRC dengan perkuatan serat rami. Penelitian dilaksanakan pada bulan Februari hingga Juni 2021 di IPB. Penelitian dilakukan melalui beberapa tahapan, yaitu pengujian material, mix design, penganyaman dan pelapisan serat rami, pembuatan dan perawatan benda uji, dan pengujian. Perilaku lentur TRC yang dianalisis, di antaranya kuat lentur, kekakuan, daktilitas, dan perilaku retak. Perkuatan serat rami dapat meningkatkan daktilitas dan menurunkan kekakuan pelat mortar. Akan tetapi, anyaman serat rami dengan pola anyaman tertentu dapat menurunkan kuat lentur. Pelapisan Unsaturated Polyester Resin (UPR) memberikan peningkatan kuat lentur dan daktilitas serta penurunan kekakuan pada TRC. Perilaku retak TRC serat rami terlapisi UPR mengalami beberapa fase, yaitu uncracked concrete, crack formation, crack stabilization, dan failure. Pola anyaman yang menghasilkan kuat lentur tertinggi adalah pola anyaman dua sumbu yang terlapisi UPR, sebesar 7.84 MPa.

The demand of concrete has increased in Indonesia. A reinforced concrete innovation being developed is Textile Reinforced Concrete (TRC). Ramie fiber has great potential to be used as a construction material because it has advantages over other natural fibers, such as tensile strength properties. The research aims to analyzed flexural behaviour of Ramie fiber TRC. This research was conducted from February until June 2021 at IPB University. The research was carried out through several stages, that are testing of TRC materials, mix design, weaving and coating ramie fiber, manufacturing and curing test objects, and testing. The flexural behavior analyzed flexural strength, stiffness, ductility, and crack behavior. Ramie fiber reinforcement can improve ductility and reduce stiffness of mortar plates. However, woven ramie fiber with a certain woven pattern can reduce flexural strength. Coating ramie fiber with Unsaturated Polyester Resin (UPR) provides an increase in flexural strength and ductility but decrease in stiffness. Phases of crack behaviour of UPR-coated are uncracked, crack formation, crack stabilization, and failure. The woven pattern that produces the highest flexural strength is the two-axis woven pattern for UPR-coated ramie, which is 7.84 MPa.