Electronic Theses and Dissertation

Dalam dunia konstruksi khususnya di Indonesia, beton merupakan salah satu bahan konstruksi yang paling sering digunakan. Karena sering terjadinya gempa di Indonesia, ada beberapa infrastruktur menggunakan beton ringan sebagai pengganti beton konvensional sebagai bahan konstruksi utamanya. Beton ringan adalah beton yang memiliki kepadatan (density) lebih ringan dari pada beton pada umumnya dengan berat volume 1.850 kg/m³. Bahan campuran (additive) beton ringan bisa menggunakan bahan limbah. Bahan atau limbah buangan yang ada di sekitar lingkungan dapat dimanfaatkan sebagai bahan tambahan dalam campuran beton ringan seperti limbah bata merah. Untuk penelitian ini bata merah didapatkan dari sisa hasil pengujian Laboratorium Konstruksi dan Bahan Bangunan di Prodi Teknik Sipil, Departemen Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala. Bata merah yang sudah tidak terpakai dihancurkan menggunakan palu sehingga lolos saringan 9,52 mm. Tujuan dari penelitian ini untuk mengetahui bagaimana pengaruh campuran agregat bata merah terhadap hasil kuat tekan dan kuat tarik belah beton ringan. Pada penelitian ini digunakan SG (Specific Gravity) sebanyak 3 jenis yaitu SG 1,0; SG 1,2; dan SG 1,4 dengan persentase campuran bata merah 10%, 20% dan 40%. Pengujian kuat tekan SG 1,2 campuran 20% dilakukan pada umur beton 7 hari, 14 hari dan 28 hari, sedangkan SG 1,0 campuran 20%, SG 1,2 campuran 10%, 40% dan SG 1,4 campuran 20% dilakukan pada umur beton 28 hari. Dan untuk pengujian kuat tarik belah hanya dilakukan pada umur beton 28 hari. Total keseluruhan benda uji sebanyak 36 benda uji dengan menggunakan silinder ukuran 150 mm x 300 mm. Hasil penelitian memperlihatkan SG 1,4 dengan campuran agregat bata merah 20% mendapatkan hasil kuat tekan tertinggi yaitu rata-rata sebesar 8,1 MPa dan kuat tarik belah rata-rata sebesar 1,4 MPa sedangkan hasil kuat tekan terendah yaitu pada SG 1,0 dengan campuran agregat bata merah 20% dimana hasil kuat tekan rata-ratanya sebesar 2,0 MPa dan kuat tarik belah rata-rata sebesar 0,4 MPa.

In the field of construction, particularly in Indonesia, concrete is one of the most frequently used building materials. Due to the frequent occurrence of earthquakes in Indonesia, some infrastructures use lightweight concrete as a substitute for conventional concrete as the main construction material. Lightweight concrete is concrete with a lower density than regular concrete, with a volume weight of 1,850 kg/m³. Additives for lightweight concrete can use waste materials. Waste materials from the surrounding environment can be utilized as additives in lightweight concrete mixtures, such as red brick waste. For this research, red bricks were obtained from leftover test results at the Construction and Building Materials Laboratory of the Civil Engineering Department, Faculty of Engineering, Syiah Kuala University. The unused red bricks were crushed using a hammer to pass through a 9.52 mm sieve. The aim of this study is to determine the effect of the red brick aggregate mixture on the compressive strength and splitting tensile strength of lightweight concrete. In this research, three types of Specific Gravity (SG) were used, namely SG 1.0, SG 1.2, and SG 1.4, with red brick mixture percentages of 10%, 20%, and 40%. The compressive strength test for SG 1.2 with a 20% mixture was conducted at 7 days, 14 days, and 28 days, while the compressive strength tests for SG 1.0 with a 20% mixture, SG 1.2 with 10% and 40% mixtures, and SG 1.4 with a 20% mixture were conducted at 28 days. The splitting tensile strength test was only conducted at 28 days. A total of 36 test specimens were used, with cylinder dimensions of 150 mm x 300 mm. The results of the study showed that SG 1.4 with a 20% red brick aggregate mixture achieved the highest average compressive strength of 8.1 MPa and an average splitting tensile strength of 1.4 MPa, while the lowest compressive strength was found in SG 1.0 with a 20% red brick aggregate mixture, with an average compressive strength of 2.0 MPa and a splitting tensile strength of 0.4 MPa.