Givari, M. (2023) Pengaruh Penggunaan Bakteri Escherichia Coli Dari Persentase Berat Semen Pada Beton Pulih Mandiri (self Healing Concrete). Other thesis, Universitas Islam Riau.

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Abstract

Concrete is the most common construction material found in building structures. The reason concrete is often used is because of its superiority which has high compressive strength and is resistant to high temperatures. However, like other construction materials, concrete also has weaknesses that can cause damage to the concrete. This damage can be caused due to errors during planning, implementation, and due to the influence of surrounding environmental factors. In addition to having advantages, concrete also has disadvantages, namely having a low tensile strength which causes it to crack easily before reaching its strength limit. One way to reduce cracks in concrete is to use additives, namely bacteria, which can make concrete heal independently or also known as self-healing concrete. The purpose of this study was to determine the effect of adding Escherichia coli bacteria to self-healing concrete, to determine the effect of adding Escherichia coli bacteria and without Escherichia coli bacteria. This research is experimental in nature conducted in the Laboratory of Structures, Materials and Civil Engineering Computers with reference to SNI 7656: 2012 with 15 samples of cylindrical test objects. The curing age was 28 days and the compressive strength, split tensile strength, crack recovery in concrete were tested visually, SEM (Scanning Electronic Microscope). From the research results, the effect of using Escherichia coli bacteria from the percentage by weight of cement on the compressive strength and split tensile strength of self-healing concrete for the compressive strength results of the uimuir 28-day compressive strength value for normal concrete with an average of 22.27 Mpa is the lowest compressive strength value. For the compressive strength of concrete with the addition of Escherichia Coli bacteria, the compressive strength value increased with an average of 26.04 MPa. And for the compressive strength of concrete with the addition of Escherichia Coli bacteria after being cracked is the lowest compressive strength value with an average of 18.68 Mpa. For the results of split tensile strength of uimuir concrete 28 days the value of split tensile strength for normal concrete with an average of 0.24 kg/cm2. For the split tensile strength of concrete with the addition of Escherichia Coli bacteria, the split tensile strength value increased with an average of 0.27 kg/cm2.

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