Pengaruh Penggunaan Serbuk Cangkang Telur Sebagai Bahan Pengganti Sebagian Semen Terhadap Kuat Tekan dan Kuat Lentur Mortar
DOI:
https://doi.org/10.30601/jtsu.v12i1.7069Kata Kunci:
Eggshell Powder, Compressive Strength, Flexural Strength, Mortar.Abstrak
Mortar is a construction material consisting of a mixture of cement, sand, and water, then mixed evenly to bind bricks and concrete blocks. Eggs are one of the staple foods in the world, including in Indonesia. Eggs that have been used for food certainly leave a lot of shell waste. Chicken eggshells contain about 98.2% Calcium Carbonate, while as is known, Calcium Carbonate is one of the components of Portland cement. Based on the information above, this study aims to analyze the effect of adding chicken eggshell powder to the mechanical strength of mortar and also plays an important role in developing the potential use of eggshell waste as a partial replacement for cement in mortar mixtures. The use of eggshell powder based mortar uses a mixture variation of 0%, 2.5%, 5%, 7.5% and 10% of the weight of cement. Where each variation consists of 3 samples, so the total sample is 15 samples for compressive strength testing and 15 samples for flexural strength testing. To determine the strength of the mechanical properties of the mortar, two tests were carried out, namely compressive strength with a test specimen size of 5x5x5 cm and flexural strength with a test specimen size of 4x4x16 cm. Mechanical strength testing was conducted after the mortar was 28 days old. The optimal strength value in the compressive strength test sample was at a variation percentage of 7.5% with a strength value of 17.36 MPa and a percentage increase of 25.45% from normal mortar. While the optimal strength value in the flexural strength test sample was at a variation percentage of 10% with a strength of 0.76 MPa and a percentage increase of 4.4% from normal mortar. This indicates an optimal point in the addition of eggshell powder, where mechanical strength can be increased without reducing the overall quality of the mortar so that the use of eggshell powder as a partial replacement for cement in mortar can be further developed.Referensi
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