HIDAYAT, RIKI (2025) PENGARUH SUBSTITUSI SEMEN DENGAN ABU CANGKANG BEKICOT TERKALSINASI TERHADAP KUAT TEKAN BETON. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Technological developments in the construction sector have resulted in various innovations, one of which is the utilization of alternative materials such as concrete. This study aims to explore the effect of using calcined snail shell ash as a cement substitute on the important parameters of concrete, namely volume weight, compressive strength, and water absorption. This research used an experimental method by comparing K225 control concrete (fc' 18.68 MPa) with concrete tested with 0%, 5%, 10%, 15%, and 20% cement substitution variations. The test results showed that the maximum compressive strength was obtained at the 5% substitution level of calcined snail shell ash, with a volume weight of 2280.92 kg/m³, compressive strength of 35.92 MPa, and water absorption of 2.73%. The conclusion of this study is that calcined snail shell ash can serve as an effective cement substitution material, thanks to its high calcium content, which can significantly increase the compressive strength of concrete. This research makes an important contribution to the development of alternative materials that are environmentally friendly and have the potential to improve the quality of concrete in construction. Keywords: Compressive Strength, Volume Weight, Absorption Capacity, Calcination, Archatina Fulica, Concrete. Perkembangan teknologi dalam sektor konstruksi telah menghasilkan berbagai inovasi, salah satunya adalah pemanfaatan material alternatif seperti beton. Penelitian ini bertujuan untuk mengeksplorasi pengaruh penggunaan abu cangkang bekicot yang telah dikalsinasi sebagai substitusi semen terhadap parameter penting beton, yaitu berat volume, kuat tekan, dan daya serap air. Penelitian ini menggunakan metode eksperimen yaitu dengan membandingkan beton kontrol mutu K225 (fc’ 18,68 MPa) dengan beton yang diuji dengan variasi substitusi semen 0%, 5%, 10%, 15%, dan 20%. Hasil pengujian menunjukkan bahwa kuat tekan maksimum diperoleh pada kadar substitusi 5% abu cangkang bekicot kalsinasi, dengan berat volume sebesar 2280,92 kg/m³, kuat tekan sebesar 35,92 MPa, dan penyerapan air sebesar 2,73%. Kesimpulan dari penelitian ini adalah abu cangkang bekicot yang dikalsinasi dapat berfungsi sebagai bahan substitusi semen yang efektif, berkat kandungan kalsium yang tinggi, sehingga mampu meningkatkan kuat tekan beton secara signifikan. Penelitian ini memberikan kontribusi penting dalam pengembangan material alternatif yang ramah lingkungan dan berpotensi meningkatkan kualitas beton dalam konstruksi. Kata Kunci: Kuat Tekan, Berat Volume, Daya Serap, Kalsinasi, Abu Cangkang Bekicot, Beton.
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