Pengaruh Abu Sekam Padi sebagai Bahan Pozzolan terhadap Karakteristik Mekanik dan Fisis Bata Ringan CLC

Abstract

Penelitian ini bertujuan menganalisis pengaruh Abu Sekam Padi (ASP) sebagai bahan pozzolan terhadap karakteristik mekanik dan fisis bata ringan Cellular Lightweight Concrete (CLC), serta membandingkan sampel foamed dan non-foamed. Bata ringan dibuat dengan variasi ASP 0%, 5%, 10%, 15%, dan 20%, kemudian diuji densitas, daya serap air, kuat tekan, dan kuat lentur. Hasil penelitian menunjukkan bahwa kadar ASP 10% menghasilkan karakteristik optimum. Pada sampel foamed diperoleh densitas 1146 kg/m³, kuat tekan 5,00 MPa, kuat lentur 1,40 MPa, dan daya serap air 7,64%, sedangkan sampel non-foamed memiliki densitas 1662 kg/m³, kuat tekan 17,02 MPa, dan kuat lentur 4,21 MPa. Penggunaan foaming agent menurunkan densitas hingga memenuhi kategori bata ringan menurut SNI 8640:2018, namun diikuti penurunan sifat mekanik dibandingkan sampel non-foamed. Hasil penelitian menunjukkan bahwa penggunaan ASP sebesar 10% merupakan komposisi optimum pada bata ringan CLC.

This study aimed to analyze the effect of rice husk ash (RHA) as a pozzolanic material on the mechanical and physical properties of Cellular Lightweight Concrete (CLC) bricks and to compare the performance of foamed and non-foamed specimens. The CLC bricks were produced using RHA contents of 0%, 5%, 10%, 15%, and 20%, followed by density, water absorption, compressive strength, and flexural strength tests. The results showed that the optimum performance was achieved with 10% RHA. The foamed specimen exhibited a density of 1146 kg/m³, compressive strength of 5.00 MPa, flexural strength of 1.40 MPa, and water absorption of 7.64%, whereas the non-foamed specimen had a density of 1662 kg/m³, compressive strength of 17.02 MPa, and flexural strength of 4.21 MPa. The use of a foaming agent reduced the density, enabling the specimens to meet the lightweight brick classification specified in SNI 8640:2018, but also resulted in lower mechanical properties than those of the non-foamed specimens. The findings indicate that the incorporation of 10% RHA is the optimum composition for improving the properties of CLC lightweight bricks.