Akbar, Wahyu (2024) Pemanfaatan Perlite Dalam Meningkatkan Kuat Tekan Pada Beton. Other thesis, Universitas Islam Riau.

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Abstract

Indonesia, as part of the Pacific Ring of Fire, has significant potential in terms of perlite availability. Java, Bali, Nusa Tenggara, and several other regions are known to have substantial perlite deposits. Data from the Ministry of Energy and Mineral Resources indicate that perlite exploration in Indonesia has not yet been optimally utilized for the construction industry. Currently, the use of perlite is more commonly found in agriculture and horticulture industries, as well as thermal insulation materials. Given the abundant perlite reserves in Indonesia, along with the need to improve the quality of construction materials, this research aims to further explore the effects of adding perlite on the mechanical properties of concrete, especially compressive strength. The method used in this research is an experimental laboratory study conducted at the structure, materials, and computer laboratory of the Faculty of Engineering, Islamic University of Riau. This study involves replacing fine aggregates with perlite in proportions of 5%, 10%, and 15%, and evaluating its impact on slump value and concrete compressive strength. The results showed that increasing the proportion of perlite resulted in higher slump values, indicating improved workability. Specifically, the slump value increased from 8.9 cm in normal concrete to 9.2 cm, 9.5 cm, and 9.7 cm for perlite replacements of 5%, 10%, and 15%, respectively. This demonstrates that perlite can enhance the ease of mixing and forming concrete. In terms of compressive strength, the addition of 5% perlite produced an average compressive strength of 27.74 MPa, which is higher than normal concrete with an average compressive strength of 26.52 MPa. However, increasing the perlite proportion to 10% and 15% caused a slight decrease in compressive strength, with average values of 27.36 MPa and 27.18 MPa, respectively. This suggests that while perlite can improve workability, excessive amounts can negatively affect concrete strength. Overall, this study concludes that perlite is beneficial in improving concrete workability and can be effectively used up to a 5% substitution level to enhance both workability and compressive strength. However, higher proportions should be carefully considered to maintain a balance between workability and structural strength.

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