PENGARUH VARIASI KOMPOSISI LUMPUR TINJA KERING TERHADAP KUAT TEKAN PAVING BLOCK

Abstract

The use of fecal sludge as a building material is an innovative effort to support sustainable waste management and reduce dependence on natural materials. This study aims to analyze the effect of using dried fecal sludge as a partial replacement for fine aggregate on the compressive strength and physical properties of paving blocks. The research method used was a laboratory experiment with variations in the substitution of dried fecal sludge of 0%, 10%, 30%, and 50% of the fine aggregate weight. Each variation was replicated three times and tested at 3, 7, 14, and 28 days. Tests included compressive strength, specific gravity, and water absorption in accordance with SNI 03-0691-1996 standards.
The results showed that the addition of dried fecal sludge decreased the compressive strength and increased the water absorption of paving blocks. However, at 10% variation, the resulting compressive strength did not meet SNI standards for Class D paving blocks (≥ 10 MPa). The higher the amount of fecal sludge used, the compressive strength tends to decrease due to increased porosity and reduced interparticle bonding. Thus, processed dried fecal sludge has the potential to be used as a substitute for fine aggregate at an optimum level of less than 10%, without significantly reducing quality. This research is expected to form the basis for developing environmentally friendly construction materials from domestic waste.