PENGARUH ABU CANGKANG SAWIT UNTUK SUBSTITUSI SEMEN TERHADAP KUAT TEKAN PAVING BLOCK

Along with the increasing development involving Paving Block. The need for efforts to obtain alternative materials that can be used as aggregate. In this final project author using Shells Palm Ash as a substitute for cement. Shells Palm Ash is the waste that has not been used optimally, whereas it contains almost 60% silica content. The Shells Palm Ash taken from palm oil processing plant in PT. Global Industrial Deurob Palembang, South Sumatra. In this final project, the authors review the quality of paving blocks based on Compressive Strength and Water Absorption by substitution of cement with palm shells ash grading from variations of 5%, 10%, 15%, 20%, 25% and 0% variation as control variable. Tests carried out on Paving Block ranging with age of 7, 14, 21, and 28 days. Results of this final project are compressive strength values on all variations of a mixture of palm shells ash as follows 5% is 176.667 kg / cm², 10% is 187.667 kg / cm², 15% is 149.333 kg / cm², 20% is120 kg / cm², 25% is 110,333 kg / cm². The water absorption average value of 5% is 3.474%, 10% is 4.287%, 15% is 5.101%, 20% is 5.997%, 25% is 7.516%. Paving blocks that use palm shells ash as a cement substitute material studied with the percentage of 5%, 10%, and 15% intire in the category B and C quality of paving block according to the standard SNI 03-0691-1996. Keywords : paving block, palm shell ash , compressive strength of paving block, absorption of paving bloc