Ketahanan Panel Beton Ringan Geopolimer Gula Aren dan Slag Aluminium Terhadap Suhu Tinggi

Abstract

High temperatures can have impact on structural quality, namely the disintegration of hydration products and aggregates, decreased mechanical properties, and increased concrete porosity. Efforts that can be made to minimize structural damage are utilizing concrete innovations with added aluminum slag and palm sugar. Combination of aluminum slag and palm sugar in geopolymer concrete was carried out with the aim of producing lightweight concrete that has good resistance at high temperatures. Aluminum slag and palm sugar were mixed into the concrete mix with the ratio of fly ash: aluminum slag: palm sugar denoted by variations 1,2,3,4,5, and 6 namely 99,9%:0%:0,1%; 89,9%:10%:0,1%; 84,9%:15%:0,1%; 99,85%:0%:0,15%; 89,85%:10%:0,15%; and 84,85%:15%: 0,15%. The dimensions of concrete samples are 10,5x21 cm with curing for 14 days and 28 days, then burned with a combustion temperature of 500 ℃. The tests conducted were compressive strength, porosity, and Ultrasonic Pulse Velocity. The test results showed the best concrete quality in variation 6 with a percentage loss of compressive strength at 28 days of age of 41,2%, a percentage loss of porosity of 17,18%, and a percentage loss of density of 15,4%. Aluminum slag and palm sugar can increase compressive strength, density, and reduce porosity at high temperatures.