EXPERIMENTAL STUDY ON PERFORMANCE OF CELLULAR LIGHTWEIGHT CONCRETE DUE TO EXPOSURE HIGH TEMPERATURE

Abstract

Generally, making the building load lighter is to use lightweight concrete on wall components. Cellular Lightweight Concrete (CLC) is lighter than red-bricks because CLC contains pores. Changes in temperature due to building fires impact the characteristics and performance of CLC, especially in density, compressive strength, and visual shape of CLC. The research aims to analyze the performance of CLC; compressive strength and appearance of CLC surfaces after exposure to high temperatures. CLC sample is the block with size 60 cm length, 10 cm width, and 20 cm height. Variation of temperature exposure time is 10 minutes, 20 minutes, 30 minutes and 40 minutes. CLC is placed close to traditional brick kilns with an average surface temperature of 370 degrees Celsius along 40 minutes of combustion. The CLC block compressive strength value due to exposure to high temperatures for 40 minutes is 0.3 MPa. The compressive strength of CLC after exposure to high temperatures decreases by 42.3% compared to CLC at room temperature. Whereas, the visual form on the surface of CLC gives rise to a blackish grey colour resulting from exposure to high temperatures. This study indicated that the dry and cracked surface texture on CLC has caused a decrease in the performance includes density and compressive strength of CLC. Therefore, CLC needs to maintain after being exposed to high temperatures by providing an additional layer on the CLC surface