The effect of sintering temperature on the properties of metakaolin artificial lightweight aggregate

This paper describes the effect of sintering temperature on the properties of metakaolin artificial lightweight aggregate (ALWA). Three types of sintering temperature applied in this research are 900°C, 1000°C and 1100°C, whereas ALWA without sintering treatment is used as data control. Properties of metakaolin ALWA investigated in this research are specific gravity, water absorption, physical appearance, porosity and aggregate impact value. Standard test used in this research is ASTM, AFNOR and British Standart. Based on the research results, it can be concluded that sintering temperature is greatly affect on the properties of metakaolin ALWA. Increased sintering temperatures can lead to decreased values of specific gravity, increased pore amount, increased aggregate impact value, increased water absorption values and change aggregate color to be more bright. Referring to the test results, sintering temperature not exceeding 900°C is recommended, as it provides good physical and mechanical properties to ...