Utilization of artificial lightweight aggregate and unground rice husk ash as internal curing agents to modify performance of super-sulfated cement mortar

This study attempts to utilize cold-bonded fly ash based artificial lightweight aggregate (ALWA) and retrieved unground rice husk (URHA) as internal curing (IC) agents for improving performance of typical super-sulfaed cement (SSC) mortar fabricated with ternary mixture 85% slag, 10% gypsum, only 5% blended Portland (PCB). The ALWA partially replacing fine (FA) at four values 25, 50, 75, 100 vol.% was used. For evaluating impact using hybrid addition IC on performances SSC mortars, the amount after being optimized replaced by URHA levels vol.%. Experimental results showed that, FA up 50 led mortars remarkably increased workability uncompromised impacts strengths durability. Addition significantly improved fresh properties flexural strength but it negatively impacted durability resultant in terms water absorption, decreased UPV, drying shrinkage.