ABSTRACT
Figure 1 shows the autogenous shrinkage from the time of final setting. From these results, it is noted that autogenous deformation of the HPC mixture without SAP addition is considerable (larger than 700 μm/m in the first 160 hours after the time of final setting). In comparison, when 0.3% SAP (by weight of the cement) was added into the mixture, autogenous shrinkage decreases significantly. The autogenous shrinkage of HPC with SAP2 reduces by 26%. While for the HPC with SAP1, it reduces by more than 65%. Moreover, it should be noted that in the first 10 hours after the final set, the concrete matrix containing SAP1 swells a bit and then shrinks gradually.
