Impact of High-Performance Expansion and Shrinkage-Reducing Agents on the Mechanical Properties and Shrinkage Compensation of High-Strength Concrete

A large number of binder ingredients such as cement and active mineral admixtures are used in the preparation high-strength concrete, water:binder ratio is extremely low. This leads to a amount shrinkage concrete at early stage curing, which poses great threat safety durability structure. To solve cracking problem induced by high shrinkage, we choose change admixture it. In this study, high-performance expansion agent (HPEA) shrinkage-reducing agent, currently studied small number, were selected changing way admixture, their effects on strength compared analyzed. The results show that addition HPEA beneficial compressive sufficient can be obtained using HPEA, but there an excessive delayed produce cracks later stage. plays adverse role development strength, it performs better inhibiting shrinkage. combination reducing largely avoid formation cracks, two have certain synergy. main reason compensates for some negative further strengthens inhibition effect extent avoids risk caused problems.