本文详细描述了早强型聚羧酸减水剂在修补砂浆中的应用情况,试验结果表明早强型聚羧酸减水剂的减水率可达25%以上,可以显著降低修补砂浆的水胶比,提高砂浆的力学性能,特别是抗折、粘结强度显著提高;其促强作用可以提高修补砂浆的早期强度,保证常温下采用普通水泥4h抗压强度达到5MPa以上;其减缩作用保证修补砂浆的收缩率比小于95%,提高修补砂浆的体积稳定性。 This paper describes in detail the application of early strength polycarboxylate water-reducing agent in repairing mortar. The results show that the early-strength polycarboxylate water-reducing agent has a water-reducing rate of more than 25%, which can significantly reduce the water of the repairing mortar Rubber ratio, improve the mechanical properties of mortar, especially flexural strength, bond strength increased significantly; its role in promoting the mortar can enhance the early strength of mortar repair, to ensure ordinary temperature 4h compressive strength of concrete to achieve 5MPa above its reduction effect to ensure Repair mortar shrinkage ratio less than 95%, improve the volume stability of repair mortar.