它具有掺量低、减水率高的优点，但与水泥适应性较差和坍落度损失大一直是混凝土生产上的难题。
It has high water reducing rate at low dosage whether the adaptability problem with cement and high slump loss are always the point in concrete production.
氨基磺酸系高效减水剂asp的减水率高、坍落度损失小，但价格较高、混凝土保水性差，限制了其应用。
ASP has high water-reducing rate and low slump loss, but it is expensive, and the water-retention of concrete is bad, which limit its application.
这两种复配型减水剂能明显改善混凝土的和易性，降低坍落度损失和提高混凝土抗压强度。
They can remark ably improve the workability, reduce the gradual loss of lump and improve the compressive strength of concrete.
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