低强度等级泵送混凝土用聚羧酸盐减水剂的研制与应用

The study and application of polycarboxylate superplasticizer for low-strength grade pumping concrete

本文旨在研制一种适用于低强度等级泵送混凝土的聚羧酸盐减水剂,经混凝土的性能测试表明,与萘系减水剂相比,该减水剂具有和易性好,抗压强度较高,耐久性能好等优点;且与质量较差的砂石材料(含泥量较高、级配不合理、细度模数小的细砂)有较好的适应性,对聚羧酸盐减水剂的在低强度等级混凝土的推广使用起到一点推动和借鉴作用。

The polycarboxylate superplasticizer for low-strength grade pumping concrete was studied in the paper.The concrete performance testing showed that compared with the naphthalene superplasticizer,the polycarboxylate superplasticizer has better workability,higher compressive strength and better durability performance.The polycarboxylate superplasticizer has better adaptability with the gravel material of poor quality（high silt content,gradation unreasonable,fineness modulus of silver sand）.The polycarboxylate superplasticizer in the low-strength grade of concrete will play a little push effect for promoting and reference.