高性能聚合物砂浆的制备与性能研究

Preparation and performance research of high performance polymer mortar

采用定向级配复合技术优化了河砂级配,再采用响应曲面法构建了聚合物砂浆性能预测模型,并对聚合物砂浆的配合比进行了优化。此外,研究了原材料组分交互作用对聚合物砂浆性能的影响,并建立了聚合物砂浆7 d抗折、抗压强度与水泥掺量、膨胀剂掺量、胶粉掺量的二阶响应曲面模型。结果表明:高性能聚合物砂浆的最佳配合比为水泥掺量420 g、膨胀剂掺量10 g、胶粉掺量20 g,以此配合比制备的高性能聚合物砂浆7 d抗折、抗压强度分别可达8.4 MPa、55.7 MPa。

The directional gradation composite technology was used to optimize the river sand gradation,and the response surface method was used to construct a performance prediction model for polymer mortar,and the mix proportion of polymer mortar was optimized.In addition,the influence of raw material component interaction on the performance of polymer mortar was studied,and a second-order response surface model was established for the 7 d flexural and compressive strength of polymer mortar with cement,expansion agent,and rubber powder dosage.The results show that the optimal mix proportion for high performance polymer mortar is 420 g of cement,10 g of expansion agent,and 20 g of adhesive powder,and the high performance polymer mortar prepared from this mix proportion can achieve a 7 d flexural and compressive strength of 8.4 MPa and 55.7 MPa.