聚合物硫铝酸盐水泥基材料的黏结性能

Bonding Performance of Polymer Sulphoaluminate Cement-Based Materials

利用聚合物胶粉改性硫铝酸盐水泥的净浆和砂浆,通过测试拉伸黏结强度、抗折黏结强度和抗压强度,研究不同掺量聚合物胶粉对水泥基材料界面结合能力的影响。试验结果表明:在净浆中,当胶粉掺量为m(胶粉)∶m(水泥)=0.03时,28 d的拉伸黏结强度最大为3.26MPa;在砂浆中,当胶粉的掺量为m(胶粉)∶m(水泥)=0.009,水灰质量比在0.42时,14 d抗折黏结强度最大为7.0 MPa。

Sulphoaluminate cement paste and mortar were modified with polymer power.Testing means of tensile bond strength,flexural bond strength and compressive strength were used for testing the interface bonding capacity of cement materials with different polymer power additions.The results show that the tensile bond strength of the cement with 3% mass fraction of polymer powders in its paste can reach 3.26 MPa after 28 d aging;when the water/cement ratio is 0.42,the flexural bond strength of the cement with 0.9% mass fraction of polymer powders in its mortar can reach 7.0 MPa after 14 d aging.