玻璃粉在超高强水泥基材料中的作用机理

Effect mechanism of glass powder on ultra-high strength cement-based materials

采用强度试验、X射线衍射及扫描电镜等方法,研究玻璃粉对超高强水泥基材料强度和微结构的影响,揭示玻璃粉在超高强水泥基材料中的作用机理。研究结果表明:采用玻璃粉可制备抗压强度超过100 MPa的超高强水泥基材料,而且当玻璃粉掺量在20%以内时,试样的抗压强度随着玻璃粉掺量的增加而增大;玻璃粉不仅能填充浆体结构中的孔隙,还能发生火山灰反应,生成C-S-H凝胶,进而改善材料的微结构,提高材料的强度。

The effect of glass powder on the strength and microstructure of ultra - high strength cement - based materials was studied by strength test, X -ray diffraction （XRD）and scanning electron microscopy （SEM）techniques, which will reveals the action mechanism of glass powder in ultra - high strength cement - based materials.Testing results show that glass powder can be used to prepare ultra - high strength cement-based materials with compressive strength more than 100 MPa, and the compressive strength increases with the increase of the content of glass powder if its content is within 20% ; glass powder can not only fill the pores in the paste, but also react with cement hydrates and generate C-S-H gel, which can improve the microstructure and strength of this kind of material.