无机矿物聚合物混凝土界面过渡区影响因素的研究

Study on influencing factors of the interfacial transition zone of geopolymer concrete

通过无机矿物聚合物与石材间的黏结强度来衡量界面过渡区的力学性能,并利用微观手段观察界面过渡区的微观结构探索影响无机矿物聚合物界面过渡区力学性能的主要因素,为无机矿物聚合物混凝土的进一步应用奠定基础。无机矿物聚合物与大理石的界面黏结强度高于花岗岩的界面黏结强度,其28d界面黏结强度最高可达到7.9MPa。随着无机矿物聚合物中n(SiO2)/n(Al2O3)比值在2.6～2.9的范围内不断增加,无机矿物聚合物与大理石和花岗岩的界面黏结强度也在不断提高,最高可分别达到7.9MPa和4.3MPa。而随着n(SiO2)/n((Na2O)比值的不断增加,无机矿物聚合物与石材间的界面黏结强度则不断降低。无机矿物聚合物与石材间的界面过渡区力学性能受石材的种类和无机矿物聚合物自身的氧化物组成影响。

Mechanical properties of interracial transitional zone between geopolymer and stone are standardized by testing its bonding strength and its microstructure is also observed through the relative devices.In this way,the major factors affecting the mechanical properties of the zone are searched and the efforts to lay a foundation for further applying geopolymer concrete are made.The interracial bonding strength between geopolymer and marble can be up to 7.9 MPa for 28 days,which is higher than the one between geopolymer and granite.With the ratio of n（SiO2）/n（Al2O3） from geopolymer component continuously rising from 2.6 to 2.9,interracial bonding strengths between geopolymer on the one hand and marble and granite on the other hand also rise constantly to reach 7.9 MPa and 4.3 MPa respectively.However, with the ratio of n （ SiO2）/n （Na2O） continuously increasing,the interfacial bongding strength between geopolymer and stone decreases all the time.The mechanical properties of interracial transitional zone between geopolymer and stone are affected by the variety of stone and the oxide component of geopolymer.