聚丙烯酸树脂增韧碱激发粉煤灰地质聚合物的性能研究

Study on Toughening of Alkali-activated Fly Ash-based Geopolymer Modified by Acrylic Resin

由于碱激发硅灰粉煤灰复配地质聚合物的韧性较差,本文利用聚丙烯酸树脂TC-200对其进行增韧及表征。结果表明,TC-200最佳掺量为1 wt%时,试样的抗压抗折强度同时增大,压折比减小,韧性显著提高。结合XRD、SEM分析和Griffith理论证实了TC-200可改变粉煤灰基地质聚合物内部的裂缝表面能,从而达到增韧的效果。

Acrylic resin named as TC-200 was used to reinforce toughness of alkali-activated fly ash-based geopolymer.Characteristic results indicated that the compressive and flexural strength of alkali-activated fly ash-based geopolymer with amount of 1 wt% TC-200 flexibilizer were improved simultaneously and the ratio of compressive to flexural strength was decreased.Combining with XRD,SEM results and Griffith theory,the fracture surface energy of geopolymer matrix could be modified by TC-200 flexibilizer so as to achieve the effect of toughening for geopolymer.