水性环氧树脂-聚丙烯纤维改性水泥基快速修补砂浆性能研究

Performance of waterborne epoxy resin-polypropylene fibermodified cement-based quick repair mortar

为改善机场道面修补砂浆脆性大和粘结性能差等问题,本文利用水性环氧树脂(WER)、聚丙烯(PP)纤维和硫铝酸盐水泥(SAC)制备出一种快速修补砂浆,并对其工作性能、力学性能、阻尼性能和耐硫酸盐腐蚀性能进行研究。结果表明,PP纤维和WER可显著提高快速修补砂浆韧性和粘结性能,使得快速修补砂浆2 h抗压、抗折强度和粘结强度分别达到22.3,5.1和3.7MPa,满足民用机场规范要求,同时可改善快速修补砂浆的阻尼性能和抗硫酸盐侵蚀性能。

In order to improve the shortcomings of airport pavement repair mortar,such as high brittleness and poor bonding performance,a kind of quick mortar was prepared by using waterborne epoxy resin(WER),polypropylene(PP)fiber and sulfoaluminate cement(SAC),and its working performance,mechanical properties,damping properties and sulfate corrosion resistance were studied.The results show that PP fiber and WER can significantly improve the toughness and bonding properties of the quick repair mortar,making the 2 h compressive and folding strength and bonding strength of the quick repair mortar reach 22.3,5.1 and 3.7 MPa respectively,meeting the requirements of civil airport specifications,and improving the damping performance and sulfate erosion resistance of the quick repair mortar.