硅酸盐通报2024，Vol.43Issue(4)：1388-1397,10.
西北大温差环境下温度对硫铝酸盐水泥砂浆抗压强度的影响
Effect of Temperature on Compressive Strength of Sulphoaluminate Cement Mortar in Large Temperature Difference of Northwest China
摘要
Abstract
To study the effect of temperature on the compressive strength of sulphoaluminate cement mortar as a repair material for shallow decay concrete in large temperature difference of northwest China,three different mix proportions,three temperature gradients(-25,25 and 80 ℃)and three time lengths(6,12 and 24 h)before and after modification were designed.Compressive strength of samples were tested,and micro properties were tested by scanning electron microscopy(SEM)and X-ray diffraction(XRD)methods.The results show that the failure modes of modified samples are better than that of original sample.With the elongation of time,the growth rates of compressive strength of modified samples at-25℃are greater than that of original sample.At 25℃,the compressive strength of three groups samples are similar and have slight reductions.At 80 ℃,the compressive strength of modified sample with 0.3％(mass fraction)water glass,0.1％(mass fraction)PP fiber and 0.4％(mass fraction)expander has the least reduction rate.Meanwhile,the prediction formulas of relative variation rate of compressive strength for this sample with time at different temperatures are established,which can provide some references for sulphoaluminate cement mortar as a repairing material for shallow decay concrete in large temperature difference of northwest China.关键词
硫铝酸盐水泥/水玻璃/聚丙烯纤维/UEA膨胀剂/西北大温差/温度/抗压强度Key words
sulphoaluminate cement/water glass/PP fiber/UEA expander/large temperature difference of northwest China/temperature/compressive strength分类
化学化工引用本文复制引用
马继树,杨淑雁..西北大温差环境下温度对硫铝酸盐水泥砂浆抗压强度的影响[J].硅酸盐通报,2024,43(4):1388-1397,10.基金项目
宁夏自然科学基金(2023AAC03129) （2023AAC03129）
