摘要
为研究微晶纤维素(MCC)与氯化钾(KCl)对砂浆耐高温性能影响,试验分析了8组配合比砂浆不同温度下的质量损失率、超声波脉冲速度(UPV)、红外光谱图(FTIR)、扫描电子显微镜(SEM)观测图和抗压强度。试验结果表明,常温下微晶纤维素砂浆的强度随着微晶纤维素的掺量先升后降,常温下微晶纤维素的最佳掺量为水泥质量的0.4%;在高温下MCC的掺入反而降低砂浆试件的抗压强度。试验结果还表明KCl的掺入降低砂浆试件常温下的抗压强度,却可以延缓砂浆试件高温下的强度劣化。尽管MCC与KCl的掺入无法提升砂浆高温下的抗压强度,然而MCC与KCl的复掺却提升了砂浆试件高温下的抗压强度。
In order to study the influence of microcrystalline cellulose(MCC)and potassium chloride(KCL)on the high temperature resistance of mortar,the mass loss rate,ultrasonic pulse velocity(UPV),infrared spectroscopy(FTIR),scanning electron microscopy(SEM)graph and compressive strength of 8 groups of mixed mortar at different temperatures were analyzed in this experiment.The test results show that the strength of microcrystalline cellulose mortar increases first and then decreases with the dosage of microcrystalline cellulose at room temperature.The optimal dosage of microcrystalline cellulose at room temperature is 0.4%of the mass of cement.At high temperature,the addition of MCC decreases the compressive strength of mortar specimen.The test results also show that the addition of KCl reduces the compressive strength of mortar specimens at normal temperature,but can delay the strength deterioration of mortar specimens at high temperature.Although the addition of MCC and KCl cannot improve the compressive strength of mortar at high temperature,the combination of MCC and KCl improves the compressive strength of mortar specimens at high temperature.
作者
刘炽豪
陈嘉健
夏勇
李子宏
郑孙博
LIU Chi-hao;CHEN Jia-jian;XIA Yong;LI Zi-hong;ZHENG Sun-bo(School of Transportation,Civil Engineering&Architecture,Foshan University,Foshan 528225,China)
出处
《佛山科学技术学院学报（自然科学版）》
CAS
2021年第6期63-70,共8页
Journal of Foshan University(Natural Science Edition)
关键词
微晶纤维素
氯化钾
耐高温性能
抗压强度
microcrystalline cellulose
potassium chloride
high temperature resistance
compressive strength
