水化温升抑制剂对混凝土性能的影响  

Influence of hydration temperature rise inhibitor on concrete performance

作　　者：侯敏 霍新 高超 夏京亮 王晶 冷发光 HOU Min;HUO Xin;GAO Chao;XIA Jingliang;WANG Jing;LENG Faguang(China Road&Bridge Corporation,Beijing 100011,China;China Academy of Building Research,Beijing 100013,China;National Engineering Research Center of Building Technology,Beijing 100013,China;Building Materials of CABR Co.Ltd.,Beijing 100013,China)

机构地区：[1]中国路桥工程有限责任公司,北京100011 [2]中国建筑科学研究院有限公司,北京100013 [3]国家建筑工程技术研究中心,北京100013 [4]建研建材有限公司,北京100013

出　　处：《新型建筑材料》2023年第3期12-15,共4页New Building Materials

基　　金：“十三五”国家重点研发计划项目(2017YFB0310001)。

摘　　要：水泥水化温升产生的温度应力是混凝土出现裂缝的主要原因,研究了不同掺量水化温升抑制剂对C50混凝土拌合物性能、混凝土绝热温升、抗压强度和抗氯离子渗透性能的影响规律。结果表明:水化温升抑制剂对混凝土拌合物流动性有一定影响,凝结时间大幅度延长,绝热温升可降低8%~29%;水化温升抑制剂延缓了胶凝材料的水化进程,使得混凝土的7 d抗压强度大幅降低,但不影响水泥和矿物掺合料的最终水化程度,56 d抗压强度较不掺时的降幅不大于10%;掺加水化温升抑制剂降低了混凝土的28 d抗氯离子渗透性能,但随着龄期的延长,对56 d抗氯离子渗透性能的降低幅度显著减小。The temperature stress caused by the temperature rise of cement hydration is the main cause of concrete cracks.In this paper,the effects of hydration temperature rise inhibitors with different contents on the properties of C50 concrete mixture,adiabatic temperature rise,compressive strength and resistance to chloride ion penetration were studied.The results show that the hydration temperature rise inhibitor has a certain effect on the fluidity of concrete mixture,the setting time is greatly prolonged,and the adiabatic temperature rise can be reduced by 8%~29%.It delays the hydration process of cementitious materials,and the 7 d compressive strength of concrete is greatly reduced,but does not affect the final hydration degree of cement and mineral admixtures,the 56 d compressive strength of concrete is less than 10%lower than that of concrete without hydration temperature rise inhibitor.The addition of hydration temperature rise inhibitor reduces the 28 d chloride ion permeability of concrete,however,as the extention of age,the reduce degree to 56 d chloride ion permeability of concrete is significantly lower.

关 键 词：水化温升抑制剂 凝结时间 抗压强度 抗氯离子渗透性 

分 类 号：TU528.042[建筑科学—建筑技术科学]