摘要
研究了纳米纤维素(CNFs)对混凝土流变性能、水化热、力学性能、抗氯离子渗透性能和抗冻性能的影响,并采用扫描电子显微镜(SEM)观察了混凝土基体的微观结构。结果表明:CNFs的掺入增大了水泥浆体的屈服应力和塑性黏度,抑制了水泥的早期水化,促进了水泥的后期水化;随着CNFs掺量的增加,混凝土的抗压、抗折强度增大;CNFs的掺入改善了基体的微观结构,提高了混凝土的抗氯离子渗透性能和抗冻性能。
The effects of nano cellulose(CNFs)on the rheology,heat of hydration,mechanical properties,resistance to chloride ion penetration and frost resistance of concrete were studied,and the microstructure of the matrix was observed by scanning electron microscope(SEM).The results show that the incorporation of CNFs increases the yield stress and plastic viscosity of cement paste,inhibits the early hydration of cement,and promotes the later hydration of cement.With the increase of CNFs content,the compressive strength and flexural strength of concrete increase.The incorporation of CNFs improves the microstructure of the matrix,so as to improve the resistance to chloride ion penetration and frost resistance of concrete.
作者
刘帅
刘巧玲
杨立华
聂苗苗
张姣
LIU Shuai;LIU Qiao-ling;YANG Li-hua;NIE Miao-miao;ZHANG Jiao(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Shandong Jianzhu University Engineering Appraisal and Reinforcement Research Institute Co.,Ltd.,Jinan 250101,China)
出处
《混凝土与水泥制品》
2022年第11期54-58,共5页
China Concrete and Cement Products
基金
国家自然科学基金项目(52078282)
山东省重点研发计划(重大科技创新工程)项目(2021CXGC011204)。
关键词
纳米纤维素
混凝土
水化热
力学性能
耐久性能
Nano cellulose
Concrete
Hydration heat
Mechanical property
Durability
