摘要
木纤维的加入可改善水泥基胶凝材料的抗拉强度,但只采用机械破碎及沸煮处理的木纤维对水泥基胶凝材料有缓凝、阻凝作用,阻碍了木纤维在水泥制品中的应用,为提升木质家具企业的木纤维利用率,从机械破碎的松木、杂木纤维的长径比着手,研究经碱法预处理的木纤维对水泥基胶凝材料水化进程的影响。结果表明:未预处理的杂木纤维只影响水泥早期水化热释放速率,对水泥水化热释放总量影响较小,未预处理的松木纤维具有明显的阻凝作用;采用Ca(OH)_(2)溶液浸泡可以有效降低木纤维对水泥水化的缓凝作用,与其他碱液浸泡相比,采用Ca(OH)_(2)浸泡可避免水泥胶凝体系引入其他物质。
The addition of wood fiber can improve the tensile strength of cement-based cementitious materials.However,most wood furniture enterprises only use mechanically broken and boiled wood fiber to retard and block cement-based products,which hinders the application of wood fiber in cement products.In order to improve the utilization rate of wood fiber in wood furniture enterprises,this paper studies the effect of wood fiber pretreated by alkali method on the hydration process of cement-based cementitious materials from the aspect ratio of mechanically broken pine and miscellaneous wood fiber.The results show that the unpretreated miscellaneous wood fiber only affects the early hydration heat release rate of cement,and has little effect on the hydration heat release of cement.The unpretreated pine fiber has obvious coagulation inhibition effect.Soaking with Ca(OH)_(2) solution can effectively reduce the retarding effect of wood fiber on cement hydration.Compared with other alkali solution soaking,soaking with Ca(OH)_(2) can avoid the introduction of other substances into the cement cementitious system.
作者
张佳阳
张吉秀
王猛
段赛红
高志杰
舒春雪
ZHANG Jiayang;ZHANG Jixiu;WANG Meng;DUAN Saihong;GAO Zhijie;SHU Chunxue(Beijing Building Materials Academy of Sciences Research,Beijing 100041,China;Beijing Passive Low-energy Building Engineering Research Center,Beijing 100041,China)
出处
《新型建筑材料》
2024年第7期44-47,59,共5页
New Building Materials
关键词
木纤维
碱法处理
水泥水化热
wood fiber
alkali treatment
cement hydration heat
