纤维素纤维自养护水泥砂浆塑性收缩行为的研究  

Plastic Shrinkage Behaviors of Internal Curing Mortar with Cellulose Fibers

作　　者：郭秀艳 马国金 

机构地区：[1]井冈山大学机电工程学院,吉安343009 [2]井冈山大学建筑工程学院,吉安343009

出　　处：《硅酸盐通报》2018年第1期337-341,共5页Bulletin of the Chinese Ceramic Society

基　　金：江西省吉安市科技支撑项目(吉市科字[2015]10号12;吉市科字[2015]10号18);井冈山大学自然科学科研项目(JZ14008);井冈山大学博士科研启动项目(JZB17006)

摘　　要：采用实验室自制的砂浆塑性收缩开裂装置,分别研究了不同掺量的吸水UF500纤维素纤维和再生纤维素纤维对水泥砂浆塑性收缩开裂行为的影响。结果表明,本实验条件下,无论掺加何种吸水纤维,随着掺入量的增多,砂浆的塑性收缩开裂情况明显减弱,当掺加量分别达到水泥质量的0.15%和0.2%时,UF500纤维素纤维和再生纤维素纤维可实现100%减缩,并延长水泥砂浆的初始塑性收缩开裂时间,提高砂浆的塑性收缩抗拉强度指标。A self-designed measuring device was used to study the effects of absorbed UF500 cellulose fiber and recycled cellulose fiber on the plastic shrinkage behaviors of mortar.The results show that the plastic shrinkage crack of mortar is much less pronounced with the dosage of the fiber wherever it is under this experimental condition.The plastic shrinkage crack can be inhibited 100% when the dosages of UF500 cellulose fiber and recycled cellulose fiber are 0.15% and 0.2%,respectively.Moreover,both of them can prolong the initial cracking time and improve the tensile strength of mortar.

关 键 词：UF500纤维素纤维 再生纤维素纤维 砂浆 塑性收缩行为 

分 类 号：TU528.572[建筑科学—建筑技术科学]