摘要
采用正交试验的方法研究了以水镁石纤维为增强材料的新型外墙保温砂浆制备工艺技术问题。研究发现,纤维规格对砂浆抗压强度、抗折强度及密度均有较大影响,珍珠岩用量对砂浆导热系数影响最大,而纤维用量是线收缩率的主要影响因素。水镁石纤维保温砂浆的最佳水平搭配为:珍珠岩用量为水泥量的1.1倍,采用X规格纤维,纤维用量为水泥量的4%。在研究的三个规格水镁石纤维中,X型的纤维对砂浆的强度最有利,对应的砂浆流动性较大,砂浆硬化体密度也较大,线收缩率最小。随纤维用量增加,砂浆的强度和导热系数增加,干密度先上升后下降,线收缩率先减小后增加。随珍珠岩用量增加,砂浆的强度和导热系数降低,线收缩率增加,干密度先下降后上升。纤维规格对砂浆性能的影响与纤维的长度分布有关,纤维过长或过短,均不利于纤维对砂浆增强作用的发挥。
Adopted the method of orthogonal test, the manufacture process and technology of a new-type insulation mortar which is used the brucite fiber as a reinforcing material are discussed. The research indicates that fiber types have greater impact on mortar compressive strength, flexural strength and density, perlite dosage is the biggest influence on mor- tar thermal conductivity, and the fiber content is the main factor affecting the linear shrinkage rate. The appropriate mix of the brucite fiber insulation mortar： perlite-to-cement ratio is 1.1, X-type fiber, and the fiber content of cement volume is 4%. In the research of the three types brucite fiber, X fiber is most favorable to mortar strength, the corresponding mortar fluidity is great, bulk density is also bigger and the linear shrinkage rate is minimum. With the fiber dosage increase, the strength and thermal conductivity increase, dry density first increases and then decreases, linear shrinkage first decreases and then increases. With the perlite dosage increase, the strength and thermal conductivity decrease, linear shrinkage in- creases, dry density first decreases and then increases. Fiber length greatly influences on mortar performances： too long or too short fiber are not conducive to its reinforced role on mortar.
出处
《混凝土与水泥制品》
北大核心
2014年第8期66-70,共5页
China Concrete and Cement Products
基金
陕西省基金项目(2013JM7012)
中央高校基金项目(CHD2010ZY015)
关键词
水镁石纤维
建筑保温
正交试验
砂浆
Brucite fiber
Building insulation
Orthogonal test
Mortar
