摘要
裂缝是混凝土与砂浆应用中存在的重大问题。不少学者对普通硅酸盐水泥砂浆的收缩裂缝问题进行了大量研究,但纤维的种类、掺入量,以及纤维应当满足的物化性质等尚未形成定论。本文针对加入了脱硫石膏、矿粉等矿物掺合料的普通硅酸盐水泥砂浆,研究了纤维的尺寸、形状及掺入量对砂浆性能的影响。
The cracking is a major problem in the applica-tion of concrete and mortar. There are many studies on the cracking and auto-shrinkage of ordinary Portland cement mor-tar. Based on the discussion above, the subject mainly does the following studies for the ordinary Portland cement mortar which mixed with gypsum, slag and other mineral admixtures： the effects of the size, shape and incorporation of the fiber on the properties of the mortar;The results show that： ①Stirring methods have the greater effect on the characteristics of the mortar. Compared with manu-al stirring, on the one hand, the mechanical stirring can greatly reduce the ratio of water/ mixture; on the other hand, it can make the mortar more evenly, so as to enhance the strength of mortar, to avoid segregation, settlement and so on; ②When gypsum∶mineral powder∶calcium oxide∶potassium = 54∶23∶1. 5∶0. 9, and the ratio of water/mixture is between 0. 31 to 0. 32, the properties of the mortar, such as the initial and final setting time of the mortar, flexural strength and the ratio of compressive strength/ flexural strength etc. , are in line with the landmark DB11T537-2008 and DB31T366-2006 requirements.
出处
《四川建材》
2013年第6期57-58,61,共3页
Sichuan Building Materials
关键词
砂浆
纤维
抗裂性
矿物掺合料
外加剂
凝结时间
Polypropylene Fiber
Mortar
Anti-Crack
Mineral Admixture
Admixture
Setting Time
