PREPARATION OF CEMENT MORTAR REINFORCED BY MODIFIED MICROFIBER IN A TURBULENT MIXER

• Main Author: Belova Tat’yana Konstantinovna
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2016-03-01
• Series: Vestnik MGSU
• Subjects: modified microfiber; cement mortar; disperse reinforcement; turbulent mixer; technological parameters
• Online Access: http://vestnikmgsu.ru/index.php/archive/article/download/3105

The improvement of the structure of cement mortars on micro- and nanolevels by means of disperse reinforcement by modified microfibers promotes the considerable improvement of operational characteristics of the designs made on their basis. However, the absence of the developed technology of preparing the cement mortars reinforced by the modified microfiber providing the uniform distribution of the microfibres in volume of a composite constrains the widespread introduction of such solutions in the construction practice. The results of the researches of the technological parameters of preparing the microfiber reinforced cement mortars in the turbulent mixer are presented in article. The results of the production experiment on determining the bending durability are reflected as well as the variation coefficient of the durability of the reinforced samples prepared by means of the turbulent mixer. The results of the influence of the water-cement relation of the mortar mix and influence of the time of mixing the components in the turbulent mixer on change of mobility of the mix and strength characteristics of the hardened solution are presented. The results of the tests indicated the efficiency of preparing cement mortar reinforced by modified microfiber in the turbulent mixer. The reinforced samples are characterized by the increased bending durability and high uniformity of the strength characteristics. In case of turbulent mixing of the components of mortar mix its mobility increases from 5 to 25% in comparison with the mix prepared manually. The time of mixing the components in the turbulent mixer has an impact on the strength characteristics of the fiber reinforced solution. The optimum time of mixing the components contributes to a certain water-cement relation of the mortar mix. Therefore, the preparation of the cement mortar reinforced by the modified microfiber in the turbulent mixer is characterized by high efficiency and productivity, the strength and technical characteristics of the solution increase.