会议论文详细信息
3rd International Conference on Innovative Materials, Structures and Technologies
Reduction of the capillary water absorption of foamed concrete by using the porous aggregate
Namsone, E.^1 ; Sahmenko, G.^1 ; Namsone, E.^1 ; Korjakins, A.^1
Riga Technical University, Department of Building Materials and Products, Institute of Materials and Structures, Kalku str. 1, Riga
LV-1658, Latvia^1
关键词: Capillary water absorption;    Granular aggregates;    High temperature;    Physical and mechanical properties;    Porous aggregates;    Preparation process;    Water absorption capacity;    Zero temperatures;   
Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/251/1/012030/pdf
DOI  :  10.1088/1757-899X/251/1/012030
来源: IOP
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【 摘 要 】

The article reports on the research of reduction of the capillary water absorption of foamed concrete (FC) by using the porous aggregate such as the granules of expanded glass (EG) and the cenospheres (CS). The EG granular aggregate is produced by using recycled glass and blowing agents, melted down in high temperature. The unique structure of the EG granules is obtained where the air is kept closed inside the pellet. The use of the porous aggregate in the preparation process of the FC samples provides an opportunity to improve some physical and mechanical properties of the FC, classifying it as a product of high-performance. In this research the FC samples were produced by adding the EG granules and the CS. The capillary water absorption of hardened samples has been verified. The pore size distribution has been determined by microscope. It is a very important characteristic, specifically in the cold climate territories-where temperature often falls below zero degrees. It is necessary to prevent forming of the micro sized pores in the final structure of the material as it reduces its water absorption capacity. In addition, at a below zero temperature water inside these micro sized pores can increase them by expanding the stress on their walls during the freezing process. Research of the capillary water absorption kinetics can be practical for prevision of the FC durability.

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