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Microstructure characters of cement emulsified asphalt composite mastics(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年03期
Page:
11-14
Research Field:
Publishing date:
2009-06-20

Info

Title:
Microstructure characters of cement emulsified asphalt composite mastics
Author(s):
WANG Zhen-jun; SHA Ai-min
School of Materials Science and Engineering,Chang’an University,Xi’an 710061,Shaanxi,China
Keywords:
road engineering;  cement emulsified asphalt composite mastic;  ratio of mineral filler to asphalt;  filler;  structure character;  micro analysis
PACS:
U414.75
DOI:
-
Abstract:
Some microtest instruments, such as scanning electron microscope (SEM), infrared spectroscopy (IR) and energy dispersive Xray analysis (EDXA), were adopted to analyze the cement emulsified asphalt composite mastics made from fillers with different lithology fillers, different cement types and different ratios of mineral filler to asphalt; microstructure character of cement emulsified asphalt composite mastics was put forward. The results indicate that the mastics is composed of grain particle made of mineral powder packed by asphalt and nonhydration cement particle, a fiber shape cement hydration product (C-S-H) gel, and CH crystal. In mastics, a space structure made of grain particle, C-S-H gel and free asphalt is formed. If the ratio of mineral filler to asphalt is 1.1, there is more C-S-H gels; the mastics structure is compacted and the pore distribution is uniform. The organic substances have no reaction to make new bonds with the inorganic compounds. Limestone filler, high strength cement and rational ratio of mineral filler to asphalt are helpful to improve micro structure of the composite mastics. 5 figs, 10 refs.

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Last Update: 2009-06-20