Publication Date:
2018-04-09
Description:
The self-designed vertical dial gauge holder was used in this paper. The influence factors of autogenous shrinkage of UHPCC, which include water-binder ratios, binder-aggregate ratios, sand ratios and fraction process of steel fiber, were mainly studied. The mechanism of autogenous shrinkage is explored by thermal analysis and pore structure analysis techniques. The results show that autogenous shrinkage of UHPCC increases with the decreasing of water-binder ratio. The autogenous shrinkage of 60d increases by 14.4% and 25.4%, when water-binder ratio decreases from 0.24 to 0.20, 0.16, respectively. Coarse aggregate has great positive effects on the autogenous shrinkage of UHPCC. Fine steel fibers have no obvious effects on the autogenous shrinkage of UHPCC. Non-evaporable water content decreases with the decreasing of water-binder ratio, which is positive effect on the autogenous shrinkage. However, the volume fraction of pores with the size range from 5 to 50 nm increases with t...
Print ISSN:
1757-8981
Electronic ISSN:
1757-899X
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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