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Experimental Study on Fast-pass Concrete of High-grade Pavement

Author: ZhangWanHui
Tutor: WangZeMin
School: Chongqing Jiaotong University
Course: Materials Science
Keywords: Fast pass concrete Early strength mechanism Factors affecting the strength Orthogonal design Road performance
CLC: U414
Type: Master's thesis
Year: 2010
Downloads: 52
Quote: 0
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Abstract


Since the 1990s, our country built a large number of cement concrete pavement highway. After nearly two years of operation, many roads have suffered serious diseases. Impede the normal traffic. As low early strength portland cement concrete. Use of this material on the broken concrete pavement repairs. Usually closed or semi-closed to traffic. To ensure adequate construction and maintenance time, which will often lead to serious traffic jam. Resulting in very major economic losses. This topic is based on this, the proposed fast pass concrete technology to achieve rapid opening of the concrete pavement maintenance purposes. In this paper, early strength superplasticizer admixture of concrete pavement faster ways to achieve the purpose of communication. As soon affect many factors through the concrete strength, and fast through concrete with high early strength, it is also required to reduce as much as possible the loss of its late strength. This paper aims to identify the impact of fast pass concrete strength factor level, preferably a suitable admixture of the subject type and reasonable requirements of the fast-pass mix concrete factors, and through its road performance test, the final preparation of a can achieve fast traffic, but also has a higher late strength fast pass concrete. The main findings are: ① a quick overview of the performance requirements through the concrete, and admixtures, concrete materials for screening. ② the use of fast single factor influencing factors one by one through the concrete strength analysis, the fast pass each factor on the strength of concrete were investigated. ③ Through orthogonal test method analyzes admixtures, curing temperature, and other factors on quick sand ratio through concrete strength of every age laws, and its wear resistance and shrinkage test, theoretically get early strength, late strength loss factors fast through concrete mix. ④ introduce fast pass concrete pavement construction technology, and use of the above factors derived from fast-pass mix concrete paving test road test road test results showed that: the preparation of the concrete to fully meet the performance requirements of fast through concrete. Experimental research paper faster through concrete application provides a theoretical and experimental basis, will soon pass the concrete in the concrete paving and Old Concrete Pavement Maintenance of a certain reference.

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