JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2010, Vol. 40 ›› Issue (6): 72-75.

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Experimental study and application of desulfurization gypsum-fly ash concrete for highway pavement

CHEN Yu, GAO Ying-li   

  1. School of Traffic and Transportation Engineering, Changsha University of Science ＆ Technology, Changsha 410114, China
  • Received:2010-05-14 Online:2010-12-16 Published:2010-05-14

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Abstract:

A new kind of active mineral admixture was produced by blending  desulfurization gypsum and fly ash, and adding some modifiers.  C30～C40 concretes were manufactured and  the main technical performances tested. The conclusions can be made that with desulfurization gypsum-fly ash more than 30％ of the total binder in mass, concrete shows no segregation, no bleeding and more excellent workability than that of ordinary concrete, with mechanical properties which meet the requirements for highway design, less than 450×10-6 drying shrinkage at 180d, and about 60％ of standard limit of wear mass loss as well as higher than D300 of freezingthawing resistance grade. Also, it was successfully applied in highway pavement construction of the experimental section of Tao Hua-yuan to Hua Yuan-xi Travel Highway, which showed obvious benefits for society and  economy as well as environmental protection.

Key words: desulfurization gypsum, fly ash, experimental study, highway engineering, concrete

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