Development of High-performance Polycarboxylic Acid Shrinkage-reducing Materials (Ⅳ)——Integrative Estimate of High Polymer (HP-SRA) on Performance of Pumping Concrete
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TU528.042

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    Abstract:

    The influence of high polymer (HP-SRA) on workability, mechanical property, volumestability, early-age cracking performance and chloride ion diffusivity of pumping concrete are comparatively investigated. The results show that HP-SRA has better water-reducing effect and slump in pumping concrete mixture. HP-SRA hasn’t a certain negative effect on the compressive strength, flexural strength and spliting strength of pumping concrete. HP-SRA can obvoiously reduce the drying shrinkage and early-age autogenous shrinkage of pumping concrete, and early-age crack resistance and chloride ion diffusivity of pumping concrete are reinforced drastically or improved efficiently.

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History
  • Received:March 29,2015
  • Revised:April 30,2015
  • Adopted:May 05,2015
  • Online: August 12,2015
  • Published:
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