Effect of Material Properties on Plastic Shrinkage of Ultra-Fine Sand Pumping Concrete

Abstract:

The influence of mixing fly ash, admixture(including pumping agent, water reducing agent, air-entraining agent), polypropylene fiber on plastic shrinkage of ultra-fine sand pumping concrete by using slab test in this paper. The results show that mixing fly ash can significantly reduce plastic crack area of ultra-fine sand pumping concrete, and plastic crack area begins to reduce slowly when the content of fly ash is up to 20%; When the content of water reducing agent is between 0% and 1.5%, inhibition effects of water reducing agent on plastic shrinkage of ultra-fine sand pumping concrete increase gradually with the content., and the optimum content of water reducing agent is 0.75%; Compared with the water reducer, the effect of mixing pumping agent or air-entraining agent is better; Mixing polypropylene fiber can reduce plastic crack area of ultra-fine sand pumping concrete, slenderizing the crack, and the effect becomes greater with the content of polypropylene fiber.

• Periodical: Advanced Materials Research (Volumes 150-151)
• Pages: 588-593
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.150-151.588
• Online since: October 2010
• Authors: Yuan Yuan Zhang, Zong Ke Lou, Xiang Bin Zhang
• Keywords: Admixture, Fly Ash (FA), Plastic Shrinkage, Polypropylene (PP) Fiber, Ultra-Fine Sand Pumping Concrete

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