Effects of Structure Characteristics of Fly Ash on Performance of Ready-Mixed Concrete

Abstract:

Effects of structural characteristics of two different types of fly ash on performance of ready-mixed concrete were studied.Results indicated that, comparing with fly ash containing round spherical micro-Pearl 80% around , fly ash containing round spherical micro-Pearl below 20% will reduced work performance of pre-mix concrete clearly, water requirement increases 16% around, slump loss 0.5h for 100mm around, 1h for 140mm around, and because needed using excessive of pumping agent and makes setting time of concrete extended. Major accident hazards exist in actual pumping concrete. Respectively 40% two types of fly ash cement hydration morphology comparative studies showed that, mixed with fly ash containing round spherical micro-Pearl below 20% ,hardened cement paste with high porosity, density is low, such ash failed to improve performance of cement matrix.

• Periodical: Applied Mechanics and Materials (Volumes 584-586)
• Pages: 1224-1228
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.584-586.1224
• Online since: July 2014
• Authors: Xiao Yan Guo, Run Xia Hao
• Keywords: Fly Ash (FA), Performance, Ready-Mixed Concrete, Structural Characteristic

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