The Study on the Early Age Cracking due to the Addition of Silica Fume into Concrete and the Trouble-Shooting Strategy

Abstract:

This study is mainly to investigate the early age cracking due to the addition of silica fume (SF) into concrete and to propose Densified Mixture Design Algorithm (DMDA) method as a trouble-shooting strategy. Specimens with different water-to-binder ratio (W/B) and silica fume content were prepared with ACI concrete (W/B = 0.23, 0.35 and 0.47; SF content = 0%, 10%, 20% and 30%) and DMDA concrete (W/B = 0.23, 0.35 and 0.47; coating paste thickness t = 5, 15 and 25 μm). Adding silica fume to the concrete system to replace part of cement may increase the crack intensity, and the rate of water absorption; but reduce the heat of hydration. DMDA method as a problem-shooting technique shows to have a better performance in reducing the crack intensities up to 41% with W/B = 0.23 and the better durability index than that of ACI method.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 824-829
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.824
• Online since: July 2011
• Authors: Chao Lung Hwang, Chun Tsun Chen, Le Anh Tuan Bui, Fondly Reymont Kurniawan
• Keywords: Coating Paste Thickness, Densified Mixture Design Algorithm, Early Age Cracking, Silica Fume (SF)

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