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Title: Influence of paste thickness on the coated aggregates on properties of high-density sulphoaluminate cement concrete
Authors: Sun, K
Zhou, X
Gong, C
Ding, Y
Lu, L
Keywords: Sulphoaluminate cement concrete;Fuller curve;Densified mixture design algorithm;Coating thickness;Durability
Issue Date: 2016
Publisher: Elsevier
Citation: Construction and Building Materials, 115: pp. 125–131, (2016)
Abstract: An improved method for the densified mixture design algorithm and Fuller curve were used to design high-density sulphoaluminate cement concrete (HDSC). The performance of HDSC is significantly influenced by the paste thickness on the coated aggregates. Sulphoaluminate cement concrete mixtures containing aggregates coated with 3 different paste thickness of t=10μm, 20μm, and 30μm and water-binder ratios (W/B) of 0.25, 0.30 and 0.35 were prepared. The results of experiments show that paste thickness on the coated aggregates significantly influences the mechanical properties and durability of HDSC. With the increase of paste thickness, the compressive strength is increased, but the electrical resistivity is decreased, particularly at the early ages of 1 and 3 days. The sulfate corrosion resistance coefficients of HDSC are larger than 1.0, the total porosity can be less than 7%, and the micropore (i.e. with pore size less than 20nm) can be larger than 70%.
ISSN: 0950-0618
Appears in Collections:Dept of Mechanical Aerospace and Civil Engineering Research Papers

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