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Pro083

Prediction model on mechanical strength of mortar at ultra low temperature



Author(s): Zhengwu Jiang, Zilong Deng, Zhenping Sun, Haiyan Tang, Zhenghong Yang
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1014 - 1024
Total Pages: 10
Language: English


Abstract: 
In this paper, strength development law of mortars with different water to cement ratios at ultra low temperature was analyzed using nonlinear least square method, and the prediction model on strength development of mortar at ultra low temperature was proposed. Based on the proposed prediction model, strength development laws of high strength mortar (HM) with different curing time and mortars with different moisture content and water to cement ratio of 0.31, 0.4, 0.5 and 0.6 at ultra low temperature were verified. The results show that the fitting coefficients are up to water to cement ratio. It is quantitatively verified that the influence of moisture content on flexural strength of mortar at ultra low temperature is higher than that on compressive strength. It is verified that given moisture content m and curing time of ultra low temperature t, the predication model of strength development of mortar can be expressed as σt = σ₀ + (A(m-mc)2 +C)(1-exp(t/B))


Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00