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Mathematical Problems in Engineering
Volume 2014, Article ID 183209, 15 pages
Research Article

A New Safety Factor Prediction Model for Mass Concrete Surface Cracking in Early Age

1College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
2School of Civil Engineering, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907, USA
3Zhoushan Financial Project Budget Audit Center, Zhoushan Finance Bureau, Zhoushan 316021, China

Received 6 December 2013; Accepted 4 February 2014; Published 18 March 2014

Academic Editor: Fei Kang

Copyright © 2014 Sheng Qiang and Min-zhi Liu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The temperature difference between mass concrete inside and outside is an important index to prevent the structure surface cracking, but the definition and the application criterion are not very clear till now. In this paper, the surface concrete temperature spatial gradient in 0.5 m deep is found as a more reasonable and feasible index. Then a new model, which can be used to calculate the surface safety factor simply, is deduced in three steps. First, a basic model is created under the simplest boundary condition. Then the feasibility of the basic model is analyzed under different boundary conditions and the model is improved. At last, according to the comparison of different concrete materials, the improved model is calibrated further. With the help of the proposed model, the surface safety factor can be adjusted by observing and controlling the temperature spatial gradient dynamically, which will bring convenience to designer and constructor.