Study on the Relationship between Strength and Water-Cement Ratio for the EPS Silt Light-Weight Soil Based on Gray Verhulst Model

Yong Feng*
School of Civil Engineering, Henan University of Technology, Zhengzhou, Henan, 450001, China.

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© 2015 Yong Feng;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


PS silt mixed soil is a high quality synthetic fill material made of foam material and sludge wasted. This paper indicates according to the test results and the previous studies that: the intensity of light-weight soils is increasing as the grey water ratio increases, and when the gray water ratio reaches a certain value, the strength of the growth rate is not large. Therefore, the research of the relationship of its strength and water-cement ratio for providing accurate design parameters of soil particles lightweight soil is very important. According to existing research results, a number of samples were made to study the relationship between strength and water-cement ratio, then the analyzed curves were obtained. In this paper, based on the gray Verhulst model, the variation regulation between the strength and water ratio was fitted. The study showed that the fitted curve was similar with the measured curve. It is found that the measured curves can be derived from fitted curve available, the related research can give good references for construction of EPS silt light-weight soil.

Keywords: EPS silt light-weight soil, fitted curve, gray verhulst model, strength, water-cement ratio.