Influence of Carbonization Process on the Mechanical Properties of Nano-MgO Modified Cement Soil

Wei Wang, Hang Zhou, Jian Li, Feifei Tao, Cuihong Li, Biao Qian and Ping Jiang
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Wei Wang: School of Civil Engineering, Shaoxing University, Shaoxing 312000, China
Hang Zhou: School of Civil Engineering, Shaoxing University, Shaoxing 312000, China
Jian Li: School of Civil Engineering, Shaoxing University, Shaoxing 312000, China
Feifei Tao: School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China
Cuihong Li: School of Civil Engineering, Shaoxing University, Shaoxing 312000, China
Biao Qian: Tongchuang Engineering Design Co. Ltd., Shaoxing 312000, China
Ping Jiang: School of Civil Engineering, Shaoxing University, Shaoxing 312000, China

Sustainability, 2021, vol. 13, issue 6, 1-19

Abstract: In order to explore the modification effect of carbonization time on nano-MgO-modified cement soil, unconfined compressive strength tests of nano-MgO-modified cement soil with carbonization times of 0 h, 6 h, 1 d, 2 d and 4 d were carried out. A method for normalizing the stress–strain curve was proposed, and the influence of nano-MgO content and carbonization time was investigated from the three aspects of compressive strength, peak strain and energy dissipation. The test results show the following: (1) The compressive strength of the modified cement soil can be significantly improved by adding 1.0% nano-MgO and after 1 d carbonization. (2) Under the same nano-MgO content, the peak strain of the modified cement soil after 2 d carbonization reaches the maximum, which can significantly increase its ductility. However, the nano-MgO content has little influence on the peak strain of the modified cement soil. (3) Under the same nano-MgO content, the energy dissipation rate of the modified cement soil after 1 d carbonization reaches the maximum, which can better resist the damage of external load.

Keywords: cement soil; nano MgO; carbonization process; compressive strength; energy dissipation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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