Experimental Research on Mechanical Properties of Recycled Concrete Immersed in Chloride Solution

ZHOU Jinzhi; FU Tiantian; SHUANG Ziyang; ZHOU Chenxu; ZHOU Yadong

doi:10.13204/j.gyjzG20101007

Volume 53 Issue 6

Jun. 2023

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ZHOU Jinzhi, FU Tiantian, SHUANG Ziyang, ZHOU Chenxu, ZHOU Yadong. Experimental Research on Mechanical Properties of Recycled Concrete Immersed in Chloride Solution[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 187-193. doi: 10.13204/j.gyjzG20101007

Citation:

ZHOU Jinzhi, FU Tiantian, SHUANG Ziyang, ZHOU Chenxu, ZHOU Yadong. Experimental Research on Mechanical Properties of Recycled Concrete Immersed in Chloride Solution[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(6): 187-193. doi: 10.13204/j.gyjzG20101007

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Experimental Research on Mechanical Properties of Recycled Concrete Immersed in Chloride Solution

doi: 10.13204/j.gyjzG20101007

1. College of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China;
2. The First Company of China Eighth Engineering Bureau Ltd., Guangzhou 510700, China;
3. State Key Laboratory for Health and Safety of Bridge Structures, Wuhan 430034, China

Received Date: 2020-10-10
Available Online: 2023-08-18

Abstract

Abstract

The specimens of concrete (C), recycled concrete (RC), steel fiber reinforced recycled concrete (SFRC) and silicon carbide recycled concrete (SiCRC) at different soaking ages were studied by compression test and splitting tensile test. Four types of standard concrete cube test blocks were immersed in a NaCl solution with a mass fraction of 5%. Soaking time was 0 d, 30 d, 60 d and 90 d, then finished the test. The mechanical properties of recycled concrete such as RC、SFRC、SiCRC were compared with ordinary concrete, the relations between the compressive strength and splitting tensile strength of different types of concrete with age were obtained by fitting the test data, and the influence mechanism of chloride salt immersion at different ages on recycled concrete was analyzed.The results showed that the compressive strength and splitting tensile strength of C,RC,SiCRC and other concrete increased with the increase of chlorine salt immersion age, while the strength performance of SFRC concrete was opposite. The color of SFRC specimens after being subjected to chlorine salt immersion was deepened and the surface was corroded. There was no obvious change in other types of concrete specimens, which indicated that SiCRC、RC and C were more suitable for chlorine salt environment than SFRC.
- recycled concrete,
- steel fiber,
- silicon carbide,
- different soaking age,
- experimental study,
- nonlinear fitting

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References(21)

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