Effect of Nano-SiO<sub>2</sub> on Slump and Compressive Properties of Recycled Concrete with Rubber Powder

TU Yanping; CHENG Ziyang; CHEN Xuyong; ZHAN Xu

doi:10.13204/j.gyjzG21032609

Volume 52 Issue 2

Feb. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(2): 126-132

TU Yanping, CHENG Ziyang, CHEN Xuyong, ZHAN Xu. Effect of Nano-SiO2 on Slump and Compressive Properties of Recycled Concrete with Rubber Powder[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(2): 126-132. doi: 10.13204/j.gyjzG21032609

Citation:

TU Yanping, CHENG Ziyang, CHEN Xuyong, ZHAN Xu. Effect of Nano-SiO₂ on Slump and Compressive Properties of Recycled Concrete with Rubber Powder[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(2): 126-132. doi: 10.13204/j.gyjzG21032609

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Effect of Nano-SiO₂ on Slump and Compressive Properties of Recycled Concrete with Rubber Powder

doi: 10.13204/j.gyjzG21032609

School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China

Received Date: 2021-03-26
Available Online: 2022-06-30
Publish Date: 2022-02-20

Abstract

Abstract

The influence of Nano-SiO₂ (instead of cement) and rubber powder (instead of natural river sand) on compressive strength and slump of recycled concrete cured for 7 and 28 days was studied by the mass substitution method. Through the test results, it was found that the slump of recycled concrete increased with the increase of rubber powder proportion, and the slump of recycled concrete reached the maximum when the rubber powder proportion reached 5%. When adding nano-SiO₂, the slump of recycled concrete decreased with the increase of the Nano-SiO₂ content. When the proportion was 3%, the slump of recycled concrete was the smallest. When adding rubber powder, the 7th day compressive strength of recycled concrete decreased with the increase of rubber proportion, and the 28th day compressive strength increased when the rubber powder proportion was less than 5%. When nano-SiO₂ was added alone, the 7th day compressive strength of recycled concrete increased with the increase of Nano-SiO₂ proportion; when both of rubber powder and nano-SiO₂ were added together, it could not only make up for the decrease of rubber strength, but also restrain the slump deterioration after mixing with nano-SiO₂, offset the loss of strength by adding rubber powder, then, achieve a complementary effect. The microstructure, transition zone and hydration products of concrete were analyzed by scanning electron microscope.
- recycled concrete,
- rubber powder,
- nano-SiO₂,
- slump,
- compressive strength

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References(23)

References

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