Renliang You

Institute of New Materials

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Yuetao Qiu

Institute of New Materials

Zhuojun Jiang

Institute of Process Engineering

Meng Xiangjie

Guizhou Electromechanical Research and Design Institute

Xinqi Guo

First Affiliated Hospital of GuangXi Medical University

Pan Zhang

Shanghai Jiao Tong University

Chen Xiaolu

Yuanqiang Guo

Nankai University

Yunhui Fang

Institute of New Materials

Zhuojun Jiang

China Population and Development Research Center

Fang Yunhui

Cooperative Institutions

Institute of New Materials

Chinese Academy of Sciences

Xiamen Institute of Building Research Group

Guizhou Electromechanical Research and Design Institute

Tianjin Special Equipment Supervision and Inspection Technology Research Institute

First Affiliated Hospital of GuangXi Medical University

Guangxi Medical University

Northeast Forestry University

Dalian Polytechnic University

Harbin Normal University

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Effect of reaction time on properties of TPEG type polycarboxylate superplasticizer

Journal of Physics Conference Series (2022)

Zhuojun Jiang Renliang You Yunhui Fang Yuanqiang Guo Tianxing Lin

Abstract The effects of dropping time and holding time on the properties of TPEG type polycarboxylate superplasticizer paste and concrete were studied with 20000l stainless steel reactor as production equipment, ammonium persulfate as initiator, sodium hypophosphite as chain transfer agent and reaction temperature of 60 °C. The experimental results show that within the experimental range, the dropping time has little effect on the initial dispersion effect of TPEG type polycarboxylate superplasticizer and has a great impact on the slump retention performance. The holding time has a great impact on the initial dispersion effect and slump retention effect of TPEG type polycarboxylate superplasticizer. The dropping time and holding time have little effect on the 3d, 7d and 28d concrete compressive strength of TPEG type polycarboxylate superplasticizer.

Superplasticizer

Ammonium persulfate

Hypophosphite

10.1088/1742-6596/2194/1/012017

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Research on the Influence of Different Flocculants on Concrete Performance

IOP Conference Series Earth and Environmental Science (2020)

Renliang You Yuetao Qiu Pan Zhang Zhifeng Pan

Abstract By adding different types and amounts of flocculants into concrete, the effects of different types and amounts of flocculants on the initial flow performance, slump retention performance and compressive strength of concrete at different ages were studied. The test results show that PAM-3 has the greatest influence on the performance of concrete. When the content of PAM-3 exceeds 0.48g/15L, the compressive strength of concrete will be reduced. When the content of PAM-1 and PAM-2 is less than 0.24g/15L, it has no obvious influence on concrete performance. When PAC content is less than 1.8g/15L, it has no obvious influence on concrete performance. Increasing the amount of concrete admixture can alleviate the adverse effect of flocculant on concrete to a certain extent.

Superplasticizer

10.1088/1755-1315/571/1/012144

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Effect of concrete viscosity on apparent quality of fair faced concrete

Journal of Physics Conference Series (2022)

Renliang You Pan Zhang Yuetao Qiu Qing Zheng

Abstract In this paper, concrete with different viscosity was prepared by adjusting the water binder ratio of concrete. The floating time of table tennis was used to characterize the viscosity of concrete, and the effect of concrete viscosity on the apparent quality of fair faced concrete was studied. The test results show that with the increase of concrete viscosity, the apparent porosity of concrete decreases first and then increases. When the water binder ratio is 0.37 and the floating time of table tennis is 40s, the appearance quality of concrete components is the best.

10.1088/1742-6596/2194/1/012018

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Study on Preparation of Low Sensitive and Stable Type Polycarboxylate Superplasticizer Small Monomers

IOP Conference Series Materials Science and Engineering (2019)

Zhuojun Jiang Renliang You Xinqi Guo

Acrylic acid and p-hydroxybenzenesulfonic acid were esterified with ethyl sulfonic acid as catalyst and hydroquinone as inhibitor for 3 hours at 90°C. Low sensitive and stable type polycarboxylate superplasticizer small monomers (P1) with double-layer dispersion structure was obtained after esterification. A low sensitive and stable type polycarboxylate superplasticizer (P-WD) can be obtained by using P1. The experimental results show that the synthesized P-WD has better adaptability to cement than PCE without P1, and better control of the time-dependent fluidity of cement paste.

Superplasticizer

Hydroquinone

Sulfonic acid

Acrylic acid

10.1088/1757-899x/631/2/022030

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Preparation of an extra high-concentration polycarboxylate superplasticizer

Renliang You

Through experiments,the influence of reaction temperature and time,chain-transfer agent and initiator systems on the dispersivity performance of the extra high-concentration polycarboxylate superplasticizer was researched.The results indicated that the optimal reaction conditions were as follows:H2O2∶Vc=4∶1(redox initiator system),1.5% dosage of hydrogen peroxide(mass of macromonomer),1.2% dosage of sodium phosphate(mass of macromonomer,used as a chain transfer agent),6% dosage of SMAS(mass of macromonomer),at room temperature(20～40 ℃) for 3 h,which can synthesize a high-performance polycarboxylate superplasticizer with extra high concentration(80%).When 0.20% dosage(converted into solid)of superplasticizer and 0.29 of W/C,the net paste fluidity can reach up to 285 mm,60 min net paste fluidity can be 288 mm,and 120 min net paste fluidity can be 282 mm with little loss.Meanwhile its concrete application performance is good,and water-reducing rate reaches 30%.

Superplasticizer

Macromonomer

Polyacrylic acid

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Effect of Early Strength, Retarding and Slump-retaining Components of Polycarboxylic Acid Admixture on Workability of Fresh Concrete

IOP Conference Series Materials Science and Engineering (2019)

Renliang You

Abstract The effects of the amount of early strength components, retarding components and slump-retaining components of concrete admixtures on initial fluidity, slump loss and initial setting time of concrete are compared through experiments, so as to adjust the workability of fresh concrete more pertinently.

Superplasticizer

Concrete slump test

10.1088/1757-899x/631/2/022047

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異なるタイプのポリカルボン酸減水剤の高強度コンクリートへの応用【JST・京大機械翻訳】

Zhuojun Jiang Fang Yunhui Chen Xiaolu Renliang You Meng Xiangjie

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