Study on Alkali Reduction Effect of SAP on Cementitious Composites

Wenxing Xu; Shuai He; Yangyi Zhu

doi:10.54097/gbnb0m64

Authors

Wenxing Xu
Shuai He
Yangyi Zhu

DOI:

https://doi.org/10.54097/gbnb0m64

Keywords:

SAP; pH; Mechanical Properties; Cement.

Abstract

In order to improve the high alkalinity environment inside the cementitious composites, the effect of SAP doping on the pH value and compressive strength of cement slurry was investigated by doping Super Absorbent Polymer (SAP). The test results show that SAP can reduce the pH value of cementitious composites at 28d to a certain extent; the pH value of cementitious composites at 28d is significantly reduced when SAP doping is 0.3%, and the compressive strength is improved compared with that of the control group; SAP particles will form cracks with the middle of the cement matrix after the release of water to reduce the alkaline material outflow from the cement matrix, which will make the pH value of SAP specimens reduced.

Downloads

Download data is not yet available.

References

Ting Gao :Research on alkali reduction technology of ecological porous concrete[D],Central South Forestry University of Science and Technology,China,2017.

W X H, Y Z Li, H Peng. Experimental Study on Improvement Mechanism of Silane Emulsion on Acid Rain Corrosion of Green Ecological Concrete[J]. Science of Advanced Materials, 2020, 12(6): 873-883.

Jin Huang, Jiefa Qin, Chao Chen, et al. Experimental study on the performance of supersulfate cement vegetated porous concrete[J]. Concrete and cement products. 2020(10):5.

Jianguo Chen, Ruoyu Li, Xiaobin She, et al. Experimental study and application research on the planting of recycled aggregate planting concrete modified with phenylpropylene emulsion[J]. New Building Materials. 2021, 48(6):6.

Waiching Tang, EhsanMohseni, Zhiyu Wang. Development of vegetation concrete technology for slope protection and greening [J]. Construction and Building Materials, 2018,179: 605-613.

Justs J, Wyrzykowski M, Bajare D,et al. Internal curing by superabsorbent polymers in ultra-high performance concrete [J]. Cement and Concrete Re- search.2015,(76):82-90.

Rui He, Yawen Tan, Cheng Xue, et al. Research progress of using high water-absorbent resin as an internal curing agent for concrete[J]. China Science and Technology Paper,2019,14 (4): 464-470.

Peihua Zhong: Effect of highly absorbent resin (SAP) on the self-shrinkage property of high-strength concrete and its action mechanism[D]. Chongqing University, China,2015.

Bjo A, Ajb B , Wpb C . Early-age and long-term strength development of high-performance concrete with SAP - ScienceDirect[J]. Construction and Building Materials, 267.

Zhenlin Zhang: Research on the effect and mechanism of high water-absorbent resin on the early shrinkage reduction of high-strength concrete[D]. Tsinghua University, China,2013.

Liu J, Farzadnia N, Shi C. Microstructural and micromechanical characteristics of ultra-high performance concrete with superabsorbent polymer (SAP)[J]. Cement and Concrete Research, 2021, 149:106560-.