Sensitivity Evaluation Method of Polycarboxylate Superplasticizer on Aggregate Adsorption and Water Consumption

DOI: https://doi.org/10.62517/jcte.202506207

Author(s)

Jinfeng Zhao1, Jiaqi He2,*

Affiliation(s)

1School of Information Engineering, Xi'an FANYI University, Xian, Shaanxi, China 2State Key Laboratory of Engineering Materials for Major Infrastructure, Sobute New Materials Co., Ltd., Nanjing, Jiangsu, China *Corresponding Author

Abstract

The dosage of polycarboxylate superplasticizer (PCE) is significantly affected by the content of sand and gravel aggregate mud powder and the fluctuation of water content. PCE with low sensitivity has better adaptability to raw materials. In order to evaluate the sensitivity of PCE, the methylene blue (MB) was used to characterize the adsorption capacity of manufactured sand, and the variation of PCE dosage with MB and water consumption was explored. Taking PCE-1 as an example, a mathematical model of the amount of PCE-1 changing with MB and water consumption was established. The adsorption coefficient a and the water consumption sensitivity coefficient w were used as the key parameters to evaluate the sensitivity of PCE. The lower the a, the lower the adsorption sensitivity of PCE, and the lower the w, the lower the water consumption sensitivity of PCE. The adsorption coefficients a of PCE-1 ~ PCE-4 were 1.1, 1.7, 1.7, 0.7, and the water consumption sensitivity coefficients w were 3.3, 4.0, 6.7, 5.0, respectively. Comprehensive comparison shows that PCE-1 has better adaptability to raw materials.

Keywords

Polycarboxylate Superplasticizer; Manufactured Sand; Adsorption; Sensitivity Evaluation

References

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