Study on the Effect of Condensate-Type and Copolymer-Type Combined Superplasticizers on Hydration of Cement

Yun Feng Pan; Ya Qing Jiang; Si Jia Zhang

doi:10.4028/www.scientific.net/KEM.703.360

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 703Study on the Effect of Condensate-Type and...

Study on the Effect of Condensate-Type and Copolymer-Type Combined Superplasticizers on Hydration of Cement

Abstract:

For the limitation of single-component superplasticizer, condensate-type and copolymer-type combined superplasticizers were prepared. The adsorption of compound superplasticizers on cement paste was tested by Total Organic Carbon (TOC) measurement. Influences of superplasticizers on early hydration process of cement and Organo-mineral phase formation were studied by X-Ray Diffraction Analysis (XRD), Scanning Electron Microscope analysis (SEM) and so on. The results show that owing to the electrostatic repulsion and steric effect cooperative mechanism, condensate-type and copolymer-type combined superplasticizers reduce the superplasticizers adsorption in cement minerals and its hydration products surface, delay the process of hydration of C₃A, form Organic-Layered double hydroxides (LDH), increase the early chemical shrinkage and promote the growth of cement early hydration and Ettringite

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Advanced Materials and Engineering Materials V

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Periodical:

Key Engineering Materials (Volume 703)

Pages:

360-364

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.703.360

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Online since:

August 2016

Authors:

Yun Feng Pan, Ya Qing Jiang*, Si Jia Zhang

Keywords:

Civil Engineering Materials, Combined Superplasticizer, Mechanism, Orgno-Mineral Phase

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