Hydration kinetics of Portland cement in the presence of vinyl acetate ethylene latex stabilized with polyvinyl alcohol
Source abstract
Abstract
Three vinyl acetate ethylene (VAE) latices and incorporated polyvinyl alcohol (PVOH) were investigated. Two of the VAE latices were stabilized by PVOH, while the third was stabilized with an anionic surfactant. The influence of VAE and PVOH on cement hydration was studied by means of isothermal heat flow calorimetry, ICP-OES and in situ XRD measurement. All of the latices prolonged the induction period with an increase in the polymer/cement ratio, whereas the latex stabilized by PVOH hardly influenced the hydration of the silicate phase. Instead, a strong secondary exothermic peak was observed. Based on the in situ XRD analysis, the peak was attributed to the rapid formation of ettringite. Furthermore, the concentration of SO42− in the pore solution was found to have reduced in the presence of polymers in the first hours of the hydration.
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Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovative concrete reinforcement materials · Magnesium Oxide Properties and Applications
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References (47)
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