期刊
CEMENT AND CONCRETE RESEARCH
卷 35, 期 10, 页码 2026-2032出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2005.02.002
关键词
Ca3Al2O6; hydration; polymer; microstructure; soft X-ray transmission microscopy
The hydration of pure C(3)A (Ca3Al2O6) in calcium hydroxide-gypsum saturated solution was analyzed using soft X-ray microscopy. The images show the presence of at least two different types of ettringite crystals during the first 4 h of hydration. They differ in morphology and growing rate. When poly(ethylene-co-vinyl acetate) (EVA) is present, there is a significant change in the hydration kinetics and morphology of the hydration products. EVA particles inhibited or even prevented the formation of ettringite crystals during the early stage of hydration. A cloud of small, bright particles are observed concentrated around the hydrating C(3)A grains. The particles are most likely to be a product of reaction between EVA and inorganic species in solution. (c) 2005 Elsevier Ltd. All rights reserved.
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