Effects of mineral admixtures and additional gypsum on the expansion performance of sulphoaluminate expansive agent at simulation of mass concrete environment
作者： Ge Zhang , Guoxin Li
DOI: 10.1016/J.CONBUILDMAT.2016.03.131
关键词: Ettringite 、 Compressive strength 、 Materials science 、 Gypsum 、 Composite material 、 Mass concrete 、 Curing (chemistry) 、 Ground granulated blast-furnace slag 、 Shrinkage 、 Fly ash
摘要: Abstract Shrinkage cracks are easily occurred in mass concrete. To compensate the shrinkage, sulphoaluminate expansive agent is usually used. Besides, high volume mineral admixtures used to decrease hydration thermal and delay appearing of temperature peak However, expansion effect compressive strength were probably affected by interactively. In this study, effects GGBS FA on performance at simulated concrete investigated, moderate additional gypsum was eliminate these negative effects. XRD, TG-DTG SEM analyze process, products morphology products. The results show that decreased addition curing condition. Both samples blended with increased gypsum, because promoted generation AFt stimulated GGBS. But for FA, but seriously prolonged setting time samples, resulted consuming energy plastic deformation.
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