微膨胀高性能混凝土的试验研究

Study on expansive high performance concrete by using expansive agent and natural anhydrous gypsum

研究了优质的UEA膨胀剂及天然无水石膏粉分别配制的C60高性能混凝土,并将其在水中及自然条件下养护,测定了收缩与膨胀。在自然条件下养护的UEA混凝土试件,早期微膨胀,后期收缩;在水中养护的试件,早期膨胀,到某一峰值后,膨胀率逐步降低。天然无水石膏粉配制的试件,在水中及自然条件下养护的膨胀或收缩都很微小。

Study on expansion of high performance concrete （HPC） with strength grade C60 by using expansive agent （UEA） and natural an-hydrous gypsum respectively.Both the two types of concrete specimens are cured in water and natural conditions.The specimens with UEA cured in water are expansion in the early age, but when the expansion get to maximum and than down fall; the specimens cured in natural conditions are expansive a little at origin and than get to shrink.The specimens with natural anhydrous gypsum both cured in water or in natural conditions, which expansion or shrinkage is a little or no.