Evaluation of Autogenous Shrinkage in High-Performance Concrete
الموضوعات :
Jamal Ahmadi
1
(1Assistant Professor at University of Zanjan, Zanjan, Iran)
Reza Naghdi2
2
(Faculty of Engineering, University of Zanjan, Zanjan, Iran)
الکلمات المفتاحية: Autogenous Shrinkage, High-Performance Concrete, silica fume, High-Strength Concrete,
ملخص المقالة :
Recent tendencies in concrete technology have been towards to high- performance concrete with a low water-cement ratio. However, high performance concretes have some problems. One of the problems is early-age cracking due to autogenous shrinkage. This study presents the results of an experimental investigation carried out to evaluate the autogenous shrinkage of high-strength concrete. According to this, effects of water/binder ratio, cement content, fine to coarse aggregate ratio and silica fume content were evaluated. From the results of this investigation, it can be concluded that the autogenous shrinkage strain of high strength concrete increases with reduction of w/b ratio. The results show also that the variation of cement content and fine to coarse aggregate ratio had only a limited effect on the autogenous shrinkage.
