کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
258655 | 503621 | 2012 | 6 صفحه PDF | دانلود رایگان |
A modified equivalent micro-mechanics model, which is considered based on an initial model of an infinite matrix with an inclusion, has been developed for estimation of the elastic modulus of concrete. It is assumed that aggregate or cement is the inclusion of equivalent model, and elastic modulus of the model is considered according to the volume fraction of each component. The equations of effective elastic modulus are obtained based on this equivalent model, which contains volume fractions of aggregates and voids as its variables. The equations obtained can account for the evolution of interfacial debonding damage between aggregate and cement. The results show that the concrete modulus increases with the increase of aggregate volume fraction. However, the Poisson’s ratio decreases with the increase of aggregate volume fraction.
► A new equivalent micro-mechanics model is obtained for the estimation of elastic modulus of the composite/concrete.
► Numerical analyses are carried out to obtain the bulk/shear modulus for various volume fractions of aggregates.
► The equations obtained can account for the evolution of interfacial debonding damage between the aggregate and cement.
Journal: Construction and Building Materials - Volume 36, November 2012, Pages 572–577