Rheological behavior of fresh mortar

Title: Rheological behavior of fresh mortar
Author(s): Qianqian Zhang, Jianzhong Liu, Changwen Miao and Jiaping Liu
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 223 - 230
Total Pages: 8
Nb references: 11
Language: English

Abstract: Rheological parameters are considered to be more suitable to characterize the workability of fresh cement-based materials than slump value or flowability. The rheology of fresh mortar can be affected by different factors. The effects of water-binder ratio (vary from w/b=0.35 to w/b=0.45), sand-binder ratio (vary from s/b=0 to s/b= 2.0) and mineral admixtures addition on rheology of fresh mortar were investigated in this paper. Fly ash and slag with different proportions were individually added as a partial replacement for cement in w/b=0.3, s/b=1.0 mortar mixtures. Both yield stress and plastic viscosity which are described in Bingham model were employed to characterize rheological behavior of fresh mortar and tested by rheometer. The investigation herein is not only to acquire how rheology was influenced by the various factors, but also to establish models to predict values of rheological parameters. A new model is proposed to predict the plastic viscosity of fresh mortar, and the verification results show that the model is reliable.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00