Effect of Dehydrated Cement Paste (DCP) Addition on Cementitious Characteristics of Cement in Early Age

Title: Effect of Dehydrated Cement Paste (DCP) Addition on Cementitious Characteristics of Cement in Early Age
Author(s): Zhonghe SHUI, Rui YU
Paper category : conference
Book title: 2nd International Conference on Waste Engineering and Management - ICWEM 2010
Editor(s): J.Zh. Xiao, Y. Zhang, M.S. Cheung and Reuben P. K. Chu
Print-ISBN: 978-2-35158-102-5
e-ISBN: 978-2-35158-103-2
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 138 - 148
Total Pages: 11
Nb references: 15
Language: English

Abstract: This paper outlines the study conducted on the effect of dehydrated cement paste (DCP) addition on cementitious characteristics of cement at an early stage. The DCP was prepared firstly. Then, the DCP was added into the cement system to replace parts of cement with the mass portion of 5%, 7.5%, 10%, 12.5%, 15%, 17.5%, 20%, 22.5% and 25% respectively.
The cementitious characteristics of each group were then evaluated by the required water of standard consistency, setting time and compressive strength development. Techniques of thermo gravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to identify the hydration process of DCP/cement systems at the early stage. The results obtained reveal that with the increase of the content of DCP, the DCP/cement systems have high required water of standard consistency and short setting time. When the content of DCP reaches 10% approximately, the hydration of cement can be accelerated in the largest extent and the strength contribution percent in theory (TSC) of DCP for 1d will reaches the maximum.

Online publication: 2011-01-25
Publication type : full_text
Public price (Euros): 0.00