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Materials 2014, 7(4), 3049-3064; doi:10.3390/ma7043049
Article

Physical Characterization of Cementitious Materials on Casting and Placing Process

1
 and
2,*
1 Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea 2 School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Korea
* Author to whom correspondence should be addressed.
Received: 25 February 2014 / Revised: 7 April 2014 / Accepted: 10 April 2014 / Published: 15 April 2014
(This article belongs to the Special Issue Construction Materials)
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Abstract

Coagulation of cement particles is an inevitable phenomenon of fresh cement-based materials undergoing solidification. Coagulation can be classified into two types, reversible flocculation and irreversible coagulation, wherein microstructural change affects the rheological properties, including shear thinning and thixotropy, and the hydration process. This paper attempts to measure the mechanical property and the coagulation of cement particles according to the mix proportions of cement paste. Experimental setups were proposed for two different types of coagulations using a laser backscattering instrument. Volume fraction and size distribution of coagulated particles were obtained, and their variations were discussed. From the obtained results the microstructural buildup of freshly mixed cement pastes can be divided into three categories: permanent coagulation and strong and weak flocculation.
Keywords: cement paste; particle size; coagulation; flocculation; laser backscattering cement paste; particle size; coagulation; flocculation; laser backscattering
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Yim, H.J.; Kim, J.H. Physical Characterization of Cementitious Materials on Casting and Placing Process. Materials 2014, 7, 3049-3064.

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