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Kim, Jae Hong
Research Group for Concrete Structures and Materials
Research Interests
  • Mechanics of Concrete, Rheology, Structural Analysis, Construction Performance

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Physical characterization of cementitious materials on casting and placing process

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Title
Physical characterization of cementitious materials on casting and placing process
Author
Yim, Hong JaeKim, Jae Hong
Keywords
Cement paste; Coagulation; Flocculation; Laser backscattering; Particle size
Issue Date
201404
Publisher
MDPI AG
Citation
MATERIALS, v.7, no.4, pp.3049 - 3064
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.
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DOI
http://dx.doi.org/10.3390/ma7043049
ISSN
1996-1944
Appears in Collections:
UEE_Journal Papers
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