In situ measurement of the rheological properties and agglomeration on cementitious pastes
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, 50 UNIST-gil, Ulsan 44919 (Korea, Republic of)
- Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, 301 East Dean Keeton Street, C1748, Austin, Texas 78712 (United States)
Various factors influence the rheology of cementitious pastes, with the most important being the mixing protocol, mixture proportions, and mixture composition. This study investigated the influence of ground-granulated blast-furnace slag, on the rheological behavior of cementitious pastes. In tandem with the rheological measurements, fresh state microstructural measurements were conducted using three different techniques: A coupled stroboscope-rheometer, a coupled laser backscattering-rheometer, and a conventional laser diffraction technique. Laser diffraction and the coupled stroboscope-rheometer were not good measures of the in situ state of flocculation of a sample. Rather, only the laser backscattering technique allowed for in situ measurement on a highly concentrated suspension (cementitious paste). Using the coupled laser backscattering-rheometer technique, a link between the particle system and rheological behavior was determined through a modeling approach that takes into account agglomeration properties. A higher degree of agglomeration was seen in the ordinary Portland cement paste than pastes containing the slag and this was related to the degree of capillary pressure in the paste systems.
- OSTI ID:
- 22598927
- Journal Information:
- Journal of Rheology, Vol. 60, Issue 4; Other Information: (c) 2016 The Society of Rheology; Country of input: International Atomic Energy Agency (IAEA); ISSN 0148-6055
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AGGLOMERATION
BACKSCATTERING
BLAST FURNACES
CAPILLARIES
COMPUTERIZED SIMULATION
DIFFRACTION
FLOCCULATION
LASERS
MICROSTRUCTURE
MIXING
MIXTURES
PORTLAND CEMENT
RHEOLOGY
SLAGS
SUSPENSIONS