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The influence of the mixing time in the rheological behavior of cement pastes
(2008-12-01)
Rheology has the purpose to study the flux and deformation of materials when submitted to some tension or outer mechanical solicitation. In practice, the effective scientific field broached by rheology is restricted only ...
The influence of the mixing time in the rheological behavior of cement pastes
(2008-12-01)
Rheology has the purpose to study the flux and deformation of materials when submitted to some tension or outer mechanical solicitation. In practice, the effective scientific field broached by rheology is restricted only ...
Assessment of sugar cane straw ash (SCSA) as pozzolanic material in blended Portland cement: Microstructural characterization of pastes and mechanical strength of mortars
(2015-07-21)
Abstract The aim of this paper is to assess the pozzolanic reactivity of sugar cane straw ash (SCSA) obtained through an auto-combustion process and the mechanical properties of SCSA-containing systems. Characterization ...
Effect of metakaolin pozzolanic activity in the early stages of cement type II paste and mortar hydration
(2008-04-01)
The cement industry is one which most emits polluting gases to the environment, due to the calcium carbonate calcination, as well as to the burning of fossil fuels during the manufacturing process. Metakaolin (MK), in ...
Control of hydration rate of polymer modified cements by the addition of organically modified montmorillonites
(Elsevier, 2013-03)
The addition of polyvinyl alcohol (PVA) in concrete causes a delay in the hydration rate of Portland cement paste. Three different montmorillonites (MMTs) (Cloisite Na, 30B, and Nanofil) were previously mixed with PVA in ...
Effect of EVA on the fresh properties of cement paste
(ELSEVIER SCI LTDOXFORD, 2012)
The improved workability effect of latex in dry mortars has not been fully clarified. The purpose of this research was to investigate the influence cif the EVA copolymer on the cement hydration and on the rheological ...
Characterization of elastic and time-dependent deformations in high performance lightweight concrete by image analysis
(PERGAMON-ELSEVIER SCIENCE LTD, 2009)
Image analysis and strain mapping were used to examine the nature of elastic, creep and shrinkage strains in high performance lightweight concrete (HPLC). The strain maps showed non-uniform deformations related to ...
Effect of HMEC on the consolidation of cement pastes: Isothermal calorimetry versus oscillatory rheometry
(PERGAMON-ELSEVIER SCIENCE LTD, 2009)
Chemical admixtures increase the theological complexity of cement pastes owing to their chemical and physical interactions with particles, which affects cement hydration and agglomeration kinetics. Using oscillatory rheometry ...
Test protocol and rheological model influence on determining the rheological properties of cement pastes
(2021-12-01)
The rheological characterization of cement pastes, mortars and concretes considers the rheological parameters of complex suspensions, composed by different materials, which interact both chemically, and physically. In ...