The influence of mineral admixtures on the rheology of cement paste and concrete

Ferraris, Chiara F.; Obla, Karthik H.; Hill, Russell L.

doi:10.1016/s0008-8846(00)00454-3

Cited by 510 publications

(209 citation statements)

References 6 publications

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“…These results are not common since several papers reported that an increase in VEA dosage leads to a rise in the yield stress [10][11][12]21,46,47], but is in agreement with recent study [17].…”

Section: Yield Stresssupporting

confidence: 90%

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Poinot

Govin

Grosseau

2014

Cement and Concrete Research

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To cite this version:Thomas Poinot, Alexandre Govin, Philippe Grosseau. Influence of hydroxypropylguars on rheological behavior of cement-based mortars. Cement and Concrete Research, Elsevier, 2014, 58, pp.161-168 properties was thus investigated thanks to a suitable measurement procedure. HPG allows keeping a positive yield stress value while the yield stress of hydroxypropyl methyl cellulose (HPMC) mortars was found to decrease with an increase in dosage. HPG increases the shearthinning behavior and the consistency of mortars. The study of pore solution viscositysuggests that the entanglement of HPG coils beyond a threshold dosage is crucial to understand the rheological macroscopic behavior of HPG-admixed mortars. Nevertheless, the increase in mortar viscosity induced by HPG was lower than expected which reveals additional and specific repulsive forces induced by polysaccharides.

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Section: Yield Stresssupporting

confidence: 90%

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Poinot

Govin

Grosseau

2014

Cement and Concrete Research

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“…Moreover, it can be emphasized that among the SCM having extremely high fineness, addition of SF has a more significant effect on the mixture viscosity compared to that of MK at the same level of cement replacement. These results are in agreement with other studies [6,10,18,20,27,35].…”

Section: Plastic Viscositysupporting

confidence: 94%

“…For example, when w/b = 0.44, HRWR demand increased by approximately 40% when the percentage of SF increased from 0% to 12% but the increase in HRWR demand was approximately 30% when the percentage of MK was changed from 0% to 18%. Similar results are reported by other investigations [18,27,28]. The high HRWR demand of SF is probably due to extremely fine nature and high surface area of grain content (Fig.…”

Section: Hrwr Demandsupporting

confidence: 90%

Effect of various supplementary cementitious materials on rheological properties of self-consolidating concrete

Ahari

Erdem

Ramyar

2015

Construction and Building Materials

119

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h i g h l i g h t sThe effect of binder type and content on the benefits of SCM in SCC was investigated. Metakaolin was able to increase the plastic viscosity of SCC by 90%. Silica fume and blast furnace slag reduced the plastic viscosity of SCC. Yield stress of the mixtures with SCM was higher than that of the control mixtures. a r t i c l e i n f o b s t r a c tIn design of self-consolidating concrete (SCC) for a given application, the mixture's rheological parameters should be adjusted to achieve a given profile of yield stress and plastic viscosity. Supplementary cementitious materials (SCM) can be useful for this adjustment in addition to their other advantages. In this study, the rheological properties of 57 SCC mixtures with various SCM were investigated for a constant slump flow value. For this aim, various amounts of silica fume (SF), metakaolin (MK), Class F fly ash (FAF), Class C fly ash (FAC) and granulated blast-furnace slag (BFS) were utilized in binary, ternary, and quaternary cementitious blends in three water/binder ratios. Results showed that SF and BFS decreased plastic viscosity and V-funnel time values in comparison with mixtures containing only Portland cement (PC). However the opposite tendency was observed when MK, FAC and FAF were incorporated with PC. Substitution of PC with SF, MK and FAC increased high range water reducer (HRWR) demand in the SCC mixtures having constant slump flow. Use of SCM in SCC mixtures increased yield stress values. Good correlations were established between plastic viscosity and V-funnel flow time values for all w/b ratios.

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“…For example, HRWR demand was increased by approximately 40% when the percentage of SF was increased from 0% to 12% but the increase in HRWR demand was approximately 30% when the percentage of MK was changed from 0% to 18% for w/b ratio of 0.44. The greater HRWR demand of SF than that of MK was also noted in other investigations [8,47].…”

Section: Hrwr Demandsupporting

confidence: 82%

“…Moreover, they have lower hydration reaction ability than PC. Also, BFS particles can fill into the spaces between larger particles of PC and lead to a decrease in frictional forces in BFS blended mixtures [47,54]. Due to these factors, replacement of PC with BFS resulted in a decrease initial torque values.…”

Section: Breakdown Area Valuesmentioning

confidence: 99%

Thixotropy and structural breakdown properties of self consolidating concrete containing various supplementary cementitious materials

Ahari

Erdem

Ramyar

2015

Cement and Concrete Composites

103

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Supplementary cementitious materials Thixotropy Breakdown Drop in apparent viscosity Yield value at rest a b s t r a c tIn this study, thixotropy and structural breakdown of 57 self-consolidating concrete (SCC) mixtures containing various supplementary cementitious materials (SCM) were investigated by different approaches. The effects of SCM type and content on high range water reducer demand and plastic viscosity were also studied. For these purposes, various amounts of silica fume (SF), metakaolin (MK), Class F fly ash (FAF), Class C fly ash (FAC) and granulated blast-furnace slag (BFS) were utilized in binary, ternary, and quaternary cementitious blends in three water/binder (w/b) ratios. Results showed that except BFS, use of SCM in SCC mixtures increased thixotropy values in comparison with the mixtures containing only portland cement (PC). Good correlations were established between structural breakdown area and drop in apparent viscosity values for all w/b ratios. The different methods used to evaluate the thixotropy and structural breakdown got more consistent with each other as w/b decreased.

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The influence of mineral admixtures on the rheology of cement paste and concrete

Cited by 510 publications

References 6 publications

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Effect of various supplementary cementitious materials on rheological properties of self-consolidating concrete

Thixotropy and structural breakdown properties of self consolidating concrete containing various supplementary cementitious materials

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