Hydration heat kinetics of concrete with silica fume

Kadri, El-Hadj; Duval, R. M. Pradeilles

doi:10.1016/j.conbuildmat.2009.06.008

Cited by 117 publications

(36 citation statements)

References 10 publications

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“…The un-reacted 6 agglomerate is over 70 μm in size. Un-dispersed silica fume agglomerates present in 7 concrete have been reported by other authors (22,23). Alkali-silica reaction (ASR) in 8 silica fume aggregates has been also identified.…”

Section: Sonication Treatments Of Densified and Non-densified Silica supporting

confidence: 72%

Increase of the reactivity of densified silica fume by sonication treatment

Rodríguez

Soriano

Payá

et al. 2012

Ultrasonics Sonochemistry

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Abstract. 12Five silica fumes from different manufacturers were subjected to ultrasonic treatment in 13 order to decrease particle agglomeration and improve particle dispersion. The 14 effectiveness of the sonication was observed as a reduction in particle size distribution 15 of sonicated silica fume (SSF) compared to non-sonicated silica fume. SSF was added 16 to Portland cement, which were analysed using thermogravimetric analyses 17 (TGA/DTG) and scanning electron microscopy (SEM/EDX). The results were 18 compared with those of control pastes made with untreated densified silica fume (DSF), 19 as well as a reference cement paste of ordinary Portland cement (OPC). A maximum 20 grade of de-agglomeration by the sonication was obtained, with high volume of 1 particles of diameter less than 1μm. Images obtained by transmission electron 2 microscopy (TEM) of the SSF showed sintered particles that could be not fragmented 3 by the treatment. Micro-structural characterisation results showed an increase in the 4 reactivity of the silica fume after the treatment. 5 6

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Section: Sonication Treatments Of Densified and Non-densified Silica supporting

confidence: 72%

Increase of the reactivity of densified silica fume by sonication treatment

Rodríguez

Soriano

Payá

et al. 2012

Ultrasonics Sonochemistry

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“…Nano-sized CaCO 3 has also been shown to improve even 1-day compressive strength results [24]. Silica fume and nano-silica (NS) stimulate hydration and register accelerated pozzolanic activity [25,26]-with silica fume and NS providing seeding effect owing to their very small particle size and reactivity with CH to form CSH and CAH, even in the very early stages of hydration-which activates HVFA mixtures for early strength development [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Nano-modification to improve the ductility of cementitious composites

Yeşilmen

Al-Najjar

Balav

et al. 2015

Cement and Concrete Research

105

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“…Fly ash increases the initial hydration of cement, but prolongs the dormant and acceleration periods. Silica fume also accelerates the initial hydration, but prolongs the dormant period when it is at low water to binder ratio [2,3]. However both fly ash and silica fume enhance the hydration of the cement in the later periods, the total hydration degree of the blend system is reduced with the increase of the content of fly ash and silica fume [4].…”

Section: Introductionmentioning

confidence: 89%

Probing the hydration of composite cement pastes containing fly ash and silica fume by proton NMR spin-lattice relaxation

She

Yao

2010

Sci. China Technol. Sci.

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Proton NMR spin-lattice relaxation (T 1 ) was used as a prober for observing the hydration process of composite cement pastes blending fly ash and silica fume during the early age. The distribution at initial time, evolution curves and signals intensity of T 1 were shown in this paper. Results demonstrate that the T 1 distribution curves at initial time exhibit two peaks, which are regarded as two different water phases in the pastes. The evolution curves of T 1 are in good agreement with the hydration process of composite pastes and could be roughly divided into four stages: initial period, dormant period, acceleration period and steady period. The hydration mechanism for each stage was discussed. The hydration of the composite cement pastes was retarded by the addition of fly ash and silica fume when compared to that of pure cement. However, the hydration degree of the cement in the blends was promoted. NMR, relaxation, cement, fly ash, silica fume, hydration Citation:She A M, Yao W. Probing the hydration of composite cement pastes containing fly ash and silica fume by proton NMR spin-lattice relaxation. Sci

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Hydration heat kinetics of concrete with silica fume

Cited by 117 publications

References 10 publications

Increase of the reactivity of densified silica fume by sonication treatment

Increase of the reactivity of densified silica fume by sonication treatment

Nano-modification to improve the ductility of cementitious composites

Probing the hydration of composite cement pastes containing fly ash and silica fume by proton NMR spin-lattice relaxation

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