High strength mortars containing condensed silica fume

Buil, M.; Paillere, A M; Roussel, B.

doi:10.1016/0008-8846(84)90033-4

Cited by 39 publications

(8 citation statements)

References 2 publications

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“…Limestone filler [8], quartz powder [9], fly ash [14,15], silica fume [7,13], and ground granulated blast furnace slag [22] are often used as mineral admixtures as they can be used as partial replacement of Portland cement and they are likely to improve concrete durability. This enhancement increases with greater powder fineness [10,11].…”

Section: Use Of Sediments As Mineral Admixture In Mortarsmentioning

confidence: 99%

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Valorisation of sediments in self-consolidating concrete: Mix-design and microstructure

Rozière

Samara

Loukili

et al. 2015

Construction and Building Materials

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h i g h l i g h t sTreated sediments can be used as a cementitious material in concrete. Concrete Rheology is related to intragranular porosity and absorption of sediments. The performance of treated sediments was predicted by the coefficient of activity. a b s t r a c tThis study deals with the potential use of treated sediments (TS) in self-consolidating concrete. The compressive strengths of mortars have shown a significant activity of TS with cement. This activity is directly related to the particle size distribution of TS, as a higher coefficient of activity was observed for finer TSpowders. Therefore, treated sediments could be used as cementitious materials. TS were incorporated in self-consolidating concrete design as a replacement of limestone filler and aggregates. The average compressive strength of sediment-based concrete specimens is comparable to that of reference concrete. However, the use of TS resulted in a decrease in slump flow due to the high internal porosity of TS. Rheological tests have been carried out on pastes to assess the loss of workability observed on mortars and concrete. An increase in yield stress and plastic viscosity has been observed for sediment-based paste with respect to that of limestone filler leading to a lower slump flow since this parameter is closely related to yield stress. The microstructural analyses of concrete have shown the positive effect of TS on hydration at the microscopic level.

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Section: Use Of Sediments As Mineral Admixture In Mortarsmentioning

confidence: 99%

“…The finer particles, such as silica fume and limestone microfiller, allow a reduction of the initial porosity of cement paste [7,8]. Mineral admixtures such as fillers often enhance the hydration of cement [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Valorisation of sediments in self-consolidating concrete: Mix-design and microstructure

Rozière

Samara

Loukili

et al. 2015

Construction and Building Materials

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“…Buil et al 18 carried out a series of isothermal experiments at 258C and reported the rate of the heat of hydration of cement paste incorporating various dosages of SNF. The times of the second peak extracted from the results of their study are given in Table 3.…”

Section: Influence Of Superplasticisermentioning

confidence: 99%

“…This agrees with the observation repeated in various experimental investigations that the concrete incorporating SF requires a higher amount of superplasticiser than concrete without SF. 25,26 Buil et al 18 suggested the adsorption amount of SNF…”

Section: Influence Of Silica Fume (Sf)mentioning

confidence: 99%

Numerical simulation of temperature rise of highstrength concrete incorporating silica fume and superplasticiser

Swaddiwudhipong

Zhang

2003

Advances in Cement Research

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A numerical model is proposed to predict the process of adiabatic temperature rise of high-strength concrete (HSC) incorporating silica fume (SF) and superplasticisers. On the basis of predicting the exothermic hydration process of plain concrete, the proposed numerical model takes the retardation caused by the superplasticisers and the effect caused by the SF into consideration. The verification of the proposed model is carried out with several groups of experimental data on concrete at different water to cementitious material ratios and initial temperatures. This numerical model is able to predict the adiabatic temperature history of HSC with SF and superplasticiser. The computing model requires the following relevant material parameters, namely, the mineral composition of Portland cement, the amount of SF, the dosage of superplasticiser, mix proportions and initial placing temperature of concrete. The model is useful in the prediction of heat of hydration, temperature distribution in mass concrete providing useful information on de-moulding at early ages and on controlling the potential thermal cracking.

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“…Several investigations report enhanced cement hydration caused by pozzolan incorporation (Buil et al 1984;Cheng-Yi and Feldman 1985;Rahhal and Talero 2009;Takemoto and Uchikawa 1980;Massazza 2004). Contrarily, other investigations report no change or a delay in early hydration upon pozzolan incorporation (Zhou et al 2012;Carette and Malhotra 1983;Naik and Singh 1997;Schindler and Folliard 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of Pozzolan Content and Fineness on Early Hydration of Interground Blended Cements

Erdoğan

Över

Tokyay

2014

ACT

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The chemical composition and heat evolution of <45 μm (fine), and > 45 μm (coarse) portions of interground, natural pozzolan-blended cements were investigated. Cements with four different pozzolan contents were ground to 300 m 2 /kg, 500 m 2 /kg, and 600 m 2 /kg fineness and sieved through a 45 μm sieve. Clinker, pozzolan, and gypsum contents in the fine and coarse portions after sieving were determined and compared with the unsieved cements. Heat of hydration evolution of the samples were determined up to 48 h using isothermal calorimetry. The fine portions of the cements always contained more gypsum, had higher pozzolan-to-clinker ratios, and slightly higher tricalcium silicate contents, which influenced the rate of heat development at early ages. The fine portions contribute more to the total early heat evolved than the coarse portions. A small amount of pozzolan enhances early hydration. The heat evolved up to 24 h was related linearly to the heat evolved up to 48 h. Such observations could be useful in the modeling of early hydration of blended cements.

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High strength mortars containing condensed silica fume

Cited by 39 publications

References 2 publications

Valorisation of sediments in self-consolidating concrete: Mix-design and microstructure

Valorisation of sediments in self-consolidating concrete: Mix-design and microstructure

Numerical simulation of temperature rise of highstrength concrete incorporating silica fume and superplasticiser

Effect of Pozzolan Content and Fineness on Early Hydration of Interground Blended Cements

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