Carboaluminate Reactions as Influenced by Limestone Additions

Ingram, Kevin D.; Poslusny, Matthew; Daugherty, Kenneth E.; Rowe, William Charles

doi:10.1520/stp23467s

Cited by 12 publications

(10 citation statements)

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“…In past studies, generally calcite-free or calcite-poor cements were used [15,16,100]. Only recently, a critical evaluation of different experimental data combined with a set of new solubility measurements [43], could show that monosulfate is more stable than hydrogarnet in OPC systems, which agrees also with the experimental observations reported in the literature [9,126,160,161,[166][167][168]. The continuing refinement of the available thermodynamic databases made and will continue to make thermodynamic predictions more and more precise.…”

Section: Coupling Of Thermodynamic Modeling With Hydrationsupporting

confidence: 67%

Thermodynamic equilibrium calculations in cementitious systems

Lothenbach

2010

Mater Struct

180

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Section: Coupling Of Thermodynamic Modeling With Hydrationsupporting

confidence: 67%

Thermodynamic equilibrium calculations in cementitious systems

Lothenbach

2010

Mater Struct

180

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“…2. It has been reported that the CaCO 3 in OPC may chemically react with tricalcium aluminate, C 3 A to form calcium carboaluminate hydrates with or without the presence of gypsum (Ingram et al, 1990;Ramachandran, 1988 (Carleson and Berman, 1960;Klemm and Adams, 1990). The decrease of the amount of CaCO 3 in the first 10 hours may be due to the consumption of CaCO 3 by the chemical reaction with C 3 A.…”

Section: Resultsmentioning

confidence: 99%

Effect of nano-CaCO₃ on hydration of cement containing supplementary cementitious materials

Sato

Beaudoin

2011

Advances in Cement Research

204

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1680/adcr.9.00016Advances in Cement Research, 23, 1, pp. 1-29, 2011-01-01 Effect of nano-CaCO3 on hydration of cement containing supplementary cementitious materials Sato, T.; Beaudoin, J. J.

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“…It was previously indicated that this significant decrease of the amount of CaCO 3 in the sample of the OPC + nano-CaCO 3 may be related to the enhanced shoulder on the rate of heat development curve shown in Figure 2 (8). The CaCO 3 content in OPC may chemically react with tricalcium aluminate (C 3 A) to form calcium carboaluminate hydrates (10,11). The decrease of the amount of CaCO 3 may be due to the consumption of CaCO 3 by the chemical reaction with C 3 A.…”

Section: Thermogravimetric Analysismentioning

confidence: 93%

Seeding Effect of Nano-CaCO₃ on the Hydration of Tricalcium Silicate

Sato

Diallo

2010

Transportation Research Record

171

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A previous study indicated that the early hydration and strength development of ordinary portland cement (OPC) delayed by the presence of high volumes of supplementary cementitious materials were compensated for by the accelerating effect of nano-CaCO3. The mechanism responsible for the accelerating effect on the early hydration and strength development was, however, not fully understood. A study aimed at understanding the accelerating mechanism of the addition of nano-CaCO3 on the hydration of tricalcium silicate (C3S) is presented in this paper. A comparison with the addition of micro-CaCO3 was made. The hydration mechanism of C3S with the addition of micro- or nano-CaCO3 was studied by conduction calorimetry, thermogravimetric analysis, and scanning electron microscopy. The conduction calorimetry results indicated that the addition of nano-CaCO3 had an accelerating effect on the hydration of C3S as well as on the hydration of OPC. Furthermore, the induction period of C3S hydration was significantly shortened by the addition of nano-CaCO3. The results of the thermogravimetric analysis indicated that the amount of nano-CaCO3 decreased as the hydration of C3S took place; the decrease was greater with the hydration of OPC. The scanning electron microscopy revealed that the accelerating mechanism in the presence of micro-CaCO3 was considerably different from that of nano-CaCO3. Calcium silicate hydrate growth was observed around the nano-CaCO3 particles. The observation suggested that the seeding effect due to the addition of nano-CaCO3 was responsible for the accelerating effect on the hydration of C3S.

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Carboaluminate Reactions as Influenced by Limestone Additions

Cited by 12 publications

References 0 publications

Thermodynamic equilibrium calculations in cementitious systems

Thermodynamic equilibrium calculations in cementitious systems

Effect of nano-CaCO₃ on hydration of cement containing supplementary cementitious materials

Seeding Effect of Nano-CaCO₃ on the Hydration of Tricalcium Silicate

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Carboaluminate Reactions as Influenced by Limestone Additions

Cited by 12 publications

References 0 publications

Thermodynamic equilibrium calculations in cementitious systems

Thermodynamic equilibrium calculations in cementitious systems

Effect of nano-CaCO3 on hydration of cement containing supplementary cementitious materials

Seeding Effect of Nano-CaCO3 on the Hydration of Tricalcium Silicate

Contact Info

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Effect of nano-CaCO₃ on hydration of cement containing supplementary cementitious materials

Seeding Effect of Nano-CaCO₃ on the Hydration of Tricalcium Silicate