A new approach in quantitative in-situ XRD of cement pastes: Correlation of heat flow curves with early hydration reactions

被引：240

作者：

Hesse, Christoph ^{[1
]}

Goetz-Neunhoeffer, Friedlinde ^{[1
]}

Neubauer, Juergen ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, GeoZentrum Nordbayern, D-91054 Erlangen, Germany

来源：

CEMENT AND CONCRETE RESEARCH | 2011年 / 41卷 / 01期

关键词：

Calorimetry A; Hydration A; Kinetics A; X-Ray Diffraction B; Thermodynamic Calculations B; CALCIUM-SILICATE-HYDRATE; BEARING SOLID-PHASES; C-S-H; TRICALCIUM ALUMINATE; PORTLAND-CEMENT; SOLUBILITY BEHAVIOR; AL-BEARING; TEMPERATURE; MECHANISMS;

D O I：

10.1016/j.cemconres.2010.09.014

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

XRD measurements of the hydration of synthetical cement (SyCem) were used to calculate the resulting heat flow from changes in the phase content. Calculations were performed by application of thermodynamic data. The comparison with data recorded from heat flow calorimetry was in good agreement with the calculated heat flow. The initial maximum of heat flow mainly is caused by the aluminate reaction. During the entire main period the silicate reaction dominates hydration with a high and long first maximum of heat flow. The second but less intense heat flow maximum - only visible as a shoulder in most of the technical cements - can be attributed to an acceleration of the aluminate reaction with the enhanced dissolution of C(3)A and the final formation of ettringite. Moreover, the investigation showed that the dissolution process of C(3)A is directly controlled by the availability of the calcium sulfate phases. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：123 / 128

页数：6

共 7 条

[1] In-situ XRD study of the temperature-dependent early hydration of calcium aluminate cement in a mix with calcite
Goergens, J.
Manninger, T.
Goetz-Neunhoeffer, F.
[J]. CEMENT AND CONCRETE RESEARCH, 2020, 136
[2] Quantitative characterization of the early hydration of magnesium potassium phosphate cement: In-situ experiment with low field NMR
Ma, Shanliang
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Liu, Xiaoming
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[J]. CONSTRUCTION AND BUILDING MATERIALS, 2023, 377
[3] The early hydration of Ordinary Portland Cement (OPC): An approach comparing measured heat flow with calculated heat flow from QXRD
Jansen, D.
Goetz-Neunhoeffer, F.
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[J]. CEMENT AND CONCRETE RESEARCH, 2012, 42 (01) : 134 - 138
[4] The early hydration of OPC investigated by in-situ XRD, heat flow calorimetry, pore water analysis and 1H NMR: Learning about adsorbed ions from a complete mass balance approach
Jansen, D.
Naber, Ch.
Ectors, D.
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Kong, X. -M.
Goetz-Neunhoeffer, F.
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[J]. CEMENT AND CONCRETE RESEARCH, 2018, 109 : 230 - 242
[5] The influence of fly ash on the hydration of OPC within the first 44 h-A quantitative in situ XRD and heat flow calorimetry study
Dittrich, S.
Neubauer, J.
Goetz-Neunhoeffer, F.
[J]. CEMENT AND CONCRETE RESEARCH, 2014, 56 : 129 - 138
[6] The hydration of synthetic brownmillerite in presence of low Ca-sulfate content and calcite monitored by quantitative in-situ-XRD and heat flow calorimetry
Ectors, D.
Neubauer, J.
Goetz-Neunhoeffer, F.
[J]. CEMENT AND CONCRETE RESEARCH, 2013, 54 : 61 - 68
[7] Controlling the early-age hydration heat release of cement paste for deep-water oil well cementing: A new composite designing approach
Wang, Da-heng
Yao, Xiao
Yang, Tao
Xiang, Wen-rui
Feng, Ying-tao
Chen, Yu
[J]. CONSTRUCTION AND BUILDING MATERIALS, 2021, 285

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