Effect of Relative Humidity on Carbonation Shrinkage and Hydration Product of Cement Paste

Suda, Yuya; Tomiyama, Jun; Saito, Tsuyoshi; Saeki, Tatsuhiko

doi:10.14250/cement.73.71

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…In practice, carbonation is one of the most detrimental degradation phenomenon for concrete durability as it induces uniform corrosion of the reinforcing steel bars [53][54][55] . This degradation involves the coupling of several processes: gaseous migration and dissolution; mineral dissolution and precipitation as well as porosity evolution 56 ; release, evaporation and transport of water 57 ; solid phase shrinkage [58][59][60] and tensile stresses leading to the appearance of cracks [61][62][63] . 57 have shown that reactive transport modelling alone was not able to reproduce the observed degradation depths and the reaction fronts as soon as a crack pattern was observable.…”

Section: Introductionmentioning

confidence: 99%

A coupled hydro-chemo-mechanical approach to model the degradation and appearance of cracks in cementitious materials subject to carbonation

Seigneur

Socié

Bary

et al. 2023

Preprint

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Coupled Thermal-Hydraulic-Mechanical-Chemical (THMC) approaches are crucial for assessing the durability of cementitious materials. We present a novel approach to overcome past limitations of THMC modelling and validate it based on experimental results of accelerated carbonation tests. Our numerical approach rests on a sequential coupling between Hytec and Cast3M. Hytec computes the evolution of hydraulic and mineralogical fields allowing to compute the micromechanical properties (e.g. Young modulus). The mineral reactions generate tensile stresses and Cast3M computes the associated strain tensors and the damage evolution represented by the opening or sealing of cracks, impacting subsequent reactive transport processes. Our approach manages to reproduce the crack patterns and non-uniform degradation depths observed on microtomographic images of carbonated cement samples, which can only be explained by the coupled dynamics of chemical and mechanical processes. Our approach can be extended to a wide range of cement-concrete pathologies and contexts.

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Section: Introductionmentioning

confidence: 99%

A coupled hydro-chemo-mechanical approach to model the degradation and appearance of cracks in cementitious materials subject to carbonation

Seigneur

Socié

Bary

et al. 2023

Preprint

View full text Add to dashboard Cite

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“…11 Factors influencing the rate of carbonation include relative humidity (RH), temperature, porosity, cement type and CO 2 concentration (cCO 2 ), pressure, duration, etc. The influence of RH at constant cCO 2 of 3% was studied by Suda et al 12,13 Galan et al followed the carbonation of HCP at constant RH and 100% CO 2 14 and as a function of RH, water to cement ratio (w/c), and different cCO 2 . 15 The utilization of CO 2 for carbonation curing proposed in the 1970s 16 has also been intensively investigated recently as a method for CO 2 sequestration.…”

Section: Introductionmentioning

confidence: 99%

“…Factors influencing the rate of carbonation include relative humidity (RH), temperature, porosity, cement type and CO 2 concentration (cCO 2 ), pressure, duration, etc. The influence of RH at constant cCO 2 of 3% was studied by Suda et al 12,13 . Galan et al.…”

Section: Introductionmentioning

confidence: 99%

Accelerated carbonation of hardened cement paste: Quantification of calcium carbonate via ATR infrared spectroscopy

Kalkreuth,

Ullrich,

Garbev

et al. 2023

J Am Ceram Soc.

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In context of carbon capture and storage in cement and concrete industry, there is a strong demand for fast, reliable, and low‐cost CO2 quantification methods. Attenuated total reflection infrared spectroscopy (ATR‐IR) in conjunction with multivariate calibration via partial‐least‐squares regression was applied to quantify CaCO3 in carbonated hardened Portland cement pastes, as this method shows great potential in the field of process control. Thermogravimetric analysis coupled with infrared spectrometry for the detection of the evolving gases was used as a reference for quantification. Three methods for the quantitative analysis with different partial‐least‐squares parameters were developed on a series of ground physical mixtures of slightly carbonated and highly carbonated hydrated cement pastes that had absorbed up to 77% of the theoretical capacity for CO2. Additional samples for optimization and validation of the method were prepared by accelerated carbonation of cylindrical slices of hardened cement paste as a function of exposure time. In these experiments, the major CO2 uptake occurs in the first 60 min until the formation of CaCO3 layers limits the diffusion of CO2 and Ca2+ ions. The developed partial‐least‐squares models provided low estimation errors of max. 1.5 wt% and high correlation coefficients above 99.5%. The validation covers a concentration range of 20–48 wt% of CaCO3. Limitations of the method are discussed.

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“…In practice, carbonation is one of the most detrimental degradation phenomenon for concrete durability as it induces uniform corrosion of the reinforcing steel bars [56][57][58] . This degradation involves the coupling of several processes: gaseous migration and dissolution; mineral dissolution and precipitation as well as porosity evolution 59 ; release, evaporation and transport of water 60 ; solid phase shrinkage [61][62][63] and tensile stresses leading to the appearance of cracks [64][65][66] . Seigneur et al 60 have shown that reactive transport modelling alone was not able to reproduce the observed degradation depths and the reaction fronts as soon as a crack pattern was observable.…”

Section: Introductionmentioning

confidence: 99%

A fully coupled Hydraulic Mechanical Chemical approach applied to cementitious material damage due to carbonation

et al. 2023

View full text Add to dashboard Cite

Coupled Thermal-Hydraulic-Mechanical-Chemical (THMC) approaches may be important for assessing the long-term durability of cementitious materials. We present a multiphysics approach to overcome past limitations of THMC modelling and validate it based on experimental results of accelerated carbonation tests. Our numerical approach rests on a sequential coupling between Hytec and Cast3m. Hytec computes the evolution of hydraulic and mineralogical fields allowing to compute the micromechanical properties (e.g. Young’s modulus). The mineral reactions generate tensile stresses and Cast3M computes the associated strain tensors and the damage evolution represented by the opening or sealing of cracks, impacting subsequent reactive transport processes. Our approach manages to qualitatively represent the crack patterns and non-uniform degradation depths observed on microtomographic images of carbonated cement samples, which can only be explained by the coupled dynamics of chemical and mechanical processes. Our approach can be extended to a wide range of cement-concrete pathologies and contexts.

show abstract

Effect of Relative Humidity on Carbonation Shrinkage and Hydration Product of Cement Paste

Cited by 5 publications

References 14 publications

A coupled hydro-chemo-mechanical approach to model the degradation and appearance of cracks in cementitious materials subject to carbonation

A coupled hydro-chemo-mechanical approach to model the degradation and appearance of cracks in cementitious materials subject to carbonation

Accelerated carbonation of hardened cement paste: Quantification of calcium carbonate via ATR infrared spectroscopy

A fully coupled Hydraulic Mechanical Chemical approach applied to cementitious material damage due to carbonation

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