Hydration kinetics modeling of Portland cement considering the effects of curing temperature and applied pressure

Lin, Feng; Meyer, Christian

doi:10.1016/j.cemconres.2009.01.014

Cited by 229 publications

(93 citation statements)

References 25 publications

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“…Based on this model, and the oxide analysis of the cementitious materials used in the experimental programme (Table 2) approximately, the degree of hydration over the time-scale 7-days to 180-days (Hewlett, 1998;Lin and Meyer, 2009). It is evident from Figure 7 that hydration has little effect on the pore-water conductivity, particularly at the higher w/b ratio where the conductivity remains virtually constant.…”

Section: Hydroxyl (Oh -mentioning

confidence: 93%

A durability performance-index for concrete: developments in a novel test method

McCarter¹,

Chrisp²,

Starrs³

et al. 2015

IJSTRUCTE

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Section: Hydroxyl (Oh -mentioning

confidence: 93%

A durability performance-index for concrete: developments in a novel test method

McCarter¹,

Chrisp²,

Starrs³

et al. 2015

IJSTRUCTE

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“…First, the maximum DOH under the given conditions is calculated from Eq. 1-4 according to the work by Lin et al (Lin et al 2009), which majorly depends on the Blaine fineness of cement clinker, water-to-cement ratio and curing temperature. Then, the overall DOH is obtained by calculating the weighted average of DOH of the four major cement compounds including C3S, C2S, C3A and C4AF.…”

Section: Hydration Modulementioning

confidence: 99%

Modelling the degradation of mechanical properties of cementitious materials under leaching

Zhang¹

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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The calcium leaching of hydrated cement system when in contact with external solution has long been recognised as a critical problem for cementitious materials, and it can result in degradations on mechanical properties. In this research, an integrated numerical scheme is developed to simulate the degradation of Young's modulus of cementitious materials under leaching. Firstly, a cement hydration module is proposed and employed to predict the characteristics of the hydrated cement including pore structures, contents of hydrates and concentrations of initial interstitial solution. Then the hydration data obtained are incorporated into a coupled reactive diffusion procedure to evaluate the change of hydrate contents under the prescribed boundary conditions. Finally, a micromechanical approach, Mori-Tanaka method, is employed to evaluate the degradation of Young's modulus of the cementitious material. The accelerated leaching tests in 6M (6 mol L ⁄ ) of ammonium nitrate solution, which became popular recently in view of the extremely slow degradation kinetics of leaching in deionized water, are studied numerically in this study. The developed numerical scheme is employed to model two experiments, and the good agreements between the numerical results and the experimental measurements in terms of hydration outputs, leaching profiles and Young's moduli, demonstrate the applicability and accuracy of the proposed numerical scheme.

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“…D'autre part une augmentation de la finesse offre une ouvrabilité satisfaisante car le clincker adhère mieux au calcaire et la demande en eau diminue par rapport à celle du ciment portland [5]. Aussi la composition chimique d'un ciment est le facteur le plus important qui influence l'hydratation [6]. L`utilisation des fillers augmente le taux d`hydratation [7].…”

Section: Introductionunclassified

“…En outre un ciment fin possède une grande surface spécifique avec une large surface de contact avec l'eau ce qui augmente le taux d'hydratation, ainsi les produits hydratés seront de faible épaisseur autour des particules de ciment anhydre et causent une élévation du degré d'hydratation [6]. D'après une étude de recherche, un ciment contenant les particules fines du filler calcaire montre un temps de prise court [9], mais Voglis et al [4] ont déclaré que l`addition calcaire accélère le début de prise et retarde la fin de prise, par conséquent le temps de prise est prolongé par rapport à celui du ciment portland.…”

Section: Introductionunclassified

Effect of cement fineness and polycarboxylate dosage on the rheological and mechanical behavior of a mortar

Zahia

Ezziane

2018

MATEC Web Conf.

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Abstract. The use of certain organic additives in the production of mortar and concrete influences the workability and the hydration kinetic of mortar. This results in a modification of some properties, namely rheological behavior and mechanical strength. The objective of this work is to evaluate the rheological and mechanical behavior of a mortar by varying the fineness of the cement and using the superplasticizer Polycarboxylate.

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Hydration kinetics modeling of Portland cement considering the effects of curing temperature and applied pressure

Cited by 229 publications

References 25 publications

A durability performance-index for concrete: developments in a novel test method

A durability performance-index for concrete: developments in a novel test method

Modelling the degradation of mechanical properties of cementitious materials under leaching

Effect of cement fineness and polycarboxylate dosage on the rheological and mechanical behavior of a mortar

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