The origins and evolution of cement hydration models

Xie, Tiantian; Biernacki, Joseph J.

doi:10.12989/cac.2011.8.6.647

Cited by 19 publications

(22 citation statements)

References 28 publications

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“…Somewhat higher diffusion constants were obtained by Bishnoi and Scrivener (10 -15 -10 -14 m 2 /h) [5] as well as by Xie and Bienacki (1.1 × 10 -13 m 2 /h) [2] when other diffusion models were applied. All these values are significantly lower than that suggested by Bullard who reports the diffusivity of H 2 SiO 4 2-ion to be in the range of 10 -8 -10 -7 m 2 /h [34] .…”

Section: Model Verification: the Effects Of Particle Size Distributionmentioning

confidence: 83%

“…However, it is apparent that Fujii ' s model does not apply to the vicinity of t d (i.e., the assumed transition time from the NG to DC stage) as it predicts the hydration rate to approach infinity [Eq. (2)]. This is due to the mathematical simplification of the model, which assumes the transition from the NG to DC stage occurs instantaneously for a single particle, while in reality this should occur over a period of time.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The hydration of Portland cement is a complex process and many detailed features are still not clearly understood today. Recent reviews of the numerous mathematical models and simulations developed in the past 40 years show that a complete simulation that can accurately simulate both the hydration kinetics and the microstructure development still does not exist [1,2] . This study further explores the possible mechanisms of cement hydration and introduces a new and relatively simplified numerical model (with only three independent parameters) to simulate the hydration kinetics.…”

Section: Introductionmentioning

confidence: 99%

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Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C₃S hydration in dilute suspensions

Pang¹,

Meyer

2014

Science and Engineering of Composite Materials

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A particle-based C 3 S hydration model, which mathematically connects a nucleation and growth controlled mechanism with a diffusion controlled mechanism, is developed in this study. The model is first formulated and fitted with C 3 S hydration in stirred dilute suspensions in Part I where interactions between different particles can be ignored, and further developed and fitted with Portland cement paste hydration in Part II to account for inter-particle interactions. Excellent agreement was observed between experimental and modeled results. Three critical rate-controlling parameters, including a parallel growth rate constant, a perpendicular growth rate constant and a diffusion constant, were identified from the proposed model. The dependencies of these parameters on particle size and initial quantity of nuclei are investigated in Part I while their dependencies on cement composition, water-cement ratio, and curing condition are studied in Part II.

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Section: Model Verification: the Effects Of Particle Size Distributionmentioning

confidence: 83%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C₃S hydration in dilute suspensions

Pang¹,

Meyer

2014

Science and Engineering of Composite Materials

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“…At that time they crafted an idea that would eventually take shape as an international workshop on hydration kinetics, now known as the International Summit on Cement Hydration Kinetics and Modeling [10]. This vision document and five companion papers [1][2][3]5,11] o various aspects of cement hydration are the outcomes of the Summit.…”

Section: In Summarymentioning

confidence: 99%

“…Figure 1. Typical alite calorimetry curve characteristic of C 3 S (triclinic)--based hydraulic cements, data after Xie and Biernacki [11]. Mechanisms define the fundamental steps in a process.…”

Section: III Overviewmentioning

confidence: 99%

Paving the Way for a More Sustainable Concrete Infrastructure : A Vision for Developing a Comprehensive Description of Cement Hydration Kinetics

Biernacki¹,

Bullard²,

Constantiner³

et al. 2013

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Pav i ng t he W ay f or a Mor e S u s t ai nabl e C onc r et e I nf r as t r u c t u r e A V i s i o n f o r D e v e l o p i n g a C o m p r e h e n s i v e D e s c r i p t i o n o f C e m e n t H y d r a t i o n K i n e t i c s National Institute of Standards and Technology Patrick D. Gallagher, Under Secretary of Commerce for Standards and Technology and DirectorCertain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment are necessarily the best available for the purpose. iii iv National Institute of Standards and Technology ForewordConcrete is far and away the most abundantly used man--made material on the planet. As a construction material, it is unique in its capacity to be formed and finished into an almost unlimited variety of shapes, textures, and colors. It can be made on demand with portland cement and inexpensive local materials. With correct placement and use, concrete can have a service life of 50 years to more than 200 years. Improving the proper and efficient use of concrete and portland cement requires better understanding of the chemical process of hydration, and how that process can be characterized and modeled -both for pure portland systems and for those containing admixtures and supplemental cementitious materials such as fly ash, slag cement, and others. Having interactive computer models, based on sound experimental data, for the chemical and physical interaction of cementing compounds, molecules, and ions in the concrete pore--water solutions will help both to improve cement manufacture and to optimize sustainable concrete mixtures.Importantly, concrete has the lowest embodied CO 2 content of any major material used in construction, including glass, steel, and wood. But so much concrete is produced annually that it still accounts for about 8 of industrial CO 2 production. Therefore, reducing both the CO 2 contribution and embodied energy of concrete is a societal challenge that must be addressed to ensure a sustainable built environment and transportation infrastructure. One way to reduce concrete's CO 2 contribution is to lower its embodied CO 2 and energy content and even further, typically by both more efficient production of cement binder and partial replacement with supplementary cementitious materials or fine mineral fillers. This approach is already being used, but often with uncertainty in the way the binder will perform. Concrete is typically overdesigned by at least 10 % because of the inability to ensure the exact performance of the binder material. Therefore, the ability to accurately model cement hydration kinetics and predict and improve the performance of concrete as it hydrates could lead to a 1 % reduction in the mass of cement and concrete used each year and significantly reduc...

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Kinetic study on the hydration of supersulfated cements

Zhu,

Qi,

Kou

2024

J Therm Anal Calorim

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The origins and evolution of cement hydration models

Cited by 19 publications

References 28 publications

Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C₃S hydration in dilute suspensions

Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C₃S hydration in dilute suspensions

Paving the Way for a More Sustainable Concrete Infrastructure : A Vision for Developing a Comprehensive Description of Cement Hydration Kinetics

Kinetic study on the hydration of supersulfated cements

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The origins and evolution of cement hydration models

Cited by 19 publications

References 28 publications

Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C3S hydration in dilute suspensions

Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C3S hydration in dilute suspensions

Paving the Way for a More Sustainable Concrete Infrastructure : A Vision for Developing a Comprehensive Description of Cement Hydration Kinetics

Kinetic study on the hydration of supersulfated cements

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Product

Resources

About

Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C₃S hydration in dilute suspensions

Modeling cement hydration by connecting a nucleation and growth mechanism with a diffusion mechanism. Part I: C₃S hydration in dilute suspensions