Journal ArticleDOI
Alite dissolution and C-S-H precipitation rates during hydration
TLDR
In this paper, an extensive dataset suitable for kinetic calculations was collected for the hydration of monoclinic alite at water to solid ratios of 10 and 0.5, and reaction rates for the two kinetic steps alite dissolution and C-S-H precipitation were calculated from this dataset and compared to the measured reaction rates.About:
This article is published in Cement and Concrete Research.The article was published on 2019-01-01. It has received 47 citations till now. The article focuses on the topics: Reaction rate & Precipitation (chemistry).read more
Citations
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Journal ArticleDOI
Advances in understanding cement hydration mechanisms
TL;DR: In this article, the authors reviewed the hydration mechanisms of alite and Portland cement and found that the main heat evolution peak hydration is dominated by the growth of outer C-S-H with a spiky or needle-like morphology.
Journal ArticleDOI
Application of thermodynamic modelling to hydrated cements
TL;DR: In this article, the effect of binder composition on hydrate assemblage in modern Portland composite cements and its effect on durability is investigated using thermodynamic models and modelling approaches.
Journal ArticleDOI
Preparation for micro-lithium slag via wet grinding and its application as accelerator in Portland cement
TL;DR: In this paper, the physical-chemical properties of micro-lithium slag (micro-LS) were characterized comprehensively, and its compressive strength at 16h, 1day, and 28 days was measured.
Journal ArticleDOI
Recent advance of chemical admixtures in concrete
TL;DR: In this article, the conformational properties of PCE molecules both in solution and on the surface of cement have been studied by computational simulations and their effect on the compatibility and rheological properties of cementitious materials is discussed.
Journal ArticleDOI
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
TL;DR: In-situ XRD, heat flow calorimetry, pore water analysis and 1H NMR were used in order to gain more detailed understanding for cement hydration within the first hours of hydration as mentioned in this paper.
References
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ReportDOI
User's guide to PHREEQC (Version 2)-a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations
David L. Parkhurst,C.A.J. Appelo +1 more
TL;DR: PHREEQC as discussed by the authors is a C program written in the C programming language that is designed to perform a wide variety of low-temperature aqueous geochemical calculations.
Journal ArticleDOI
Mechanisms of cement hydration
Jeffrey W. Bullard,Hamlin M. Jennings,Richard A. Livingston,André Nonat,George W. Scherer,Jeffrey Schweitzer,Karen Scrivener,Jeffrey J. Thomas +7 more
TL;DR: The current state of knowledge of cement hydration mechanisms is reviewed, including the origin of the period of slow reaction in alite and cement, the nature of the acceleration period, the role of calcium sulfate in modifying the reaction rate of tricalcium aluminate, the interactions of silicates and aluminates, and the kinetics of the deceleration period as mentioned in this paper.
Journal ArticleDOI
The nature of C-S-H in hardened cements
TL;DR: In this paper, the morphology, composition, and nanostructure of C-S-H in a range of hardened cements were investigated. But the authors focused on the inner product (Ip) of a slag-based mixture of Portland cement and slag.
Journal ArticleDOI
Advances in understanding hydration of Portland cement
TL;DR: In this paper, the growth of C-S-H is the principal factor controlling the main heat evolution peak and after several days space becomes the major factor controlling hydration, but deceleration cannot be attributed to diffusion control.
Journal ArticleDOI
Hydration of cementitious materials, present and future
Karen Scrivener,André Nonat +1 more
TL;DR: In this article, the authors discuss the underlying principles of hydration and recent evidence for the mechanisms governing this process in both Portland cements and other cementitious materials, and the impact of supplementary materials on hydration considered.