Publications de Karen Scrivener

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Almost all properties of hydrated cementitious materials depend strongly on their pore structure. Many methods to quantify porosity have been applied to cementitious materials, but there is a huge confusion in the literature about the utility of these meth ...

Predicting the evolution of stiffness in cement paste requires linking morphological properties of the microstructure to the evolution of mechanical properties. Measures are typically difficult to obtain with sufficient time resolution to capture the trans ...

A correction to this paper has been published: https://doi.org/10.1617/s11527-020-01558-w ...

This paper studies the effect of temperature on the phase assemblages of belite-ye'elimite cement. A comparison is made between thermodynamic modelling and experimental data at 28 and 180 days of hydration at 5, 20, 40, and 60 degrees C. The fast reaction ...

In this study synchrotron X-ray absorption spectroscopy (XAS) has been applied, an element specific technique which allows Fe-containing phases to be identified in the complex mineral mixture of hydrated cements. Several Fe species contributed to the overa ...

It is known that the addition of supplementary cementitious materials (SCMs) in concretes reduces or even stops expansion due to alkali silica reaction (ASR). It has been widely shown that the main mechanism controlling ASR in blends is the alkali fixation ...

This study aims at elucidating the visco-elastic behavior of hardening blended cement pastes, focusing on uni-axial basic compressive creep tests at early loading ages. Cement pastes with Portland cement only or blended with quartz or fly ash (both at a su ...

The basic nature of alkali hydroxides (NaOH, KOH) when added to mixing water, increases the pH in proportion to the level of salt addition. For alite (impure tricalcium silicate; MIII-Ca3SiO5) hydration, this pH increase accelerates the rate of hydration a ...

The use of calcined clays as supplementary cementitious materials provides the opportunity to significantly reduce the cement industry's carbon burden; however, use at a global scale requires a deep understanding of the extraction and processing of the cla ...

Some of the limitations of the model recently used by Nicoleau in a recent article [Accelerated growth of calcium silicate hydrates: experiments and simulations, Cement Concr. Res. 21 (2011) 1339 - 1348.] are discussed. (C) 2012 Elsevier Ltd. All rights re ...

This study demonstrates the efficacy of supplementary cementitious materials (SCMs) to mitigate alkali-silica reaction (ASR) even when used in conjunction with cement of higher alkali contents (up to 1% Na2Oeq). The expansion of concrete prisms was studied ...

The AFm phase, one of the main products formed during the hydration of Portland and calcium aluminate cement based systems, belongs to the layered double hydrate (LDH) family having positively charged layers and water plus charge-balancing anions in the in ...

Deterioration of cementitious materials by sulfate ions is a concern for concrete in contact with ground water (and in a lesser extent sea water) in many parts of Europe, and is an important issue for underground construction identified as a major area for ...

It is well known that kaolinite dehydroxylate between 600 and 850 °C, and the maximum reactivity is achieved for calcination temperatures of about 800 °C. From an industrial perspective, controlling undercalcination is an easy task, as XRD or TGA could be ...

Sodium gluconate has been shown to compensate the impact of alkalis on the long term strength development of cement pastes. This work studies the impact of sodium gluconate combined with Na2SO4 on the microstructural development of white cement-slag system ...

The filler effect, due to the physical presence of mineral additions in cement, is mainly known to accelerate the hydration of the clinker component. Previously, this was attributed to the surface of the filler providing nucleation sites for C-S-H as there ...

In this paper, we show a new technique to characterize fly ashes using scanning electron microscopy (SEM). Chemical composition of millions of points is measured by SEM-energy dispersive X-ray spectroscopy and plotted in a ternary frequency plot. This new ...

Limestone calcined clay cement (LC3) is a promising material for producing cement with low CO2 emissions and properties similar to, or superior to, those of Portland cement (PC), but at 50 % clinker content (LC3-50). In many applications, lower strengths t ...

New results show that the microstructure development of cement–silica fume blends is very different from plain cement. Portlandite (CH) tends to precipitate as platelets and even around clinker grains as “CH rims” and is consumed by pozzolanic reaction wit ...

Karen Scrivener

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Reconciliation of pore structure characterization methods: The simple case of PC-limestone cement pastes

Microstructural simulation and measurement of elastic modulus evolution of hydrating cement pastes

Understanding the carbonation of concrete with supplementary cementitious materials: a critical review by RILEM TC 281-CCC (vol 53, 136, 2020)

Influence of temperature on phase assemblages of belite-ye'elimite cement

Fe-containing phases in hydrated cements

The influence of aluminium on the dissolution of amorphous silica and its relation to alkali silica reaction

Visco-elastic behavior of blended cement pastes at early ages

The influence of sodium and potassium hydroxide on alite hydration: Experiments and simulations

Clay calcination technology: state-of-the-art review by the RILEM TC 282-CCL

Discussion of the paper "Accelerated growth of calcium silicate hydrates" by Luc Nicoleau

Decoupling method for heat evolution curves of model cements - Influence of the presence of C3A-gypsum on the alite hydration

Efficacy of SCMs to mitigate ASR in systems with higher alkali contents assessed by pore solution method

Hydration states of AFm cement phases

Durability Of Field Concrete Made Of Portland Cement And Supplementary Cementitious Materials Under Several European Exposure Conditions

Towards the Design of an Industry-Suitable Technique to Assess Overcalcination of Kaolinitic Clays

Impact of sodium gluconate on white cement-slag systems with Na2SO4

Understanding the Filler Effect on the Nucleation and Growth of C-S-H

Characterization of Fly Ashes by a Novel Method in the Scanning Electron Microscope

Hydration and phase assemblage of limestone calcined clay cements (LC3) with clinker content below 50 %

Composition of C-S-H in pastes with increasing levels of silica fume addition