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Karen Scrivener

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Publications associées (271)

Factors affecting the reactivity of slag at early and late ages

Mohsen Ben Haha, Karen Scrivener, Yosra Briki

This study investigates the difference between the reactivity of slag in NaOH solution (w/s = 100) and in cement paste (w/b = 0.4). The reactivity of slag is much higher in NaOH solution than in cement paste. When the NaOH solution is saturated with portla ...

Pergamon-Elsevier Science Ltd2021

Limestone Calcined Clay Cements (LC3)

Karen Scrivener, Franco Alberto Zunino Sommariva

The climate emergency requires the adoption of strategies and technologies that effectively reduce CO2 emissions in the short to midterm to keep the global temperature rise below 2 degrees C above pre-industrial levels. Concrete is the substance most consu ...

AMER CONCRETE INST2021

Effect of a novel starch-based temperature rise inhibitor on cement hydration and microstructure development: The second peak study

Karen Scrivener, Alexandre Reda Constantin William Caleb Ouzia, Yu Yan

Temperature rise inhibitor (TRI) modifies the exothermic process of cement hydration at early age and mitigates the buildup of cumulative heat, which sheds new light on solving the thermal cracking issue. After the main hydration peak, a broader "second pe ...

Pergamon-Elsevier Science Ltd2021

Limestone calcined clay cement and concrete: A state-of-the-art review

Karen Scrivener, Shashank Bishnoi, Meenakshi Sharma

This article reviews the rapidly developing state-of-the-art literature available on the subject of the recently developed limestone calcined clay cement (LC3). An introduction to the background leading to the development of LC3 is first discussed. The che ...

Pergamon-Elsevier Science Ltd2021

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

Karen Scrivener, Lionel Sofia, Marie Joshua Tapas

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 ...

Pergamon-Elsevier Science Ltd2021

Screening Regionally Available Natural Resources Andwaste Streams as Potential Supplementary Cementitious Material

Karen Scrivener, Diana Londoño Zuluaga

The usage of industrial by-products and natural resources has already been acknowledged as a viable option for lowering the CO2 emissions in cement production. The utilization of locally available materials as supplementary cementitious material (SCM) pres ...

Springer Nature (Switzerland)2021

Use of scratch tracking method to study the dissolution of alpine aggregates subject to alkali silica reaction

Karen Scrivener, Mahsa Bagheri

Alkali silica reaction (ASR) can significantly affect the service life of concrete. The dissolution of aggregates has a direct impact on gel formation and thus on the macroscopic expansion. The conventional expansion tests and other investigations confirme ...

ELSEVIER SCI LTD2021

The Influence of some calcined clays from Nigeria as clinker substitute in cementitious systems

Karen Scrivener, François Henri Avet, Akindehinde Ayotunde Akindahunsi

This paper examines the possibility of the use of some clays calcined from Nigeria as partial substitutes for clinker in the production of Limestone Calcined Clay Cement (LC3). The clays were calcined in the oven at a temperature of 800 degrees C and for o ...

2020

Effect of temperature on the water content of C-A-S-H in plain Portland and blended cements

Karen Scrivener, François Henri Avet

This study aims to investigate the change with temperature of the water content of the C-(A)-S-H of plain cement (PC) and Limestone Calcined Clay Cement (LC3). The water content was determined by various methods: thermogravimetric analysis (TGA), H-1-nucle ...

Pergamon-Elsevier Science Ltd2020

Factors influencing the sulfate balance in pure phase C3S/C(3)A systems

Karen Scrivener, Franco Alberto Zunino Sommariva

Understanding the sulfate balance mechanism of cement is needed for an effective use of sustainable blended cements. Pure phase systems allow to study the interaction between sulfate and each of the phases involved in early age hydration separately. This p ...

Pergamon-Elsevier Science Ltd2020

The reaction between metakaolin and limestone and its effect in porosity refinement and mechanical properties

Karen Scrivener, Franco Alberto Zunino Sommariva

n limestone calcined clay cements (LC3), more hemicarboaluminate and monocarboaluminate is observed, as compared to other blended cements, from the reaction of metakaolin with limestone. In this study, it is shown that the formation of these carboaluminate ...

Pergamon-Elsevier Science Ltd2020

The impact of calcite impurities in clays containing kaolinite on their reactivity in cement after calcination

Karen Scrivener, Emmanuelle Boehm Courjault, Franco Alberto Zunino Sommariva

The use of supplementary cementitious materials as a partial replacement for Portland cement is the most effective way to reduce the carbon footprint of the concrete industry. Raw clays containing kaolinite (kaolin) are promising substitute materials. In t ...

SPRINGER2020

Effect of a novel starch-based temperature rise inhibitor on cement hydration and microstructure development

Karen Scrivener, Cheng Yu, Alexandre Reda Constantin William Caleb Ouzia, Yu Yan

This study investigates the mechanism by which a novel starch-based admixture named Temperature Rise Inhibitor (TRI) modifying cement hydration and limiting heat evolution. This admixture is designed to avoid thermal cracking of concrete. Depending on the ...

Pergamon-Elsevier Science Ltd2020

Visco-elastic behavior of blended cement pastes at early ages

Karen Scrivener, Pietro Lura, Zhangli Hu, Adrien Jean Régis Maurice Hilaire

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 ...

ELSEVIER SCI LTD2020

Influence of pH on the chloride binding capacity of Limestone Calcined Clay Cements (LC3)

Karen Scrivener, François Henri Avet

The high solution to solid ratio normally used for the measurement of chloride binding isotherms, leads to a leaching of ions and a decrease of pH. To make binding test more representative of on-site conditions, we investigated the influence of the increas ...

Pergamon-Elsevier Science Ltd2020

Environmental impacts and decarbonization strategies in the cement and concrete industries

Karen Scrivener, Aurélie Rosine Favier

The use of cement and concrete, among the most widely used man-made materials, is under scrutiny. Owing to their large-scale use, production of cement and concrete results in substantial emission of greenhouse gases and places strain on the availability of ...

2020

Characterization of interfacial transition zone in concrete prepared with carbonated modeled recycled concrete aggregates

Karen Scrivener

Treatment by accelerated carbonation has been widely studied to enhance the quality of recycled concrete aggregates (RCA) and hence the performance of new concrete produced with the RCA. This is often ascribed to the densification of RCA. This study invest ...

Pergamon-Elsevier Science Ltd2020

Assessing the effect of alkanolamine grinding aids in limestone calcined clay cements hydration

Karen Scrivener, Franco Alberto Zunino Sommariva

Grinding aids are commonly used in cement manufacture to reduce electrostatic forces between powder particles and reduce agglomeration. Alkanolamines are known to also influence the hydration of the aluminate phases in cement. This study assessed the effec ...

2020

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

Cyrille Dunant, Karen Scrivener, Arnaud Müller, Arnaud Charles Albert Muller

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 ...

Pergamon-Elsevier Science Ltd2020

Unravelling chloride transport/microstructure relationships for blended-cement pastes with the mini-migration method

Karen Scrivener, Fabien Jacques Michel Georget, William Wilson

A chloride mini-migration method is proposed to estimate effective diffusion coefficients at the scale of the cement paste and to investigate mechanisms with complementary microstructure analyses on the same material. Blended-cement pastes with a wide rang ...

Pergamon-Elsevier Science Ltd2020

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