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Featured researches published by Bertrand Ruot.


9th CANMET [Canada Centre for Mineral and Energy Technology] /ACI [American Concrete Institute] (International Conference on Superplasticizers and other Chemical Admixtures in Concrete) | 2009

Influence of Cellulose Ether Particle Size on Water Retention of Freshly Mixed Mortars

Laetitia Patural; Alexandre Govin; Bertrand Ruot; Olivier Devès; Philippe Grosseau

This paper describes how cellulose ethers are polymers frequently introduced into mortar formulations to improve water retention capacity and workability of the freshly-mixed materials. Physico-chemical parameters of these admixtures (molecular weight, granulometry, substitution degrees, etc.) seem to have a strong influence on mortar water retention capacity. In this paper, the influence of cellulose ether particle size was studied. Two behaviors were highlighted regarding the particle size effect on mortar water retention. On the one hand, for cellulose ethers providing intermediate water retention, this parameter is fundamental: the thinner the particles, the better the water retention. The increase in water retention was explained by the rate of dissolution of every fraction which was faster for the thinnest particles. On the other hand, for admixtures providing strong water retention, the effect of this parameter was weaker or not relevant. Indeed, a cellulose ether concentration threshold was noticed, justifying this behavior.


Solar Energy | 2009

TiO2-containing cement pastes and mortars: Measurements of the photocatalytic efficiency using a rhodamine B-based colourimetric test

Bertrand Ruot; Arnaud Plassais; Francois Olive; Laurent Guillot; Laurent Bonafous


Cement and Concrete Research | 2011

Cellulose ethers influence on water retention and consistency in cement-based mortars

Laetitia Patural; Philippe Marchal; Alexandre Govin; Philippe Grosseau; Bertrand Ruot; Olivier Devès


Cement and Concrete Research | 2010

Some aspects of cellulose ethers influence on water transport and porous structure of cement-based materials

Jérémie Pourchez; Bertrand Ruot; Johan Debayle; E. Pourchez; Philippe Grosseau


International Biodeterioration & Biodegradation | 2012

Influence of the intrinsic characteristics of mortars on biofouling by Klebsormidium flaccidum

Thu Hien Tran; Alexandre Govin; René Guyonnet; Philippe Grosseau; Christine Lors; Eric Garcia-Diaz; Denis Damidot; Olivier Devès; Bertrand Ruot


Cement and Concrete Research | 2006

HEC influence on cement hydration measured by conductometry

Jérémie Pourchez; Philippe Grosseau; René Guyonnet; Bertrand Ruot


Cement and Concrete Research | 2010

Changes in C3S Hydration in the Presence of Cellulose Ethers

Jérémie Pourchez; Philippe Grosseau; Bertrand Ruot


Cement and Concrete Research | 2010

A pulsed field gradient and NMR imaging investigations of the water retention mechanism by cellulose ethers in mortars

Laetitia Patural; Patrice Porion; Henri Van Damme; Alexandre Govin; Philippe Grosseau; Bertrand Ruot; Olivier Devès


Cement and Concrete Research | 2012

Nuclear magnetic relaxation dispersion investigations of water retention mechanism by cellulose ethers in mortars

Laetitia Patural; Jean-Pierre Korb; Alexandre Govin; Philippe Grosseau; Bertrand Ruot; Olivier Devès


International Biodeterioration & Biodegradation | 2013

Avrami's law based kinetic modeling of colonization of mortar surface by alga Klebsormidium flaccidum

Thu Hien Tran; Alexandre Govin; René Guyonnet; Philippe Grosseau; Christine Lors; Denis Damidot; Olivier Devès; Bertrand Ruot

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Philippe Grosseau

École Normale Supérieure

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A. Aït-Mokhtar

University of La Rochelle

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