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Marc-André Bérubé

Bio: Marc-André Bérubé is an academic researcher from Laval University. The author has contributed to research in topics: Alkali–silica reaction & Alkali–aggregate reaction. The author has an hindex of 25, co-authored 54 publications receiving 2011 citations.


Papers
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01 Jan 1987
TL;DR: In this article, the authors report the results from the condition survey of about 300 concrete structures of the Quebec city area, with a significant proportion of them showing signs of deterioration commonly associated with alkali-aggregate reactions.
Abstract: This paper reports the results from the condition survey of about 300 concrete structures of the Quebec city area, with a significant proportion of them showing signs of deterioration commonly associated with alkali-aggregate reactions. Each component of these structures has been described according to the more common defects affecting concrete structures and to exposure conditions. Core samples have been taken in about 70 structures and investigated for physico-mechanical properties, air and chloride contents. Each sample has also suffered a petrographic examination. This study has been done to determine the present condition of these structures, to recognize the occurrence and the severity of the major defects affecting them and mainly to establish the influence of the alkali-aggregate reactivity on deteriorations. (Author/TRRL)

3 citations

01 Jan 1988
TL;DR: In this paper, the causes of concrete structures from the Quebec city area were investigated and the main objectives were to recognize the principal defects and their severity, to determine if there is a relationship between the occurence of such defects, the age of the structure and the exposure conditions, and to establish the influence of the alkali-aggregate reactivity on the deterioration process.
Abstract: The aggregates in concrete are subject to a highly alkaline environment, in which some mineral phases, generally stable in normal environmental conditions, can produce significant deterioration as a result of deleterious chemical reactions commonly called alkali-aggregate reactions. This study was initiated to establish the causes of deterioration of concrete structures from the Quebec city area. The main objectives were: 1) to recognize the principal defects and their severity, 2) to determine if there is a relationship between the occurence of such defects, the age of the structure and the exposure conditions, and 3) to establish the influence of the alkali-aggregate reactivity on the deterioration process. Over 300 concrete structures were surveyed. Although all the structures showed at least one type of defect, the severity of deterioration was considered to be modest. Much of the deterioration could be attributed to wetting and drying cycles, and freezing and thawing cycles. Signs of alkali-silica reactivity were present in numerous concrete samples containing limestone aggregates, but petrographic observations suggest that this single phenomenon is probably not the only factor responsible for the early development of map-cracking shown on the exposed components. Even in the absence of alkali-aggregate reactions, limestone aggregates have proven to be sensitive to severe weather conditions, including the application of deicing salts. More research is recommended to explain these behaviours. For the covering abstract ofthe conference see IRRD 807201.

2 citations

Journal ArticleDOI
TL;DR: In this paper, a methodologie d'inventaire des granulats du Quebec a ete elaboree a partir des methodes mises au point en Norvege et en Ontario (Canada).
Abstract: La methodologie d'inventaire des granulats du Quebec a ete elaboree a partir des methodes mises au point en Norvege et en Ontario (Canada). Ces regions ont des conditions geologiques semblables a celles du Quebec. L'inventaire des granulats est effectue en considerant les depots de granulats comme des gisements zones selon certains criteres de qualite: quantite qualite des granulats et exploitabilite. Il est difficile de classer selon un seul critere d'utilisation, ainsi les classes derivees du systeme d'evaluation sont limitees a trois. Les reserves sont evaluees en tenant compte des secteurs deja exploites, des zones urbaines et protegees. Les donnees de bases utilisees sont celles provenant des travaux de cartographie du Quaternaire, de la roche en place et des ressources en eau souterraine. Les travaux de terrain sont limites a la visiste de certaines gravieres afin d'echantillonner les facies typiques. Les bases de donnees sur les caracteristiques des granulats des autres agences gouvernementales sont aussi incorporees dans la base de donnees de l'inventaire des granulats d'une region. Cette base de donnees est informatisee a l'aide d'un programme developpe avec le progiciel dBaseIII+pour IBM PC. La methodologie d'inventaire a ete verifiee sur le terrain a partir de deux regions precises: Val d'Or et Quebec sur des feuillets au 1∶50 000.
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TL;DR: In this article , the effects of the laboratory mixer type and mixing time on a hot-mix asphalt (HMA) using three different types of mixers and four different mixing times were examined.
Abstract: This study examined the effects of the laboratory mixer type and mixing time on a hot-mix asphalt (HMA) using three different types of mixers and four different mixing times. The asphalt mix used is a semi-open graded mix (ESG-10) with 30% reclaimed asphalt pavement (RAP), and a range of tests were conducted including bitumen extraction by ignition, particle size distribution, maximum specific gravity (Gmm), a SUPERPAVE gyratory compactor (SGC), bulk specific gravity (Gmb), indirect tensile stiffness modulus (ITSM), and indirect tensile strength (IDT). The statistical analysis of variance (ANOVA) was also applied to quantify the effect of mixer type and mixing time. The results indicated that both mixing type and time had a significant effect on the properties of the HMA (volumetric properties and compactability) and that the type of mixer used also affected the performance of the HMA (stiffness and cracking resistance), with some mixers producing asphalt mixes with better properties than others. The study ultimately demonstrated that it is possible to produce a mix that exhibits good performance and meets or does not meet the compactability specifications depending on the mixer type used.

Cited by
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Journal ArticleDOI
TL;DR: The use of silica-rich SCMs influences the amount and kind of hydrates formed and thus the volume, the porosity and finally the durability of these materials.

1,920 citations

Journal ArticleDOI
TL;DR: In this article, scanning electron microscopy and mercury intrusion porosimetry were used in parallel to identify the structure of a medium sensitivity Champlain clay, and the structure was observed firstly on intac...
Abstract: Scanning electron microscopy and mercury intrusion porosimetry are used in parallel to identify the structure of a medium sensitivity Champlain clay. The clay structure is observed firstly on intac...

504 citations

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TL;DR: In this paper, the relationship between the microstructure and engineering properties of cement-treated marine clay was examined using x-ray diffraction, scanning electron microscopy, pH measurement, mercury intrusion porosimetry, and laser diffractometric measurement of the particle size distribution.
Abstract: This paper examines the relationship between the microstructure and engineering properties of cement-treated marine clay. The microstructure was investigated using x-ray diffraction, scanning electron microscopy, pH measurement, mercury intrusion porosimetry, and laser diffractometric measurement of the particle size distribution. The engineering properties that were measured include the water content, void ratio, Atterberg limit, permeability, and unconfined compressive strength. The results indicate that the multitude of changes in the properties and behavior of cement-treated marine clay can be explained by interaction of four underlying microstructural mechanisms. These mechanisms are the production of hydrated lime by the hydration reaction which causes flocculation of the illite clay particles, preferential attack of the calcium ions on kaolinite rather than on illite in the pozzolanic reaction, surface deposition and shallow infilling by cementitious products on clay clusters, as well as the presence of water trapped within the clay clusters.

451 citations

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TL;DR: In this paper, the strength development in cement-stabilized silty clay is analyzed based on microstructural considerations, which includes water content, curing time, and cement content.

447 citations

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TL;DR: In this paper, a review of ground granulated blast furnace slag (GGBFS) utilization and efficiency on the properties of mortar/concrete is presented, including workability, setting time, bleeding, rheological properties, slump loss, segregation resistance and early age cracking potential and finishability.

437 citations