Pub Date : 2006-11-01DOI: 10.1080/17747120.2006.9692904
R. Belarbi, A. Aït-Mokhtar, Menghao Qin, Othman Omikrine
ABSTRACT A simple but effective gravimetric method for determining the moisture diffusivity of concrete and cement paste is given in this paper. The method allows calculating the moisture diffusion coefficient and moisture distribution inside building materials purely based on the isothermal gravimetric measurements. The method was also applied to research into the properties of concrete and cement paste. Results indicate that the increase of water-cement ratio in the cement pastes will result in an increase of moisture diffusion coefficient. Furthermore, the experiment also points out the fact that moisture coefficient of concrete based on cement with fly ash additions is lower than that of concrete with OPC.
{"title":"Development of simplified approach to model the moisture transfer in building materials","authors":"R. Belarbi, A. Aït-Mokhtar, Menghao Qin, Othman Omikrine","doi":"10.1080/17747120.2006.9692904","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692904","url":null,"abstract":"ABSTRACT A simple but effective gravimetric method for determining the moisture diffusivity of concrete and cement paste is given in this paper. The method allows calculating the moisture diffusion coefficient and moisture distribution inside building materials purely based on the isothermal gravimetric measurements. The method was also applied to research into the properties of concrete and cement paste. Results indicate that the increase of water-cement ratio in the cement pastes will result in an increase of moisture diffusion coefficient. Furthermore, the experiment also points out the fact that moisture coefficient of concrete based on cement with fly ash additions is lower than that of concrete with OPC.","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134574738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-11-01DOI: 10.1080/17747120.2006.9692906
S. Béjaoui, B. Bary, S. Nitsche, D. Chaudanson, C. Blanc
ABSTRACT This paper presents a review of complementary experimental and modeling studies of the link between microstructure and diffusivity of cement pastes. These studies were performed in the framework of the workgroup Concrete Engineering Barrier headed by Andra. Knowledge of the link between microstructure and diffusivity is needed to run properly the coupled chemical, transport and mechanical models used to assess the long term behavior of concrete in deep repository conditions. The first part of the paper is devoted to a description of the porous texture of ordinary Portland cement pastes, in particular obtained using Transmission Electronic Microscopy. The second and third parts are respectively dedicated to the presentations of an analytical method and a 3D numerical one, both of them aimed at linking microstructure and diffusivity of cement pastes.
{"title":"Experimental and modeling studies of the link between microstructure and effective diffusivity of cement pastes","authors":"S. Béjaoui, B. Bary, S. Nitsche, D. Chaudanson, C. Blanc","doi":"10.1080/17747120.2006.9692906","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692906","url":null,"abstract":"ABSTRACT This paper presents a review of complementary experimental and modeling studies of the link between microstructure and diffusivity of cement pastes. These studies were performed in the framework of the workgroup Concrete Engineering Barrier headed by Andra. Knowledge of the link between microstructure and diffusivity is needed to run properly the coupled chemical, transport and mechanical models used to assess the long term behavior of concrete in deep repository conditions. The first part of the paper is devoted to a description of the porous texture of ordinary Portland cement pastes, in particular obtained using Transmission Electronic Microscopy. The second and third parts are respectively dedicated to the presentations of an analytical method and a 3D numerical one, both of them aimed at linking microstructure and diffusivity of cement pastes.","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125468118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692890
S. Hamlat
{"title":"Apport de la mécanique du contact pneu-chaussée dans la prédiction de l'évolution de la texture de surface d'un revêtement routier","authors":"S. Hamlat","doi":"10.1080/17747120.2006.9692890","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692890","url":null,"abstract":"","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114144353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692876
Yassine Cherif
{"title":"Etude des transferts thermiques couplés dans un système complexe comprenant un milieu fluide type lame d'air","authors":"Yassine Cherif","doi":"10.1080/17747120.2006.9692876","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692876","url":null,"abstract":"","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124689878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692888
E. Grimal
Un certain nombre d'ouvrages de genie civil du parc de production d'EDF, principalement des barrages, presentent des pathologies de gonflement des betons dus a la reaction alcali-granulats (RAG). Afin d'evaluer les marges de securite et de fonctionnement de ces installations, et de maitriser les couts de maintenance, EDF et le Laboratoire Materiaux et Durabilite des Constructions (LMDC) ont developpe un modele numerique, integre dans le code aux elements finis Aster, permettant la simuler le comportement mecanique des structures affectees par la RAG. Le but de ce modele est d'evaluer les deformations et l'endommagement anisotrope (fissuration) des ouvrages atteints. En effet, de recentes recherches experimentales confirment que le gonflement du a la RAG devient fortement anisotrope lorsque l'etat de contrainte devient deviatorique. De plus, la cinetique et l'amplitude de la reaction dependant fortement de la teneur en eau et de la temperature du beton, le modele tient compte de ces phenomenes environnementaux. Par ailleurs, les fluages de compression et de traction jouent un role significatif dans le comportement des ouvrages, ils ont donc ete traites de maniere specifique. Une methode d'identification des parametres du modele est egalement proposee et le modele teste sur une campagne d'essais experimentale recente effectuee sur mini-structure au Laboratoire Central des Ponts et Chaussees (LCPC) ; enfin, le modele est utilise pour modeliser le comportement du barrage de Temple sur Lot.
edf生产园区的一些土木工程结构，主要是大坝，由于碱骨料反应(RAG)，混凝土出现了膨胀的病理。以d’evaluer安全边际和这些设施的运行、维护和控制成本,EDF和实验室的建筑材料和可持续发展(LMDC)签名了数值模型,集成在成品Aster的元素,使代码的投票结构模拟机械性能的抹布。该模型的目的是评估受影响结构的变形和各向异性损伤(开裂)。事实上，最近的实验研究证实，当应力状态偏离时，RAG的胀形变得强烈各向异性。此外，由于反应动力学和振幅很大程度上取决于混凝土的含水量和温度，该模型考虑了这些环境现象。此外，压缩和拉伸蠕变在结构的性能中起着重要的作用，因此对它们进行了特殊处理。此外，还提出了一种识别模型参数的方法，并在laboratorio Central des Ponts et Chaussees (LCPC)最近对微型结构进行的实验测试中对模型进行了测试;最后，利用该模型对洛特神庙大坝的行为进行了建模。
{"title":"Caractérisation des effets du gonflement provoqué par la réaction alcali-silice sur le comportement d'une structure en béton","authors":"E. Grimal","doi":"10.1080/17747120.2006.9692888","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692888","url":null,"abstract":"Un certain nombre d'ouvrages de genie civil du parc de production d'EDF, principalement des barrages, presentent des pathologies de gonflement des betons dus a la reaction alcali-granulats (RAG). Afin d'evaluer les marges de securite et de fonctionnement de ces installations, et de maitriser les couts de maintenance, EDF et le Laboratoire Materiaux et Durabilite des Constructions (LMDC) ont developpe un modele numerique, integre dans le code aux elements finis Aster, permettant la simuler le comportement mecanique des structures affectees par la RAG. Le but de ce modele est d'evaluer les deformations et l'endommagement anisotrope (fissuration) des ouvrages atteints. En effet, de recentes recherches experimentales confirment que le gonflement du a la RAG devient fortement anisotrope lorsque l'etat de contrainte devient deviatorique. De plus, la cinetique et l'amplitude de la reaction dependant fortement de la teneur en eau et de la temperature du beton, le modele tient compte de ces phenomenes environnementaux. Par ailleurs, les fluages de compression et de traction jouent un role significatif dans le comportement des ouvrages, ils ont donc ete traites de maniere specifique. Une methode d'identification des parametres du modele est egalement proposee et le modele teste sur une campagne d'essais experimentale recente effectuee sur mini-structure au Laboratoire Central des Ponts et Chaussees (LCPC) ; enfin, le modele est utilise pour modeliser le comportement du barrage de Temple sur Lot.","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"89 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125997140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692893
Bastien LE HELLO
{"title":"Modélisation expérimentale et numérique des remblais sur sol compressible par pieux et géosynthétiques","authors":"Bastien LE HELLO","doi":"10.1080/17747120.2006.9692893","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692893","url":null,"abstract":"","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133136767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692883
Dalila Feddal
{"title":"Développement d'un calorimètre isotherme pour matériaux très réactifs","authors":"Dalila Feddal","doi":"10.1080/17747120.2006.9692883","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692883","url":null,"abstract":"","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114387804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692864
D. Breysse, O. Abraham
ABSTRACT During three years, experts and practitioners of non destructive evaluation have met under the auspices of AFGC (French Association of Civil Engineering) and COFREND (French Confederation for Non Destructive Testing). Their aim was to prepare a state of the art about non destructive evaluation of reinforced concrete structures. A book has now been issued, amounting about 500 pages, and providing such a State of the Art. It describes the needs and the existing practices. It gives advices for a best use of these non destructive techniques—NDT (when? how? for what?) and helps structural managers, answering their main questions. The book focuses on real case-studies, which show representative illustrations of what are the real problems and how they can be tackled. Thus NDT practitioners as well as structural engineers can also find answers to the their questions. This paper mainly details the sections of the book which are devoted to synthetic files and tables about the techniques.
{"title":"Les techniques d'essais non destructifs pour l'évaluation des ouvrages en béton armé","authors":"D. Breysse, O. Abraham","doi":"10.1080/17747120.2006.9692864","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692864","url":null,"abstract":"ABSTRACT During three years, experts and practitioners of non destructive evaluation have met under the auspices of AFGC (French Association of Civil Engineering) and COFREND (French Confederation for Non Destructive Testing). Their aim was to prepare a state of the art about non destructive evaluation of reinforced concrete structures. A book has now been issued, amounting about 500 pages, and providing such a State of the Art. It describes the needs and the existing practices. It gives advices for a best use of these non destructive techniques—NDT (when? how? for what?) and helps structural managers, answering their main questions. The book focuses on real case-studies, which show representative illustrations of what are the real problems and how they can be tackled. Thus NDT practitioners as well as structural engineers can also find answers to the their questions. This paper mainly details the sections of the book which are devoted to synthetic files and tables about the techniques.","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"124 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124654451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692885
M. Garros
{"title":"Composites cimentaires incorporant des granulats en caoutchouc issus du broyage de pneus usagés: optimisation de la composition et caractérisation","authors":"M. Garros","doi":"10.1080/17747120.2006.9692885","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692885","url":null,"abstract":"","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128227273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-09-01DOI: 10.1080/17747120.2006.9692872
Frédéric Becquart
{"title":"Identification du comportement mécanique des mâchefers Valorisation en techniques routières","authors":"Frédéric Becquart","doi":"10.1080/17747120.2006.9692872","DOIUrl":"https://doi.org/10.1080/17747120.2006.9692872","url":null,"abstract":"","PeriodicalId":368904,"journal":{"name":"Revue Européenne de Génie Civil","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128884381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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