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SP-270: Advances in the Material Science of Concrete最新文献

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Cement-Based Materials Characterization at Nanoscale: Nanoindentation and Ultrasonic Atomic Force Microscopy (AFM) 纳米尺度水泥基材料表征:纳米压痕和超声原子力显微镜(AFM)
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663739
Jae Hong Kim, P. Mondal, Surendra P. Shah
{"title":"Cement-Based Materials Characterization at Nanoscale: Nanoindentation and Ultrasonic Atomic Force Microscopy (AFM)","authors":"Jae Hong Kim, P. Mondal, Surendra P. Shah","doi":"10.14359/51663739","DOIUrl":"https://doi.org/10.14359/51663739","url":null,"abstract":"","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128003851","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}
引用次数: 1
Mechanical Properties and Nanostructure of Cement-Based Materials Reinforced with Carbon Nanofibers and Polyvinyl Alcohol (PVA) Microfibers 碳纳米纤维和聚乙烯醇(PVA)微纤维增强水泥基材料的力学性能和纳米结构
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663743
Z. Metaxa, M. Konsta-Gdoutos, Surendra P. Shah
{"title":"Mechanical Properties and Nanostructure of Cement-Based Materials Reinforced with Carbon Nanofibers and Polyvinyl Alcohol (PVA) Microfibers","authors":"Z. Metaxa, M. Konsta-Gdoutos, Surendra P. Shah","doi":"10.14359/51663743","DOIUrl":"https://doi.org/10.14359/51663743","url":null,"abstract":"Synopsis: There have been numerous studies that have aimed at improving the low tensile strength, stiffness, and toughness of cementitious materials. This study aims to show that all of these characteristics can be greatly improved by the addition of ladder scale reinforcement at the nano and micro scale. Carbon nanofibers (CNFs) as well as polyvinyl alcohol (PVA) microfibers were used as reinforcement. The mechanical properties of the nanocomposites were investigated by fracture mechanics three-point bending test. The microstructure and the morphology of nanocomposite samples were studied using an ultra high resolution scanning electron microscope (SEM). The results clearly illustrate that the incorporation of nanofibers and microfibers greatly improves the flexural strength, Young’s modulus, and toughness of the cement matrix.","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"99 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132123723","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}
引用次数: 69
Improvement of Fresh-State Concrete through Small Additions of Clay 通过少量添加粘土改善新状态混凝土
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663738
N. Tregger, R. Ferron, Mark Beacraft, Jae Hong Kim, K. Kuder, Surendra P. Shah
{"title":"Improvement of Fresh-State Concrete through Small Additions of Clay","authors":"N. Tregger, R. Ferron, Mark Beacraft, Jae Hong Kim, K. Kuder, Surendra P. Shah","doi":"10.14359/51663738","DOIUrl":"https://doi.org/10.14359/51663738","url":null,"abstract":"","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117350585","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}
引用次数: 2
Monitoring Chemical Shrinkage Using Pressure Sensors 使用压力传感器监测化学收缩
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663740
S. Peethamparan, Emily A. Weissinger, Joseph Vocaturo, Jie Zhang, G. Scherer
{"title":"Monitoring Chemical Shrinkage Using Pressure Sensors","authors":"S. Peethamparan, Emily A. Weissinger, Joseph Vocaturo, Jie Zhang, G. Scherer","doi":"10.14359/51663740","DOIUrl":"https://doi.org/10.14359/51663740","url":null,"abstract":"","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128699647","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}
引用次数: 14
X-Ray Nanotomography of Cement Microstructure 水泥微观结构的x射线纳米层析成像
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663735
D. Lange, Yao Jia, Yi Shi Liu
{"title":"X-Ray Nanotomography of Cement Microstructure","authors":"D. Lange, Yao Jia, Yi Shi Liu","doi":"10.14359/51663735","DOIUrl":"https://doi.org/10.14359/51663735","url":null,"abstract":"","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131536774","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}
引用次数: 4
Closed-Form Solutions for Uniaxial Passive Restraint Experiments 单轴被动约束实验的闭型解
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663736
Z. Grasley
{"title":"Closed-Form Solutions for Uniaxial Passive Restraint Experiments","authors":"Z. Grasley","doi":"10.14359/51663736","DOIUrl":"https://doi.org/10.14359/51663736","url":null,"abstract":"","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121038055","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}
引用次数: 9
Applications of Electrical Impedance Methods in Linking Structure of Micro- and Macro-Porous Concretes to Their Transport Properties 电阻抗方法在连接微孔和大孔混凝土结构及其输运特性中的应用
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663737
N. Neithalath, J. Jain
{"title":"Applications of Electrical Impedance Methods in Linking Structure of Micro- and Macro-Porous Concretes to Their Transport Properties","authors":"N. Neithalath, J. Jain","doi":"10.14359/51663737","DOIUrl":"https://doi.org/10.14359/51663737","url":null,"abstract":"","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125970878","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}
引用次数: 3
Internal Curing: Discussion of the Role of Pore Solution on Relative Humidity Measurements and Desorption of Lightweight Aggregate (LWA) 内固化:孔溶液对轻骨料相对湿度测量和解吸作用的探讨
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663741
Javier Castro, P. Lura, F. Rajabipour, R. Henkensiefken, J. Weiss
{"title":"Internal Curing: Discussion of the Role of Pore Solution on Relative Humidity Measurements and Desorption of Lightweight Aggregate (LWA)","authors":"Javier Castro, P. Lura, F. Rajabipour, R. Henkensiefken, J. Weiss","doi":"10.14359/51663741","DOIUrl":"https://doi.org/10.14359/51663741","url":null,"abstract":"Synopsis: Internal curing can be used to counteract the effects of self-desiccation in low watercement ratio mixtures. Internal curing uses prewetted lightweight aggregate (LWA) as a reservoir that can release water as it is needed to keep the hydrating cement paste structure saturated. While many developments have been made in advancing the field of internal curing, this work examines the composition of the early-age pore solution. The effect of the pore solution composition on the relative humidity is also discussed. The paper performs desorption measurements of the lightweight aggregate to better understand how fluid is released from the lightweight aggregate. An approach is suggested to use solutions rather than pure distilled water to improve the relevance of the measurement of desorption at high relative humidities.","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"46 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121953106","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}
引用次数: 21
Quantifying Damage Due to Aggregate Expansion in Cement Matrix 水泥基质中骨料膨胀损伤的量化研究
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663742
M. Pour-Ghaz, J. Weiss
{"title":"Quantifying Damage Due to Aggregate Expansion in Cement Matrix","authors":"M. Pour-Ghaz, J. Weiss","doi":"10.14359/51663742","DOIUrl":"https://doi.org/10.14359/51663742","url":null,"abstract":"Synopsis: Concrete is a composite of aggregates in a cement paste matrix. Dissimilar volume changes in these constituent materials may result in localized stress development. This is particularly problematic when the aggregate expands more than the surrounding paste. This expansion results in tensile stress development in the cement paste matrix which can lead to micro-cracking in the cement paste matrix. These micro-cracks can eventually coalesce and localize in visible cracking. Quantifying this type of damage can be difficult. This paper describes a conceptual model and physical simulation of this damage considering the expansion of polymeric inclusions (i.e., aggregates) in cement paste matrix subjected to temperature changes. Thermal loading (i.e., temperature change) was selected since it provides a method to control the expansion. Physical experiments were performed where continuous length change measurement and acoustic emission measurements were carried out. These experimental methods are used to better understand the mechanics of the damage. The experimental results indicate that a deviation from classical composite behavior occurs when damage develops which can be seen in the length change measurements. This deviation can be used to quantify the extent of damage. A numerical model is used to interpret the experimental results. An Eshelby misfit approach was used to determine the pressure created by the expanding aggregate. This enables the stresses that develop in a composite material to be determined. A linear fracture mechanics failure criterion is used to calculate the onset of damage formation. Results are in agreement with length change measurements and acoustic emission measurements. A composite damage model for direct calculation of the extent of damage from length change measurements is proposed.","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122960853","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}
引用次数: 14
Study of Cement Paste Setting at Microstructural Level 水泥浆体微观结构水平凝结研究
SP-270: Advances in the Material Science of Concrete Pub Date : 2010-03-01 DOI: 10.14359/51663734
G. Venkiteela, Z. Sun
{"title":"Study of Cement Paste Setting at Microstructural Level","authors":"G. Venkiteela, Z. Sun","doi":"10.14359/51663734","DOIUrl":"https://doi.org/10.14359/51663734","url":null,"abstract":"Synopsis: In this study, various fresh cement paste microstructure evolutions were observed during setting in a conventional SEM by employing a new sample technique called Quantomix capsuling system. Individual cement particle and different phases growths were studied quantitatively by using image analysis techniques on observed micrographs. The ASTM C191 method was used to determine the cement pastes setting times and further the developments of different phases in the cement pastes microstructure were studied at various stages of setting. It was observed that irrespective of the water to cement (w/c) ratio, cement particle connectivity plays a major role in Vicat needle settlement (or in cement paste setting); however, it was observed that w/c ratio influences the hydration rate in mixtures. It was also observed that during setting water phase depletion wholly depends on richness of the mixture, whereas solid phase growth is a combined effect of cement particle growth and connectivity.","PeriodicalId":387292,"journal":{"name":"SP-270: Advances in the Material Science of Concrete","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123669028","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}
引用次数: 0
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