"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference"最新文献_第5页

Properties of Carbon-Steel and Polypropylene-Steel Hybrid Fiber Concrete in Low-Volume Fraction Range 低体积分数范围内碳钢和聚丙烯钢混杂纤维混凝土的性能

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference" Pub Date : 2001-06-01 DOI: 10.14359/10611

P. Stroeven, Z. Shui, C. Qian, Y. Cheng

引用次数: 8

Strength and Ductility of Concrete Confined by External Wrap 外包层约束下混凝土的强度和延性

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference" Pub Date : 2001-06-01 DOI: 10.14359/10609

S. Mandal, M. A. Mansur

引用次数: 2

Performance of Reinforced Columns Cast with Self-Compacting Concrete 自密实混凝土浇筑钢筋柱的性能研究

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference" Pub Date : 2001-06-01 DOI: 10.14359/10592

M. Sonebi, P. Bartos

{"title":"Performance of Reinforced Columns Cast with Self-Compacting Concrete","authors":"M. Sonebi, P. Bartos","doi":"10.14359/10592","DOIUrl":"https://doi.org/10.14359/10592","url":null,"abstract":"This paper compares the structural performance of full-scale (300 x 300 x 3000 mm) columns cast using ordinary concrete and self-compacting (SCC) concretes with stirrup configurations representing different degrees of confinement. SCC and ordinary concretes having compressive strengths of 35 MPa (housing) and 60 MPa (civil engineering) were used to cast a total of eight columns. Two pairs of columns were cast using ordinary concrete and SCC. For each pair of the reinforced columns, one column was tested in uniaxial compression to determine its load carrying capacity, while the other one was used to take core samples to determine the distribution of in-situ compressive strengths along its height. The core results were compared to strengths determined on control cubes cured in standard conditions (water) and in air. In general, the in-situ compressive strengths or SCC were closer to standard cube strength than those of ordinary concrete. The distribution of in-situ properties was found to be more uniform in the case of SCC than that of the ordinary concrete. The compressive strength and the ductility of SCC and the ordinary concrete obtained from the 3-m column tests are also compared in this paper.","PeriodicalId":184301,"journal":{"name":"\"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference\"","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128866552","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: 16

Polymer Modified Concrete with Expanded Polystyrene Grains Reinforced with Polypropylene Fibers 聚丙烯纤维增强聚苯乙烯颗粒膨胀改性混凝土

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference" Pub Date : 1900-01-01 DOI: 10.14359/10596

K. Jankovic, L. Lončar

{"title":"Polymer Modified Concrete with Expanded Polystyrene Grains Reinforced with Polypropylene Fibers","authors":"K. Jankovic, L. Lončar","doi":"10.14359/10596","DOIUrl":"https://doi.org/10.14359/10596","url":null,"abstract":"Lightweight concrete with lower water absorption for thin structural elements was the goal of this investigation. Polypropylene fibers contributed to concrete ductility. For lower bulk density the authors used polystyrene grains. They used polymer modified concrete for realization of better adhesion between concrete and fiber. Polymer membranes cover the micro-fissures which may appear due to shrinkage, so polymer modified concrete has smaller water absorption. The influence of polypropylene fiber and cement quantity on concrete properties is investigated in this paper. Experimental work included several kinds of concrete, made with different cement contents, consistency, quantity of polypropylene fibers and with polymer latex, styrenebutadiene rubber modifier. River aggregate with grain size of up to 8 mm was used. The polymer portland cement concrete properties depend, not only on composition but also on the way of preparation, compacting and curing. Curing includes: 1 day in wet conditions, 6 days in the water followed by 21 days in the air. Compressive and splitting tensile strength and water absorption values are reported. It can be concluded that using polypropylene fibers has a better effect on splitting to compressive strength ratio for concrete with bulk density lower than 1800 kg/m3.","PeriodicalId":184301,"journal":{"name":"\"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference\"","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127093531","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

High-Performance Binders with Reduced Autogenous Shrinkage on the Basis of Fine Cement 在细水泥基础上减少自收缩的高性能粘结剂

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference" Pub Date : 1900-01-01 DOI: 10.14359/10579

Martschuk

引用次数: 0

Chemically Prestressed Precast Concrete Box Culvert with Expansive Additives 含膨胀添加剂的化学预应力预制混凝土箱涵

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference" Pub Date : 1900-01-01 DOI: 10.14359/10577

H. Park, C.-Y. Kim, In-Chul Choi, Sang-Woon Bae, J. Ryu

{"title":"Chemically Prestressed Precast Concrete Box Culvert with Expansive Additives","authors":"H. Park, C.-Y. Kim, In-Chul Choi, Sang-Woon Bae, J. Ryu","doi":"10.14359/10577","DOIUrl":"https://doi.org/10.14359/10577","url":null,"abstract":"This study discusses application of expansive additives for concrete to improve the serviceability of precast box culvert by inducing chemical stress. For this purpose, both expansive concrete slabs and normal concrete slabs are tested to verify the effect of expansive additives. Then the failure tests of the full-scale precast box culverts are carried out and the critical aspects of the structural behavior are investigated. The result of the material tests shows that the optimal proportion of expansive additives is 13% of cement weight, and the properties of expansive concrete are the same as those of normal concrete in that proportion. Both the experimental cracking load and service load of the expansive concrete members are increased in comparison with those of the normal concrete. In addition to the above results, the deformation of expansive concrete member is less than that of normal concrete member, and permanent strain result from cyclic load is decreased. It can be concluded that the use of expansive additives to induce chemical prestress in precast box culvert greatly improves the serviceability.","PeriodicalId":184301,"journal":{"name":"\"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference\"","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129201797","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: 5

Application of High-Performance Concrete in Singapore’s North-East and Changi MRT lines 高性能混凝土在新加坡东北和樟宜地铁线中的应用

"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference" Pub Date : 1900-01-01 DOI: 10.14359/10580

C. Nmai, K. Seow, E. L. Khor, P. Robery

{"title":"Application of High-Performance Concrete in Singapore’s North-East and Changi MRT lines","authors":"C. Nmai, K. Seow, E. L. Khor, P. Robery","doi":"10.14359/10580","DOIUrl":"https://doi.org/10.14359/10580","url":null,"abstract":"In early 1996, the Singapore Government announced its decision to expand the country's mass rapid transit system by building the North-East Line from the World Trade Center in the south of the island to the new towns of Hougang, Sengkang and Punggol in northeastern Singapore. The S$5 b Northeast MRT Line will be approximately 20 km long and it will be built primary underground using precast tunnel-lining segments. The specifications for the precast tunnel lining segments include the use of high-performance concrete with a maximum water-cementitious material ratio of 0.45, a minimum 28-day compressive strength of 60 MPa, and a maximum \"rapid chloride permeability\" value of 1000 coulombs. In addition, the specification included the use of high yield bars with a fused epoxy coating to mitigate corrosion of the reinforcing steel due to chlorides in the groundwater. At the request of the contractor, the specifying agency accepted the use of silica fume and a corrosion inhibitor as an alternate. Thousands of precast, high-performance concrete tunnel-lining segments are currently being produced for the construction of the underground tunnels. In this paper, information on the development of the high-performance concrete mixtures for the tunnel-lining segments, production issues, QA/QC measures that have been implemented to ensure compliance with the specification, and the impact of the high-performance concrete on the construction schedule are presented and discussed. An overview of the northeast MRT Line project is also presented.","PeriodicalId":184301,"journal":{"name":"\"SP-200: Fifth CANMET/ACI Conference on Recent Advances in Concrete Technology-Proceeding, Fifth International Conference\"","volume":"102 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113985099","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