SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology最新文献

Development of Lightweight Roadside Safety Barriers using Foaming Admixture: Phase I - Properties of Flue Gas Desulfurization (FGD) Cellular Concrete 使用发泡外加剂的轻型路边安全护栏的开发:第一阶段——烟气脱硫(FGD)泡沫混凝土的性能

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18739

C. Shon, D. Saylak, D. Zollinger, A. K. Mukhopadhyay

引用次数: 0

Efflorescence of Concrete Products for Interlocking Block Pavements 连锁块状路面混凝土制品的风化

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18740

H. Nhar, Takeshi Watanabe, C. Hashimoto, S. Nagao

引用次数: 2

Evaluating Drying Shrinkage of Self-Compacting Concrete in a Caisson Using Numerical Methods 用数值方法评价沉箱中自密实混凝土的干燥收缩

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18745

T. H. Liu, How-Ji Chen, H. Liao, C. I. Lin

{"title":"Evaluating Drying Shrinkage of Self-Compacting Concrete in a Caisson Using Numerical Methods","authors":"T. H. Liu, How-Ji Chen, H. Liao, C. I. Lin","doi":"10.14359/18745","DOIUrl":"https://doi.org/10.14359/18745","url":null,"abstract":"Self-Compacting Concrete (SCC), characterized by the high flowability and high resistance to segregation, is due to the high amount of paste (including cement and mineral admixtures) in contrast with normal concrete (NC). However, the high amount of paste will limit the volume fractions of coarse aggregate and reduce tendency of coarse aggregate to suppress drying shrinkage deformations. For this reason, SCC can be expected to produce higher values of drying shrinkage than NC. In order to assess the drying shrinkage of SCC quantitatively for application to offshore caisson foundations, the formulas presented in this paper are used to predict the values of drying shrinkage in SCC according to the corresponding mixture proportioning. Additionally, a finite element (FE) model, which assumes concrete to be a homogeneous and isotropic material and follows the actual size and environmental conditions of the caisson, is utilized to simulate situations of stress distribution and deformations in the SCC caisson resulting from the drying shrinkage. The likelihood of cracking and the behavior of drying shrinkage of the SCC caisson are drawn from the analytic results calculated by the FE model proposed in this paper.","PeriodicalId":319247,"journal":{"name":"SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132049471","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

Plastic Shrinkage Reduction Potential of a New High Tenacity Monofilament Polypropylene Fiber 一种新型高强单丝聚丙烯纤维的塑性收缩潜力

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18742

Ramakrishnan, R. Zellers, A. Patnaik

引用次数: 8

HIPERPAV® Case Studies: Forensic and Proactive Applications of Innovative Software for Assessing Uncontrolled Cracking Potential in Concrete Pavements HIPERPAV®案例研究:用于评估混凝土路面不受控制的开裂潜力的创新软件的法医和主动应用

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18747

G. Kurgan, G. Crawford, J. I. Mullarky, S. Vanikar, J. Ruiz, D. Rozycki

{"title":"HIPERPAV® Case Studies: Forensic and Proactive Applications of Innovative Software for Assessing Uncontrolled Cracking Potential in Concrete Pavements","authors":"G. Kurgan, G. Crawford, J. I. Mullarky, S. Vanikar, J. Ruiz, D. Rozycki","doi":"10.14359/18747","DOIUrl":"https://doi.org/10.14359/18747","url":null,"abstract":"The balance between productive construction operations and a quality final product is a constant challenge facing today’s owners and contractors. In the pavement industry, innovative technologies such as the HIPERPAV®II system allow this balanced goal to be obtainable. The software is also a viable option for addressing forensic studies of premature distress. The software is also a viable option for addressing forensic studied of premature distress. Both proactive and forensic applications are addressed in this paper through the use of case studies. HIPERPAV® models the impact of specific construction operations, concrete mixtures, geometric design, and environmental factors on early age strength and stress development during the construction phase. These combined factors in addition to the traffic loading affect the overall long-term performance of the pavement. The first three case studies review the proactive scheduling of the sawing operations, changes that can be made to minimize the risk of high thermal stresses when a cold front is expected soon after concrete placement, and the time of concrete placement during high temperature conditions. The last case study addresses a forensic investigation where the effect of coarse aggregate type on a continuously reinforced concrete pavement (CRCP) is determined. All case studies emphasize the influence of HIPERPAV®II during the construction planning phase or the usefulness of the software in a forensic investigation.","PeriodicalId":319247,"journal":{"name":"SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127045933","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

Validity of 0.45 Power Chart in Obtaining the Optimized Aggregate Gradation for Improving the Strength Aspects of High-Performance Concrete 0.45功率图在获得优化骨料级配提高高性能混凝土强度方面的有效性

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18746

R. Panchalan, V. Ramakrishnan

{"title":"Validity of 0.45 Power Chart in Obtaining the Optimized Aggregate Gradation for Improving the Strength Aspects of High-Performance Concrete","authors":"R. Panchalan, V. Ramakrishnan","doi":"10.14359/18746","DOIUrl":"https://doi.org/10.14359/18746","url":null,"abstract":"This paper presents the results of an experimental investigation to determine the validity of 0.45-power chart in obtaining the optimized aggregate gradation for improving the strength characteristics of high-performance concrete (HPC). Historically, the 0.45 power chart has been used to develop uniform gradations for asphalt mixture designs. However, it has now been widely used to develop uniform gradations for portland cement concrete mixture designs. Some reports have circulated in the industry that plotting the sieve opening raised to the 0.45 power chart has been evaluated using quartzite aggregates. Aggregates of different sizes and gradations were blended to exactly fit the gradations of curves raised to 0.35, 0.40, 0.45, 0.50 and 0.55. Five mixtures, which incorporated the aggregate gradations of the five power curves, were made and tested for compressive strength and flexural strength. A control mixture was also made whose aggregate gradations did not match the straight-line gradations of the 0.45 power curve. This was done by using a single size aggregate and sand. The water-cement ratio and the cement content were kept constant for all six mixtures. The results showed that the mixture incorporating the 0.45 power chart gradations gave the highest strength when compared to other power charts and the control concrete. Thus the 0.45 power curve can be adopted with confidence to obtain the densest packing of aggregates and it may be universally applicable for all aggregates.","PeriodicalId":319247,"journal":{"name":"SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114169725","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: 7

Optimizing Reactive Powder Concrete Mixtures for Producing Thin Precast Elements 优化生产薄型预制构件的活性粉末混凝土混合物

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18743

Corinaldesi, G. Moriconi

引用次数: 0

An Experimental Evaluation of the Compatibilty of NSF and PCE Superplasticizers with Different Cement Types NSF和PCE减水剂与不同水泥类型相容性的实验评价

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18748

L. Coppola, P. Marcassoli, S. Lorenzi

{"title":"An Experimental Evaluation of the Compatibilty of NSF and PCE Superplasticizers with Different Cement Types","authors":"L. Coppola, P. Marcassoli, S. Lorenzi","doi":"10.14359/18748","DOIUrl":"https://doi.org/10.14359/18748","url":null,"abstract":"This paper deals with variability in the performance of seven different superplasticizers that were chosen among those of most common use belonging to the naphthalene (NSF) and polycarboxylate-based (PCE) families. In particular, compatibility of two naphthalene-based and five polycarboxylate-based admixtures with six different cements available on the Italian market was evaluated by measuring water reduction to manufacture mortars with the same workability at the end of mixing. Two different lots of the same cement (same plant) were used: lot 1 and 2 produced, on September 2005 and March 2006 respectively. Flow attention up to sixty minutes and tendency to entrap air in the mortars were measured. Results confirmed that the average water reduction and flow retention properties are better for PCE compare to NSF superplasticizers. However, experimental data confirm as the performance of PCE admixtures are more strongly dependent on the cement type than those of NSF polymers. No differences were detected in terms of the air entrapped between the two superplasticizer families, except for the ACR(5) superplasticizer.","PeriodicalId":319247,"journal":{"name":"SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125350162","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

The Effect of Metakaolin and Silica Fume on the Properties of Lightweight Self Consolidating Concrete 偏高岭土和硅粉对轻质自固结混凝土性能的影响

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18741

M. Hubertová, R. Hela

引用次数: 39

"Optimization of Mixture Proportions of Normal, High-Performance and Self-Compacting Concrete" 普通、高性能和自密实混凝土配合比的优化

SP-243: 9th Canmet/ACI Int Conference on Recent Advances in Concrete Technology Pub Date : 2007-04-01 DOI: 10.14359/18744

B. Persson

引用次数: 0