SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures最新文献

Production and Testing of Self-Levelling Concrete 自流平混凝土的生产与试验

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5577

J. Ambroise, S. Rols, J. Pera

引用次数: 2

High-Performance Fiber Reinforced Concrete for Mine Roadway Support Panels 矿山巷道支护板用高性能纤维混凝土

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5551

J. Šušteršič, M. Kolenc, A. Zajc, F. Ricek, M. Z. Pogorelcnik

引用次数: 1

Computer Simulation of Paricle Packing in Cementitious Systems 胶凝体系中颗粒充填的计算机模拟

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5564

M. Stroeven, P. Stroeven

引用次数: 4

Influence of Ultra-Fine Particle-Type on Properties of Very High-Strength Concrete 超细颗粒类型对超高强混凝土性能的影响

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5584

S. Rols, M. Mbessa, J. Ambroise, J. Pera

引用次数: 10

Behavior of Normal and High-Strength Behavior High-Strength Concretes During Vibration 高强混凝土与普通混凝土的振动特性研究

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5568

M. Soutos, J. Bungey, M. J. Brizell, G. Henderson

引用次数: 0

Rheological Behavior of Dry-Mix Shotcrete 干喷混凝土流变特性研究

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5552

A. Figueiredo

{"title":"Rheological Behavior of Dry-Mix Shotcrete","authors":"A. Figueiredo","doi":"10.14359/5552","DOIUrl":"https://doi.org/10.14359/5552","url":null,"abstract":"In this study three series of four test panels were molded varying the mortar content. In the three series, the dry-mix shooting process was regulated with three different conditions. In each test panel samples and cores were taken to determine shotcrete mix proportions and physical properties. The results show a good correlation between stiffness and W/C in accordance with the exponential model proposed by Powers, confirming the Proctor needle as a good instrument to dry-mix shotcrete workability control. The compaction and compressive strength were as high as the volume of paste incorporated in the shotcrete. This feature provides a typical dry rheological behavior to the dry-mix shotcrete, where Abram's Law is not valid. It occurs regardless of the fine and coarse aggregates proportion, although the influence of which on rebound is very clear. It is recommended that one should not fix a maximum W/C for a given compressive strength in the dry-mix shotcrete specifications. On the contrary, the consistency measurement by the Proctor needle appears to be a good instrument for dry-mix shotcrete workability control. The use of the aggregates gradation recommended by the ACI is a good way to achieve better shotcreting conditions with a minimum rebound.","PeriodicalId":299049,"journal":{"name":"SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121712745","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

Mechanisms of Actions of Different Superplasticizers For High Performance Concrete 不同高效减水剂对高性能混凝土的作用机理

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5574

S. Collepardi, L. Coppola, R. Troli, M. Collepardi

引用次数: 19

High Strength High Performance Concrete-Using Fly Ash and Superplasticizer Admixture 粉煤灰掺加高效减水剂的高强高性能混凝土

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5565

R. Rivera, R. Davila, A. Durán

{"title":"High Strength High Performance Concrete-Using Fly Ash and Superplasticizer Admixture","authors":"R. Rivera, R. Davila, A. Durán","doi":"10.14359/5565","DOIUrl":"https://doi.org/10.14359/5565","url":null,"abstract":"This paper gives some results of flowing and high strength concretes using type F fly ash (FA) and naphthalene based superplasticizer (SP). In series S, SP was used only to produce flowing concrete and in series H it was used to reduce W/C and to cause the concrete to flow. In each studied series the portland cement content was maintained fixed at 250 kg/(meter cubed). Fly ash was added as a percentage of the normal portland cement from 10% up to 150%. For reference series a 0.8 W/C was used, and for series S, 200 liters of water was used to attain a nominal consistency of 60.0 cm DIN. For reference series H a reduction of 35% of mixing water of series S was used (70 L). To find the maximum amount of FA and SP dosage in series S, SP admixture was used to obtain the reference consistency of 60.0 DIN. In series H where the admixture was used as high-range water-reducing-retarder admixture (HRWRRA) in large dosages, the concrete became very cohesive and significant slump loss was noted. When superplasticizer-retardant admixture (SPRA) was used as HRWRRA to produce flowing concrete under established conditions, it was possible to obtain a very significant compressive strength gain at 56 days, which was the upper limit of the age covered in this study. An increment of 160% (from 25 to 65 MPa) at 56 days was attained for series H in relation to the reference mixture without FA and SP. To obtain high strength concretes using high volumes of fly ash it is essential to use SP admixture.","PeriodicalId":299049,"journal":{"name":"SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122572945","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

Microstructure of Two-Thousand-Year Old Lightweight Concrete 两千年老轻混凝土的微观结构

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5556

R. Rivera-Villarreal, J. Cabrera

引用次数: 5

Oller-Compacted Concrete Incorperating Superplastisizer and Viscous Agent For Pavements 路面用掺加超塑化剂和黏稠剂的压实混凝土

SP-186: High-Performance Concrete: Performance and Quality of Concrete Structures Pub Date : 1999-05-01 DOI: 10.14359/5554

M. Kagaya, H. Tokuda, Y. Inaba

引用次数: 0