"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete"最新文献_第6页

Monitoring Hydration of Alkali-Activated Slag and Fly Ash 碱活性矿渣与粉煤灰水化的监测

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1998-06-01 DOI: 10.14359/6010

H. Ezirim, W. McCarter

引用次数: 3

Mechanical Properties and Durability of Structural Lightweight Concrete Incorporating High Volumes of Fly Ash 掺高量粉煤灰结构轻量混凝土的力学性能和耐久性

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1998-06-01 DOI: 10.14359/5994

A. Bilodeau, V. Malhotra, D. Golden

{"title":"Mechanical Properties and Durability of Structural Lightweight Concrete Incorporating High Volumes of Fly Ash","authors":"A. Bilodeau, V. Malhotra, D. Golden","doi":"10.14359/5994","DOIUrl":"https://doi.org/10.14359/5994","url":null,"abstract":"Canada Centre for Mineral and Energy Technology (CANMET) has an ongoing project dealing with the role of supplementary cementing materials in concrete. As a part of this program, a new type of concrete known as high-volume fly ash concrete has been developed. In this type of concrete, the water and cement contents are kept very low, i.e. about 115 and 155 kg/m to the third power, respectively, and the proportion of low-calcium fly ash is about 56% of the total cementitious materials. This type of concrete has excellent mechanical properties and durability characteristics. The objective of this study was to investigate the application of the high-volume fly ash system to the production of structural lightweight concrete. In this study, high-volume fly ash concrete mixtures were made using ASTM Type I portland cement, fly ashes from sources in the U.S.A. and lightweight coarse aggregates from four different producers, three from the U.S.A., and one from the U.K. A reference concrete mixture without fly ash was also made for comparison purposes. A large number of test specimens were cast to determine the mechanical properties and durability characteristics of the concrete. The test results show that the structural high-volume fly ash concrete had mechanical properties similar to those of the reference concrete. The fly ash concrete generated significantly less heat of hydration, and showed noticeably better resistance to chloride-ion penetration than the reference concrete of similar 28-day strength. All concretes investigated demonstrated an excellent resistance to the freezing and thawing cycle.","PeriodicalId":425482,"journal":{"name":"\"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete\"","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114545698","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

"Pore Structure, Strength and Carbonation of Cement Pastes Containing Ground Granulated Blast-Furnace Slag" 含矿渣粉粒水泥浆的孔隙结构、强度及碳化性能

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1998-06-01 DOI: 10.14359/6013

Congyu Li, A. Yoda, T. Yokomur

{"title":"\"Pore Structure, Strength and Carbonation of Cement Pastes Containing Ground Granulated Blast-Furnace Slag\"","authors":"Congyu Li, A. Yoda, T. Yokomur","doi":"10.14359/6013","DOIUrl":"https://doi.org/10.14359/6013","url":null,"abstract":"This paper describes the test results obtained on the pore structure, strength and carbonation of hardened cement pastes containing ground granulated blast-furnace slag (GGBS). Five different types of ground granulated blast-furnace slag with Blaine finenesses of 400, 800, 1100 and 3000 m squared/kg respectively, are used as a partial replacement for normal portland cement by 15, 30, 50 and 70%. The porosity and threshold radius of hardened cement pastes decrease remarkably with the increases of GGBS fineness at the early ages. They also decrease with the increases of GGBS content, except that of 400 m squared/kg Blaine fineness in the long term. The high fineness GGBS enhances the early strength development of hardened cement paste containing GGBS and reduces its rate of carbonation. It is made clear that the GGBS with Blaine fineness of 1100 m squared/kg is most satisfactory for making the high strength and high durability hardened cement pastes. Furthermore, the effects of the porosity and threshold radius on strength and carbonation of hardened cement paste containing GGBS are examined. Close relationships are observed between strength, carbonation and pore structure of hardened cement paste containing GGBS regardless of GGBS fineness and GGBS content.","PeriodicalId":425482,"journal":{"name":"\"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete\"","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127249649","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

Highly-Flowable Steel Fiber-Reinforced Concrete Containing Fly Ash 含粉煤灰高流动性钢纤维增强混凝土

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1998-06-01 DOI: 10.14359/5977

M. Kurita, T. Nomura

引用次数: 51

Practical Uses for High-Volume Fly Ash Concrete Utilizing a Low Calcium Fly Ash 低钙粉煤灰在大掺量粉煤灰混凝土中的实际应用

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1998-06-01 DOI: 10.14359/5998

W. Langley, G. Leaman

{"title":"Practical Uses for High-Volume Fly Ash Concrete Utilizing a Low Calcium Fly Ash","authors":"W. Langley, G. Leaman","doi":"10.14359/5998","DOIUrl":"https://doi.org/10.14359/5998","url":null,"abstract":"Concrete containing fly ash has been used in many parts of the world for several decades. Various standards and codes have generally limited the use of ASTM Class F fly ash from 20 to 25%. Laboratory studies and field demonstration projects sponsored by CANMET during the last 12 years have shown that concrete containing 55 to 60% fly ash has excellent structural and durability characteristics when proportioned with superplasticizers and at low water to cementing materials ratios. This paper presents some results of research performed under contract to CANMET and some of the practical uses for which the high-volume fly ash concrete system has been utilized in Eastern Canada. The applications discussed include structural concrete, relatively massive machinery foundations, a roller compacted dam, environmental applications such as impermeable shotcrete covers and encapsulation/solidification, and design of mine backfills. The high-volume fly ash system has proven to be an economical construction material which can be mixed, placed and consolidated with conventional concrete construction equipment. Some unique properties such as very low heat generation, low cost, and the possibility to use large quantities of fly ash will expand the future use of the high volume fly ash system.","PeriodicalId":425482,"journal":{"name":"\"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete\"","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129397860","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: 24

Compressive Strength of Portland Blast Furnace Slag Cement Concrete in Adiabatic and Semi-Temperature Matched Curing Conditions 硅酸盐矿渣水泥混凝土在绝热和半温度匹配养护条件下的抗压强度

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1900-01-01 DOI: 10.14359/6012

J. Yang, E. Chen, G. L. Low, B. Tan

引用次数: 0

Effect of Steam Curing on Compressive Strength of Fly Ash Concrete 蒸汽养护对粉煤灰混凝土抗压强度的影响

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1900-01-01 DOI: 10.14359/5978

K. Kohno, Y. Mitsuiwa, Keisuke Ishimaru

引用次数: 1

Mineralogical and Chemical Properties of Mortar Incorporating Coal Ash Produced by Fluidized Bed Combustion 流化床燃烧粉煤灰砂浆的矿物学和化学性质

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1900-01-01 DOI: 10.14359/5993

N. Shintani, T. Saitou, H. Sasaki, T. Kita

{"title":"Mineralogical and Chemical Properties of Mortar Incorporating Coal Ash Produced by Fluidized Bed Combustion","authors":"N. Shintani, T. Saitou, H. Sasaki, T. Kita","doi":"10.14359/5993","DOIUrl":"https://doi.org/10.14359/5993","url":null,"abstract":"A pressurized fluidized bed combustion thermal power plant (PFBC) is a coal-fired thermal power plant specially developed for the enhancement of generating efficiency and the reduction of environmental loads. The physiochemical properties of coal ash produced from this type of power plant (PFBC ash) are different from those ordinary fly ash, because coal is mixed with crushed limestone and burned at a lower temperature than that in the conventional power generation system. This study explores the feasibility of utilizing PFBC ash as a concrete admixture. It has been found that the coal ash from a secondary cyclone dust collector enhances the strength of concrete although it cannot improve the fluidity. A variety of chemical analyses were carried out to explain the reason why the coal ash so produced has such effects. The fly ash obtained from a secondary cyclone dust collector was found to enhance mortar strength due to the hydration of sulfur containing minerals such as gypsum and the pozzolanic reaction of fine-grain silica. Thus, the feasibility of using it as concrete admixture has been verified.","PeriodicalId":425482,"journal":{"name":"\"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete\"","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":"129686696","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

Performance of Blast Furnace Slag Cement Concrete in Simulated Aggressive Marine Environment 高炉矿渣水泥混凝土在模拟海洋侵蚀环境中的性能研究

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete" Pub Date : 1900-01-01 DOI: 10.14359/6005

A. Taheri, K. Breugel

引用次数: 1

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag &amp; Natural Pozzolans in Concrete"最新文献

"SP-178: Sixth CANMET/ACI/JCI Conference: FLy Ash, Silica Fume, Slag & Natural Pozzolans in Concrete"最新文献