Efficiency of fly ash in concrete with age
TL;DR: In this paper, a specific understanding of the efficiency of fly ash in concrete, considering the strength to water cement ratio relations, age and percentage of replacement, was presented, and the overall cementing efficiency of the fly ash was established through a "general efficiency factor" (k e ), dependent on the age and a "percentage efficiency factor", dependent on replacement percentage.
About: This article is published in Cement and Concrete Research.The article was published on 1996-03-01. It has received 103 citations till now. The article focuses on the topics: Fly ash & Water–cement ratio.
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TL;DR: In this article, the authors provide a summary of knowledge and research developments concerning these ash-related issues, including alkali-induced slagging, silicate melt induced slagging (ash fusion), agglomeration, corrosion, and ash utilization.
691 citations
TL;DR: In this article, the degree of hydration of the cement in Portland cement (PC) paste was obtained by determining the non-evaporable water (Wn) content of the fly ash.
540 citations
TL;DR: The use of fly ash in concrete dates back to the late 20th century and its advantages and disadvantages had been widely researched as mentioned in this paper, however, the level of replacement is still limited to a maximum of 35% of cement by mass.
417 citations
TL;DR: In this paper, the effects of replacing cement by fly ash and silica fume on strength, compressive stress-strain relationship, and fracture behavior of concrete were investigated, and it was found that fly ash substantially improved the post-peak compressive behavior, with a relatively smaller gradient in the descending part of the stressstrain curve.
239 citations
TL;DR: In this article, the authors investigated self-compacting concrete (SCC) with levels of up to 80% cement replacement by fly ash in mixes adjusted to give constant fresh concrete properties.
196 citations
Cites result from "Efficiency of fly ash in concrete w..."
...7 shows that the k values are in line with that of NVC [29]....
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References
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01 Dec 1968
TL;DR: In this article, the authors present the following properties of concrete: Elasticity, Shrinkage and Creep, Durabilty of Concrete, Freezing and Thawing, and Chlorides.
Abstract: 1. Portland Cement. 2. Cementitious Materials Of Different Types. 3. Properties Of Aggregate. 4. Fresh Concrete. 5. Admixtures. 6. Strength Of Concrete. 7. Further Aspects Of Hardened Concrete. 8. Temperature Effects In Concrete. 9. Elasticity, Shrinkage And Creep. 10. Durabilty Of Concrete. 11. Effects Of Freezing And Thawing And Of Chlorides. 12. Testing Of Hardened Concrete. 13. Concretes With Particular Properties. 14. Selection Of Concrete Mix Proportions (Mix Design). Appendices. Index.
5,713 citations
TL;DR: In this article, a mixture of normal and highly reactive pozzolans, such as condensed silica-fume, was used to improve early strength and durability of concrete.
234 citations
01 Apr 1967
TL;DR: In this paper, a method is described for use in the design of CONCRETE MIXES to give a required early strength and degree of workability when using FLY-ASH.
Abstract: A METHOD IS DESCRIBED FOR USE IN THE DESIGN OF CONCRETE MIXES TO GIVE A REQUIRED EARLY STRENGTH AND DEGREE OF WORKABILITY WHEN INCORPORATING FLY-ASH. THE USEFULNESS OF THE METHOD IS SHOWN BY COMPARISON WITH A LARGE NUMBER OF TESTS ON FLY-ASH CEMENT CONCRETES AND WITH ANALYSES OF PREVIOUSLY PUBLISHED PAPERS FROM EXTERNAL SOURCES. IT IS SHOWN THAT THERE IS NO NEED TO ACCEPT A LOSS OF EARLY STRENGTH WHEN USING FLY-ASH IN CONCRETE. /RRL/A/
111 citations
01 Jul 1982
TL;DR: In this article, the physical and chemical properties of fly ash are summarized and their effect on freshly mixed and hardened concrete; they evaluate engineering parameters of concrete containing fly ash and also discuss special applications such as pumped concrete.
Abstract: This paper summarizes the physical and chemical properties of fly ash; and their effect on freshly mixed and hardened concrete; evaluates engineering parameters of concrete containing fly ash and also discusses special applications such as pumped concrete.
79 citations