𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The influence of fly ash fineness on the strength of concrete

✍ Scribed by Š. Slanička

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
520 KB
Volume
21
Category
Article
ISSN
0008-8846

No coin nor oath required. For personal study only.

✦ Synopsis

With otherwise similar chemical end mineralogical composition of fly ash, is it its fineness which has the most significant influence on the properties of concrete. Coarser fly ash is, as a rule, suitable only as a substitute of s portion of fine aggregates or as s correction of unsuitable shape and grading of aggregates. Economy of cement can be reached only with sufficiently fine fly ash. Utilization of fly ash in the production of concrete can be considerably increased when its finest size fractions are withdrawn separately from the end stages of retainers. To evaluate the influence of various doses of differently fine fly ash upon the strength of concrete, the modifications of Abrams end Bolomey formulas were proposed. These were checked and compared with the complex of experimentally proved strengths of COnCretes.

📜 SIMILAR VOLUMES

Influence of fly ash characteristics on
Influence of fly ash characteristics on the strength of portland-fly ash mixtures
✍ P.K. Mehta 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 904 KB

Modern thermal power plants are producing large amounts of fly ash that is generally quite suitable for use as a supplementary cementitious material in concrete. However, for tilis purpose the fly ash utilization in the United States continues to remain low, mainly on account of lack of quality cont

Early strength behaviour of fly ash conc
Early strength behaviour of fly ash concretes
✍ K. Ganesh Babu; G. Siva Nageswara Rao 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 446 KB

The strength of concrete at early ages has assumed a co~iderable significance in recent years due to the several specific requirements ot the modern construction industry, like the early striking or forms, early transfer of prestress etc. However, fly ash concretes are known to-have a lower early ag

Long-term strength of high fly ash concr
Long-term strength of high fly ash concretes
✍ Torben C. Hansen 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 172 KB

Five fly ash concretes were found to gain considerable strength beyond 28 days when standard cured in water at 20°C. However, strength development came to an almost complete stop after 3½ years, at what time the fly ash activity factors with respect to concrete compressive strength ranged from 0.86

Effectiveness of fly ash for strength an
Effectiveness of fly ash for strength and durability of concrete
✍ D.W.S. Ho; R.K. Lewis 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 413 KB

The effectiveness, K, of a fly ash can be defined as the ratio of the amount of cement replaced to the amount of fly ash added, provided the specified requirements of the concrete are maintained. It is generally assumed that the effectiveness of a fly ash can be treated as a constant. This paper pre

Mix design for optimal strength developm
Mix design for optimal strength development of fly ash concrete
✍ M.K. Gopalan; M.N. Haque 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 413 KB

MLx design of fly ash concrete was attempted by three methods to find the influence of design method on the strength development. The conventional addition replacement method was compared with two other techniques by monitoring the compressive strength at 7, 28 and 91 days. The results suggest that