[PDF] The Effect Of The Mixing And Curing Temperatures Upon The Strength Of Portland Cement Concrete eBook

Author : Hamdi Celik Ozyildirim
Publisher :
Page : 32 pages
File Size : 16,18 MB
Release : 1998
Category : Concrete
ISBN :

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This study evaluated the effects of temperature on the strength and permeability of concretes containing pozzolans (fly ash and silica fume) and slag. Two test programs were conducted. In the first, one control and five experimental mixtures containing silica fume, fly ash, or slag were evaluated. In the second, one control and three experimental mixtures containing fly ash or slag at a higher water-cementitious material ratio (W/CM) than used in the first program were evaluated. Concretes cured at higher temperatures had higher strengths up to 28 days but lower strengths at 1 year. Permeability decreased with time. Increasing early curing temperatures enabled the achievement of lower long-term permeability for 6 months and beyond at 28 days. Concretes containing a pozzolan or slag had a lower long-term permeability than the control. Adding a pozzolan was more effective in reducing permeability than reducing the W/CM. At cold temperatures, if the specified properties are not achieved, the contractor should change the mix design and/or provide insulating blankets and/or external heat to ensure the desired product.

Author : Duff An. Abrams
Publisher : Forgotten Books
Page : 40 pages
File Size : 19,60 MB
Release : 2016-11-07
Category : Technology & Engineering
ISBN : 9781334197697

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Excerpt from Effect of Curing Condition on the Wear and Strength of Concrete The necessity for careful restriction on the quantity of mixing water used in concrete, and the importance of proper curing conditions during the period of setting and hardening are not generally appreciated by engineers and contractors doing concrete work. In view of the wide spread use oi concrete in the construction of pavements, oors, loading platforms, and in other places requiring high strength and resistance to abrasion, it seemed desirable to carry out an experimental study which would bring out the effect Of water content and curing conditions on the compressive strength and the wearing resistance of concrete, and the relation between these two properties. These tests were made as a part of the experimental studies of the properties of concrete and concrete materials, being carried out through the co - operation of Lewis Institute and the Portland Cement Association at the Structural Materials Research Laboratory, Lewis Institute, Chicago. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works."

Author : State Highway Commission of Kansas
Publisher :
Page : 6 pages
File Size : 21,50 MB
Release : 1954
Category :
ISBN :

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Discusses testing of concrete bridge girders.