Standard Test Method for Water Retention by Liquid Membrane-Forming Curing Compounds for Concrete PDF Download
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Category :
Languages : en
Pages : 0
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Author:
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Category :
Languages : en
Pages : 0
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Author: American Society for Testing and Materials
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 4
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Author: British Standards Institute Staff
Publisher:
ISBN: 9780580540516
Category :
Languages : en
Pages : 12
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Curing (concrete), Concretes, Cement and concrete technology, Water-absorption tests, Water absorption, Moisture measurement
Author: American Concrete Institute
Publisher: American Concrete Institute
ISBN: 0870311948
Category : Concrete
Languages : en
Pages : 660
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Author: Peizhi Sun
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Excessive early-age concrete surface moisture evaporation causes many problems of concrete pavements, such as plastic shrinkage cracking and delamination; the use of liquid membrane-forming curing compounds is one of the most prevalent methods to mitigate the issues. However, the present standard test, ASTM C 156-98, "Standard Test Method of Water Retention by Concrete Curing Materials" has some inherent limitations in assessing the curing effectiveness of concrete. To better apply curing practices and qualify the curing compound, a new evaluation protocol is introduced in this study. The new protocol consists of using measured relative humidity and temperature to calculate an effectiveness index (EI) which serves as an indicator of the effectiveness of curing. Moistures loss and surface abrasion resistance measurements were made on concrete specimen, and were found to have significant correlation with EI, where higher EI were associated with lower moisture loss and higher surface abrasion resistance. EI was also found to be sensitive to ambient wind condition, types of curing compound and the application rate of the curing compound. Dielectric constant (DC) measurements were also made on concrete specimens indicating the free moisture content on the surface concrete. The DC measurements were also found to differentiate the quality of curing under different ambient conditions, with various types of the curing compounds and the w/c of the concrete mixture. The utility of using the new protocol to assess concrete curing compound effectiveness was also evaluated under the field condition. Both EI and DC measurements showed potentials to distinguish the curing quality for concrete pavement construction. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151295
Author:
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Category : Weights and measures
Languages : en
Pages : 1064
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Author: SABS Standards Division
Publisher:
ISBN: 9780626412104
Category :
Languages : en
Pages : 0
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Author: Joseph F. Lamond
Publisher: ASTM International
ISBN: 0803133677
Category : Technology & Engineering
Languages : en
Pages : 661
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Author: Matthew D. Loeffler
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 106
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Author: Wisconsin. Department of Transportation
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 664
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