Author: Amir Koubaa
Publisher:
ISBN:
Category :
Languages : en
Pages : 404

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Book Description

Author: Donald J. Janssen
Publisher: Strategic Highway Research Program (Shrp)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 228

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Book Description
This study, aimed at improving the freeze-thaw resistance of concrete, consists of three parts. Part I evaluates parameters affecting the freeze-thaw durability of concrete. A modification of the existing standard of method for determining the durability factor of concrete specimens is proposed, and a new procedure for fundamental transverse frequency (used in durability factor calculations) has been developed. Part II focuses on developing better methods for identifying nondurable aggregates, and has resulted in a rapid new test based on the hydraulic fracture of aggregates. Part III describes field experiments to evaluate the freeze-thaw resistance of a number of specified concrete mixes and the use of sealants to mitigate D-cracking. Preliminary field performance results are presented.

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 816

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Author: R Auberg
Publisher: CRC Press
ISBN: 0203627326
Category : Architecture
Languages : en
Pages : 400

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Book Description
This book forms the proceedings of the international workshop to be held in Essen, Germany. This workshop summarises the conclusion of the technical committee's investigations into the resistance of concrete to freeze-thaw attack, specific in this to resistance with or without de-icing chemicals. It presents the RILEM recommendations on testing the freeze-thaw and de-icing salt resistance of concrete.

Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 656

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Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 428

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Book Description

Author: Donald J. Janssen
Publisher: RILEM Publications
ISBN: 9782912143310
Category : Concrete
Languages : en
Pages : 318

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Book Description

Author: Enric Vázquez
Publisher: RILEM Publications
ISBN: 9782912143525
Category : Building materials
Languages : en
Pages : 604

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Author:
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 84

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Author:
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 112

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Book Description
Approximately 10 to 11 million tons of aggregates are utilized in transportation infrastructure projects in Wisconsin annually. The quality of aggregates has a tremendous influence on the performance and durability of roadways and bridges. In this Phase II research study, detailed statistical analyses were performed on over 1,000 sets of historical aggregate test results and the experimental results from the Phase I study. Test results from other states were analyzed as well. Aggregate tests were performed on 12 known marginal or poor Wisconsin aggregates to specifically address test performance of such aggregates. Selected aggregates were scanned using X-ray computed tomography to assess the effects of freeze-thaw and sodium sulfate exposure on the internal void system. The results of multi-parameter logistic regression analyses show that the pass/fail outcomes of the Micro-Deval test can be predicted when LA abrasion, absorption, and sodium sulfate soundness test results are known. The unconfined freeze-thaw test outcomes cannot be predicted from results of other tests (not correlated). Therefore, the unconfined freeze-thaw test should be part of any test protocol as it measures an aggregate characteristic that cannot be obtained from other tests. The percentiles associated with any proposed acceptance threshold limits for various aggregate tests should be determined using the statistical data provided.