Tests for Freeze-thaw Durability of Concrete Aggregates PDF Download
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Author:
Publisher:
ISBN:
Category : freeze thaw durability
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : freeze thaw durability
Languages : en
Pages :
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Author: RH. Vogler
Publisher:
ISBN:
Category : Coarse aggregate
Languages : en
Pages : 10
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Book Description
The procedures used to evaluate the durability of coarse aggregate in concrete by freezing and thawing were determined by a survey. Results indicate that a number of state transportation agencies use freeze-thaw procedures in place of, or in addition to, sulfate soundness and other tests. However, each agency's procedure has unique aspects. ASTM Test Method for Resistance of Concrete to Rapid Freezing and Thawing (C 666) describes the procedures for freeze-thaw cycling and gives partial information on expressing test results, but ASTM has no standard procedure to guide the testing agency in important aspects such as: aggregate grading, aggregate moisture treatment and pretreatment, and concrete mixture proportioning (including cement content, air content of concrete, or curing procedure). The ASTM C 666 method of expressing results for change in length does not permit comparison between different aggregates. The information in this paper is intended to assist ASTM Committee C9 on Concrete and Concrete Aggregates in preparing a practice for evaluation of coarse aggregate in concrete by freezing and thawing.
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 94
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Book Description
Paper 1: Results of a statewide experiment to compare the AE-55 air indicator for concrete with conventional pressure methods are presented. Paper 2: Describes a series of tests designed to determine the reliability of results, the feasibility of use, and the practical applications of the test hammer in construction control. Paper 4: In this study, pore characteristics, mineralogy, texture, and structure were determined for cherts and shales from nine Indiana glacial gravel deposits by means of microscopic petrography, x-ray diffraction, and the common specific gravity and absorption techniques.
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Aggregates (Building materials).
Languages : en
Pages : 48
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Book Description
Paper 1 presents laboratory freeze-thaw results as well as field observations on the major Michigan aggregate sources and is considered a first step in formulation of a policy regarding acceptance of future aggregates of unknown service behavior.
Author: J. Marchand
Publisher: CRC Press
ISBN: 0203627091
Category : Architecture
Languages : en
Pages : 323
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Book Description
Concrete durability in climates where freezing and thawing occurs is a continuing problem. It is particularly acute for highway and bridge structures, where de-icing salts are used to combat the effects of frost, snow and ice. These salts can cause damage to concrete and accelerate corrosion of reinforcements. This book presents the latest international research on this area, with contributions from North America and Europe which were presented at an international RILEM workshop.
Author: ACI Committee 522
Publisher:
ISBN: 9780870313646
Category : Lightweight concrete
Languages : en
Pages : 38
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Book Description
"This report provides technical information on pervious concrete's application, design methods, materials, properties, mixture proportioning, construction methods, testing, and inspection. The term 'pervious concrete' typically describes a near-zero-slump, open-graded material consisting of portland cement, coarse aggregate, little or no fine aggregate, admixtures, and water." [p. 1]
Author: Virginia Polytechnic Institute
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 40
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Book Description
Investigation was conducted to develop a simple and fast test that could be used to identify aggregates that cause poor concrete performance when frozen. A one-cycle slow- freeze test was developed and evaluated by correlating results with the durability factor obtained from astm method c290 (the standard freezing and thawing test in water). The test method and testing procedures are presented in detail.
Author: National Cooperative Highway Research Program
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 92
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Book Description
Author: Bryant Mather
Publisher:
ISBN:
Category : Aggregates (Building materials).
Languages : en
Pages : 30
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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.
