2 edition of Alkali-silica reactivity in five dams in southwestern United States found in the catalog.
Alkali-silica reactivity in five dams in southwestern United States
1985 by Concrete and Structural Branch, Division of Research and Laboratory Services, Engineering and Research Center, U.S. Dept. of the Interior, Bureau of Reclamation, Available from NTIS in Denver, Colo, Springfield, Va .
Written in English
|Statement||by David Stark.|
|Series||REC-ERC ; 85-10, REC-ERC (Series) -- 85-10.|
|Contributions||Engineering and Research Center (U.S.). Concrete and Structural Branch., Construction Technology Laboratories (Portland Cement Association)|
|The Physical Object|
|Pagination||iii, 64 p. :|
|Number of Pages||64|
Alkali Silica Reactivity (ASR) Risk Assessment [Performance Period: 1/1/ - 3/31/] RES #: Purpose of the Project. Alkali-silica reaction (ASR) is a chemical reaction in either concrete or mortar between hydroxyl ions of the alkalis (sodiumand potassium) from hydraulic cement (or . “The Alkali-Silica Reaction in Concrete” by R. N. Swamy, published Design and Control of Concrete Mixtures, 16th edition, , Portland Cement Association “Evaluation of Alkali Silica Reactivity (ASR) Mortar Bar Testing (ASTM C and C) at 14 days and 28 days,” Portland Cement Durability Subcommittee, PCA R&D SNb.
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Alkali-silica reactivity in five dams in southwestern United States. Denver, Colo.: Concrete and Structural Branch, Division of Research and Laboratory Services, Engineering and Research Center, U.S.
Dept. of the Interior, Bureau of Reclamation ; Springfield, Va.: Available from NTIS, . Title: Alkali-Silica Reaction in Five Dams in Southwestern United States Author(s): David Stark and G. De Puy Publication: Alkali-silica reactivity in five dams in southwestern United States book Publication Volume: Issue: Appears on pages(s): Keywords: alkali-aggregate reactions; concrete cores; concrete dams; cracking (fracturing); humidity; moisture; petrography; silica; tests; siliceous aggregates; General.
Alkali-Silica Reactivity in Five Dams in Southwestern United States I July I 7. AUTHOR(S) 1 8. PERFORMING ORGANIZATION David Stark I REPORT NO.
REC-ERC 9. PERFORMING ORGANIZATION NAME AND ADDRESS WORK UNIT NO. The alkali–silica reaction (ASR), more commonly known as "concrete cancer", is a swelling reaction that occurs over time in concrete between the highly alkaline cement paste and the reactive non-crystalline silica found in many common aggregates, given sufficient moisture.
This reaction causes the expansion of the altered aggregate by the formation of a soluble and viscous gel of sodium. Alkali-silica reactivity in five dams in southwestern United States [ - ] Stark, David. Denver, Colo.: Concrete and Structural Branch, Division of Research and Laboratory Services, Engineering and Research Center, U.S.
Dept. of the Interior, Bureau of Reclamation ; Springfield, Va. Alkali-silica reactivity in five dams in southwestern United States / (Denver, Colo.: Concrete and Structural Branch, Division of Research and Laboratory Services, Engineering and Research Center, U.S.
Dept. of the Interior, Bureau of Reclamation Springfield, Va.: Available from National Technical Information Service, ), by D.
Stark and. The Reference Center was developed to provide users with access to pertinent information related to alkali-silica reactivity (ASR). The Reference Center has been organized for quick and easy access to various resources, and will be updated regularly to ensure that the most up-to.
Stark, D. & Depuy, G. () Alkali-Silica Reaction in five dams in southwestern United States. In: Proceedings of the Katherine and Bryant Mather International Conference on Concrete Durability. Federal Highway Administration Video VH Alkali-Silica Testing, Alkali-Silica Reactivity Alkali-silica reactivity, a major cause of deterioration in concrete, is explained in the introduction.
Handbook For Identification of Alkali-Silica Reactivity In Airfield Pavements .pdf) Advisory Circular No. /, Federal Aviation Administration, U.S. Department of Transportation, February State-of-the-Art Report on Alkali-Aggregate Reactivity .pdf) American Concrete Institute, December concrete has been noted since the early s, primarily in the southwestern United States but also in Kansas, Nebraska, Al abama, and Georgia.
Studies of these failed concretes showed that the expansion was bec ause of a reaction between the alkali in the cement and the siliceous aggregates used in the concrete. Since then, many studiesFile Size: 37KB. The objective of this paper was to evaluate the alkali-silica reactivity (ASR) and alkali-carbonate reactivity (ACR) of the 14 aggregate groups quarried from different locations.
knowledge of all Alkali-silica reactivity in five dams in southwestern United States book of alkali-silica reactivity have been identified in Part II, Gaps in our Knowledge of Alkali-Silica Reactions in Concrete.
Sections 1, 6, 7, 8 and 9 of Alkali-silica reactivity in five dams in southwestern United States book II were prepared by Richard Helmuth, sections 2 and 3 by David Stark, sections 4 and 5 by Sidney Diamond, and sections 9 and 10 by Micheline Moranville-Regourd.
Handbook for the identification of alkali-silica reactivity Alkali-silica reactivity in five dams in southwestern United States book highway structures (Strategic Highway Research Program) [Stark, David] on *FREE* shipping on qualifying offers.
Handbook for the identification of alkali-silica reactivity in highway structures (Strategic Highway Research Program)Author: David Stark. The potential alkali-silica reactivity (ASR) of Lithuanian aggregates from five quarries was investigated using national chemical method, accelerated mortar bar test method RILEM AAR-2 (specimens 40×40× mm) and storage of specimens at 60 °C and % RH by: 1.
Alkali Silica reaction under the influence of chloride based deicers Purvi Desai Clemson University, Highways form the backbone of transportation in United States.
As a result, issues evaluation to assess effects of chloride deicers on alkali silica reactivity. Variations inCited by: 5. Alkali-Silica Reactivity Occurrences of ASR in the United States (From FHWA Showcase Workshop on ASR) ASR Occurrence Identified Uncertain SAFETEA-LU Legislation Sec.
(e) Demonstration Projects and Studies (3) Alkali Silica Reactivity. Of the funds made available by (a)(1) of this Act, $2, shall be made available by the. Alkali Silica Reaction - Proactive Avoidance.
Use a low alkali cement. handbook for the identification of alkali-silica reactivity in highway structures This handbook is designed to help highway engineers and bridge inspectors spot and fix this very damaging and difficult-to-detect problem, namely, alkali-silica reactivity (ASR).
The alkali-silica reaction though not true is described as a concrete cancer. A human cancer, if untreated is terminal, whereas the alkali-silica reaction and the expansion it induces, if untreated, eventually stops.
No concreted structure or part of a concrete structure any where in the world has collapsed due to alkali-silica reaction alone. Alkali Silica Reaction (ASR) Potential of Sand and Gravels from NW-Himalayan Rivers and their Performance as Concrete Aggregate at Three Dams in Pakistan Chemistry of alkali-silica reaction and testing of aggregates, Cement and Concrete Composites 27(): Alkali Silica Reactivity in Concrete Rick Williams, P.G.
What Is ASR In Concrete. Alkali Silica Reactivity First discovered in California in the ’s Expansive gels form as alkaline fluids derived from the cement attack certain reactive siliceous aggregates. One of the leading causes of premature concrete failure. Alkali-aggregate reactions can be either alkali-carbonate reactions (ACRs) or alkali-silica reactions (ASRs).
In ACR, the reaction is between the alkalies (sodium and potassium) and certain carbonate rocks, particularly calcitic dolomite and dolomitic limestones, present in some aggregates. In ASR, the reaction is between alkalies and certain siliceous rocks or minerals, such as opaline chert.
Alkali-Silica Reactivity in the State of Montana Western Transportation Institute 4 potential of using these maps to identify other reactive aggregate sources. Further, this information may be used to develop a map of potential reactive aggregates in the state. The first phase of research will begin with a literature review on the topic (Task 1).
Alkali-Silica Reactivity Alternate Mitigation Materials for Alkali-Silica Reaction in Concrete Research ReportAuthors: Zachoriah Ballard, William Caires, Stanley Peters, Keywords: Alkali-Silica Reactivity, Concrete Pavement, Fly Ash.
Progress in the Evaluation of Alkali-Aggregate Reaction in Concrete Construction in the Pacific Northwest, United States and Canada By Fred H. Shrimer1 _____ 1Golder Associates, Vancouver, British Columbia, Canada.
Introduction. This chapter is the third of a series dealing with chemical reactions of aggregates in concrete. The first version, enti-tled “Chemical Reactions,” was written by W. Hansen and included in ASTM STP A, published in It dealt with several types of chemical reactions known at the time to occur in concrete, including alkali-silica by: Summary.
Alkali-Aggregate Reaction in Concrete: A World Review is unique in providing authoritative and up to date expert information on the causes and effects of Alkali-Aggregate Reaction (AAR) in concrete structures a first edition entitled The Alkali-Silica Reaction in Concrete, edited by Professor Narayan Swamy, was published in a first attempt to cover this concrete.
Buy Alkali/Silica Reaction in Concrete by D.W. Hobbs (ISBN: ) from Amazon's Book Store. Everyday low prices and free delivery on eligible orders. ALKALI SILICA REACTIVITY ALKALI SILICA REACTIVITY JBASE (Structural) (OP) 14 Oct 14 We have an elevated tennis court, 6 years old, constructed of 2" metal deck with 4" total thickness of concrete.
There is severe ASR finish damage. We want to resurface the concrete by removing +/-1 inch of concrete and replacing with a fully bonded. The Alkali-Silica Reaction in Concrete by R N Swamy (Editor) ISBN Format: Hardcover.
Chapter 1: Understanding Alkali-Silica Reactivity Definition Alkali-silica reactivity (ASR) occurs either in mortar or concrete. A deleterious chemical reaction between hydroxyl (OH–) ions associated with alkalis (sodium and potassium) present in cement or other sources and certain reactive siliceous components that may be.
Alkali silica reactivity 1. ALKALI-SILICA REACTIVITY (ASR) 2. What is ASR. is a reaction between alkali hydroxide and Silica particles from aggregate that happened in concrete 3.
Why is it dangerous. Because: • 1. Alkalies + Reactive Silica → Gel Reaction Product • 2. Gel Reaction Product + Moisture → Expansion 4. Alkali Silica Reactions By Karthik Obla, Ph.D., P.E. Director of Research and Materials Engineering, NRMCA Reactivity Level Aggregate Expansion, C1-year % Equal to or greater than Less than Very Highly Reactive (VHR) - Highly Reactive (HR) Moderately Reactive (MR) Significant research and efforts have gone toward File Size: KB.
This report gathers the state-of-the-art in alkali silica reaction (ASR) in concrete, an. d more detailed study to be submitted to Congress in response to Public Law (HR ). Mitigation techniques from various states in the nal organizations, were assessed and summarized. Introduction. The alkali–silica reaction first recognized by Stanton () is the reaction between silica components in rocks and alkalies in concrete.
When concrete is affected by the alkali–silica reaction, map-like cracks occur in the concrete, and its durability becomes by: Use of fly ash by percent replacement of cement is considered as one of the most economical and effective methods for mitigating alkali-silica reaction (ASR) related distress in the concrete.
However, fly ash has been proven to be somewhat variable in its effectiveness in inhibiting alkali-silica reactivity, principally because its composition depends on the coal properties from which it is Cited by: 1. MITIGATION OF ALKALI-SILICA REACTIVITY IN NEW MEXICO. Alkali-silica reaction (ASR) occurs when reactive silica in aggregates chemically reacts with alkaline components of Portland cement forming ASR gel.
So long as the internal relative humidity of concrete exceeds 80%, the gel absorbs water and swells, damaging the concrete. Scope. This test method covers chemical determination of the potential reactivity of an aggregate with alkalies in portland-cement concrete as indicated by the amount of reaction during 24 h at 80 ° C between 1 N sodium hydroxide solution and aggregate that has been crushed and sieved to pass a m sieve and be retained on a m sieve.
The values stated in SI units are to be. ALTERNATE MITIGATION MATERIALS FOR ALKALI-SILICA REACTION (ASR) IN CONCRETE by Zachoriah J. Ballard, E.I. William S.
Caires, CET Stanley R. Peters, P.E. Report No. Prepared by J.A. Cesare and Associates, Inc./CTS S. Alton Way Building B Centennial, CO Sponsored by the Colorado Department of Transportation In Cooperation with the.
This report summarizes the findings of an experimental evaluation into alkali silica reaction (ASR) in cement free alkali-activated slag and fly ash binder concrete.Main Content Research Alkali-Silica Reactivity in the State of Montana.
Concrete can be susceptible to expansive reactions between alkalis in the Portland cement and the silicas in the aggregates, which can ultimately reduce the lifespan of the concrete resulting in costly repairs or even replacement.Ebook requires mitigation based upon the alkali silica reactivity (ASR) ASTM C expansion test results for each individual coarse aggregate source.
Review MnDOT Specifications to determine mitigation requirements. Contact the MnDOT Concrete Unit if the proposed coarse aggregate source is not listed on the table below.