Influence of Selected Chelating Admixtures upon Concrete Cracking Due to Embedded Metal Corrosion / S-S Yau, WH. Hartt
- Conference Author:
- Corrosion of Reinforcing Steel In Concrete (1978 : Bal Harbour, Fla.)
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- 1 online resource (13 pages) : illustrations, figures, tables
- Additional Creators:
- Hartt, WH., Yau, S-S, American Society for Testing and Materials, and ASTM International
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- It has been considered by the present research that if the solubility limit for embedded metal corrosion products can be increased or the products retained in solution altogether, then development of tensile stresses within the concrete and resultant cracking should be prolonged or eliminated. Consequently, the influence of selected chelating agents, including TEA, EDTA, DPTA, HEDTA, and Chel-138, upon various concrete properties has been evaluated. Specific tests investigated (1) the influence of each agent upon iron solubility as a function of pH, (2) the influence of the various agents as admixtures upon concrete strength, (3) the effect of the chelating agents upon corrosion of steel in aqueous solutions of pH 10 and 12 with 0 and 0.1 percent sodium chloride, and (4) the influence of the agents upon time-to-cracking of reinforced concrete cylinders in an accelerated test. While results of tests in Categories 1 and 3 were encouraging, it was determined that the chelating additions reduced concrete compressive strength. Further, time-to-cracking of admixtured specimens was extended beyond that of standard (no admixture) ones only for HEDTA and Chel-138 and then only under certain test conditions. It is concluded that, while the concept of adding chelating agents to concrete to enhance cracking resistance may be sound, increased time-to-cracking was not generally observed because of reactions between the various admixtures and the concrete.
- Dates of Publication and/or Sequential Designation:
- Volume 1980, Issue 713 (January 1980)
- Other Subject(s):
- Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references 7.
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- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1980. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
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- Mode of access: World Wide Web.
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- ASTM International PDF Purchase price USD25.
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