SLAG-CEMENT CONCRETES THAT CONTAIN COMPLEX ANTIFREEZE ADDITIVES AND REQUIRE NO HEATING
Investigations were made of slag-portland-cement concretes that harden in subzero temperatures of from -5 to -25 deg. C and require no heating. M 300 slag portland cement, 2 groups of slag binders - grades 300 and 400 respectively, 5-20 mm crushed granite and fine-grained sand were investigated. Calcium nitrate, calcium-nitrite-nitrate, and calcium- nitrate-chloride served as antifreeze additives that accelerated the hardening process. The test results indicate that slag-portland-cement concretes without additives acquire virtually no strength when frozen when subsequently cured for 60 days under normal conditions, the strength of concretes frozen at -5 deg C is approximately 80% of the design strength. Failure of the concrete surface was noted in a number of cases. For slag- portland-cement concretes with antifreeze additives and slag-binder concretes containing chemical activators, a post-freeze strength ranging from 20-50% and 10-35% respectively of the design strength is acquired. The post-thaw hardening rate does not exhibit a well-defined dependence on the freezing point nor on the type of antifreeze additives used. It was noted that an increase in additive concentration contributes to a gain in concrete strength both on curing while frozen, and in the process of continued curing under normal conditions. Comments are also made on the optimum percentage of additives, frost-resistance tests, strength properties, the utility of the slag binders, sulfate resistance, and the corrosive action of antifreeze additives.
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Supplemental Notes:
- Translated from Gidrotekhnicheskoe Stroitelstvo, No. 8, August 1975, pp 18-22.
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Corporate Authors:
American Society of Civil Engineers
345 East 47th Street
New York, NY United States 10017-2398 -
Authors:
- Pukhalskii, G V
- Zhikhovich, E V
- Nosenko, T F
- Publication Date: 1975-8
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 736-740
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Serial:
- Hydrotechnical Construction
- Issue Number: 8
- Publisher: American Society of Civil Engineers
Subject/Index Terms
- TRT Terms: Antifreeze; Binders; Cement additives; Granite; Portland cement; Sand; Slag cement
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00145057
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 13 1977 12:00AM