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Title: Investigation of expanding grout and concrete. Report 1, Summary of field mixture test results, July 1969 through June 1970
Authors: U.S. Atomic Energy Commission.
Sandia National Laboratories
United States. Defense Atomic Support Agency.
Hoff, G. C. (George C.)
Keywords: Concretes
Expansive cements
Portland cements
Publisher: Concrete Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Miscellaneous paper (U.S. Army Engineer Waterways Experiment Station) ; C-71-5 rept.1.
Description: Miscellaneous paper
Abstract: Laboratory evaluations were made of 14 grout mixtures and 7 concrete mixtures all of which contained type K expansive cement wholly or in part. The mixtures were developed for field use on a number of different projects. They varied widely in ingredients, proportions, curing, and the type of evaluations made. Very few direct comparisons of behavior among mixtures could be made. Three special control study mixture were also evaluated as a pilot study. Both shrinkage-compensating and self-stressing type K expansive cements were used. The self-stressing cement was used as a portion of the total cement, while the shrinkage-compensating cement was used as the only cement in the mixture. Each mixture was evaluated for some, but not all, of the following: expansion, strength, modulus of elasticity, compressional wave velocity, constrained pressure, temperature rise, slump loss, and efflux time. Comparisons were made as appropriate. Temperature rise values as high as 178 F were recorded. The various mixtures developed 3-day compressive strengths ranging from less than 1300 psi to more than 4700 psi. Maximum compressive strength noted was 7155 psi on one mixture at 28 days age; other 28-day strengths on other mixtures were as low as 2115 psi. Static modulus of elasticity values were between 1.0 and 3,5 million psi with corresponding dynamic moduli being 20 to 30 percent greater. Greatest unrestrained expansion observed was 0.158 percent; this included both thermal and chemical expansions. Most expansions were considerably less, however. Restrained expansions were always less than unrestrained expansions. Compressional wave velocities from 10,800 to 14,395 fps were observed. A constrained stress of 52 psi was measured for one grout mixture. Slump loss evaluations indicated that the amount of loss was a function of the mixture ingredients and proportions as well as the mixing cycle.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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