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https://hdl.handle.net/11681/11507| Title: | Rapid repair of bomb-damaged runways. Phase I, Preliminary laboratory investigation |
| Authors: | United States. Air Force. Systems Command. Aeronautical Systems Division. Bussone, P. S. Bottomley, B. J. Hoff, G. C. (George C.) |
| Keywords: | Cements Rapid construction Runway repairs |
| 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-72-15. |
| Description: | Miscellaneous paper Abstract: Three cements have been studied for possible use in the rapid repair of bomb-damaged runways. These A.re: (a) lumnite (L)' a high-alumina cement which was blended with portland cements type I, II, and III, regulated--set; cement, and other concrete admixtures; (b) regulated-set cement (R)' a halogenated calcium aluminate cement which was blended with gypsum additives in varying amounts from 0 to 12.5 percent and also mixed with an accelerator, sodium metasilicate (SMS); end ( c) ordinary portland cement with various accelerators, Sigunit ( s)' sodium metasilicate (SMS), and sodium carbonate. Compressive strengths of 2-in. cubes were determined at ages varying from 45 min to 28 days to establish strength development information. With some cements, neat slurry grout-type mixtures were made and tested in the srune manner as the mortar mixtures. Water-cement ratios varied from 0.50 to 0.70 for the mortar mixtures and flow, when measured, was determined by the flow table method. With the neat slurry mixtures w/c ratios varied from 0.30 to 0.80, the efflux time being measured by the flow-cone method. The results indicate the following: (a) that many of the accelerators and so-called fast-setting cements do not develop 1-hour strengths sufficient for use in rapid repair of bomb-damaged runways; (b) two materials studied have yielded 1-hour compressive strengths in excess of 1000 psi. One is a cement, regulated-set, a proprietary product of the Portland Cement Association, and the second is an accelerator, known as sodium metasilicate, which has shown promise in both mixtures of ordinary portland and regulated-set cements. A recommended follow-on plan has been included in Appendix A. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/11507 |
| Appears in Collections: | Miscellaneous Paper |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| MP-C-72-15.pdf | 1.06 MB | Adobe PDF |  View/Open |