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|Title:||Latex modification of fast-fix C-1 cement for the rapid repair of bomb-damaged runways|
|Authors:||United States. Air Force. Wright-Patterson Air Force Base.|
Eash, R. D.
Hart, G. M.
|Publisher:||Concrete Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Contract report (U.S. Army Engineer Waterways Experiment Station) ; C-71-1.|
Abstract: This report consists, essentially, of two parts: a state-of-the-art review and laboratory testing of the effects of adding two Dow polymeric latexes to "Fast-Fix C-1". The state-of-the-art review covers several basic studies in which many materials both organic and inorganic, were investigated. The study was then focused on the study of fast-setting inorganic cements and methods to obtain fast setting. Miscellaneous cement technology, such as methods to obtain high strength concrete, silicate concrete, and cementitious ceramic materials, are also covered. The state-of-the-art review also has a section indicating areas in which fast-setting cements can serve and the requirements placed on this service. Topics covered are runway design, pavement requirements, pavement evaluation, surface repair, and cold weather construction. In the lab study, two polymeric latexes, Dow Latex 46Q and Dow Latex 464, were incorporated at selected concentrations in Fast-Fix C-1 mortars. Tests were conducted to determine freeze-thaw durability, tensile strength, compressive strength, flexural strength, and shear bond. All latex concentrations improved bond strength and freeze-thaw durability and decrease 24-hour water absorption. All concentrations tended to retard set and early strength gain. Low concentrations (4%) of Latex 464 produced a modest improvement in compressive and flexural strengths, but no change in the elastic modulus. Due to the added expense and more complicated mixing procedure, the use of latexes to modify Fast-Fix C-1 cement for the rapid repair of bomb-damaged runways is not recommended.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Report|