Accession Number : ADA401312
Title : Off-the-Shelf Antifreeze Admixtures
Descriptive Note : Technical rept.
Corporate Author : ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
Personal Author(s) : Korhonen, CHarles J
Report Date : Apr 2002
Pagination or Media Count : 38
Abstract : Cold weather places serious constraints on today's concreting operations. As temperatures drop, concrete sets more slowly, takes longer to finish, and gains strength less rapidly. If temperatures dip too low, the risk is that the mixing water will freeze, leading to irreparable damage. Current guidance limits cold-weather protection of fresh concrete to insulation, supplemental heating, and temporary shelters to keep the concrete at or above 5 C throughout the curing process. This paper studies the use of commercial admixtures in combination with one another to depress the freezing point of the mixing water and to allow the concrete to gain strength at below-freezing temperatures without thermal protection.
Descriptors : *OFF THE SHELF EQUIPMENT , *CONCRETE , *FREEZING , COMMERCE , RISK , WATER , SHELTERS , MIXTURES , STRENGTH(GENERAL) , GAIN , PROTECTION , MIXING , CURING , HEAT , COLD WEATHER , ANTIFREEZES
Subject Categories : Physical Chemistry
Ceramics, Refractories and Glass
Machinery and Tools
Distribution Statement : APPROVED FOR PUBLIC RELEASE