Study of Frost Resistance of Concrete Using an Organic Shrinkage-Reducing Agent


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Title: Study of Frost Resistance of Concrete Using an Organic Shrinkage-Reducing Agent

Author(s): H. Fujiwara, R. Tomita, and Y. Shimoyamata

Publication: Special Publication

Volume: 145


Appears on pages(s): 643-656

Keywords: aggregates; air entrainment; compressive strength; concretes; deterioration; drying shrinkage; durability; freeze-thaw durability; organic compounds; saturation; shrinkage-reducing agents; viscosity; Materials Research

Date: 5/1/1994

An organic shrinkage-reducing agent consists mainly of lower alcohol alkaline oxide adducts. This is a very effective agent for reducing drying shrinkage of concrete, but some research has reported suspicion that concrete using this agent has poor frost resistance. The purpose of this study was to investigate the frost resistance of concrete. Research focused on the viscosity of capillary water, a solution containing the agent, and it was found that the viscosity was somewhat higher than normal capillary water; therefore, the pressure of the solution during freezing would be very high, which causes accelerated concrete deterioration. However, this agent is intended for use for concrete exposed to frequent drying conditions. Freeze-thaw testing was carried out on concretes with the agent with saturations under 100 percent. The continuous monitoring of concrete exposed to cold environment conditions outdoors for 8 years has not shown any problems.