Applications of Maturity Functions to High-Strength Concretes


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Title: Applications of Maturity Functions to High-Strength Concretes

Author(s): Roberto C. A. Pinto and Ken Hover

Publication: Special Publication

Volume: 167


Appears on pages(s): 229-248

Keywords: Cold weather construction; high-strength concretes; hot weather Instruction; silica fume; superplasticizers.

Date: 3/1/1997

This investigation was performed to access the applicability of conventional maturity functions to high strength concretes incorporating silica fume and superplasticizer. Concrete specimens were allowed to cure under three temperatures simulating hot weather, laboratory, and cold weather conditions. Both linear and exponential strength-maturity functions predicted different values of strength for different concrete curing temperatures for the same value of maturity, as has been observed by other researchers. Of these two unctions, the exponential performed somewhat better in this regard for elatively low values of maturity. Concrete strength-gain behavior was influenced by the presence of silica ume and the high amount of super-plasticizer in the mixture. Strength-maturity equations already developed for normal strength concrete underestimated strength at low maturity ages and overestimated strength at high maturity. It is suggested that further studies should be done to evaluate such effects in those relationships.