Title: Rapid Strength Concrete for Rehabilitation of Transportation Infrastructure
Author(s): B. Stein, R. Ryan, Y. Bu, and K. Vallens
Publication: Symposium Paper
Appears on pages(s): 93-106
Keywords: Concrete; accelerated strength development; calcium sulfoaluminate cement; portland cement
One of the important objectives of enhancing the sustainability of concrete construction consists of reducing the unwanted rebuilding of the same and extending the service life of buildings, structures and pavements. Proper maintenance, preservation and rehabilitation practices extend service life and improve structural and functional performance of transportation infrastructure. Minimization of impact on traffic is an important requirement for selecting materials and methods of maintenance and repair. Use of rapid strength concrete (RSC) that develops compressive strength of 2500 - 3500 psi (17.2 – 24.1 MPa) in 1.5 – 5 hours is one solution for reducing the duration of closures of highways and structures during repairs. The paper discusses: (i) Principles of proportioning of RSC; (ii) Performance of RSC; (iii) State-of-art practices; and (iv) Performance specifications for RSC.