Modern advances and applications of sprayed concrete

摘要

The purpose of this paper is to give an overview of modern sprayed concrete systems, but also to highlight that sprayed concrete should be regarded as concrete. To achieve this, the paper describes the rapid evolution of sprayed concrete and the international trends that have developed in the last ten years. Recent developments in application systems are explored, particularly pertaining to the use of modem, high performance admixtures and accelerators to ensure high quality, environmentally safe sprayed concrete, produced in line with recognised conventional concrete practices. Coupled with the mix design technology, new, more automated sprayed concrete equipment are reviewed that enable high production rates whilst reducing the risk of reduced sprayed concrete quality from human fatigue and errors. Finally, the paper discusses new developments in sprayed concrete and additional applications outside the underground construction industry that demonstrate sprayed concrete is a versatile permanent civil engineering material.