EFNARC was an acronym for European Federation of National Associations Representing producers and applicators of specialist building products for Concrete,? which was founded by the European concrete industry in 1989.
Variability of Compressive Strength of Shotcrete in a Tunnel-Lining Project
Recently, questions have been asked by the International Tunnelling and Underground Space Association (ITA) about what variability can be expected for compressive strength for shotcrete (sprayed concrete) in ground support projects.
Shotcreting on Frozen Ground
The Northern Boulevard Crossing (NBX) is the keystone portion of the massive multi-billion-dollar East Side Access (ESA) Programme by the Metropolitan Transit Authority Capital Construction (MTACC) to bring Long Island trains into and out of New York City’s Grand Central Terminal.
Fallouts Can Be Deadly!
Many years ago, when the use of shotcrete in an underground support system was not as popular as it is today, I witnessed a mine foreman walk into an underground opening to admire the job his shotcrete crew had done placing shotcrete only an hour or two earlier.
The Use of Shotcrete for Construction of Backfill Barricades in Mining Environments
As we all know, the mining process is essentially the excavation and extraction of rock, ore, gems, or other minerals from the earth?s surface.
Briardale Gardens
With a population of over 8.17 million people, the city of London, England, continues to grow.
Hagerbach Underground Test Gallery
A world-class facility, the Hagerbach underground test gallery is located in Flums, Switzerland.
Job Report on Hydropower Station in Stanzertal, Austria
It is remarkable that three different tunnelbuilding methods are being used on this hydropower station construction site: excavator, drill and blast, and tunnel boring machine (TBM) advancement.