Repair Portal

RepairUndergroundStructuralGeneralSummary of ‘Guideline on the Applicability of Fiber-Reinforced Shotcrete for Ground Support in Mines’

By Rym Msatef and Marc Jolin

This guide examines and provides a description of the common testing methods used for FRS and how to interpret the information generated for ground support in mines.

RepairArchitecturalStructuralGeneralGuide to ACI Shotcrete Documents

Lars Balck

RepairStructuralA Study on Low-Velocity Sprayed Mortars

Christine Poulin and Marc Jolin

RepairWhy Membership Benefits Refractory Contractors

Ted Sofis

In March 2024, at the ASA committee meetings in Austin, TX, the question came up about refractory contractors, and why that industry segment is so under-represented in the association. Considering my background, I felt qualified to address the issue. Much of my work involved shotcrete

RepairUndergroundStructuralThe Rondout Bypass Tunnel Shafts – Shotcrete Lining

Paul Madsen, Bade Sozer, Thomas Hennings, & Eileen Test

The Rondout-West Branch Tunnel (RWBT), a segment of the Delaware Aqueduct (the Aqueduct), was built from 1937 to 1944 and provides about 50% of New York City’s total water supply. The tunnel is concrete lined and has a finished inside diameter of 13.5 ft (4.1

RepairStructuralO’Hare Plaza West Drive and Executive Garage Restoration

Joshua Freedland

While infrastructure projects such as parking garages are often the last projects to be funded due to their utilitarian nature, they are important to the health of commercial properties since they are often the first impression for tenants and visitors. At O’Hare Plaza, the parking

RepairStructuralThe Neville Island Bridge Project

Ted Sofis

The Neville Island Bridge Rehabilitation project originally came out for bid in 2018. The bridge is located in Allegheny County, PA and within PennDOT’s District 11. In the bid package, it was noted that construction could not begin until a nesting pair of Peregrine Falcons

RepairStructuralMoyie Dam Repair: Back to the Future

Mike Newcomb and Leo Waddell

Moyie Dam at Bonner’s Ferry in northern Idaho started initial construction just before WWII. They shut down construction during the war. After the war was over, the dam went into service in the late 1950s.

RepairUndergroundStructuralTAKING TUSCARORA INTO ANOTHER CENTURY

Kristina Smith

The Tuscarora Mountain Tunnels in Pennsylvania have a fascinating history. The older of the two tunnels, built between 1938 and 1940, was designed to carry a railroad that never came into service. Industrialists of the day, William Henry Vanderbilt and Andrew Carnegie, were backers of

RepairStructuralSHOTCRETE VS FIRE AND WATER REPLACEMENT OF FLUME 4/5/6 AND 30

Jason Myers

On August 14, 2021, the Caldor Fire started in Northern California near Pollock Pines, CA. The fire ended up consuming almost 222,000 acres (90,000 hectares) and seriously threatened South Lake Tahoe. Besides the over 1000 structures that were lost, the fire also burned along a