State-of-the-Art Specifications for Shotcrete Rehabilitation Projects

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The Ministry of Transportation of Quebec’s (MTQ’s) shotcrete specification document has evolved over the 40 years since it was first introduced and has changed dramatically over the past 10 years. Today, this specification for shotcrete rehabilitation remains a source document (mostly when durability is the leading parameter) for a large number of major authorities/owners and engineering firms in the Province of Quebec, Canada. MTQ’s Engineering Structural Department, together with other industrial partners, government authorities cement producers, shotcrete manufacturers, admixtures producers, and contractors have been involved in Laval University’s Industrial Chair on Shotcrete and Concrete Repairs since 1995. During these years, this Industrial Chair has worked on various applied research projects covering a wide variety of dry-and wet-mix shotcrete topics such as durability of shotcrete, 4-6 fundamentals of shotcrete, shotcrete rheology (rebound buildup, aggregate gradation, and reinforcing bar encapsulation), surface preparation, mixture designs, finishing, and investigation of various powder and liquid admixtures.

As a result of the MTQ staff’s active participation and involvement, they have been able to put their research findings to practice. Combined with their experience in the field, they have been adapting and updating their concrete rehabilitation specification documents almost yearly. In addition, they follow the latest cutting-edge technology in an effort to improve the quality of repairs and practices in the field.

This article provides a summary of MTQ’s shotcrete performance specification and focuses on the use of shotcrete for rehabilitation of deteriorated concrete structures. It call also be of value for any other type of shotcrete in civil applications, such as slope stabilization and new construction.

To read the full article, click on the PDF buttons.

King Packaged Materials company is a proud member of the American Shotcrete Association (ASA)!

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King Packaged Materials Company is a proud member of the Tunnelling Association of Canada (TAC)!

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KING's Engineering Services Team offers a variety of specification documents. E-Mail engineeringservices@kpmindustries.com to request these resources.

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