Category: Urban Infrastructure

Acoustic Leak Detection Survey Strategies for Water Distribution Pipes

The ability to detect leaks in municipal water distribution pipes is a critical aspect of leakage management programs. This Update reviews several strategies used to survey for leaks using acoustic equipment and presents recent experience with regard to their performance.

Inhibiting Chloride-Induced Corrosion in Concrete Bridges

The use of de-icing salts can significantly reduce the service life of concrete transportation structures by causing corrosion of the reinforcing steel. This Update provides guidance on controlling corrosion, drawing on a ten-year study to assess the performance of eight commercial corrosion-inhibiting systems on a concrete highway bridge.

Slipline Rehabilitation of Watermains with High-Density Polyethylene Pipe

Sliplining is a trenchless pipe rehabilitation technology that offers many advantages compared with traditional open-cut and cover methods. This Update presents information on sliplining installation, performance and cost, based on recent work at NRC’s Institute for Research in Construction.

Behaviour and Performance of Concrete Sidewalks

Sidewalks are key elements of urban infrastructure, have a high replacement cost and often fail prematurely. This Update reviews current construction practices and the types of deformation and damage that reduce service life.

Preventing Concrete Deterioration Due to Alkali-Aggregate Reaction

Alkali-aggregate reaction is a common cause of concrete cracking that results in significant damage to concrete structures worldwide. This Update explains the mechanisms of alkali-aggregate reaction, its effects on concrete and methods for preventing deterioration from this cause in new construction.

Sealing Cracks in Asphalt Concrete Pavements

This Update gives insights into the preventive maintenance of asphalt concrete pavements. The aim is to extend the life of these pavements through sealing practices that achieve results with better than usual performance.

Curling of Concrete Slabs on Grade

This Update reviews the causes of curling in on-grade concrete slabs and discusses methods of repair for various environmental conditions.

Detecting Leaks in Water-Distribution Pipes

This Update gives an overview of techniques and equipment used to detect leaks in water-distribution systems. The information is based on recent research conducted by IRC.