September 14, 2014

On Further Review, the South Napa Earthquake was a Success Story for Buildings

Abstract: At 3 a.m. on Sunday, Aug. 24, a magnitude-6.0 earthquake centered in the American Canyon, about 9 kilometers south of the city of Napa, awoke much of northern California. The next day, television newscasts focused on damage sustained by...

August 30, 2014

To Test or Not To Test...? Glazing, roofing, masonry and air barriers: A guide to field quality control

Abstract: When properly applied, tests can yield valuable insight into the installed performance of systems, aid investigators in determining the cause of a failure, or help to determine if a product is performing to its intended level. However,...

August 30, 2014

Structural Analysis of Deeply Buried Flexible Pipe at Waste Disposal Sites

Abstract: Waste disposal sites require subsurface gravity pipe systems to collect waste leachate and safely convey it to treatment and disposal facilities. As the availability of suitable land for waste disposal sites decreases and the cost to...

August 30, 2014

What to Do After a Failure of PCCP: Forensic Evaluation of Pipe Failure in Green Bay

By: Rasko Ojdrovic, Livingston, Bryon, Powell, Brian

Abstract: The Green Bay Water Utility (GBWU) proactively conducted an electromagnetic inspection in 2010 of three 36 in. diameter Water Transmission mains (about 25 miles total length) that deliver water between the Water Treatment plant and the...

August 30, 2014

Fifteen Years of Lessons Learned: Design and Construction of CFRP Liners for Large Diameter Pipelines

By: Rasko Ojdrovic, Pridmore , A.B., Geraghty, M.

Abstract: Strengthening of pressure pipelines using carbon fiber reinforced polymer (CFRP) materials has been an accepted repair method since the late 1990’s. CFRP composites are high strength, non-corrosive and durable materials and can...

August 30, 2014

CFRP Renewal of PCCP - an Overview

Abstract: This paper presents the results of a three year research program on carbon fiber reinforced polymer (CFRP) renewal of Prestressed Concrete Cylinder Pipe (PCCP) sponsored by Water Research Foundation to form the theoretical and...

August 30, 2014

Design Innovation: No Ceiling [Innovation skyrockets for Boston tunnel repair]

By: Cory Brett, Scott DiFiore, Blanchard, Chris

Abstract: The Hynes Convention Center is located in the heart of Boston’s historic Back Bay neighborhood. Portions of the Hynes are located directly over I-90, the Massachusetts Turnpike. A 50-year-old cast-in-place concrete slab, suspended...

August 30, 2014

Experimental Basis of CFRP Renewal of PCCP

Abstract: This paper presents the results of the experimental phase of a three year research program sponsored in part by Water Research Foundation (WRF) to form the experimental basis of an American Water Works Association (AWWA) Standard on...

August 30, 2014

Post-Installed Anchors - The Present State of the Industry

By: Neal Anderson, Meinheit, Donald F.

Abstract: Formal concrete anchorage design provisions first appeared in ACI 318-02 as Appendix D, with applications limited to cast-in-place anchors and post-installed mechanical expansion anchors. The codified design provisions represented a...

August 30, 2014

Cure Behavior of Epoxies Used for CFRP Repair of Pipelines

By: Murat Engindeniz, Rasko Ojdrovic, Arnold, Scott, Jimenez, Tomas

Abstract: This paper presents the results of a laboratory testing program on the curing behavior of one impregnating epoxy (Tyfo® S) and one thickened epoxy (Tyfo® WS) that are most commonly used in carbon fiber reinforced polymer (CFRP)...