Click for next page ( 59

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement

Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

Do not use for reproduction, copying, pasting, or reading; exclusively for search engines.

OCR for page 58
48 Familiarity with product components. Contractor selects from the QPL. The contractor typically requests approval to use one of the approved membranes. Selection depends on where the bridge is located and safety/traffic concerns in replacing or repairing the waterproofing system. We have considered alternative systems and used them occasionally for unusual applications or on a trial basis, but the hot applied waterproofing membrane system has remained the most cost-effective for general use. Very easy to put in place with machines and well-performing membranes. 6. DESIGN DETAILS 13. Does your agency have standard details for the following: Percentage Response a. Installing waterproofing membranes b. Terminating edges of membranes c. Curb details for membranes d. Concrete barrier details for use with membranes e. Over construction joints f. At expansion joints If the answer to any of the above is Yes, please provide the details.

OCR for page 58
49 Respondent Detail Alaska Our standard details are per the manufacturer's recommendations. Connecticut While we have no standard details, requirements for application, limits, and methodology are stipulated in great detail in the item specification for Membrane Waterproofing (woven glass fabric). Kansas In general, we request the contractor to provide and follow the manufacturer's specifications. For expansion joints, we gener- ally install a plug joint type of expansion joint. This joint requires at least 2 in. of asphalt cover to work. These joints seem to perform about as long as needed to match the membrane. We have details (generally bridge-specific) and specifications. Michigan Spec Book-- p. 461. New Hampshire NH does not truly have standard details. New York The Manufacturers Materials Details (approved list) offer details to address these conditions. Oregon see page1-262. Pennsylvania Use the manufacturer's details. See BC--788M Sheet 11 Bridge%20Construction%20Standards/bc788m_all.pdf Tennessee Mastic is to be applied at terminating edges, curbs, and concrete barriers. An extra layer of membrane is placed over small expansion joints (not strip seals or modular joints) prior to the main membrane application. Washington Most suppliers have readily available details. Alberta Section 16 "Bridge Deck Waterproofing" of the Specifications for Bridge Construction and Standard Drawing S-1443. Manitoba See Specifications for Bridge Construction, Section 16, Standard Drawing S-1443. New Brunswick 2006 Standard Specifications-- Nova Scotia Division 5 Section 9 14. Does your agency use any of the following products in conjunction with waterproofing membranes? Percentage Response a. Primers applied to the concrete b. Venting layers c. Separate adhesives to bond the membrane d. Seepage layers e. Protection board f. Tack coat g.Other If the answer to any of the above is Yes, please provide any additional details about the product's use.