Waterproofing Membranes for Concrete Bridge Decks (2012) / Chapter Skim
Currently Skimming:
Pages 33-39
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 33... ...
Hot rub berized asphalt membranes and spray-applied liquid mem · Uncoated reinforcing bars with rigid overlay, branes are less expensive than preformed sheet membranes. · Epoxy-coated reinforcing bars and a concrete surface sealer, In the survey for this synthesis, agencies were asked · Uncoated reinforcing bars protected with a waterproof- to provide unit costs for labor, equipment, and materials ing membrane and bituminous overlay, and for waterproofing membranes systems used on new and · Epoxy-coated reinforcing bars protected with a water- existing bridge decks.
|
From page 34... ...
· ASTM E96 Procedure B (Water Method) is an accept- · Visual inspection, able method to measure water vapor permeability.
|
From page 35... ...
The final rehaElectrical Methods bilitation cost was almost as high as the estimated cost for complete deck replacement. Virginia's standard specifications require that the waterproofing effectiveness of the membrane system be deter- Chain Drag and Hammer Soundings mined in accordance with Virginia Test Method T 39.
|
From page 36... ...
Separate pull-out tests using similar procedures to to detect the presence of anomalies. Thermography has the ASTM C900, Standard Test Method for Pullout Strength of ability to detect blisters in waterproofing membranes (28)
|
From page 37... ...
The expected ser- cost, and desired service life. vice life of waterproofing membranes is generally 16 to 20 · Approximately 50% of the agencies that use wateryears when installed on new bridge decks and anywhere proofing membranes do not have standard details relatbetween 6 and 20 years when installed on existing bridge ing to their installation.
|
From page 38... ...
with waterproofing systems, the three predominant · Begin placement of preformed membranes on the ones are lack of adhesion between the waterproofing low point of the deck and provide adequate lap membrane and the concrete deck, lack of adhesion between adjacent strips. between the waterproofing membrane and the asphalt · Stagger membrane overlaps in the transverse direction.
|
From page 39... ...
TRB Committee A3C15 -- provisions for life-cycle costing so that systems that offer Corrosion developed and submitted the following research superior performance can compete on an equitable basis with problem statement to the workshop: systems that have low initial cost but a short service life. Performance Specification for Bridge Deck Water- Objectives: Develop a performance specification for proofing Membrane Systems Problem: Waterproofing bridge deck waterproofing membrane systems based on a membranes can be an effective method of protecting both quantitative definition of performance requirements, objecthe concrete and embedded reinforcement in new and exist- tive prequalification tests, and a life-cycle cost analysis.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.