Difference between revisions of "771.17 Concrete Crack Filler - Low Viscosity Polymer (LVP)"

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|'''Code:''' R327
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|'''Code:''' R322
 
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LVP bridge deck crack fillers seal bridge decks with hairline shrinkage cracks to prevent intrusion of water and chlorides into the bridge deck or overlay. The following conditions should be considered when applying polymer crack fillers.
  
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Bridge deck crack pouring to seal bridge deck cracks to prevent intrusion of water and chlorides into bridge deck or overlay. The work should be performed in April, May, September, and October weather permitting with temperatures above 40 degrees.
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:* LVP crack fillers can be used for filling any size cracks. It is best used as needed for hairline cracks that are narrower than 1/128”.
  
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==Materials==
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:* The work should be performed in temperatures below 75°F. Applying the product in cooler weather allows better crack penetration.
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Recommended material is Pavon In-Deck with water to form 50/50 mixture. Other crack sealing materials may be available and should be applied according to manufacturer’s recommendations.
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:* Decks should be cleaned and pressure washed (2500 psi minimum) and allowed to dry 3 days prior to polymer application and 2 days after any measureable precipitation.
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:* Cover expansion devices or other features that are not to be sealed over.
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:* Apply polymer at a rate of 100 sq. ft./gal. of deck surface.
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:* Use a squeegee or broom to spread polymer uniformly over bridge deck.
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:* Broadcast sand at a rate of 1 to 2 lbs./sq. yd. to treat deck surface prior to cure.  
  
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==Procedures==
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Reapplication should be considered as needed.
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1. Deck should be relatively dry, some dampness is permissible but no standing water.
 
  
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2. Make sure area around cracks are clean by removing dirt and debris.
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==Materials==
  
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3. Premix Pavon In-Deck with water to form a 50/50 mixture.
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LVP should be applied according to manufacturer’s recommendations. Refer to Sec 1053.20 for specification.
  
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4. Material should be poured along crack in a thin bead.
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==Health, Environment & Guidance==
  
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5. Allow product to seep into crack for 10 to 15 minutes, then use squeegee to spread out material. If necessary, repeat application.
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Work crews should wear appropriate [[:Category:132 Safety#Personal Protective Equipment (PPE)|PPE]] and follow manufacturer’s recommendations when applying. Runoff from crack filling needs to be controlled to prevent contamination of waterways and property damage. Refer to MSDS additional information. See [[:Category:170 Maintenance Activity Planning Guidelines#R322 Bridge Preventative Maintenance|R322 Bridge Seal Coats Maintenance Planning Guidelines]] for additional information.
  
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6. Allow material to dry and if necessary apply sand to the surface to blot excess material to prevent tracking by traffic.
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[[Category:771 Bridge Preventative Maintenance Guidelines|771.16]]
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[[Category:771 Bridge Preventive Maintenance Guidelines|771.17]]

Latest revision as of 09:52, 22 November 2016

Code: R322

LVP bridge deck crack fillers seal bridge decks with hairline shrinkage cracks to prevent intrusion of water and chlorides into the bridge deck or overlay. The following conditions should be considered when applying polymer crack fillers.

  • LVP crack fillers can be used for filling any size cracks. It is best used as needed for hairline cracks that are narrower than 1/128”.
  • The work should be performed in temperatures below 75°F. Applying the product in cooler weather allows better crack penetration.
  • Decks should be cleaned and pressure washed (2500 psi minimum) and allowed to dry 3 days prior to polymer application and 2 days after any measureable precipitation.
  • Cover expansion devices or other features that are not to be sealed over.
  • Apply polymer at a rate of 100 sq. ft./gal. of deck surface.
  • Use a squeegee or broom to spread polymer uniformly over bridge deck.
  • Broadcast sand at a rate of 1 to 2 lbs./sq. yd. to treat deck surface prior to cure.

Reapplication should be considered as needed.

Materials

LVP should be applied according to manufacturer’s recommendations. Refer to Sec 1053.20 for specification.

Health, Environment & Guidance

Work crews should wear appropriate PPE and follow manufacturer’s recommendations when applying. Runoff from crack filling needs to be controlled to prevent contamination of waterways and property damage. Refer to MSDS additional information. See R322 Bridge Seal Coats Maintenance Planning Guidelines for additional information.

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