771.11 Bridge Joint Sealing - Silicone - Revision history

EPGsysop: updated link

2017-10-27T16:56:21Z

updated link

← Older revision		Revision as of 11:56, 27 October 2017
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	Silicone bridge joint sealing is done to prevent dirt, debris, and chlorides from deteriorating the deck and supporting bridge members. The work is done late April thru early June and mid September thru early November, weather permitting with temperatures between 55° F to 80° F. No significant precipitation within 36 hours prior to installation.		Silicone bridge joint sealing is done to prevent dirt, debris, and chlorides from deteriorating the deck and supporting bridge members. The work is done late April thru early June and mid September thru early November, weather permitting with temperatures between 55° F to 80° F. No significant precipitation within 36 hours prior to installation.

	See [[751.13 Expansion Devices#751.13.2 Silicone Expansion Joint ~~Sealant~~\|EPG 751.13.2 Silicone Expansion Joint ~~Sealant~~]] for general information on use and details.		See [[751.13 Expansion Devices#751.13.1.5 Silicone Seal Expansion Joint System\|EPG 751.13.1.5 Silicone Seal Expansion Joint System]] for general information on use and details.

	'''General Note''': Sealing of concrete-to-concrete bridge approach or deck joints with silicone material should only be done during moderate temperatures. Use silicone products only at concrete or steel joints, which are in good condition or in conjunction with Silspec 900 PNS.		'''General Note''': Sealing of concrete-to-concrete bridge approach or deck joints with silicone material should only be done during moderate temperatures. Use silicone products only at concrete or steel joints, which are in good condition or in conjunction with Silspec 900 PNS.

Smithk at 14:55, 22 November 2016

2016-11-22T14:55:21Z

← Older revision		Revision as of 09:55, 22 November 2016
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	[[Category:771 Bridge ~~Preventative~~ Maintenance Guidelines\|771.11]]		[[Category:771 Bridge Preventive Maintenance Guidelines\|771.11]]

Smithk: Per Maintc, updated activity code number

2014-10-16T15:42:48Z

Per Maintc, updated activity code number

← Older revision		Revision as of 10:42, 16 October 2014
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	{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"		{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"
	\|-		\|-
	\|'''Code:''' ~~R327~~		\|'''Code:''' R328
	\|}		\|}

Smithk: Per Bridge, silicone expansion joint systems is discontinued on future jobs.

2011-11-08T14:31:53Z

Per Bridge, silicone expansion joint systems is discontinued on future jobs.

← Older revision		Revision as of 09:31, 8 November 2011
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	Silicone bridge joint sealing is done to prevent dirt, debris, and chlorides from deteriorating the deck and supporting bridge members. The work is done late April thru early June and mid September thru early November, weather permitting with temperatures between 55 to ~~80 degrees~~. No significant precipitation within 36 hours prior to installation.		Silicone bridge joint sealing is done to prevent dirt, debris, and chlorides from deteriorating the deck and supporting bridge members. The work is done late April thru early June and mid September thru early November, weather permitting with temperatures between 55° F to 80° F. No significant precipitation within 36 hours prior to installation.

			See [[751.13 Expansion Devices#751.13.2 Silicone Expansion Joint Sealant\|EPG 751.13.2 Silicone Expansion Joint Sealant]] for general information on use and details.

	'''General Note''': Sealing of concrete-to-concrete bridge approach or deck joints with silicone material should only be done during moderate temperatures. Use silicone products only at concrete or steel joints, which are in good condition or in conjunction with Silspec 900 PNS.		'''General Note''': Sealing of concrete-to-concrete bridge approach or deck joints with silicone material should only be done during moderate temperatures. Use silicone products only at concrete or steel joints, which are in good condition or in conjunction with Silspec 900 PNS.
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	Use silicone when one of the following conditions is present in a concrete-to-concrete joint:		Use silicone when one of the following conditions is present in a concrete-to-concrete joint:

	1. Joints ~~which are~~ one inch or ~~less in width~~ that are very clean to work with and		1. Joints one inch or narrower that are very clean to work with and would require very little hand or mechanical cleaning to prepare. Use DOW890-SL.
	would require very little hand or mechanical cleaning to prepare. Use DOW890-SL.

	2. Joints ~~greater~~ than one inch ~~in width~~ but ~~less~~ than 2 ½ ~~inches wide~~, that are very clean to work with and would require only minimal mechanical or hand cleaning to prepare. Use DOW 902-RCS.		2. Joints wider than one inch but narrower than 2 ½ in., that are very clean to work with and would require only minimal mechanical or hand cleaning to prepare. Use DOW 902-RCS.

	==Materials==		==Materials==
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	{\|		{\|
	\|[[Image:771.11 Bridge Joint Sealing - Silicone1.jpg\|400px]] \|\| [[Image:771.11 Bridge Joint Sealing - ~~Silicone1~~.jpg\|400px]]		\|[[Image:771.11 Bridge Joint Sealing - Silicone1.jpg\|400px]] \|\| [[Image:771.11 Bridge Joint Sealing - Silicone2.jpg\|400px]]
	\|-		\|-
	\|'''Clean out as much of the existing old sealant and debris as possible to a depth three times the width of joint.''' \|\| '''Sandblast the joint faces with black beauty or other clean abrasives.'''		\|'''Clean out as much of the existing old sealant and debris as possible to a depth three times the width of joint.''' \|\| '''Sandblast the joint faces with black beauty or other clean abrasives.'''

EPG-Admin: Updated activity code.

2008-12-31T19:36:01Z

Updated activity code.

← Older revision		Revision as of 14:36, 31 December 2008
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	{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"		{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"
	\|-		\|-
	\|'''Code:''' ~~R321~~		\|'''Code:''' R327
	\|}		\|}

EPG-Admin: /* Procedures */

2007-12-26T15:23:29Z

Procedures

← Older revision		Revision as of 10:23, 26 December 2007
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	\|\|[[Image:771.11 Bridge Joint Sealing - Silicone5.jpg\|400px]] \|\| [[Image:771.11 Bridge Joint Sealing - Silicone6.jpg\|400px]]		\|\|[[Image:771.11 Bridge Joint Sealing - Silicone5.jpg\|400px]] \|\| [[Image:771.11 Bridge Joint Sealing - Silicone6.jpg\|400px]]
	\|-		\|-
	\|colspan="2"\|'''Thoroughly clean out Bazooka gun as recommended by manufacturer after completing installation.'''		\|align="center" colspan="2"\|'''Thoroughly clean out Bazooka gun as recommended by manufacturer after completing installation.'''
	\|}		\|}

	[[Category:771 Bridge Preventative Maintenance Guidelines\|771.11]]		[[Category:771 Bridge Preventative Maintenance Guidelines\|771.11]]

EPG-Admin: New page: {|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right" |- |'''Code:''' R321 |} Silicone...

2007-12-21T20:37:48Z

New page: {|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right" |- |'''Code:''' R321 |} Silicone...

New page

{|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"
|-
|'''Code:''' R321
|}

Silicone bridge joint sealing is done to prevent dirt, debris, and chlorides from deteriorating the deck and supporting bridge members. The work is done late April thru early June and mid September thru early November, weather permitting with temperatures between 55 to 80 degrees. No significant precipitation within 36 hours prior to installation.

'''General Note''': Sealing of concrete-to-concrete bridge approach or deck joints with silicone material should only be done during moderate temperatures. Use silicone products only at concrete or steel joints, which are in good condition or in conjunction with Silspec 900 PNS.

Use silicone when one of the following conditions is present in a concrete-to-concrete joint:

1. Joints which are one inch or less in width that are very clean to work with and
would require very little hand or mechanical cleaning to prepare. Use DOW890-SL.

2. Joints greater than one inch in width but less than 2 ½ inches wide, that are very clean to work with and would require only minimal mechanical or hand cleaning to prepare. Use DOW 902-RCS.

==Materials==
DOW 902-RCS, DOW 888, or 890-SL, Backer rod, Primer (Note: refer to Dow Corning table for appropriate primer required.)

==Procedures==
1. Perform any repairs to joint, as required, before attempting to do any silicone work. It is vital that concrete faces are in sound condition or the silicone will pull off the weak concrete. Joints repaired with concrete products shall be allowed to cure for fourteen days. Joints repaired with epoxy products shall be cured in accordance with manufacturer’s recommendations.

2. Using hand tools or other equipment as required, clean out as much of the existing old sealant and debris as possible to a depth three times the width of joint.

3. Sandblast the joint faces with black beauty or other clean abrasives.

4. Inspect vertical faces to assure that they are immaculately clean and no residue is present.

5. Prime the joint faces with recommended material and allow to cure as per manufacturer’s guidelines.

6. Install appropriate size backer rod to a completely snug fit but not over compressed. Installation of backer rod should be to a depth one half the joint width, plus an additional one half inch but not greater than 1 ¼” total depth below the roadway surface.

7. Install silicone with Bazooka gun for 902 or hand caulk gun for 890 to one half inch below roadway.

8. Thoroughly clean out Bazooka gun as recommended by manufacturer after completing installation.

{|
|[[Image:771.11 Bridge Joint Sealing - Silicone1.jpg|400px]] || [[Image:771.11 Bridge Joint Sealing - Silicone1.jpg|400px]]
|-
|'''Clean out as much of the existing old sealant and debris as possible to a depth three times the width of joint.''' || '''Sandblast the joint faces with black beauty or other clean abrasives.'''
|-
||[[Image:771.11 Bridge Joint Sealing - Silicone3.jpg|400px]] || [[Image:771.11 Bridge Joint Sealing - Silicone4.jpg|400px]]
|-
|'''Prime the joint faces with recommended material and allow to cure as per manufacturer's guidelines. Install appropriate backer size rod to a completely snug fit but not over compressed.''' || '''Install silicone with Bazooka gun for 902 or hand caulk gun for 890 to one-half inch below roadway.'''
|-
||[[Image:771.11 Bridge Joint Sealing - Silicone5.jpg|400px]] || [[Image:771.11 Bridge Joint Sealing - Silicone6.jpg|400px]]
|-
|colspan="2"|'''Thoroughly clean out Bazooka gun as recommended by manufacturer after completing installation.'''
|}

[[Category:771 Bridge Preventative Maintenance Guidelines|771.11]]