710 - Waterproofing and Protective Covers - Revision history

McGowanR: /* Joint Waterproofing- Preformed */ Fixed broken link for QPL

2019-01-17T18:52:52Z

Joint Waterproofing- Preformed: Fixed broken link for QPL

Greenes2 at 12:26, 28 May 2014

2014-05-28T12:26:31Z

Greenes2: /* Shotcrete */

2014-05-28T12:25:52Z

Shotcrete

Greenes2: /* Joint Waterproofing- Preformed */

2014-05-28T12:25:17Z

Joint Waterproofing- Preformed

Greenes2 at 19:38, 27 May 2014

2014-05-27T19:38:31Z

Greenes2 at 18:06, 27 May 2014

2014-05-27T18:06:21Z

HarrisR18: /* GENERAL */

2014-05-27T17:39:31Z

GENERAL

Rinarda at 13:50, 24 July 2013

2013-07-24T13:50:49Z

Rinarda at 18:35, 25 June 2013

2013-06-25T18:35:25Z

Rinarda at 14:51, 11 June 2013

2013-06-11T14:51:39Z

@@ Line 4: / Line 4: @@
 <center><span STYLE="font: 40pt arial;">'''Waterproofing and Protective Covers'''</span></center>
-<center>[http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 710]</center>
+<center>[https://mdotjboss.state.mi.us/SpecProv/getDocumentById.htm?docGuid=e8f36d78-791f-451e-ac69-c29917c49fae&fileName=%22710%20Wtrpr,%20Protective%20Covers.pdf%22 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 710]</center>
@@ Line 12: / Line 12: @@
 Joint waterproofing is conducted at locations where a concrete joint is located below grade thus creating the potential for leaking or seepage due to infiltration through the soils.  An example of a common joint that requires joint waterproofing is the joint between the abutment bridge seat and backwall.
-The joint waterproofing material is a preformed membrane that is applied to the back side of the joint to be sealed per the project plans.  The membrane is a minimum 18 inches wide and typically requires a prime coat for adhesion per manufacturer’s recommendations.  This joint is then covered with backfill as soon as practical to avoid sagging in the membrane.  Approved membranes can be found in the [http://michigan.gov/documents/MDOT-Material_Source_Guide_Qualified_Products_84764_7.pdf Qualified Products List section 914.11].
+The joint waterproofing material is a preformed membrane that is applied to the back side of the joint to be sealed per the project plans.  The membrane is a minimum 18 inches wide and typically requires a prime coat for adhesion per manufacturer’s recommendations.  This joint is then covered with backfill as soon as practical to avoid sagging in the membrane.  Approved membranes can be found in the [https://www.michigan.gov/documents/mdot/MDOT-MaterialSourceGuideComplete_Linked_181739_7.pdf Qualified Products List section 914.11].
 :'''A.''' The integrity of the membrane and its waterproofing capabilities relies upon the bond between the membrane adhesive and the concrete.  The membrane is to be applied within 4 hours of removing the form work at the location requiring the waterproofing.  The air and concrete temperatures must be greater than 40 degrees prior to beginning surface preparation.  The 4 hour requirement may be adjusted accordingly to meet the temperature limitations.  The surface of the concrete must be dry, clean and free from sharp edges or intrusions. Ensure the contractor fills any surface with a MDOT approved epoxy mortar, mortar, or concrete.  These patches must be cured for 24 hours prior to placement of the membrane.   Abrasive blasting with compressed, oil-free air is required to remove all contaminates and prepare the surface for the membrane.  The surface is to be prepared and primed 12 inches either side of the joint to accommodate the 18 inch membrane.
-:'''B.''' Apply the membrane in accordance with the manufacturer’s recommendations and [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf section 710 of the Standard Specifications for Construction].  Prior to backfilling the engineer may require the contractor to demonstrate the membrane is adhered to the concrete and free from wrinkles and tears.  Any tears in the membrane may be patched with additional membrane material overlapping 6 inches either side of the area to be patched.
+:'''B.''' Apply the membrane in accordance with the manufacturer’s recommendations and [https://mdotjboss.state.mi.us/SpecProv/getDocumentById.htm?docGuid=e8f36d78-791f-451e-ac69-c29917c49fae&fileName=%22710%20Wtrpr,%20Protective%20Covers.pdf%22 section 710 of the Standard Specifications for Construction].  Prior to backfilling the engineer may require the contractor to demonstrate the membrane is adhered to the concrete and free from wrinkles and tears.  Any tears in the membrane may be patched with additional membrane material overlapping 6 inches either side of the area to be patched.
 {{top}}
@@ Line 29: / Line 29: @@
 ====[[#Deck Waterproofing with HMA Overlay|Deck Waterproofing with HMA Overlay]]====
-Bridge deck waterproofing with HMA overlay is applied per [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf subsection 710.03.C of the Standard Specifications for Construction].  HMA overlays are susceptible to water permeation, and the waterproofing membrane is critical is preserving the concrete deck below the HMA overlay.  In this regard care should be taken to adhere to specifications when placing the waterproofing membrane to ensure the membrane is applied correctly and not damaged during placement of the HMA.
+Bridge deck waterproofing with HMA overlay is applied per [https://mdotjboss.state.mi.us/SpecProv/getDocumentById.htm?docGuid=e8f36d78-791f-451e-ac69-c29917c49fae&fileName=%22710%20Wtrpr,%20Protective%20Covers.pdf%22 subsection 710.03.C of the Standard Specifications for Construction].  HMA overlays are susceptible to water permeation, and the waterproofing membrane is critical is preserving the concrete deck below the HMA overlay.  In this regard care should be taken to adhere to specifications when placing the waterproofing membrane to ensure the membrane is applied correctly and not damaged during placement of the HMA.
 {{top}}
@@ Line 36: / Line 36: @@
 Shotcreting is a method of applying latex modified concrete to patch locations by means of pneumatically ejected concrete material mixed with the latex at the nozzle.  Shotcrete is typically used for substructure repairs where forming and/or concrete placement by conventional means is difficult.
-Shotcrete equipment and materials can be difficult to calibrate and apply to the substrate.  In this regard shotcreting is very dependent upon the skill of the operator or “nozzleman”.  Test panels are required to demonstrate to the engineer the ability of the nozzleman to provide a satisfactory patch.  The test panel should replicate the field placement in terms of thickness and steel reinforcing pattern, but be at least 3 inches thick.  After test panel placement, the concrete must be kept continuously wet and above 40 degrees for at least 5 days.  Five cores must then be taken from the panel and tested in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf subsection 710.03.D.1 of the Standard Specifications for Construction].
+Shotcrete equipment and materials can be difficult to calibrate and apply to the substrate.  In this regard shotcreting is very dependent upon the skill of the operator or “nozzleman”.  Test panels are required to demonstrate to the engineer the ability of the nozzleman to provide a satisfactory patch.  The test panel should replicate the field placement in terms of thickness and steel reinforcing pattern, but be at least 3 inches thick.  After test panel placement, the concrete must be kept continuously wet and above 40 degrees for at least 5 days.  Five cores must then be taken from the panel and tested in accordance with [https://mdotjboss.state.mi.us/SpecProv/getDocumentById.htm?docGuid=e8f36d78-791f-451e-ac69-c29917c49fae&fileName=%22710%20Wtrpr,%20Protective%20Covers.pdf%22 subsection 710.03.D.1 of the Standard Specifications for Construction].
 :'''A.''' Prior to shotcrete placement for concrete patches all loose material must be removed from the patch.  Edges surrounding the patch must be saw cut ½ inch.  Care should be taken not to damage sound surrounding concrete during removal operations.  After concrete removal, the areas to be patch must be blast cleaned with a compressed, oil-free air to remove all contaminates.
 :'''B.''' Ensure the contractor uses galvanized or epoxy coated reinforcement wire for all patches greater than 2 inches deep.  The reinforcement should be placed at mid depth of the repair, or at least 1 inch from the face of the repair.  Ensure the contractor uses stainless steel anchors spaced no more than 18 inches on center in each direction.
-:'''C.''' Immediately prior to shotcrete placement the patch must be wetted with the liquid latex component to be used during the shotcrete operation.  Place shotcrete in several passes until the required thickness is met.  Large areas may be broken down into smaller sections for placement; however, the final thickness must be achieved prior to moving to the next section.  Laminations in the shotcrete should be avoided.  The nozzleman must keep the nozzle 2 to 6 feet away from the surface and as near as perpendicular to the surface as possible.  Do not apply shotcrete if high winds prevent proper application, the surface temperature of the concrete is less than 45 degrees, or during rain causing washouts or sloughing of the fresh concrete.  Place shotcrete in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf section 710.03.D.3 of the Standard Specifications for Construction.]
+:'''C.''' Immediately prior to shotcrete placement the patch must be wetted with the liquid latex component to be used during the shotcrete operation.  Place shotcrete in several passes until the required thickness is met.  Large areas may be broken down into smaller sections for placement; however, the final thickness must be achieved prior to moving to the next section.  Laminations in the shotcrete should be avoided.  The nozzleman must keep the nozzle 2 to 6 feet away from the surface and as near as perpendicular to the surface as possible.  Do not apply shotcrete if high winds prevent proper application, the surface temperature of the concrete is less than 45 degrees, or during rain causing washouts or sloughing of the fresh concrete.  Place shotcrete in accordance with [https://mdotjboss.state.mi.us/SpecProv/getDocumentById.htm?docGuid=e8f36d78-791f-451e-ac69-c29917c49fae&fileName=%22710%20Wtrpr,%20Protective%20Covers.pdf%22 section 710.03.D.3 of the Standard Specifications for Construction.]
 :'''D.''' Cure shotcrete in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/706%20Str%20Conc%20Construction.pdf subsection 706.03.N.3 of the Standard Specifications of Construction.]
-:'''E.''' The engineer may require cutting cores from the completed work for compression testing.  If tests are order, three samples should be taken and tested in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf subsection 710.03.D.1 of the Standard Specifications for Construction.]
+:'''E.''' The engineer may require cutting cores from the completed work for compression testing.  If tests are order, three samples should be taken and tested in accordance with [https://mdotjboss.state.mi.us/SpecProv/getDocumentById.htm?docGuid=e8f36d78-791f-451e-ac69-c29917c49fae&fileName=%22710%20Wtrpr,%20Protective%20Covers.pdf%22 subsection 710.03.D.1 of the Standard Specifications for Construction.]
 {{top}}

← Older revision		Revision as of 12:26, 28 May 2014
Line 6:		Line 6:
	<center>[http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 710]</center>		<center>[http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 710]</center>

−	~~<span style="color: red"> -'''This Section Currently Undergoing Substantial Revision-''' </span>~~

	==[[#GENERAL\|GENERAL]]==		==[[#GENERAL\|GENERAL]]==

@@ Line 38: / Line 38: @@
 Shotcrete equipment and materials can be difficult to calibrate and apply to the substrate.  In this regard shotcreting is very dependent upon the skill of the operator or “nozzleman”.  Test panels are required to demonstrate to the engineer the ability of the nozzleman to provide a satisfactory patch.  The test panel should replicate the field placement in terms of thickness and steel reinforcing pattern, but be at least 3 inches thick.  After test panel placement, the concrete must be kept continuously wet and above 40 degrees for at least 5 days.  Five cores must then be taken from the panel and tested in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf subsection 710.03.D.1 of the Standard Specifications for Construction].
-*'''A.''' Prior to shotcrete placement for concrete patches all loose material must be removed from the patch.  Edges surrounding the patch must be saw cut ½ inch.  Care should be taken not to damage sound surrounding concrete during removal operations.  After concrete removal, the areas to be patch must be blast cleaned with a compressed, oil-free air to remove all contaminates.
+:'''B.''' Ensure the contractor uses galvanized or epoxy coated reinforcement wire for all patches greater than 2 inches deep.  The reinforcement should be placed at mid depth of the repair, or at least 1 inch from the face of the repair.  Ensure the contractor uses stainless steel anchors spaced no more than 18 inches on center in each direction.
-*'''B.''' Ensure the contractor uses galvanized or epoxy coated reinforcement wire for all patches greater than 2 inches deep.  The reinforcement should be placed at mid depth of the repair, or at least 1 inch from the face of the repair.  Ensure the contractor uses stainless steel anchors spaced no more than 18 inches on center in each direction.
+:'''C.''' Immediately prior to shotcrete placement the patch must be wetted with the liquid latex component to be used during the shotcrete operation.  Place shotcrete in several passes until the required thickness is met.  Large areas may be broken down into smaller sections for placement; however, the final thickness must be achieved prior to moving to the next section.  Laminations in the shotcrete should be avoided.  The nozzleman must keep the nozzle 2 to 6 feet away from the surface and as near as perpendicular to the surface as possible.  Do not apply shotcrete if high winds prevent proper application, the surface temperature of the concrete is less than 45 degrees, or during rain causing washouts or sloughing of the fresh concrete.  Place shotcrete in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf section 710.03.D.3 of the Standard Specifications for Construction.]
-*'''C.''' Immediately prior to shotcrete placement the patch must be wetted with the liquid latex component to be used during the shotcrete operation.  Place shotcrete in several passes until the required thickness is met.  Large areas may be broken down into smaller sections for placement; however, the final thickness must be achieved prior to moving to the next section.  Laminations in the shotcrete should be avoided.  The nozzleman must keep the nozzle 2 to 6 feet away from the surface and as near as perpendicular to the surface as possible.  Do not apply shotcrete if high winds prevent proper application, the surface temperature of the concrete is less than 45 degrees, or during rain causing washouts or sloughing of the fresh concrete.  Place shotcrete in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf section 710.03.D.3 of the Standard Specifications for Construction.]
+:'''D.''' Cure shotcrete in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/706%20Str%20Conc%20Construction.pdf subsection 706.03.N.3 of the Standard Specifications of Construction.]
-*'''D.''' Cure shotcrete in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/706%20Str%20Conc%20Construction.pdf subsection 706.03.N.3 of the Standard Specifications of Construction.]
+:'''E.''' The engineer may require cutting cores from the completed work for compression testing.  If tests are order, three samples should be taken and tested in accordance with [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf subsection 710.03.D.1 of the Standard Specifications for Construction.]
 {{top}}

@@ Line 15: / Line 15: @@
 The joint waterproofing material is a preformed membrane that is applied to the back side of the joint to be sealed per the project plans.  The membrane is a minimum 18 inches wide and typically requires a prime coat for adhesion per manufacturer’s recommendations.  This joint is then covered with backfill as soon as practical to avoid sagging in the membrane.  Approved membranes can be found in the [http://michigan.gov/documents/MDOT-Material_Source_Guide_Qualified_Products_84764_7.pdf Qualified Products List section 914.11].
-*'''A.''' The integrity of the membrane and its waterproofing capabilities relies upon the bond between the membrane adhesive and the concrete.  The membrane is to be applied within 4 hours of removing the form work at the location requiring the waterproofing.  The air and concrete temperatures must be greater than 40 degrees prior to beginning surface preparation.  The 4 hour requirement may be adjusted accordingly to meet the temperature limitations.  The surface of the concrete must be dry, clean and free from sharp edges or intrusions. Ensure the contractor fills any surface with a MDOT approved epoxy mortar, mortar, or concrete.  These patches must be cured for 24 hours prior to placement of the membrane.   Abrasive blasting with compressed, oil-free air is required to remove all contaminates and prepare the surface for the membrane.  The surface is to be prepared and primed 12 inches either side of the joint to accommodate the 18 inch membrane.
+:'''A.''' The integrity of the membrane and its waterproofing capabilities relies upon the bond between the membrane adhesive and the concrete.  The membrane is to be applied within 4 hours of removing the form work at the location requiring the waterproofing.  The air and concrete temperatures must be greater than 40 degrees prior to beginning surface preparation.  The 4 hour requirement may be adjusted accordingly to meet the temperature limitations.  The surface of the concrete must be dry, clean and free from sharp edges or intrusions. Ensure the contractor fills any surface with a MDOT approved epoxy mortar, mortar, or concrete.  These patches must be cured for 24 hours prior to placement of the membrane.   Abrasive blasting with compressed, oil-free air is required to remove all contaminates and prepare the surface for the membrane.  The surface is to be prepared and primed 12 inches either side of the joint to accommodate the 18 inch membrane.
-*'''B.''' Apply the membrane in accordance with the manufacturer’s recommendations and [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf section 710 of the Standard Specifications for Construction].  Prior to backfilling the engineer may require the contractor to demonstrate the membrane is adhered to the concrete and free from wrinkles and tears.  Any tears in the membrane may be patched with additional membrane material overlapping 6 inches either side of the area to be patched.
+:'''B.''' Apply the membrane in accordance with the manufacturer’s recommendations and [http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf section 710 of the Standard Specifications for Construction].  Prior to backfilling the engineer may require the contractor to demonstrate the membrane is adhered to the concrete and free from wrinkles and tears.  Any tears in the membrane may be patched with additional membrane material overlapping 6 inches either side of the area to be patched.
 {{top}}
 ====[[#Expansion Joint Waterproofing – Preformed|Expansion Joint Waterproofing – Preformed]]====

@@ Line 22: / Line 22: @@
 ====[[#Expansion Joint Waterproofing – Preformed|Expansion Joint Waterproofing – Preformed]]====
-Expansion joint waterproofing is used at locations indicated in the plans as expansion joints in the substructure, or at integral and semi-integral backwall abutment locations.  Expansion joint waterproofing in applied in similar fashion to the joint waterproofing described in 710.01 of the Construction Manual except that a bond breaker and two layers of membrane will be used.
+Expansion joint waterproofing is used at locations indicated in the plans as expansion joints in the substructure, or at integral and semi-integral backwall abutment locations.  Expansion joint waterproofing in applied in similar fashion to the joint waterproofing described in  [[710_-_Waterproofing_and_Protective_Covers#Joint_Waterproofing-_Preformed|Joint Waterproofing - Preformed]] in the Construction Manual except that a bond breaker and two layers of membrane will be used.
-The beveled surfaces at the expansion joint location will not receive the prime coat and will instead receive a bond breaker to prevent adhesion of the membrane at this location.  This allows for rotation, expansion and contraction of the substructure at this location without tearing the membrane.  Place the bond breaker at the beveled surfaces, then prime the surface 12 inches either side of the joint.  Place the membrane per 710.01 of the Construction Manual ensuring the membrane follows the contour of the beveled surfaces. This “slack” in the membrane allows for the required expansion.   A second layer of membrane must then be placed over the first layer.  Prime the first layer per manufacturer’s recommendations.  A bond breaker is not needed for the second coat.  Apply the second layer of membrane and backfill after adhesion amongst the layers and concrete has been demonstrated.
+The beveled surfaces at the expansion joint location will not receive the prime coat and will instead receive a bond breaker to prevent adhesion of the membrane at this location.  This allows for rotation, expansion and contraction of the substructure at this location without tearing the membrane.  Place the bond breaker at the beveled surfaces, then prime the surface 12 inches either side of the joint.  Place the membrane per the section on [[710_-_Waterproofing_and_Protective_Covers#Joint_Waterproofing-_Preformed|Joint Waterproofing - Preformed]] in the Construction Manual ensuring the membrane follows the contour of the beveled surfaces. This “slack” in the membrane allows for the required expansion.   A second layer of membrane must then be placed over the first layer.  Prime the first layer per manufacturer’s recommendations.  A bond breaker is not needed for the second coat.  Apply the second layer of membrane and backfill after adhesion amongst the layers and concrete has been demonstrated.
 {{top}}

← Older revision		Revision as of 18:06, 27 May 2014
Line 6:		Line 6:
	<center>[http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 710]</center>		<center>[http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 710]</center>

		+	<span style="color: red"> -'''This Section Currently Undergoing Substantial Revision-''' </span>

	==[[#GENERAL\|GENERAL]]==		==[[#GENERAL\|GENERAL]]==

@@ Line 9: / Line 9: @@
 ==[[#GENERAL|GENERAL]]==
-Joint waterproofing is done just before placing backfill against the joint to be waterproofed.  The membrane has a tendency to sag or loosen if allowed to remain unsupported for too long, particularly in warm weather.  Also, it is more likely to be damaged while exposed.
+====[[#Joint Waterproofing- Preformed|Joint Waterproofing- Preformed]]====
-New concrete, including repair areas, must be at least seven days old before applying the prime coat.  Dust must be removed from the concrete surface by brush-blasting with compressed, oil-free air.  The surfaces should be examined and must be dry, clean and smooth, with all sharp protrusions removed.  All materials must be as specified.  The actual application is as outlined in the standard specifications where a detailed account of procedures, quantities and temperature requirements will be found.
+The joint waterproofing material is a preformed membrane that is applied to the back side of the joint to be sealed per the project plans.  The membrane is a minimum 18 inches wide and typically requires a prime coat for adhesion per manufacturer’s recommendations.  This joint is then covered with backfill as soon as practical to avoid sagging in the membrane.  Approved membranes can be found in the [http://michigan.gov/documents/MDOT-Material_Source_Guide_Qualified_Products_84764_7.pdf Qualified Products List section 914.11].
-Upon completion, the joint should be protected from damage by adjacent operations.  Just before placing backfill carefully examine the material for cracks, breaks, or tears that will reduce its effectiveness.  When backfilling, special care is needed to avoid damaging the material with compaction equipment.  The joint waterproofing is measured in place and the dimensions entered in the field book to verify final pay quantity.
+*'''A.''' The integrity of the membrane and its waterproofing capabilities relies upon the bond between the membrane adhesive and the concrete.  The membrane is to be applied within 4 hours of removing the form work at the location requiring the waterproofing.  The air and concrete temperatures must be greater than 40 degrees prior to beginning surface preparation.  The 4 hour requirement may be adjusted accordingly to meet the temperature limitations.  The surface of the concrete must be dry, clean and free from sharp edges or intrusions. Ensure the contractor fills any surface with a MDOT approved epoxy mortar, mortar, or concrete.  These patches must be cured for 24 hours prior to placement of the membrane.   Abrasive blasting with compressed, oil-free air is required to remove all contaminates and prepare the surface for the membrane.  The surface is to be prepared and primed 12 inches either side of the joint to accommodate the 18 inch membrane.
 {{top}}

@@ Line 7: / Line 7: @@
-==GENERAL==
+==[[#GENERAL|GENERAL]]==
 Joint waterproofing is done just before placing backfill against the joint to be waterproofed.  The membrane has a tendency to sag or loosen if allowed to remain unsupported for too long, particularly in warm weather.  Also, it is more likely to be damaged while exposed.
@@ Line 17: / Line 17: @@
 {{top}}
-==MATERIALS==
+==[[#MATERIALS|MATERIALS]]==
 <span style="color: red"> -Reserved- </span>
@@ Line 23: / Line 23: @@
 {{top}}
-==CONSTRUCTION==
+==[[#CONSTRUCTION|CONSTRUCTION]]==
 <span style="color: red"> -Reserved- </span>
@@ Line 29: / Line 29: @@
 {{top}}
-==MEASUREMENT AND PAYMENT==
+==[[#MEASUREMENT AND PAYMENT|MEASUREMENT AND PAYMENT]]==
 <span style="color: red"> -Reserved- </span>
 {{top}}

← Older revision		Revision as of 14:51, 11 June 2013
Line 1:		Line 1:
−	~~710 - Waterproofing and Protective Covers~~

−	* [[710.01 - ~~General]~~]	+	<center><span STYLE="font: 60pt arial;">'''710'''</span></center>
		+
		+	<center><span STYLE="font: 40pt arial;">'''Waterproofing and Protective Covers'''</span></center>
		+
		+	<center>[http://mdotcf.state.mi.us/public/specbook/files/2012/710%20Wtrpr,%20Protective%20Covers.pdf 2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 710]</center>
		+
		+
		+	==GENERAL==
		+
		+	Joint waterproofing is done just before placing backfill against the joint to be waterproofed. The membrane has a tendency to sag or loosen if allowed to remain unsupported for too long, particularly in warm weather. Also, it is more likely to be damaged while exposed.
		+
		+	New concrete, including repair areas, must be at least seven days old before applying the prime coat. Dust must be removed from the concrete surface by brush-blasting with compressed, oil-free air. The surfaces should be examined and must be dry, clean and smooth, with all sharp protrusions removed. All materials must be as specified. The actual application is as outlined in the standard specifications where a detailed account of procedures, quantities and temperature requirements will be found.
		+
		+	Upon completion, the joint should be protected from damage by adjacent operations. Just before placing backfill carefully examine the material for cracks, breaks, or tears that will reduce its effectiveness. When backfilling, special care is needed to avoid damaging the material with compaction equipment. The joint waterproofing is measured in place and the dimensions entered in the field book to verify final pay quantity.
		+
		+
		+	==MATERIALS==
		+
		+	<span style="color: red"> -Reserved- </span>
		+
		+
		+	==CONSTRUCTION==
		+
		+	<span style="color: red"> -Reserved- </span>
		+
		+
		+	==MEASUREMENT AND PAYMENT==
		+
		+	<span style="color: red"> -Reserved- </span>