Category:703 Concrete Masonry Construction - Revision history

Smithk at 17:05, 3 November 2021

2021-11-03T17:05:35Z

← Older revision		Revision as of 12:05, 3 November 2021
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	its penetration into the surface. Non-uniform application results in streaking and mottled surface appearance. The inspector must insist on a clean surface and careful spreading of the material. Other requirements of [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=11 Sec 703] normally require only routine inspection attention.		its penetration into the surface. Non-uniform application results in streaking and mottled surface appearance. The inspector must insist on a clean surface and careful spreading of the material. Other requirements of [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=11 Sec 703] normally require only routine inspection attention.

	Unless permitted by Special Provisions, the structure shall not be opened to through traffic before deck is sealed. Essential construction traffic, such as ready mix trucks, self-propelled concrete buggies, concrete conveyor systems, and so forth, can be permitted where no practical alternative method of completing the structure is available. In all cases, traffic must be barred from the structure until the concrete has reached the compressive strength specified in [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=11 Sec 703].		Unless permitted by Special Provisions, the structure shall not be opened to through traffic before deck is sealed. Essential construction traffic, such as ready-mix trucks, self-propelled concrete buggies, concrete conveyor systems, and so forth, can be permitted where no practical alternative method of completing the structure is available. In all cases, traffic must be barred from the structure until the concrete has reached the compressive strength specified in [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=11 Sec 703].

	Rate of placement should be checked against specifications. The rate should be documented in a field book by listing the quantity of sealing material placed in each application and the computed surface area treated. As usual the entry must be dated and signed by the inspector. The rate of placement of sealant for low slump concrete is approximately one-half that for B-2		Rate of placement should be checked against specifications. The rate should be documented in a field book by listing the quantity of sealing material placed in each application and the computed surface area treated. As usual the entry must be dated and signed by the inspector. The rate of placement of sealant for low slump concrete is approximately one-half that for B-2

Smithk: Updated CM website link (for increased security)

2021-10-22T17:59:10Z

Updated CM website link (for increased security)

← Older revision		Revision as of 12:59, 22 October 2021
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	===703.2.12 Checklist===		===703.2.12 Checklist===
	[[image:703.2.12.jpg\|right\|350px]]		[[image:703.2.12.jpg\|right\|350px]]
	The [~~http~~://epg.modot.~~mo.gov~~/forms/CM/PODI_Bridge_Deck_Pour_Checklist.pdf PODI Bridge Deck Pour Checklist] is a guide to the inspector during the sequence of operations associated with a deck pour.		The [https://epg.modot.org/forms/CM/PODI_Bridge_Deck_Pour_Checklist.pdf PODI Bridge Deck Pour Checklist] is a guide to the inspector during the sequence of operations associated with a deck pour.

	===703.2.13 Form Removal===		===703.2.13 Form Removal===

Smithk: Per CM, removed archaic SiteManager info and replaced with AASHTOWARE info

2021-10-01T16:15:39Z

Per CM, removed archaic SiteManager info and replaced with AASHTOWARE info

← Older revision		Revision as of 11:15, 1 October 2021
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	===703.5.3 Sample Record===		===703.5.3 Sample Record===
	The sample record shall be completed in ~~SiteManager~~ as described in [[:Category:101 Standard Forms#Sample Record, General\|AWP MA Sample Record, General]]. Test results for concrete cylinders shall be reported on the appropriate templates under the Tests tab. The notation, "Specimens submitted for compressive strength at the age indicated and the tests are for informational purposes only" should be included in the sample record remarks.		The sample record shall be completed in AASHTOWARE Project (AWP) as described in [[:Category:101 Standard Forms#Sample Record, General\|AWP MA Sample Record, General]]. Test results for concrete cylinders shall be reported on the appropriate templates under the Tests tab. The notation, "Specimens submitted for compressive strength at the age indicated and the tests are for informational purposes only" should be included in the sample record remarks.

Smithk: /* 703.5 Laboratory Testing for Sec 703 */ Per CM, removed archaic SiteManager info and replaced with AASHTOWARE info

2021-09-14T13:21:08Z

703.5 Laboratory Testing for Sec 703: Per CM, removed archaic SiteManager info and replaced with AASHTOWARE info

← Older revision		Revision as of 08:21, 14 September 2021
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	===703.5.2 Procedure===		===703.5.2 Procedure===
	====703.5.2.1 Concrete Cylinders====		====703.5.2.1 Concrete Cylinders====
	Concrete cylinders shall be tested for compressive strength according to AASHTO T22. Test results and calculations shall be recorded through ~~SiteManager~~.		Concrete cylinders shall be tested for compressive strength according to AASHTO T22. Test results and calculations shall be recorded through AASHTOWARE Project (AWP).

	====703.5.2.2 Surface Sealers====		====703.5.2.2 Surface Sealers====
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	===703.5.3 Sample Record===		===703.5.3 Sample Record===
	The sample record shall be completed in SiteManager as described in [[:Category:101 Standard Forms#Sample Record General ~~Information~~\| Sample Record General ~~Information]] [[image:bulldozer.jpg\|20px~~]]. Test results for concrete cylinders shall be reported on the appropriate templates under the Tests tab. The notation, "Specimens submitted for compressive strength at the age indicated and the tests are for informational purposes only" should be included in the sample record remarks.		The sample record shall be completed in SiteManager as described in [[:Category:101 Standard Forms#Sample Record, General\|AWP MA Sample Record, General]]. Test results for concrete cylinders shall be reported on the appropriate templates under the Tests tab. The notation, "Specimens submitted for compressive strength at the age indicated and the tests are for informational purposes only" should be included in the sample record remarks.

Smithk at 17:44, 17 August 2021

2021-08-17T17:44:13Z

← Older revision		Revision as of 12:44, 17 August 2021
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	:3. Depth of excavation and its limits are frequently checked.		:3. Depth of excavation and its limits are frequently checked.
	:4. The district office is informed of any unusual soil conditions or unexpected rock found in the excavation.		:4. The district office is informed of any unusual soil conditions or unexpected rock found in the excavation.
	:5. Enough shoring is being used to ~~insure~~ safety and prevent ground movement.		:5. Enough shoring is being used to ensure safety and prevent ground movement.
	:6. The bottom of the excavation is at the correct grade, allowance having been made for final trimming.		:6. The bottom of the excavation is at the correct grade, allowance having been made for final trimming.
	:7. Arrangements have been made for any required bearing tests.		:7. Arrangements have been made for any required bearing tests.
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	===703.1.11 Forms===		===703.1.11 Forms===
	Forms must be constructed to dimensions shown on the plans. They should be properly tied and braced so correct dimensions are maintained during placement of concrete to ~~insure~~ an acceptable product after concrete has been cured. Before placing concrete, forms must be checked for conformance with plans and specifications and all irregularities corrected. The contractor should be informed of any needed corrections far enough in advance of a scheduled pour that they may be made without causing delay. The contractor designs forms and is responsible for the completed work.		Forms must be constructed to dimensions shown on the plans. They should be properly tied and braced so correct dimensions are maintained during placement of concrete to ensure an acceptable product after concrete has been cured. Before placing concrete, forms must be checked for conformance with plans and specifications and all irregularities corrected. The contractor should be informed of any needed corrections far enough in advance of a scheduled pour that they may be made without causing delay. The contractor designs forms and is responsible for the completed work.

	====703.1.11.1 Form Construction====		====703.1.11.1 Form Construction====

Smithk: Inclusive language

2021-06-03T12:55:49Z

Inclusive language

← Older revision		Revision as of 07:55, 3 June 2021
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	===703.1.8 Dewatering Excavation===		===703.1.8 Dewatering Excavation===
	Where concrete is to be placed in forms within an excavation, provisions must be made for removal of water from within the forms, both before and during concreting. Water to be removed from foundation enclosures by pumping must be drawn off in a way that permits no possibility of fine materials, such as cement or sand, being carried away by cross flow of water. The contractor must not be permitted to remove water by placing a suction hose inside the forms. He must develop a practical means of leading water by use of shallow ditches arranged to lead water to a collector ditch which in turn carries it under the forms to an outside sump. Satisfactory placement of concrete may sometimes by accomplished by using plastic polyethylene sheeting just ahead of concrete placement to force water through collector ditches under the forms into the sump. As soon as concrete covers the opening under the forms the opening should be plugged from outside the forms and only sufficient pumping done to lead water away until the concrete is set. No concrete should be placed under water without express permission from Division of Construction and Materials unless permitted or required by the contract.		Where concrete is to be placed in forms within an excavation, provisions must be made for removal of water from within the forms, both before and during concreting. Water to be removed from foundation enclosures by pumping must be drawn off in a way that permits no possibility of fine materials, such as cement or sand, being carried away by cross flow of water. The contractor must not be permitted to remove water by placing a suction hose inside the forms. The contractor must develop a practical means of leading water by use of shallow ditches arranged to lead water to a collector ditch which in turn carries it under the forms to an outside sump. Satisfactory placement of concrete may sometimes by accomplished by using plastic polyethylene sheeting just ahead of concrete placement to force water through collector ditches under the forms into the sump. As soon as concrete covers the opening under the forms the opening should be plugged from outside the forms and only sufficient pumping done to lead water away until the concrete is set. No concrete should be placed under water without express permission from Division of Construction and Materials unless permitted or required by the contract.

	===703.1.9 Footings - Foundations===		===703.1.9 Footings - Foundations===

Smithk: /* 703.2.12 Checklist */ updated link

2020-06-23T16:18:51Z

703.2.12 Checklist: updated link

← Older revision		Revision as of 11:18, 23 June 2020
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	===703.2.12 Checklist===		===703.2.12 Checklist===
	[[image:703.2.12.jpg\|right\|350px]]		[[image:703.2.12.jpg\|right\|350px]]
	The [~~[media~~: ~~703~~.2.~~12 PODI Bridge Deck Pour Checklist~~.pdf\|PODI Bridge Deck Pour Checklist]] is a guide to the inspector during the sequence of operations associated with a deck pour.		The [http://epg.modot.mo.gov/forms/CM/PODI_Bridge_Deck_Pour_Checklist.pdf PODI Bridge Deck Pour Checklist] is a guide to the inspector during the sequence of operations associated with a deck pour.

	===703.2.13 Form Removal===		===703.2.13 Form Removal===

Smithk: /* 703.2.12 Checklist */ Per CM, the new, FHWA-based "PODI Bridfe Deck Pour Checklist" form replaced the former textual guidance.

2020-06-23T14:08:19Z

703.2.12 Checklist: Per CM, the new, FHWA-based "PODI Bridfe Deck Pour Checklist" form replaced the former textual guidance.

@@ Line 403: / Line 403: @@
 ===703.2.12 Checklist===
 [[image:703.2.12.jpg|right|350px]]
-The following checklist is provided as a guide to the inspector during the sequence of operations associated with a deck pour.
+The [[media: 703.2.12 PODI Bridge Deck Pour Checklist.pdf|PODI Bridge Deck Pour Checklist]] is a guide to the inspector during the sequence of operations associated with a deck pour.
 ===703.2.13 Form Removal===

Smithk: /* 703.2.8 Concrete Placement */

2018-10-25T13:39:54Z

703.2.8 Concrete Placement

← Older revision		Revision as of 08:39, 25 October 2018
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	Vibration is an essential part of concrete placement. Its purpose should not, however, be confused with methods for distribution. Vibration is to densify, not move concrete.		Vibration is an essential part of concrete placement. Its purpose should not, however, be confused with methods for distribution. Vibration is to densify, not move concrete.

	Specified rates of concrete placement are minimum (not overall averages) and must be met for any one hour period during placement. These rates are often quite critical on steel structures		Specified rates of concrete placement are minimum (not overall averages) and must be met for any one hour period during placement. These rates are often quite critical on steel structures where reversal of stresses is involved. On structures supported on falsework, such as slabs or box girders, the rates are less critical from a structural standpoint but represent a minimum standard for quality workmanship. Rates in the latter case are related to finishing progress considered a minimum for satisfactory results. If placement rate lags seriously on a steel structure, it may become necessary to require installation of a temporary header. Resumption of placement would then depend on location of the emergency joint and results of strength tests on the concrete. Minor deficiencies in placement rate may not justify cessation of the pour but are a proper basis for refusing to permit additional pours until some arrangements have been made to improve placement. Unless problems other than deficiency in rate of placement develop during a pour on slab or box girder structures, the inspector may permit placement to continue to a standard joint shown on the plans but should not permit placement beyond that point or resumption of placement at a later date until changes have been made in the supply arrangements to maintain specified rate of placement. These actions should be documented by order records.
	where reversal of stresses is involved. On structures supported on falsework, such as slabs or box girders, the rates are less critical from a structural standpoint but represent a minimum standard for quality workmanship. Rates in the latter case are related to finishing progress considered a minimum for satisfactory results. If placement rate lags seriously on a steel structure, it may become necessary to require installation of a temporary header. Resumption of placement would then depend on location of the emergency joint and results of strength tests on the concrete. Minor deficiencies in placement rate may not justify cessation of the pour but are a proper basis for refusing to permit additional pours until some arrangements have been made to improve placement. Unless problems other than deficiency in rate of placement develop during a pour on slab or box girder structures, the inspector may permit placement to continue to a standard joint shown on the plans but should not permit placement beyond that point or resumption of placement at a later date until changes have been made in the supply arrangements to maintain specified rate of placement. These actions should be documented by order records.
	<div id="A construction joint will normally be provided"></div>		<div id="A construction joint will normally be provided"></div>
	{\|style="padding: 0.3em; margin-left:15px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="180px" align="right"		{\|style="padding: 0.3em; margin-left:15px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="180px" align="right"

Smithk: /* 703.2.8 Concrete Placement */

2018-10-25T13:31:47Z

703.2.8 Concrete Placement

← Older revision		Revision as of 08:31, 25 October 2018
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	\|'''[[media:703.2.8 Placing Diaphragm Concrete.pdf\|Placing Diaphragm Concrete]]'''		\|'''[[media:703.2.8 Placing Diaphragm Concrete.pdf\|Placing Diaphragm Concrete]]'''
	\|-		\|-
	\|This ~~PowerPoint~~ explains a MoDOT best practice.		\|This presentation explains a MoDOT best practice.
	\|}		\|}
	A construction joint will normally be provided at the top of the paving notch in the back wall with steel stringers cast into the end bent backwall. The backwall should be poured in accordance with the instruction note given on the plans that concrete diaphragms at the integral end bents shall be poured a minimum of 12 hours before the slab is poured. As will be shown on the plans, the construction joint may or may not conform with the crown of the roadway. If no construction joint is provided, contact the Division of Construction and Materials Office.		A construction joint will normally be provided at the top of the paving notch in the back wall with steel stringers cast into the end bent backwall. The backwall should be poured in accordance with the instruction note given on the plans that concrete diaphragms at the integral end bents shall be poured a minimum of 12 hours before the slab is poured. As will be shown on the plans, the construction joint may or may not conform with the crown of the roadway. If no construction joint is provided, contact the Division of Construction and Materials Office.