Difference between revisions of "703 - Mortar and Concrete Patching Repair and Resurfacing Mixes"

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Mortar and concrete patching, repair and resurfacing mixtures will be combined in proportions specified for the various types.  Unless otherwise specified, air entrained concrete or mortar will be required.   
 
Mortar and concrete patching, repair and resurfacing mixtures will be combined in proportions specified for the various types.  Unless otherwise specified, air entrained concrete or mortar will be required.   
  
[[#Section 712|Section 712 of the Construction Manual]] details the construction specifics in relation to deck patching and substructure patching utilizing these mixes.   
+
[[712_-_Bridge_Rehabilitation,_Concrete|Section 712 of the Construction Manual]] details the construction specifics in relation to deck patching and substructure patching utilizing these mixes.   
  
 
Slag aggregates are not to be used.
 
Slag aggregates are not to be used.
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! Materials !! Requirements
 
! Materials !! Requirements
 
|-
 
|-
| Portland Cement Type I, Type IA || 901
+
| Portland Cement Type I, Type IA || [http://mdotcf.state.mi.us/public/specbook/files/2012/901%20Cement%20and%20Lime.pdf 901]
 
|-
 
|-
| Silica Fume|| 901
+
| Silica Fume|| [http://mdotcf.state.mi.us/public/specbook/files/2012/901%20Cement%20and%20Lime.pdf 901]
 
|-
 
|-
| Polypropylene Fibers|| 902
+
| Polypropylene Fibers|| [http://mdotcf.state.mi.us/public/specbook/files/2012/902%20Aggregate.pdf 902]
 
|-
 
|-
| Coarse Aggregate 6AA, 6A, 26A|| 902
+
| Coarse Aggregate 6AA, 6A, 26A|| [http://mdotcf.state.mi.us/public/specbook/files/2012/902%20Aggregate.pdf 902]
 
|-
 
|-
| Fine Aggregate, 2NS || 902
+
| Fine Aggregate, 2NS || [http://mdotcf.state.mi.us/public/specbook/files/2012/902%20Aggregate.pdf 902]
 
|-
 
|-
| Latex Emulsion Admixture || 903
+
| Latex Emulsion Admixture || [http://mdotcf.state.mi.us/public/specbook/files/2012/903%20Conc%20Admix%20Curing%20Matl.pdf 903]
 
|-
 
|-
| Water Reducing and Water Reducing-Retarding Admixtures || 903
+
| Water Reducing and Water Reducing-Retarding Admixtures || [http://mdotcf.state.mi.us/public/specbook/files/2012/903%20Conc%20Admix%20Curing%20Matl.pdf 903]
 
|-
 
|-
|  
+
| Air-Entraining Admixtures || [http://mdotcf.state.mi.us/public/specbook/files/2012/903%20Conc%20Admix%20Curing%20Matl.pdf 903]
Air-Entraining Admixtures || 903
 
 
|-
 
|-
| Water || 911
+
| Water || [http://mdotcf.state.mi.us/public/specbook/files/2012/911%20Water.pdf 911]
 
|}
 
|}
  
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Equipment for producing concrete by volumetric batching and continuous mixing will conform to ASTM C 685.  The Contractor will be required to demonstrate that the equipment is properly calibrated for yield and proportions by certification and by field tests.  Equipment use will be permitted provided that a satisfactory product is obtained, as determined by the Engineer.
 
Equipment for producing concrete by volumetric batching and continuous mixing will conform to ASTM C 685.  The Contractor will be required to demonstrate that the equipment is properly calibrated for yield and proportions by certification and by field tests.  Equipment use will be permitted provided that a satisfactory product is obtained, as determined by the Engineer.
  
'''A. Mixing Concrete and Mortar'''
+
{{top}}
 +
 
 +
====[[#Mixing Concrete and Mortar|Mixing Concrete and Mortar]]====
  
 
Concrete and mortar patching mixtures may be mixed and transported by any method described in [http://mdotcf.state.mi.us/public/specbook/files/2012/701%20PCC%20for%20Structures.pdf%20701 section 701 of the Standard Specifications for Construction].  Latex modified concrete (LMC) mixtures will be furnished in continuous mixing equipment.  See section [[712_-_Bridge_Rehabilitation,_Concrete|712 of the Construction Manual]] for information related to the calibration of LMC mixing units.
 
Concrete and mortar patching mixtures may be mixed and transported by any method described in [http://mdotcf.state.mi.us/public/specbook/files/2012/701%20PCC%20for%20Structures.pdf%20701 section 701 of the Standard Specifications for Construction].  Latex modified concrete (LMC) mixtures will be furnished in continuous mixing equipment.  See section [[712_-_Bridge_Rehabilitation,_Concrete|712 of the Construction Manual]] for information related to the calibration of LMC mixing units.
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Mixture proportions for overlay mixtures can be found in [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf table 703-2 in the Standard Specifications for Construction].
 
Mixture proportions for overlay mixtures can be found in [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf table 703-2 in the Standard Specifications for Construction].
  
 +
{{top}}
  
'''A. Structures Patching Mixtures'''
+
====[[#Structures Patching Mixtures|Structures Patching Mixtures]]====
  
 
There are 6 types of structures patching mixtures listed in [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf table 703-1 of the Standard Specifications for Construction].  Mixtures are selected based on depth of the repair and length of curing time available.  The structures patching mixtures include:
 
There are 6 types of structures patching mixtures listed in [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf table 703-1 of the Standard Specifications for Construction].  Mixtures are selected based on depth of the repair and length of curing time available.  The structures patching mixtures include:
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[[File:703_TABLE_3.png |600px|center| 703.04 A ]]
 
[[File:703_TABLE_3.png |600px|center| 703.04 A ]]
  
 +
{{top}}
  
'''B. Overlay Mixtures'''
+
====[[#Overlay Mixtures|Overlay Mixtures]]====
  
 
Overlay mixtures are used for shallow and deep rigid overlays on existing bridge decks.  See section 712 of the Construction Manual for details regarding the construction of rigid overlays.   
 
Overlay mixtures are used for shallow and deep rigid overlays on existing bridge decks.  See section 712 of the Construction Manual for details regarding the construction of rigid overlays.   
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Overlay mixtures include Latex Modified Concrete (LMC), Silica Fume Modified Concrete (SFMC) and Grade D Slag Cement.
 
Overlay mixtures include Latex Modified Concrete (LMC), Silica Fume Modified Concrete (SFMC) and Grade D Slag Cement.
  
1. LMC
+
'''1. LMC'''
  
 
LMC is used for shallow overlays (typically 1.5” – 2”).  The latex and small aggregate gradation enable it to adhere to existing decks with minimal depth of material.  [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf Table 703.02 in the Standard Specifications for Construction] provides the mixture proportions.
 
LMC is used for shallow overlays (typically 1.5” – 2”).  The latex and small aggregate gradation enable it to adhere to existing decks with minimal depth of material.  [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf Table 703.02 in the Standard Specifications for Construction] provides the mixture proportions.
  
2. SFMC
+
'''2. SFMC'''
  
 
SFMC is used for deep overlays (2”-4”).  SFMC provides a dense less permeable concrete to protect the existing deck and reinforcing steel.  SFMC is susceptible to cracking if not wet cured properly or if placed too thick.  [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf Table 703.02 in the Standard Specifications for Construction] provides the mixture proportions.
 
SFMC is used for deep overlays (2”-4”).  SFMC provides a dense less permeable concrete to protect the existing deck and reinforcing steel.  SFMC is susceptible to cracking if not wet cured properly or if placed too thick.  [http://mdotcf.state.mi.us/public/specbook/files/2012/703%20Patch,%20Rep%20Resurf%20Mixes.pdf Table 703.02 in the Standard Specifications for Construction] provides the mixture proportions.
  
3. Grade D Slag Cement
+
'''3. Grade D Slag Cement'''
  
 
Grade D Slag Cement is a mixture intended for rigid overlays indicating an average designed depth of greater than 4”.  Grade D Slag Cement is not as susceptible to cracking as SFMC, however; utilizes a larger aggregate gradation.  The mixture proportion is available via special provision.
 
Grade D Slag Cement is a mixture intended for rigid overlays indicating an average designed depth of greater than 4”.  Grade D Slag Cement is not as susceptible to cracking as SFMC, however; utilizes a larger aggregate gradation.  The mixture proportion is available via special provision.
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[[Category:Construction Manual]]
 
[[Category:Construction Manual]]
 +
[[Category: Division 7]]
 +
[[Category: Section 703]]

Latest revision as of 16:31, 12 May 2021

703
Mortar and Concrete Patching, Repair, and Resurfacing Mixes
2012 STANDARD SPECIFICATIONS FOR CONSTRUCTION - SECTION 703
Section Under Revision

GENERAL

Mortar and concrete patching, repair and resurfacing mixtures will be combined in proportions specified for the various types. Unless otherwise specified, air entrained concrete or mortar will be required.

Section 712 of the Construction Manual details the construction specifics in relation to deck patching and substructure patching utilizing these mixes.

Slag aggregates are not to be used.

[top of page]


MATERIALS

Provide materials in accordance with subsection 703.02 of the Standard Specifications for Construction.

Materials Requirements
Portland Cement Type I, Type IA 901
Silica Fume 901
Polypropylene Fibers 902
Coarse Aggregate 6AA, 6A, 26A 902
Fine Aggregate, 2NS 902
Latex Emulsion Admixture 903
Water Reducing and Water Reducing-Retarding Admixtures 903
Air-Entraining Admixtures 903
Water 911

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Equipment

Equipment for producing concrete by volumetric batching and continuous mixing will conform to ASTM C 685. The Contractor will be required to demonstrate that the equipment is properly calibrated for yield and proportions by certification and by field tests. Equipment use will be permitted provided that a satisfactory product is obtained, as determined by the Engineer.

[top of page]


Mixing Concrete and Mortar

Concrete and mortar patching mixtures may be mixed and transported by any method described in section 701 of the Standard Specifications for Construction. Latex modified concrete (LMC) mixtures will be furnished in continuous mixing equipment. See section 712 of the Construction Manual for information related to the calibration of LMC mixing units.


[top of page]


Mixture Requirements

Mixture proportions for structures patching mixtures can be found in table 703-1 in the Standard Specifications for Construction.

Mixture proportions for overlay mixtures can be found in table 703-2 in the Standard Specifications for Construction.

[top of page]


Structures Patching Mixtures

There are 6 types of structures patching mixtures listed in table 703-1 of the Standard Specifications for Construction. Mixtures are selected based on depth of the repair and length of curing time available. The structures patching mixtures include:


703.04 A

[top of page]


Overlay Mixtures

Overlay mixtures are used for shallow and deep rigid overlays on existing bridge decks. See section 712 of the Construction Manual for details regarding the construction of rigid overlays.

Overlay mixtures include Latex Modified Concrete (LMC), Silica Fume Modified Concrete (SFMC) and Grade D Slag Cement.

1. LMC

LMC is used for shallow overlays (typically 1.5” – 2”). The latex and small aggregate gradation enable it to adhere to existing decks with minimal depth of material. Table 703.02 in the Standard Specifications for Construction provides the mixture proportions.

2. SFMC

SFMC is used for deep overlays (2”-4”). SFMC provides a dense less permeable concrete to protect the existing deck and reinforcing steel. SFMC is susceptible to cracking if not wet cured properly or if placed too thick. Table 703.02 in the Standard Specifications for Construction provides the mixture proportions.

3. Grade D Slag Cement

Grade D Slag Cement is a mixture intended for rigid overlays indicating an average designed depth of greater than 4”. Grade D Slag Cement is not as susceptible to cracking as SFMC, however; utilizes a larger aggregate gradation. The mixture proportion is available via special provision.

703.04 B

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CONSTRUCTION

-Reserved-

[top of page]


MEASUREMENT AND PAYMENT

-Reserved-

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