Concrete Rehabilitation

:)


Download 35.53 Kb.
Date conversion08.06.2017
Size35.53 Kb.
03 01 00

Concrete Rehabilitation
Part 1 General


    1. Section Summary




  1. This Section includes concrete restoration, structural crack-injection systems, anchoring compounds, crack repair compounds and joint sealant compounds.

  2. It is the specific intent of this Section that at completion of the Work, all Concrete component structures listed in the plan sheet or schedules, shall be completely restored to operability.

  3. The contractor is to be totally familiar with the existing conditions prior to bid.

  4. This specification reflects only the use of products sold by Abatron, Inc. Other concrete restoration products may require additional handling and application procedures. In addition, other products may have physical properties incompatible with this specification.




    1. Related Sections and Documents




  1. Drawings and general provisions of the contract.

  2. Division 00-Procurement and Contracting Requirements

  3. Division 01-General Requirements




    1. Work Included

Provide labor, materials and equipment necessary to complete the work of this section including:



  1. Removal of exterior finish at areas of concrete restoration.

  2. Application of self leveling epoxy concrete.

  3. Application of epoxy concrete paste.
  4. Application of epoxy crack injection systems.


  5. Application of epoxy anchoring compounds.

  6. Application of epoxy crack-repair compounds.

  7. Application of epoxy joint sealants.

  8. Restoration of concrete profile.




    1. References

  1. ASTM International:

1. ASTM C881/C881M Standard Specification for Epoxy-Resin-Base Bonding Systems for

Concrete.

  1. American Concrete Institute (ACI):

1. ACI 503.1 Standard Specification for Bonding Hardened Concrete, Steel, Wood, Brick, and Other Materials to Hardened Concrete with a Multi-Component Epoxy

Adhesive.

2. ACI 503.2 Standard Specification for Bonding Plastic Concrete to Hardened Concrete

with a Multi-Component Epoxy Adhesive.

3. ACI 503.3 Standard Specification for Producing a Skid-Resistant Surface on Concrete by the Use of Epoxy and Aggregate.

4. ACI 503.4 Standard Specification for Repairing Concrete with Epoxy Mortars.



International Organization for Standardization (ISO):


  1. ISO 9001 Quality Systems - Model for Quality Assurance.




    1. Definitions




  1. Induction Period: The time to wait after mixing an epoxy resin and hardener together before applying the mixture so that the reaction is induced.

  2. Pot Life: The time after mixing epoxy resin and hardener in which it remains workable so that it can be applied.
  3. Curing Time: The total reaction time that continues to completion during and after hardening and optimizes most properties.





    1. System Description




  1. Restored concrete shall accept paint and/or sealer.

  2. Where concrete replacement compound has been applied, the material shall form a permanent bond with the existing concrete.




    1. Submittals




  1. General: Supply submittals in accordance with Section 01 33 00.

  2. Product Data: Submit product brochure, technical data, test results and application instructions.

  3. Material Safety Data Sheets (MSDS).

  4. Greenguard Certifications.

  5. Closeout Submittals:

    1. Warranty Documents

    2. Operation and Maintenance Data




    1. Quality Assurance




  1. Qualifications

  1. Applicator: The applicator should demonstrate successful application of products at other locations or training in the use of the product.

  2. Manufacturer experience: The manufacturer shall have not less than 10 years experience in providing products applied and technical support capability.

  3. Manufacturer qualifications: Required products shall be manufactured or supplied by a single manufacturer.

  1. Mock-Up/Test Panel: As required by the Owner and the Architect.



    1. Delivery, Storage and Handling



  1. General: Contractor shall comply with Sections 01 65 00 and 01 66 00 of the General requirements section.


  2. Order: Comply with the manufacturer’s ordering instructions and lead time requirements to avoid construction delays.

  3. Deliver materials to the jobsite in manufacturer’s original, unopened containers.

  4. Storage and Protection:

  1. Store unused materials in tightly sealed containers between 55° and 85° F.

  2. Avoid contamination of component products by introducing any object which has been in contact with another product such as gloves or tools.

  3. Keep flammable solvents away from the products and in a fireproof cabinet or separate location.

  1. Waste Management and Disposal: Unused material shall be disposed of by mixing it according to manufacturer’s instructions, and after hardening, depositing it with other solid waste.




    1. Project /Site Conditions




  1. Project/ Site Environmental Requirements:

  1. Products are to be applied to a dry substrate

  2. Ambient temperature shall be 50° F or higher, unless a supplemental heat source is available or manufacturer approved cold weather hardeners are specified.

  3. Weather should be dry. In the event of rain, work is to be protected from contact with water.




    1. Warranty Period: (__) year commencing on the Date of Substantial Completion.




    1. Manufacturer’s Warranty: The warranty period above is exclusive of manufacturer’s limited warranty and not included in the warranty period.


Part 2 Products

2.1 Manufacturer/Supplier


  1. Abatron, Inc., 5501 95th Ave., Kenosha, WI 53144, E-mail: info at abatron.com Website:

www.abatron.com, Tel: 800/445-1754; Fax: 262/653-2019.
2.2 Materials
A. Proprietary Products/ Systems

1. Epoxy Patching and Resurfacing Compound: Abocrete.

a.Features: Permanently repairs, bond, rebuilds and resurfaces concrete and most rigid surfaces.

a. Tensile Strength: 9,000 psi

b. Flexural Strength: 10,500 psi

c. Compressive Strength: 12,000 psi

d. Components: Epoxy resin, liquid hardener, sand.

e. Ratio by Volume: 4/1.

f. Color: Neutral, Light gray, Dark gray, Buff.

g. Hardening Time: 1 - 6 hours.

h. Finish: Silica sand, grit or other material as selected

i. Cold Weather Hardener: AboCure 7912-1.



  1. Epoxy Adhesive Paste: Aboweld 55-1.

a. Features: No slump, thixotropic.

b. Composition: 100% solids.

c. Ratio by Volume: 1/1.

d. Pot Life: 1 hour.

e. Hardening Time: 1 - 6 hours at room temperature.

f. Color: Gray

g. Cold Weather Hardener: AboCure 55-1 CLD.

3. Fast Hardening Adhesive Patching Paste: AboWeld 8708-2.

a. Features: Fast hardening, no slump.

b. Composition: 100% solids.

c. Ratio by Volume: 1/1.

d. Pot Life: 10 - 15 minutes.

e. Hardening Time: 10 - 20 minutes.

f. Finished Blended Color: Gray.


  1. Bonding Agent Between wet-poured Concrete and Old Concrete: Abocast 8005-6.

  1. Features: Chemical resistant.

  2. Filler: Sand, Gravel, Chips.

  3. Composition: 100% epoxy solids.

  4. Ratio by Volume: 7/3.

  5. Working Life: 30 - 40 minutes.

  6. Hardening Time: 30 minutes - 3 hours.

5. Sealant/Joint Filler: Abocast 8007-2.

a. Features: Heavy-duty; high adhesion. Acid, alkali, fuel resistant; weather and waterproof; wet surface friendly.

b. Characteristics: Heavy duty, high adhesion.

c. Flexibility: Medium; elongation 40%.

d. Composition: 2-part, polysulfide-epoxy; 100% solids.

e. Ratio by Volume: 1/1.

f. Pot Life: 30 - 40 minutes.

g. Hardening Time: 1 - 24 hours(Temperature Dependent).

h. Hardening Temperature: Above 32° F.

i. Thixotropic Cured Hardness: Shore D < 55.

j. Tensile Strength: 1900 psi.

6. Anchoring Compound: BestBond Anchor (BBA)

a. Features: Two-part 9 ounce standard caulking gun cartridge with 16 cubic

inches of material. Permanent adhesion to rigid surfaces, shrink -free, low odor, interior/ exterior application.

c. Hardening Time: 40 minutes

d. Hardness Shore D: 80

e. Pull-out strength: 1,600 psi

f. Tensile strength: 3,700 psi

g. Compressive Strength: 11,000 psi

h. Application Temperature: 50-90°F

7. Crack – Repair Compound: BestBond Crack Repair (BBC)

a. Features: Two-part 9 ounce standard caulking gun cartridge, with 16 cubic

inches of material. Permanent adhesion to rigid surfaces, shrink free, low

odor, for interior/ exterior application for horizontal applications only.

c. Hardening Time: 35 minutes

d. Hardness Shore D: 73

e. Elongation: 30%

f. Tensile strength: 1,270 psi

g. Application Temperature: 50-90°F

8. Joint Sealant Compound: BestBond Joint Sealant (BBJ)

a. Features: Two-part 9 ounce standard caulking gun cartridge. Fills joints and cracks in concrete and surfaces subject to movement. Permanent adhesion for horizontal applications only.

c. Hardening Time: 35 -60 minutes

d. Hardness Shore D: 80

e. Elongation: 25%

f. Application Temperature: 50-90°F

9. Structural Crack Repair: Abojet

a. Tensile Strength: 5000 - 11,000 psi

b. Flexural Strength: 5000 - 13,000 psi

c. Compressive Strength: 8000 - 16,000 psi


Specify:

9.1. AboJet-1: General Purpose for dry and wet surfaces in cans only:

a. Viscosity: Medium, 20 poises.

b. Resin/Hardener Ratio: 2/1.

9.2. AboJet-2 for freezing weather and underwater or wet surfaces in cans only:

a. Viscosity: Low, < 5 poises.

b. Resin/Hardener Ratio: 2/1.

c. Limitations: Toxic, exterior use only.

9.3. Abojet 8610-1 for very thin cracks in cartridges only:

a. Viscosity: Very low, < 2 poises.

b. Resin/Hardener Ratio: 5/1.

9.4. Abojet 8610-2 for thin cracks < 1/4 inch in cartridges only:

a. Viscosity: Low, < 5 poises.

b. Resin/Hardener Ratio: 5/1.

9.5. Abojet 8610-3 for average cracks < 1/2 inch in cartridges only:

a. Viscosity: Medium, < 15 poises.

b. Resin/Hardener Ratio: 5/1.

9.6. Abojet 8702-3 for wider cracks > 1/2 inch in cartridges only:

a. Viscosity: Higher, < 60 poises.

b. Resin/Hardener Ratio: 5/1.




    1. Product Substitutions: No substitutions permitted.


Part 3 Execution
3.1 MANUFACTURER'S INSTRUCTIONS

A. Compliance: Comply with manufacturer's written technical data, including product technical bulletins and product carton installation instructions.

3.2 EXAMINATION

A. Site Verification of Conditions: Verify that substrate conditions, which have either been previously installed under other sections, or that existing site conditions, are acceptable for product installation in accordance with manufacturer's instructions.

3.3 PROTECTION

A. Other Trades: Protect installed work of other trades from staining or contamination.

3.4 PREPARATION

A. Surface Preparation - Concrete Restoration:

1. For products Abocrete, Aboweld 55-1, Aboweld 8708-2, Abocast 8005-6, Abocast 8007-2 and BestBond. Remove oil, grease, wax, and old paint with detergents, solvents or strippers. Sandblast or acid etch concrete surfaces followed by neutralization with a soda ash solution if available. Rinse, dry and vacuum affected area. Deepen and widen thin cracks to allow filling with product.
B. Surface Preparation - Structural Crack Repair:

1. For products Abojet-1, Abojet-2, Abojet 8610-1, Abojet 8610-2,

Abojet 8610-3, Abojet 8702-3 and BestBond . Clean crack with water or compressed air to make crack accessible. Remove oil, grease, wax, and old paint with detergents, solvents or strippers.
C. Mixture - Concrete Restoration:

1. Abocrete: Pour resin and hardener in pail in accordance with manufacturer's recommended ratio. Mix thoroughly and add desired quantity of sand or aggregate. If temperatures are subfreezing, blend in AboCure 7912-1 in ratios as recommended by manufacturer.

2. Aboweld 55-1, Aboweld 8708-2: Mix in equal volumes and according to manufacturer’s instructions.

3. Abocast 8005-6, Abocast 8007-2: Mix thoroughly according to manufacturer’s instruction.


D. Mixture - Structural Crack Repair:

1. Mix resin and hardener in premeasured compartmented cartridge with mixing plunger.

3.5 APPLICATION

A. Primer Coating:

1. For products Abocrete, Aboweld 55-1, Aboweld 8708-2. Prime existing smooth concrete surfaces with Primkote 8006-1.

2. Use primer as a tie coat between epoxy surfaces in accordance with

manufacturer's recommendations.


B. Application - Concrete Restoration:

1. For products Abocrete, Aboweld 55-1, Aboweld 8708-2, Abocast 8005-6 and Abocast 8007-2; apply at temperatures above 55® F. For non-slip surfaces, broadcast sand, grit or aggregate onto surface to cover resin completely before it hardens. Sweep off excess sand after resin hardens. Allow application to harden.


C. Application - Structural Crack Repair:

1. For products Abojet-1, Abojet-2, Abojet 8610-1, Abojet 8610-2, Abojet 8610-3 and Abojet 8702-3 . If access to backside is possible, seal cracked surface along backside of wall with Aboweld 55-1 to contain Abojet injected from front side. Pre-drill holes for insertion of injection ports. Insert injection ports into crack on front side of wall starting from bottom of crack every 8 to 12 inches. Aboweld 55-1 can be used to hold ports in place. Seal crack around ports and between them with Aboweld 55-1 or Aboweld 8708-2. Inject resin through lowest port, until resin starts oozing from port above that. Crimp lowest port shut to prevent resin backflow, and inject resin through next port above. Repeat process until no resin can be injected. After hardening, cut the ports flush to the surface and sand the crack surface to finish.

3.6 FIELD QUALITY CONTROL


  1. Hardened compound should be tack-free and firm to the touch.

  2. Remove hardware in the way of the repair and bag it for later restoration and /or reuse, identifying the component that it came from.

  1. Protect adjacent surfaces from spills with masking tape and plastic sheeting.

  2. Wear protective clothing, eyewear and gloves as noted in manufacturer’s MSDSs.

3.7 Protection



  1. Protect all work from cold temperatures and moisture elements until all epoxy work has

cured.
3.8 TESTING & VERIFICATION

A. Perform tests recommended by manufacturer to verify required performance of products.


3.9 COMPLETION & CLEANUP

A. Upon completion and verification of performance of installation, remove surplus

materials, excess materials, rubbish, tools and equipment.

END OF SECTION


Revision 3/31/2011




:)


The database is protected by copyright ©hestories.info 2017
send message

    Main page

:)