07 11 13 BITUMINOUS DAMPPROOFING.doc

SECTION 07 11 13

BITUMINOUS DAMPPROOFING

PART 1 GENERAL

1.1 REFERENCES

1.1.1 The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only. Unless other wise noted, the latest published version and/or revision shall be used.

1.1.1.1 ASTM INTERNATIONAL (ASTM)

a. ASTM C 1187 Asphalt-Base Emulsions for Use as Protective Coatings for Metal

b. ASTM D 1227 Emulsified Asphalt Used as a Protective Coating for Roofing

c. ASTM D 6506 Standard Specification for Asphalt Based Protection for Below Grade Waterproofing

d. ASTM D 41 Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing

e. ASTM D 4263 Indicating Moisture in Concrete by the Plastic Sheet Method

f. ASTM D 4479 Asphalt Roof Coatings - Asbestos-Free

g. ASTM D 449 Asphalt Used in Dampproofing and Waterproofing

1.1.1.2 U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

a. 29 CFR 1926 Safety and Health Regulations for Construction

1.2 SUBMITTALS

1.2.1 Government approval may be required on any of the following items. Items requiring submittals will be listed on the AF Form 66. Provide copies of all submittals per the requirements in Section 01 33 00, Submittal Procedures, or as listed on the AF Form 66:

1.2.1.1 SD-07 Certificates

a. Materials

1.3 DELIVERY AND STORAGE

1.3.1 Deliver materials in sealed containers bearing manufacturer's original labels. Labels shall include date of manufacture, contents of each container, performance standards that apply to the contents and recommended shelf life.

1.4 SAFETY AND HEALTH REQUIREMENTS

1.4.1 If coal-tar pitch materials are used, the Contractor shall conform to all OSHA 29 CFR 1926 and General Industry Health Standards as well as state and local standards.

PART 2 PRODUCTS

2.1 DAMPPROOFING PRODUCTS

2.1.1 Provide Asphalt Primer, Asphalt, Fibrous Asphalt or Emulsion Based Dampproofing as indicated or required. Where damproofing is indicated but not defined by type, use Non-Fribrated Emulsion Based Damproofing over the required Asphalt Primer.

2.2 ASPHALT

2.2.1 ASTM D 449 Type 1 or Type II.

2.3 ASPHALT PRIMER

2.3.1 ASTM D 41

2.4 COAL TAR PITCH

2.4.1 ASTM D 450, Type II or Type III

2.5 FIBROUS ASPHALT

2.5.1 ASTM D 4479, Type I for horizontal surfaces, Type II for vertical surfaces.

2.6 EMULSION BASED ASPHALT DAMPPROOFING

2.6.1 Fibrated Emulsion-Based Asphalt

2.6.1.1 Fibrated emulsion-based asphalt dampproofing shall be cold-applied type conforming to ASTM D 1227 Type IV, asbestos-free, manufactured of refined asphalt, emulsifiers and selected clay, fibrated with mineral fibers. For spray or brush application, emulsion shall contain a minimum of 59 percent solids by weight, 56 percent solids by volume. For trowel application, emulsion shall contain a minimum of 58 percent solids by weight, 55 percent solids by volume.

2.6.2 Non-Fibrated Emulsion-Based Asphalt

2.6.2.1 Non-fibrated emulsion-based asphalt dampproofing shall be cold-applied type conforming to ASTM D 1187 Type II or ASTM D 1227 Type III, manufactured of refined asphalt, emulsifiers and selected clay. Asphalt shall contain a minimum 58 percent solids by weight, 55 percent solids by volume.

2.7 SURFACE PROTECTION

2.7.1 Asphalt Protection Board

2.7.1.1 ASTM D 6506, Type B, fiberglass faced asphalt protection board; 1/8” thick or greater if required by dampproof coating manufacturer.

PART 3 EXECUTION

3.1 SURFACE PREPARATION

3.1.1 Remove or cut form and ties or protrusions that would disrupt the film and repair all surface defects as required in Section 03 30 00.00 20 Cast-In-Pace Concrete. Clean concrete or masonry surfaces to receive dampproofing of foreign matter and loose particles. Apply dampproofing to clean dry surfaces. Moisture test in accordance with ASTM D 4263. If test indicates moisture, allow a minimum of 7 additional days after test completion for curing. If moisture still exists, redo test until substrate is dry.

3.1.1.1 Metal Surfaces

a. Metal surfaces shall be dry and be free of rust, scale, loose paint, oil, grease, dirt, frost and debris.

3.2 PROTECTION OF SURROUNDING AREAS

3.2.1 Before starting the dampproofing work, the surrounding areas and surfaces shall be protected from spillage and migration of dampproofing material onto other work. Any drains and conductors shall be protected from clogging with dampproofing material.

3.3 APPLICATION

3.3.1 Use either hot-application or cold-application method as indicated or required. Prime surfaces to receive fibrous asphaltic dampproofing unless recommended otherwise by dampproofing materials manufacturer. Apply dampproofing after priming coat is dry, but prior to any deterioration of primed surface, and when ambient temperature is above 40 degrees F.

3.3.2 Surface Priming

3.3.2.1 If required by the dampproofing manufacturer, prime surfaces to receive asphaltic dampproofing. Apply primer when ambient temperature is above 40 degrees F, fully covering entire surface to be dampproofed.

3.3.3 Hot-Application Method

3.3.3.1 If chosen as a dampproofing system, apply two mop coats of hot asphalt to surfaces. Apply mop coats uniformly using not less than 20 pounds of asphalt per 100 square feet for each coat. Do not heat asphalt above 450 degrees F. Have kettlemen in attendance at all times during heating to ensure that maximum temperature specified is not exceeded. Apply hot asphalt bitumen and fully bond to primed surface. Provide finished surface that is smooth, lustrous, and impervious to moisture. Recoat dull or porous spots.

3.3.4 Cold-Application Method

3.3.4.1 Emulsion-Based Asphalt

a. If chosen as a dampproofing system, emulsion-based asphalt dampproofing work shall not be performed in temperatures below 40 degrees F. Emulsions shall have a smooth and uniform consistency at time of application. Dampproofing materials shall be applied in accordance with manufacturer's published instructions to produce a smooth uniform dry film of not less than 12 mils thick without voids or defects. Dull or porous spots shall be recoated. Dampproofing materials shall seal tightly around pipes and other items projecting through dampproofing. Rates of application shall be as follows:

(1) Primer: 1/2 gallon per 100 square feet cold-applied, 1/2 gallon per 100 square feet cold-applied.

(2) Fibrated Dampproofing: 2 gallons per 100 square feet, 2 gallons per 100 square feet, cold-applied with spray, brush or trowel.

(3) Non-fibrated Dampproofing: 2 gallons per 100 square feet, 2 gallons per 100 square feet, cold-applied with spray, brush or trowel.

3.3.5 PROTECTIVE COVERING

3.3.5.1 Protect dampproofed surfaces against which backfill will be placed with one layer of fiberglass faced asphalt protection board conforming to the requirements specified herein. Embed boards in the second coating of bitumen tightly butting edges.

END OF SECTION 07 11 13

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QSEU 09-0402

07 11 13-1