S02_Attachment 03 (Specifications)_36C24124R0084.pdf

ATTACHMENT 03

Specifications

14 pages

2 February 2024

Providence, Rhode Island VA Health Care System (650)

“Repoint & Repair Buildings at the Harwood Research Center”

Construction

MAINTENANCE OF CONCRETE 03 01 00. Project No. 650-24-106

SECTION 03 01 00

MAINTENANCE OF CONCRETE

PART 1 GENERAL

1.1 SUMMARY

A. Section includes: Furnishing of materials, labor, tools, and equipment necessary to repair and restore deteriorated concrete.

This includes removal, surface preparation and installation of repair materials of deteriorated areas and cracks, and parging all exposed concrete foundation wall faces, as specified herein.

B. Exposed concrete foundation SF areas to be parged:

Research Bldg.

East Face 250 SF South Face 430 SF North Face 200 SF West Face 800 SF

Total 1,680 SF Maintenance Bldg.

East Face 0 South Face 0 North Face 0 West Face 250 SF

Total 250 SF C. Install 250 LF of concrete cracking to be prepped and epoxy filled.

D. Install shoring as directed or as needed to perform the Work.

1.2 COORDINATION

A. Coordinate scheduling, submittals, and Work of various sections of the specifications to ensure efficient and orderly sequence of installation of interdependent construction elements.

B. Coordinate dumpster location, staging and storage requirements with the Owner.

1.3 EXAMINATION

A. Verify that existing site conditions are acceptable to commence

Work. Verify existing dimensions and construction details.

Installation of any products on the surface or substrate shall constitute full acceptance of the condition of the substrate or surface as sound and appropriate to receive the Contractor’s Work.

B. Verify that utility services are available, of the correct characteristics and in the correct location.

1.4 REFERENCES

A. Referenced Codes and Standards: Comply with the most recent publications of the following codes, specifications, and standards.

1. ACI 301-Standard Specification for Structural Concrete.

2. ACI 308-Guide for Consolidation of Concrete.

3. ACI 318-Building Code Requirements for Reinforced

Concrete.

4. ACI 546R-Concrete Repair Guide.

5. ASTM C33-Standard Specification for Concrete Aggregates.

6. ASTM C94-Standard Specification for Ready-Mixed Concrete.

7. ASTM C150-Standard Specification for Portland Cement.

8. ASTM C260-Standard Specification for Air-Entraining

Admixtures for Concrete.

9. ASTM C309-Standard Specification for Liquid Membrane-

Forming Compounds for Curing Concrete.

10. ASTM C469-Standard Test Method for Static Modulus of

Elasticity and Poisson’s Ratio of Concrete in Compression.

11. ASTM C494-Standard Specification for Chemical Admixtures for Concrete.

12. ASTM C881-Standard Specification for Epoxy-Resin-Base

Bonding Systems for Concrete.

13. ASTM C1042-Standard Test Method for Bond Strength of Latex

Systems Used With Concrete.

14. “Guide for Surface Preparation for the Repair of

Deteriorated Concrete Resulting from Reinforcing Steel Corrosion” (Guideline No. 03730) International Concrete Repair Institute. 1995 copyright.

15. “Guide for Selecting Application Methods for Repair of Concrete Surfaces” (Guideline No. 03731) International Concrete Repair Institute. 1996 copyright.

1.5 SUBMITTALS

1.6

A. Include copy of manufacturer’s product installation instruction and data sheet.

B. Approval by Engineer is required before beginning Work affected by submittals.

QUALITY ASSURANCE

A. Comply with Manufacturers’ instructions related to mixing and placing of the materials.

B. Protection of Work: Protect installed work and prohibit traffic or storage upon waterproofed or coated surfaces.

C. DELIVERY, STORAGE and HANDLING products in original unopened containers with the manufacturer’s name, labels, product identification and batch number.

D. Store and condition the specified products as recommended by the manufacturer. Products shall remain unopened until ready for use.

E. Where mixing of components is required, use complete pre-measured units.

PART 2 PRODUCTS

2.1 PATCHING REPAIR MATERIALS

A. Subject to compliance with other requirements in this specification, provide the following materials or equivalent materials approved by engineer that meets the performance requirements stated below.

B. Structural Repair Mortar: Provide single component shrinkage-compensated, silica fume modified, cement-based mortar containing corrosion inhibitor for structural repair of distressed horizontal, vertical, or overhead concrete.

Structural Repair Mortar shall have a minimum modulus of elasticity of 3.80 x 106 psi.

1. Emaco S CI series by Master Builders.

C. Surface Repair Mortar: Provide single component polymer-modified cementitious repair mortar containing corrosion inhibitor for resurfacing of distressed horizontal, vertical or overhead concrete. Surface Repair Mortar shall have a maximum modulus of elasticity of 2.50 x 106 psi.

1. Emaco R CI series by Master Builders.

D. Rapid Hardening and High Early Strength Repair Mortar: Provide a high early strength, single component mortar for applications requiring rapid return to service.

1. Emaco T series by Master Builders.

2. Set 45 series by Master Builders (Requires special application methods).

E. Aggregate: Shall conform to ASTM C 33. Aggregate for incorporation with bagged mortar shall be 3/8 inch, well graded non-reactive and cleaned.

F. Water: Clean and potable.

2.2 RELATED MATERIALS

A. Epoxy Bonding Agent: Provide 100 percent solids, two-component epoxy bonding compound for bonding new concrete to existing surfaces. Epoxy bonding agent shall meet ASTM C 881, Type V, Grade B or C material.

1. Concresive bonding series by Master Builders.

2. Emaco P-22 or Emaco P-24 by Master Builders.

B. Evaporation Retarder: Provide a spray applied monomolecular film that reduces the rate of surface moisture evaporation under hot, dry or windy conditions.

1. Confilm by Master Builders.

C. Liquid Membrane-Forming Curing Compound: Shall conform to ASTM C 309, Type I (minimum 30 percent solids) at a minimum application rate of 200 square feet per gallon.

1. Masterkure 100W by Master Builders.

D. Epoxy Adhesive: Provide a two component 100 percent solids moisture insensitive, low viscosity epoxy resin meeting ASTM C 881-90, Type IV, Grade 1, Class B or C.

1. Concresive series by Master Builders.

E. Surface Seal: The surface seal material for epoxy injection is that material used to confine the injection adhesive in the fissure during injection. This material shall have sufficient strength to resist injection pressures to prevent leakage during injection.

PART 3 EXECUTION - CRACK AND VOID REPAIR AND PARGING

3.1 SURFACE PREPARATION

A. All repair areas shall be prepared in accordance with

International Concrete Repair Institute’s “Guide Specifications for Structural Concrete Repairs”, “Guide Specifications for Epoxy Injection”, and Guide Specifications for Cementitious Bonded Overlay”.

B. Repair crack as specified below.

C. Apply bonding agent to entire concrete surface, to grade.

3.2 MIXING

A. Mechanical mixing is recommended with the use of a slow speed drill and a jiffler type paddle, or in an appropriate mortar mixer. Typical mixing time is 3-5 minutes. Do not add more water than is recommended by the manufacturer. Do not mix longer than 5 minutes.

B. Only that portion of material that can be properly mixed within 10 minutes of application should be mixed.

3.3 APPLICATION

A. Apply fresh mortar to the bond coat. Place repair mortar according to manufacturer’s recommendations.

B. Evaporation Retarder: Where rapid surface evaporation may occur, in hot, windy conditions, apply specified evaporation retarder according to manufacturer’s recommendations.

C. Finishing: Completed repair surfaces should be straight, true and match existing profiles and surface texture. Do not overwork the surface.

D. After application is completed and repair material has sufficiently set so resounding will not damage it, resound patched area to insure proper bonding of the repair material.

E. Parging - Apply to clean, sound, prepped concrete. Thoroughly saturate the area to be parged and remove any free-standing water. After mixing apply parging mix, by trowel, to a damp surface not exceeding 10 mm (3/8 inch) in thickness. If a greater thickness is required, rough-up surface with a coarse broom and allow to harden for 24 hours before repeating process.

3.4 CURING

A. All repaired surfaces must be cured for a minimum of 5 days with one of the following methods.

1. Wet cure with burleen or wet burlap.

2. Ponding.

3. Sheeting material.

4. Liquid membrane-forming curing compound. Apply per manufacturer’s recommendations.

B. Protect cured areas from storage and traffic during curing period.

3.5 CRACK REPAIR

A. Epoxy Injection

1. Preparation: Prepare the area and cracks to be injected in the following manner.

(a) Surfaces adjacent to cracks or other areas of application shall be cleaned of dirt, dust, oil, and grease or other foreign matter which may be detrimental to bond of injection surface seal.

(b) Entry ports shall be provided along the crack at intervals of not less than the thickness of concrete at that location.

(c) Surface seal material shall be applied to the face of the crack between the entry ports. Allow surface seal material to gain strength prior to injection.

2. Equipment for Injection: Provide injection equipment that is portable, positive displacement type pump. The pump shall be electric, or air powered and shall provide in-line metering and mixing. Equipment shall have the capability of maintaining the volume ratio for the epoxy adhesive within a tolerance of +/- 5 percent by volume at any discharge pressure up to 160 psi.

3. Injection: Shall begin at the lowest entry port and continue until there is an appearance of epoxy adhesive at the next port adjacent to the entry port being pumped.

The epoxy injection shall be transferred to the next adjacent port where the adhesive has appeared. Injection shall be performed until cracks are completely filled.

Cracks are to be filled to 6” below grade.

4. Finishing: When cracks are completely filled, epoxy adhesive shall be cured for sufficient time to allow removal of surface seal without any draining or run-back of epoxy adhesive material. Surface seal material and any adhesive runs shall be removed from concrete surfaces.

The face of the crack shall be finished flush with concrete, showing no indentations or protrusions caused by placement of entry ports.

5. Filling Cored Holes: After the Work has been accepted by the Architect, cored holes shall be repaired using a two component-bonding agent and a suitable repair mortar. The bonding agent shall be applied to the surfaces of the cored holes, followed by application of repair mortar placed by hand trowel, thoroughly rodded and tamped in place, and finished to match color, finish, and texture of existing concrete.

3.6 CLEANING

A. General: Keep area clean during repair operation, remove and clean promptly, mortar, or epoxy spills with appropriate tools and solvents without damaging concrete. Collect and maintain site in a clean and orderly condition. Remove debris daily from site.

B. Final Cleaning: Remove all mortar splatters, epoxy spills from the repair area and adjacent structures acceptable to the Engineer.

END OF SECTION

02-01-16

MAINTENANCE OF MASONRY 04 01 00 - 1 Project No. 650-24-106

SECTION 04 01 00

MAINTENANCE OF MASONRY

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Repointing existing masonry joints.

2. Replacing existing damaged masonry units.

1.2 RELATED REQUIREMENTS

A. N/A.

1.3 APPLICABLE PUBLICATIONS

A. Comply with references to extent specified in this section.

B. ASTM International (ASTM):

1. C144-11 - Aggregate for Masonry Mortar.

2. C150/C150M-15 - Portland Cement.

3. C207-06(2011) - Hydrated Lime for Masonry Purposes.

4. C270-14a - Mortar for Unit Masonry.

5. C295/C295M-12 - Petrographic Examination of Aggregates for Concrete.

1.4 SUBMITTALS

A. Submittal Procedures: Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B. Manufacturer's Literature and Data:

1. Description of each product.

2. Replacement units indicating manufacturer recommendation for each application.

C. Samples:

1. Pointing Mortar: Molded, 150 mm (6 inches) long for each type, texture, and color.

2. Face Brick: Provide (4) different samples for new face brick. If it is determined at time of submittal that a blend is required, supply (4) blend samples.

D. Test reports:

1. Preconstruction test results of existing masonry mortar and units.

2. Recommended mortar mix and mortar materials sources.

MAINTENANCE OF MASONRY 04 01 00 - 2 Project No. 650-24-106

1.5 QUALITY ASSURANCE

A. Installer Qualifications:

1. Documented experience in completion of work, similar in design, material, and extent specified.

B. Preconstruction Testing:

1. Existing Mortar: according to ASTM C295/C295M.

a. Recommend mortar mix compatible with existing and mortar material sources required to match existing texture.

2. Mortar:

a. Test for compressive strength and water retention according to ASTM C270/C270M.

b. Minimum Mortar compressive strengths 28 days:

1) Type S: 12.4 MPa (1,800 psi).

2) Type N: 5.1 MPa (750 psi).

3. Non-Staining Cement: Test for water soluble alkali.

a. Water Soluble Alkali: Maximum 0.03 percent.

4. Sand: Test for deleterious substances, organic impurities, soundness, and grading.

C. Mockups: Prepare mockups of restoration and cleaning as follows to demonstrate aesthetic effects and qualities of materials and execution. Prepare mockups on existing walls under same weather conditions to be expected during remainder of the Work.

1. Locate mockups on the building, where directed by Architect.

2. Clean an area approximately 25-sq. ft.

a. Test cleaners and methods on samples of adjacent materials for possible adverse reactions, unless cleaners and methods are known to have a deleterious effect.

b. Allow a waiting period of not less than 7 days after completion of sample cleaning to permit a study of sample panels for

E. Under hot conditions, as directed by Manufacturer, moisten repaired areas, cover, and cure in accordance with manufacturer's directions. Keep patches moist and out of direct sun for at least the first day. negative reactions.

3. Rake out joints in cleaned area for test repointing.

4. Remove 3 damaged bricks, where directed by architect (will not necessarily be in same area as test repointing and replace using

MAINTENANCE OF MASONRY 04 01 00 - 3 Project No. 650-24-106 approved mortar with samples of new brick selected for repair. Tool joint to match existing.

5. Notify Owner and Architect 7 days in advance of the dates and times when samples will be prepared.

6. Obtain Architect's approval of mockups before starting the remainder of clay masonry restoration and cleaning.

1.6 DELIVERY

A. Deliver products in manufacturer's original sealed packaging.

B. Mark packaging, legibly. Indicate manufacturer's name or brand, type, production run number, and manufacture date.

C. Before installation, return or dispose of products within distorted, damaged, or opened packaging.

1.7 STORAGE AND HANDLING

A. Store materials covered, protected from weather, and elevated above grade.

1. Prevent contamination of aggregates.

B. Protect products from damage during handling and construction operations.

1.8 FIELD CONDITIONS

A. Environment:

1. Cold Weather Requirements: Maintain mortar ingredients and substrate within temperature range between 4 degrees C (40 degrees F) and

49 degrees C (120 degrees F) when outside temperature is less than 4 degrees C (40 degrees F).

2. Hot Weather Requirements: Protect mortar-joint from evaporation of moisture from mortar material. When required, provide adequately shaded work area.

1.9 WARRANTY

A. Construction Warranty: FAR clause 52.246-21, "Warranty of

Construction."

PART 2 - PRODUCTS

2.1 MATERIALS

A. Mortar Components:

1. Hydrated Lime: ASTM C207, Type S.

2. Aggregate: ASTM C144.

MAINTENANCE OF MASONRY 04 01 00 - 4 Project No. 650-24-106

3. Portland Cement: ASTM C150/C150M, Type I.

4. Water: Potable, free of substances that are detrimental to grout, masonry, and metal.

2.2 PRODUCTS - GENERAL

A. Provide each product from one manufacturer and from one production run.

2.3 REPLACEMENT MASONRY UNITS

A. Face Brick:

1. ASTM C216, Grade SW, Type FBS matching existing.

2. Efflorescence: Rated slight efflorescent when tested according to

ASTM C67.

B. Salvaged Bricks: Salvaged brick is preferred over replacement brick.

New brick will be acceptable if approved with test brick replacement.

2.4 MIXES

A. Mortar Analysis: A mortar analysis shall be performed by the

Contractor. Provide repointing mortar for brick joints that conform to the requirements of this report.

B. Masonry Mortar: ASTM C270/C270M.

1. Admixtures:

a. Do not use mortar admixtures, and color admixtures unless approved by Contracting Officer's Representative.

b. Do not use antifreeze compounds.

2.5 ACCESSORIES

A. Cleaning Agent: Soapless, non-acidic, detergent, specially prepared for cleaning brick masonry.

PART 3 - EXECUTION

3.1 PREPARATION

A. Examine and verify substrate suitability for product installation.

B. Protect persons, motor vehicles, surrounding surfaces of building being restored, completed work, building site, and surrounding buildings from harm resulting from masonry restoration work.

1. Protect from mortar droppings and cleaning operations.

C. Remove existing fixtures and fittings, including but not limited to radon exhaust system, concealing masonry joints to permit repointing and repair.

MAINTENANCE OF MASONRY 04 01 00 - 5 Project No. 650-24-106

3.2 MIXING

A. Measure ingredients by volume using known capacity container.

B. Mix for 3 to 5 minutes in a mechanically operated mortar mixer.

C. Mix water with dry ingredients in sufficient amount to provide a workable mixture which will adhere to vertical surfaces of masonry units.

D. Mortar Stiffened Because of Water Loss Through Evaporation:

1. Re-temper by adding water to restore to proper consistency and workability.

2. Discard mortar reaching initial set or unused within two hours of mixing.

3.3 MORTARING

A. Type N Mortar: Use for masonry work.

3.4 EXISTING MORTAR JOINTS

A. Cut out existing bed and head mortar joints, to uniform depth of 19 mm

(3/4 inches), or to sound mortar without damaging edges and faces of existing masonry units to remain.

B. Remove mortar from masonry surfaces within raked-out joints to provide reveals with square backs and to expose masonry for contact with pointing mortar. Brush, vacuum, or flush joints to remove dirt and loose debris.

1. Do not rinse when temperature is below freezing.

2. Do not spall edges of masonry units or widen joints. Replace masonry units which become damaged while removing old mortar at no additional cost to the Owner.

3.5 TUCK POINTING

A. Dampen joints immediately before tuck pointing. Allow masonry units to absorb surface water.

B. Tightly pack tuck pointing mortar into joints in thin layers, 6 mm

(1/4 inch) thick, maximum.

C. Allow layer to become slightly hardened before applying next layer.

D. Pack final layer flush with surfaces of masonry units.

3.6 MASONRY UNIT REPLACEMENT

A. Cut out mortar joints surrounding masonry units requiring replacement.

1. Remove existing masonry units creating opening for replacement masonry unit installation.

2. Remove mortar, dust, and debris from opening perimeter surfaces.

MAINTENANCE OF MASONRY 04 01 00 - 6 Project No. 650-24-106

3. Prevent debris from falling into cavity.

B. Dampen surfaces of surrounding existing masonry before installing replacement masonry units.

1. Allow existing masonry to absorb surface moisture before installing replacement units.

2. Butter contact surfaces of existing masonry and replacement masonry units with mortar.

3. Center replacement masonry units in opening and press into position.

4. Remove excess mortar.

5. Tuck point replacement masonry units to ensure full head and bed joints.

3.7 JOINT TOOLING

A. Tool repointed joints when mortar becomes slightly hardened.

B. Produce smooth, compacted, joint matching existing.

C. Under hot conditions, as directed by Manufacturer, moisten repaired areas, cover and cure in accordance with Manufacturer’s directions.

Keep patches moist and out of direct sun for at least the first day.

3.8 JOINT SEALING

A. Provide sealants as follows:

1. Vertical surfaces, provide non-staining ASTM C920, Type M, Grade NS, Class 25.

2. Horizontal surfaces, provide ASTM C920, Type S or M, Grade P, Class 25, Use T.

B. Provide location(s) of exterior sealant as follows:

1. Joints formed where frames and subsills of windows, doors, louvers, and vents adjoin masonry, concrete, or metal frames. Provide sealant at exterior surfaces of exterior wall penetrations.

2. Metal to metal.

3. Masonry to masonry.

4. Masonry joints where shelf angles occur.

5. Voids where items penetrate exterior walls.

6. Metal reglets, where flashing is inserted into masonry joints, and where flashing is penetrated by coping dowels.

C. Provide installation as follows:

1. Apply sealants and caulking only when ambient temperature is between

2. 5 degrees C and 38 degrees C (40 degrees and 100 degrees F).

3. Do not install sealant type listed by manufacture as not suitable

MAINTENANCE OF MASONRY 04 01 00 - 7 Project No. 650-24-106 for use in locations specified.

4. Apply caulking and sealing compound in accordance with manufacturer's printed instructions.

5. Tool exposed joints to form smooth and uniform beds, with slightly concave surface.

6. Remove masking tape immediately after tooling of sealant and before sealant face starts to “skin” over. Remove any excess sealant from adjacent surfaces of joint, leaving the working in a clean finished condition.

7. Apply compounds with nozzle size to fit joint width.

8. Test sealants for compatibility with each other and substrate. Use only compatible sealant. Submit test reports.

9. Replace sealant which is damaged during construction process.

D. COLOR:

1. Sealants used with exposed masonry are to match color of mortar joints.

2. Sealants used with unpainted concrete are to match color of adjacent concrete.

E. JOINT SEALANT BACKING:

1. Provide sealant backings of material and type that are nonstaining;

are compatible with joint substrates, sealants, primers, and other joint fillers; and are approved for applications indicated by sealant manufacturer based on field experience and laboratory testing.

3.9 CLEANING

A. Remove mortar splatter from exposed surfaces immediately.

B. Clean exposed masonry surfaces on completion.

C. Remove mortar droppings and other foreign substances from wall surfaces.

D. Wet surfaces with clean water.

E. Wash with cleaning agent.

F. Brush masonry surfaces with stiff fiber brushes while washing.

1. Do not use metal scrapers or brushes.

2. Do not use acidic or alkaline cleaners.

G. Immediately after washing, rinse with clean water.

1. Remove traces of detergent, foreign streaks or stains.

MAINTENANCE OF MASONRY 04 01 00 - 8 Project No. 650-24-106

3.10 WATER REPELLENTS

A. Limitations: Proceed with application only when the following existing and forecasted weather and substrate conditions permit water repellents to be applied according to manufacturer’s written instructions and warranty requirements:

1. Mortar have cured for not less than 28 days.

2. Ambient temperature is above 40 deg F and below 100 deg F and will remain so for 24 hours.

3. Substrate is not frozen and substrate-surface temperature is above

40 deg F and below 100 deg F.

4. Rain or snow is not predicted within 24 hours.

5. Not less than 24 hours have passed since surfaces were last wet.

6. Windy conditions do not exist that might cause water repellent to be blown onto vegetation or surfaces not intended to be treated.

B. Siloxane, Penetrating Water Repellent: Clear, containing 10 percent or more solids of oligomerous alkylalkoxysiloxanes; with alcohol, ethanol, mineral spirits, water, or other proprietary solvent carrier; and with

400 g/L or less of VOCs.

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following or approved equal:

a. Chemprobe (Tnemec); Prime A Pell H2O Series 633.

b. Conproco Corporation; Conpro Shield W.

c. Dayton Superior; Weather Worker™ 10% J26WB.

d. Diedrich Technologies, Inc.; 303-S.

e. Euclid Chemical Company (The); Baracade WB-244.

f. H&C Concrete Care Products, Sherwin-Williams Company (The):

HB-100.

C. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect the substrate before application of water repellent and to instruct Applicator on the product and application method to be used.

D. Apply coating of water repellent on surfaces to be treated using 15 psi-pressure spray with a fan-type spray nozzle, roller, or brush to the point of saturation. Apply coating in dual passes of uniform, overlapping strokes. Remove excess material; do not allow material to puddle beyond saturation. Comply with manufacturer's written instructions for application procedure unless otherwise indicated.

MAINTENANCE OF MASONRY 04 01 00 - 9 Project No. 650-24-106

E. Apply a second saturation coating, repeating first application. Comply with manufacturer's written instructions for limitations on drying time between coats and after rainstorm wetting of surfaces between coats.

Consult manufacturer's technical representative if written instructions are not applicable to Project conditions.

F. Immediately clean water repellent from adjoining surfaces and surfaces soiled or damaged by water-repellent application as work progresses.

Correct damage to work of other trades caused by water-repellent application, as approved by Architect.

G. Comply with manufacturer's written cleaning instructions.

a. Co, Inc.; Siloxane WB Concentrate.

- - E N D - -

4. Sand: Test for deleterious substances, organic impurities, soundness, and grading.

B. Protect products from damage during handling and construction operations.

B. Salvaged Bricks: Salvaged brick is preferred over replacement brick. New brick will be acceptable if approved with test brick replacement.

C. Remove existing fixtures and fittings, including but not limited to radon exhaust system, concealing masonry joints to permit repointing and repair.