Attachment 3 Specifications 250814.pdf

Allegheny National Forest Construction and Rehabilitation of Stone Bases for Portal Signs

Cast-in-Place Concrete 03 30 00- 1

SECTION 03 30 00

CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes, but is not limited to the following:

1. Concrete slab work for masonry bases.

2. Concrete core of masonry bases.

3. Other incidental concrete that may be required in the contract.

1.2 SUBMITTALS

A. Concrete mix designs for cast-in-place concrete slabs.

B. Field test reports for all concrete pours (temperature, slump, air entrainment, etc.).

C. Laboratory test reports for 28 day compression tests.

D. Plant batch tickets.

E. Mill test reports for all reinforcing steel

F. Aggregate test reports meeting ASTM C 33.

G. Product literature data sheets for all admixtures, curing compounds, bar rests, dowels, fiberboard, etc.

1.3 QUALITY ASSURANCE - TESTING

A. Field testing of mixes shall be performed by an ACI Concrete Field Testing Technician Grade I or

II.

1.4 CODES AND STANDARDS

A. Comply with the following Codes and Standards as applicable:

1. ASTM C 94

2. ACI 301, "Specification for Structural Concrete"

3. ACI 117, "Specifications for Tolerances for Concrete Construction and Materials"

4. ACI 318 “Building code Requirements for Structural Contracts”

5. CRSI's "Manual of Standard Practice"

6. ACI 305 “Hot Weather Concreting”

7. ACI 306.1 “Standard Specification for Cold Weather Concreting”

8. ACI 304R-90 “Guide for measuring, Mixing, Placing and Transporting Concrete”

9. In the ACI publications consider advisory provisions mandatory as though the word “shall” had been substituted for “should” whenever “should” appears.

03 30 00- 2

PART 2 - PRODUCTS

2.1 MATERIALS

A. Ready-mixed concrete: ASTM C 94.

B. Deformed Reinforcing Bars: ASTM A 615/A 615M, Grade 60.

C. Epoxy Coated Reinforcing Bars: ASTM A 775

D. Plain Steel Wire: ASTM A 82, as drawn.

E. Steel Welded-Wire Fabric: ASTM A 185, flat sheets, not rolls.

F. Portland Cement: ASTM C 150, Type I, 1A, III or IIIA.

G. Fly Ash: ASTM C 618, Type C or F.

H. Aggregates: ASTM C 33, uniformly graded.

I. Air-Entraining Admixture: ASTM C 260.

J. Chemical Admixtures: ASTM C 494, water reducing and accelerating.

K. Curing Compound: ASTM C 309, Type 1, Classes A & B, clear when dry

2.2 MIXES

A. Proportion normal-weight concrete mixes to provide the following properties:

1. Minimum Compressive Strength at 28 days: ASTM C 39: 4000 psi

2. Slump Limit: ASTM C 143: 4 inches at point of placement.

3. Air Content: ASTM C 231 (pressure method): 5.5 to 7.0 percent

B. The Contractor shall submit a mix design meeting the requirements specified along with 28 day test break data.

2.3 CONCRETE MIXING

A. Ready-Mixed Concrete: Comply with ASTM C 94 [and ASTM C 1116].

1. When air temperature is between 85 and 90 deg F (30 and 32 deg C), reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F (32 deg C), reduce mixing and delivery time to 60 minutes.

B. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete according to ASTM C 94. Mix concrete materials in appropriate drum-type batch machine mixer.

1. For mixer capacity of 1 cu. yd. (0.76 cu. m) or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

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2. For mixer capacity larger than 1 cu. yd. (0.76 cu. m), increase mixing time by 15 seconds for each additional 1 cu. yd. (0.76 cu. m).

C. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mix type, mix time, quantity, and amount of water added. Record approximate location of final deposit in structure.

PART 3 - EXECUTION

3.1 CONCRETING

A. Construct formwork and maintain tolerances and surface irregularities within ACI 117 limits of Class A for concrete exposed to view and Class C for other concrete surfaces.

B. Accurately position, support and secure reinforcement, threaded anchors and other embedded items.

C. If concrete is delivered and not mixed on site. Do not add water to concrete during delivery, at Project site, or during placement.

D. Place concrete in a continuous operation as much as possible and consolidate using mechanical vibrating equipment. Properly address cold joints and place them at proper locations to minimize future concrete performance issues.

E. Protect concrete from physical damage, premature drying, and reduced strength due to hot or cold weather during mixing, placing, and curing according to ACI specifications.

F. Formed Surface Finish: Smooth-formed finish for concrete exposed to view, coated, or covered by waterproofing or other direct-applied material; rough-formed finish elsewhere.

G. Slab Finishes: Trowel finish.

H. Cure formed surfaces by either moist curing for at least seven days or using concrete curing compound that dries clear. Apply per manufacturer’s requirements.

I. Begin curing concrete immediately after finishing.

J. For on-site pours, Contractor will engage an independent testing Agency to perform concrete temperature, slump, entrained air content and 2 test break tests per pour day and to submit test reports. Both test cylinders to be broken at 28 days.

K. Protect concrete from damage. Repair surface defects in formed concrete and slabs.

3.2 Cold Weather Placing:

A. Protect concrete work from physical damage or reduced strength which could be caused by frost, freezing actions, or low temperatures, in compliance with ACI 306 and as herein specified.

B. When air temperature has fallen to or is expected to fall below 40 F (4 C), uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less 50 (10 C), and not more than 80 F (27 C) at point of placement.

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C. Do not use frozen materials or materials containing ice or snow. Do not place concrete on frozen subgrade or subgrade containing frozen materials.

D. Do not use calcium chloride, salt or other materials containing antifreeze agents or chemical accelerators, unless other wise accepted in mix designs.

3.3 Hot Weather Placing:

A. When hot weather conditions exist that would seriously impair quality and strength of concrete, place concrete in compliance with ACI 305 and as herein specified.

B. Cool ingredients before mixing to maintain concrete temperature at time of placement below 90 F (32 C).

C. Mixing water may be chilled, or chopped ice may be used to control temperature provided water equivalent of ice is calculated to total amount of mixing water.

END OF SECTION

Stone Masonry Veneer 04 43 01- 1

SECTION 04 43 01

STONE MASONRY VENEER

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Stone veneer.

B. Metal anchors and accessories.

C. Setting mortar and pointing mortar.

1.02 SUBMITTALS

A. Samples B. Mock up

1.03 REFERENCE STANDARDS

A. ACI 530.1/ASCE 6/TMS 602 - Specification For Masonry Structures; American Concrete Institute International.

B. ASTM C 270 - Standard Specification for Mortar for Unit Masonry.

C. IMIAWC (CW) - Recommended Practices & Guide Specifications for Cold Weather Masonry

Construction; International Masonry Industry All-Weather Council.

1.04 QUALITY ASSURANCE

A. Installer Qualifications: Installer specializing in performing work of the type required by the section, with documented record of successful installations.

1.05 FIELD CONDITIONS

A. Cold Weather Requirements: Comply with requirements of ACI 530.1/ASCE 6/TMS

602 or applicable building code, whichever is more stringent.

PART 2 – PRODUCTS

2.01 STONE

A. Stone veneer product Cultured Stone by Westlake Royal Stone Solutions; Echo Ridge Dressed Fieldstone or approved equal.

2.02 MORTAR

A. Setting Mortar: ASTM C 270, Type S, using the Proportion Method.

B. Pointing Mortar: Type N using the Property Method in ASTM C 270.

2.03 STONE FABRICATION

A. Stone veneer product Cultured Stone by Westlake Royal Stone Solutions; Echo Ridge Dressed

Stone Masonry Veneer 04 43 01- 2

Fieldstone or approved equal.

PART 3 EXECUTION

3.01 PREPARATION

A. Establish lines, levels, and coursing. Protect from disturbance.

B. Coat back surfaces not to be in contact with setting mortar with back coating material. Allow coating to cure.

3.02 INSTALLATION

A. Size stone units to fit vertical dimensions and perimeter conditions.

B. Arrange stone pattern to provide color uniformity and minimize visual variations and provide a uniform blend of stone unit sizes. Taper to be determined with stone selection.

C. Arrange stone coursing in random running bond with consistent joint width.

D. Set stone in full mortar setting bed to fully support stone over bearing surface. Use setting buttons or shims to maintain correct joint width.

E. Install top flashings of longest practical length and seal watertight to back-up. Lap end joints minimum 6 inches (150 mm) and seal watertight.

3.03 REINFORCEMENT AND ANCHORAGE

A. Install horizontal and vertical seismic reinforcement at 16 inches (400 mm) on center. Up to 4" variation due to rock coursing is acceptable.

B. Attach reinforcement securely to substrate and engage fully in mortar joints.

3.04 JOINTS

A. Leave the following joints open for sealant:

1. Joints between rigidly anchored units, including soffits, panels, and column covers.

2. Joints for expansion. Provide as shown on elevations, or at a minimum, 10' horizontal spacing.

B. Rake out mortar joints 5/8 to 3/4 inch (16 to 19 mm) and brush joints clean to accommodate pointing mortar. Fill joints with pointing mortar.

C. Pack pointing mortar into joints and work into voids. Neatly tool surface to concave joint.

D. At joints to be sealed, clean mortar out of joint before it sets. Brush joints clean.

3.05 CLEANING

A. Remove excess mortar as work progresses, and upon completion of work.

B. Use non-metallic tools in cleaning operations.

C. Remove miscellaneous mortar residue and rinse rock work to a clean and bright condition.

Masonry Restoration and Cleaning 04 50 00 - 1

SECTION 04 50 00

MASONRY RESTORATION AND CLEANING

PART 1 GENERAL

1.1 RELATED DOCUMENTS

A. Drawings, photos and general provisions of Contract, apply to work of this section.

1.2 DESCRIPTION OF WORK

A. Extent of masonry restoration work is indicated on Statement of Work, drawings and photos.

B. Masonry restoration work includes the following:

1. Tuckpointing mortar joints.

2. Stone repair where shown.

3. Stone and brick cleaning all surfaces.

4. Stone and brick sealing all surfaces.

5. Final cleaning

1.3 QUALITY ASSURANCE

A. Restoration Specialist: Work must be performed by a firm having not less than 5 years successful experience in comparable masonry restoration projects and employing personnel skilled in the restoration processes and operations indicated.

B. Repointing: Prepare 2 separate sample areas of approximately 2 feet high by 2 feet wide for each type of repointing required, one for demonstrating methods and quality of workmanship expected in removal of mortar from joints and the other for demonstrating quality of materials and workmanship expected in pointing mortar joints appearance to adjacent existing joints. The intent of the new pointing work is to match cleaned existing mortar. Newly pointed areas shall be consistent with existing adjacent mortar joints for color and texture.

1.4 SUBMITTALS

A. Product Data: Submit manufacturer's technical data for each product indicated including recommendations for their application and use. Include test reports and certifications substantiating that products comply with requirements.

B. Samples: Submit, for verification purposes, samples of the following:

1. Each new exposed masonry mortar to be used for replacing existing materials.

Include in each set of samples the full range of colors and textures to be expected in completed work.

2. Each type of chemical cleaning material data.

3. Each type of chemical clear sealer provide manufacturers data.

4. Stone masonry patching materials product data and application instructions.

04 50 00 - 2

1.5 DELIVERY, STORAGE AND HANDLING

A. Deliver materials to site in manufacturer's original and unopened containers and packaging, bearing labels as to type and names of products and manufacturers.

B. Protect masonry restoration materials during storage and construction from wetting by rain, snow or ground water, and from staining or intermixture with earth or other types of materials.

C. Protect grout, mortar and other materials from deterioration by moisture and temperature.

Store in a dry location or in waterproof containers. Keep containers tightly closed and away from open flames. Protect liquid components from freezing. Comply with manufacturer's recommendations for minimum and maximum temperature requirements for storage.

1.6 PROJECT CONDITIONS

A. Do not repoint mortar joints or repair masonry unless air temperatures are between 40 deg.F (4 deg.C) and 80 deg.F (27 deg.C) and will remain so for at least 48 hours after completion of work.

B. Prevent grout or mortar used in repointing and repair work from staining face of surrounding masonry and other surfaces. Remove immediately grout and mortar in contact with exposed masonry and other surfaces.

C. Protect sills, ledges and projections from mortar droppings.

1.7 SEQUENCING/SCHEDULING

A. Perform masonry restoration work in the following sequence:

1. Chemically clean brick, cut stone and rough cut stone masonry.

2. Rake-out existing mortar from joints indicated to be repointed.

3. Repoint existing mortar joints of masonry indicated to be restored.

4. Chemically seal brick, cut stone and rough cut stone masonry.

PART 2 PRODUCTS

2.1 MASONRY MATERIALS

A. Mortar materials

1. Hydrated Lime: ASTM C 207, Type S.

2. Colored Mortar Aggregate: Natural or manufactured sand selected to produce mortar color to match adjacent existing mortar color.

3. For pointing mortar provide sand with rounded edges.

4. Match size, texture and gradation of existing mortar as closely as possible.

5. Colored Mortar Pigment: Natural and synthetic iron oxides and chromium oxides, compounded for use in mortar mixes. Use only pigments with record of satisfactory performance in masonry mortars.

6. Water: Clean, free of oils, acids, alkalis and organic matter.

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2.2 CLEANING MATERIALS AND EQUIPMENT

A. Limestone/Sandstone Cleaner: Manufacturer's as indicated below for cleaning for cut and rough cut limestone or sandstone.

B. Approved Manufactures

1. Sika Corporation

2. ProSoCo Inc. (Used as standard)

3. Thuro

4. Substitutions: Section 016000 - Product Requirements.

C. Materials: The specified cleaning application is a three- (3) step process requiring all of the following products. ProSoCo Sure Klean products are used as a standard. Equal products for each application by Sika or Thuro are acceptable for cut stone and rough cut rubble stone.

D. For Cut stone and rough cut stone masonry

1. First application, Sure Klean 766 Limestone and Masonry Prewash.

2. Second application, Sure Klean Limestone and Masonry Afterwash.

3. Third Application, Sure Klean Weather Seal Siloxane PD Natural Stone

Treatment.

E. For Brick Masonry

1. ProsoCo Sure Klean Restoration Cleaner

F. For spot problem stains where required

1. Product: Subject to compliance with requirements, provide "Sure Klean Limestone Restorer", ProSoCo, Inc.

G. Water for Cleaning: Clean, potable, free of oils, acids, alkalis, salts, and organic matter.

1. Warm Water: Heat water to temperature of 140 deg.F-180 deg.F (60 deg.C-82 deg.C).

H. Brushes: Fiber bristle only.

I. Spray Equipment: Provide equipment for controlled spray application of water and chemical cleaners, if any, at rates indicated for pressure, measured at spray tip, and for volume.

1. For spray application of chemical cleaners provide low-pressure tank or chemical pump suitable for chemical cleaner indicated, equipped with cone-shaped spray-tip.

2. For spray application of water provide fan-shaped spray-tip which disperses water at angle of not less than 15 degrees.

2.3 STONE REPAIR

A. Stone-to-Stone Adhesive: Two-part polyester resin stone adhesive with a 15-30 minute

04 50 00 - 4 cure at 70 deg.F (21 deg.C), in formulation (knife or flowing grade) recommended by adhesive manufacturer for type of stone repair indicated, and in color indicated or, if not otherwise indicated, as selected by COR from tinted or standard colors available from adhesive manufacturer.

1. Product: Subject to compliance with requirements, provide "Akemi" adhesives distributed by Wood and Stone, Inc., 7567 Gary Road, Manassas, VA 22110.

B. Mortar-to-Stone Adhesive: High modulus, high strength, moisture insensitive epoxy adhesive with a pot life of 30 minutes at 40 deg.F (4 deg.C).

1. Product: Subject to compliance with requirements, provide "Sikadur Hi-Mod Epoxy, Sikastix 370"; Sika Chemical Corporation.

2.4 POINT MORTAR MIXES

A. General:

1. Measurement and Mixing: Measure cementitious and aggregate material in a dry condition by volume or equivalent weight. Do not measure by shovel, use known measure. Mix materials in a clean mechanical batch mixer.

2. Mixing Pointing Mortar: Thoroughly mix cementitious and aggregate materials together before adding any water. Then mix again adding only enough water to produce a damp, unworkable mix, which will retain its form when, pressed into a ball. Maintain mortar in this dampened condition for 1-to-2 hours. Add remaining water in small portions until mortar of desired consistency is reached.

Use mortar within 30 minutes of final mixing; do not retemper or use partially hardened material.

3. Colored Mortar: Produce mortar of color required by use of selected ingredients.

Do not adjust proportions without COR's approval.

2.5 CHEMICAL SEALERS

A. Chemical penetrating sealer is for brick, cut stone and rough cut stone is to be one of the following.

1. ProsoCo Siloxane PD

2. Sika Corporation Silane/ Siloxane water repellant

3. Throro Silane/siloxane water repellant

PART 3 EXECUTION

3.1 MASONRY CLEANING

A. PREPARATION

1. General: Comply with recommendations of manufacturers of chemical cleaners for protecting building surfaces against damage from exposure to their products.

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2. Protect persons, motor vehicles, surrounding surfaces of building whose masonry surfaces are being restored, building site, mask windows and window frames.

3. Prevent chemical cleaning solutions from coming into contact with pedestrians, motor vehicles, landscaping, buildings and other surfaces, which could be injured by such contact.

4. Do not clean masonry during winds of sufficient force to spread cleaning solutions to unprotected surfaces.

5. Dispose of run-off from cleaning operations by legal means and in manner which prevents soil erosion, undermining of paving and foundations, damage to landscaping, and water penetration into building interiors.

6. Erect temporary protection covers over pedestrian walkways and at points of entrance and exit for persons and vehicles, which must remain in operation during course of masonry restoration work.

7. Protect glass and unpainted metal trim from contact with chemical cleaners by covering them with liquid strippable masking agent or polyethylene film and waterproof masking tape. Apply masking agent to comply with manufacturer's recommendations. Do not apply liquid masking agent to painted or porous surfaces.

B. Chemical Cleaner Application Methods:

1. General: Apply chemical cleaners to masonry surfaces to comply with chemical manufacturer's recommendations using brush or spray application methods, at Contractor's option, unless otherwise indicated. Do not allow chemicals to remain on surface for periods longer than that indicated or recommended by manufacturer.

C. CLEANING CUT AND ROUGH CUT RUBBLE STONEWORK

1. Pretest a small area to ensure suitability and desired results. If test areas with concentrated material are cleaned effectively additional tests may be run with dilutions of one part cleaner to three parts water. Greater dilution of 1 part cleaner to 4 or more parts water is desired to avoid staining of adjacent masonry if approved by manufacture and results are achieved. Allow to dry thoroughly before inspection by Owner’s Representative and Architect.

D. CLEANING APPLICATION FOR CUT STONE

1. Sequence of product application

a. Prewet surface

b. Prewash: After tests have determined desirable mix solution apply 766

Prewash with deep-napped synthetic roller or nylon brush. Do not use natural fiber.

c. Allow Prewash to remain on surface for 30 minutes to one hour.

d. Rinse with pressure washer fitted with fan type spray no smaller than 15 degrees.

e. Immediately after rinsing 766 Prewash apply prepared (to desired dilution) Afterwash to wet surface with roller or brush as specified for Prewash.

f. Allow the Afterwash to remain on the surface for three to five minutes.

g. Pressure rinse from the bottom of the treated area to the top. Thoroughly

04 50 00 - 6 rinse all chemicals from coping and down exterior walls.

h. Sealer: Allow cleaned surfaces too completely dry.

i. Apply undiluted Weather Seal Siloxane PD with brush or roller sufficient material to thoroughly saturate the surface. Brush out heavy runs, pools or puddles until they completely penetrate.

E. CLEANING ALLICATION FOR BRICK MASONRY

1. Apply chemical cleaner with low pressure sprayer (100 psi).

2. Allow to remain on brick for 3 to 5 minutes.

3. Scrub tough stains with stiff bristle brush.

4. Rinse with high-pressure washer (500 to 1200 psi).

Note: during the entire applications process the lower masonry areas must be continuously rinsed to avoid rundown staining of adjacent brick and stone masonry.

3.2 STONE REPAIR

A. Carefully remove loose stone fragments in areas which are indicated for repair. Reuse only pieces of spalled stone which are in sound condition.

B. Remove soil, loose stone particles, mortar, and other debris and foreign material from surfaces to be bonded of both fragment and building stone from which it was removed by cleaning with stiff brush.

C. Apply adhesive to comply with adhesive manufacturer's directions. Coat bonding surface of building stone with stone-to-stone adhesive completely filling all voids and covering all surfaces. Fit stone fragments onto building stone while adhesive is still tacky and hold fragment securely in place until adhesive has cured.

D. After adhesive has cured fully, further anchor stone fragments larger than 6"x 6" x 6" in any dimension with 1/4" diameter plain stainless steel rods set into 1/4" diameter holes drilled at a 45 degree downward angle through face of stone. Center and space anchor rods not more than 5" nor less than 3" apart and not less than 2" from any edge. Insert rods not less than 2" into backing stone and 2" into fragment with end countersunk at least 3/4" from exposed face of stone.

E. Clean any residual adhesive from edges. Wet stone and fill any chipped areas and frill holes with patching mortar. Avoid featheredging. Finish patched areas to match texture of, and be level with adjoining surrounding stone surfaces. Keep patching mortar damp for 72 hours.

3.3 STONE PATCHING

A. Remove loose particles, soil, debris, oil and other contaminants from existing stone units at locations indicated by cleaning with stiff brush.

B. Brush coat stone surfaces with mortar-to-stone adhesive to comply with manufacturer's directions.

C. Place patching mortar in layers no thicker than 2". Roughen surface of each layer to provide key for next layer.

04 50 00 - 7

D. Keep each layer damp for 72 hours or until mortar has set.

E. Unacceptable patches are defined as those with hairline cracks or showing separation from stone at edges. Remove patches and refill to provide patches free of those defects.

3.4 REPOINTING EXISTING MASONRY

A. Joint Raking:

1. Rake out mortar from joints to depths equal to 2-1/2 times their widths but not less than 3/4" nor less than that required to expose sound, unweathered mortar.

2. 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.

3. Do not spall edges of masonry units or widen joints. Replace any masonry units, which become damaged.

4. Cut out old mortar by hand with chisel and mallet, unless otherwise indicated.

5. Power operated rotary hand saws and grinders will be permitted but only on specific written approval of COR based on submission by Contractor of a satisfactory quality control program and demonstrated ability of operators to use tools without damage to masonry. Quality control program shall include provisions for supervising performance and preventing damage due to worker fatigue.

B. Joint Pointing:

1. Rinse masonry joint surfaces with water to remove any dust and mortar particles.

Time application of rinsing so that, at time of pointing, excess water has evaporated or run off, and joint surfaces are damp but free of standing water.

2. Apply first layer of pointing mortar to areas where existing mortar was removed to depths greater than surrounding areas. Apply in layers not greater than 3/8" until a uniform depth is formed. Compact each layer thoroughly and allow to become thumbprint-hard before applying next layer.

3. After joints have been filled to a uniform depth, place remaining pointing mortar in 3 layers with each of first and second layers filling approximately 2/5 of joint depth and third layer the remaining 1/5. Fully compact each layer and allow to become thumbprint hard before applying next layer. Where existing bricks have rounded edges recess tool final layer slightly back from face of brick. Take care not to spread mortar over edges onto exposed masonry surfaces, or to featheredge mortar.

4. When mortar is thumbprint hard, tool joints to match original appearance of joints, unless otherwise indicated. Remove excess mortar from edge of joint by brushing.

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5. Cure mortar by maintaining in a damp condition for not less than 72 hours.

6. Where repointing work precedes cleaning of existing masonry allow mortar to harden not less than 30 days before beginning cleaning work.

7. Owner shall have the right to perform periodic tests to verify depth of repointing.

Contractor shall repair with like materials area where mortar has been removed to ascertain depth of repointing.

3.5 FINAL CLEANING

A. After mortar has fully hardened thoroughly clean exposed masonry surfaces of excess mortar and foreign matter using stiff nylon or bristle brushes and clean water, spray applied at low pressure.

B. Use of metal scrapers or brushes will not be permitted.

C. Use of acid or alkali cleaning agents will not be permitted.

3.6 MASONRY SEALING

A. Protection: mask windows and window frames as sealer is being applied.

B. Do not apply sealer in windy when air temperature is above 95 degrees F.

C. Test each surface to be covered. Wet each surface with as a test to determine suitability and results. Wet surfaces without creating drip or rundowns.

D. Apply spray from bottom up creating 4 to 8 inch rundown below the spray contact point.

Brush out heavy runs and drips that do not penetrate.

E. Treated surfaces are dry to touch in one hour and protect from rain for six hours following application.

B. The Contractor shall submit a mix design meeting the requirements specified along with 28 day test break data.

C. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mix type, mix time, quantity, and amount of water added. Record approximate location of final deposit in structure.