Copyright 2015 Dayton Superior Corporation
11/15
SECTION 32 13 13.13 – EXPOSED AGGREGATE CONCRETE PAVING
*** Delete this preamble before printing ***
Copyrighted material; limited license is granted to specifiers and design professionals for use in
connection with public or private construction projects. Use for any other purpose by written consent of
Dayton Superior Corporation only.
This document is intended as a stand-alone specification in CSI 3-Part format ("MasterFormat") or as a
resource for supplementing a broader-scope specification.
Specifier should enable "Hidden Text" feature while editing and disable feature before printing. Hidden
text displays in blue and gives guidance to the specifier ("Editor's Notes").
Bold text in brackets [sample] indicates a choice to be made; refer to editor's notes for guidance.
Metric units are in red font and in parentheses (sample); these may be retained or deleted.
For specification questions, email: Specifications@DaytonSuperior.com
For technical assistance, contact Dayton Superior Technical Services: (866) 329-8724
www.DaytonSuperior.com
*** Delete this preamble before printing ***
PART 1 - GENERAL
1.1
SUMMARY
A.
Section Includes:
1.
2.
1.2
Special finishing materials and techniques, using chemical surface retarders, for
producing decorative exposed aggregate paving finish.
Curing [and sealing] of exposed aggregate surfaces.
RELATED SECTIONS
A.
The following Section(s) contain work related to the work of this Section:
1.
1.3
Section 32 13 13 – Concrete Paving: General requirements for mixing, placing, and
finishing cast-in-place concrete for exposed aggregate finish[, including integral color].
REFERENCES
A.
American Society for Testing and Materials (ASTM)
EXPOSED AGGREGATE CONCRETE PAVING
32 13 13.13 - 1
Copyright 2015 Dayton Superior Corporation
1.
1.1
11/15
ASTM C 1315 - Standard Specification for Liquid Membrane-Forming Compounds
Having Special Properties for Curing and Sealing Concrete.
PREINSTALLATION MEETINGS
A.
Preinstallation Conference: Conduct conference at [Project site] <Insert location>.
B.
Review scope of Work expected. Require representatives of each entity directly concerned with
concrete slab work to attend, including the following:
1.
2.
3.
4.
C.
Review the following, at a minimum:
1.
2.
3.
4.
5.
6.
7.
8.
1.2
Contractor’s superintendent.
Concrete paving subcontractor.
Surface retarder manufacturer's representative.
Architect's and/or Owner's representative (at their option).
Schedule
Extent of Work.
Materials to be applied.
Procedures to be used for achieving exposed aggregate finish.
Mockup panel requirements.
Material storage and staging.
Temporary heating and tenting.
Cleanup and disposal of waste materials.
ACTION SUBMITTALS
A.
General: Submit the following for approval. Do not proceed with work involving any action
submittal until approval is obtained.
B.
Product Data: Technical data sheets for each product used. Include material physical
characteristics, storage and application instructions, precautions and safety data, cleanup, and
maintenance information.
C.
Shop Drawings: Scaled layout drawings of slab areas to receive exposed aggregate finish.
Include location of areas to receive treatment, patterns, effects, and aggregate exposure degree.
D.
Aggregate samples for special aggregate blends.
1.3
INFORMATIONAL SUBMITTALS
A.
General: Submit the following to the Owner for the Owner's information and records. If
acceptable, and unless otherwise indicated, Informational Submittals will not be acted upon or
returned.
B.
Safety Data Sheets (SDS) for all products used.
EXPOSED AGGREGATE CONCRETE PAVING
32 13 13.13 - 2
Copyright 2015 Dayton Superior Corporation
C.
Qualification Data: For Installer.
D.
LEED Submittals:
1.
2.
1.4
11/15
Product Data for Credit IEQ 4.2: For surface retarders and sealers, documentation
including printed statement of VOC content.
SCAQMD VOC Compliance: Contractor to submit documentation that products of this
Section comply with the following:
a.
Flatwork Finish Retarders: Comply with SCAQMD Rule 1113 for VOC
compliance in the “Concrete Surface Retarders” category, not to exceed 250 g/l or
comply with the low solids exception of less than 80 g/l.
b.
Sealers: Comply with SCAQMD Rule 1113 for VOC compliance in the “Sealers”
category, not to exceed 100 g/l.
QUALITY ASSURANCE
A.
Manufacturer Qualifications: Company regularly engaged in the manufacturing of the products
specified in this section, with at least 10 years' successful history manufacturing material
specified herein.
B.
Installer Qualifications: Installer who is approved by, or acceptable to manufacturer for
application of surface retarders required for this Project, with at least five (5) years' experience
in exposed aggregate finishing.
C.
Mock-up Panels: Prepare one mock-up panel for each type and finish of exposed aggregate
finish and aggregate combination at the project site to verify proper aggregate and mix design,
demonstrate proficiency of the Installer, and determine the best procedures and degree(s) of
aggregate exposure. Mock-up panels shall be a minimum of 4’ x 4’. Use methods and materials
proposed for use on the final installation, including special aggregates, if required. The
approved mock-up panel shall serve as a standard of appearance for the final work to be
produced.
1.
2.
3.
1.5
Retain approved mockups during exposed aggregate finishing work to serve as a
reference for aesthetic intent and quality standard during final application.
Approved mock-ups may be incorporated into the Work, if undisturbed.
Demolish and remove mockups at completion of Project.
DELIVERY, STORAGE, AND HANDLING
A.
Deliver products in original factory packaging, bearing identification of product, manufacturer,
batch number, and expiration date.
1.
B.
Furnish Safety Data Sheets to the project superintendent for each product.
Store products in a location protected from damage, construction activity, precipitation and
direct sunlight, in strict accordance with the manufacturer's recommendations.
1.
2.
Do not allow liquid products to freeze.
Use products within published shelf life.
EXPOSED AGGREGATE CONCRETE PAVING
32 13 13.13 - 3
Copyright 2015 Dayton Superior Corporation
C.
1.6
11/15
Handle all products with appropriate precautions and care as stated on the Safety Data Sheet.
PROJECT CONDITIONS
A.
Environmental Limitations: Comply with manufacturer's written instructions for ambient
temperature and humidity, wind, precipitation, and other conditions affecting surface retarder
performance.
1.
Follow hot- and cold-weather concreting procedures [specified in Section 03 30 00 –
Cast-in-Place Concrete] [recommended in ACI 305 and 306].
B.
Use appropriate measures for protection and supplementary heating to ensure proper curing
conditions in accordance with manufacturer's recommendations if application during inclement
weather occurs.
C.
Protect adjacent work from contamination due to mixing, handling, and application of surface
retarders [and] [, curing compounds] [, and sealers].
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
Acceptable Manufacturers:
1.
Dayton Superior Corporation; 1125 Byers Road, Miamisburg, Ohio 45342; Tel: (877)
266-7732; Website: www.DaytonSuperior.com
B.
Requests for substitutions will be considered in accordance with provisions of Section [01 25
00] [01 60 00].
C.
Substitutions: Not permitted.
2.2
MATERIALS
A.
Surface Retarder: Water based top-surface retarder designed to retard the setting (hydration) of
the upper layer of cement paste, producing an exposed-aggregate appearance of the concrete
surface.
1.
Product: Dayton Superior "Top Cast" Surface Retarder, of one or more of the following
Grade(s), as required to achieve intended aesthetic effect:
Product Package Color
Code
03
Violet
EXPOSED AGGREGATE CONCRETE PAVING
Aggregate Size to Expose / Finish
Acid Etch Finish
32 13 13.13 - 4
Copyright 2015 Dayton Superior Corporation
B.
11/15
05
Light Blue
Sandblast Finish
15
Yellow
Up to 1/4" (6.6 mm)
25
Beige
1/8" – 1/4" (3 mm – 6.5 mm)
50
Canary Green
1/8" – 3/8" (3 mm – 9.5 mm)
75
Blue
1/8" – 3/8" (3 mm – 9.5 mm)
100
Gray
3/8" –1/2" (9.5 mm – 13 mm)
125
Pink
3/8" – 5/8" (9.5 mm – 16 mm)
150
Green
3/8" – 5/8" (9.5 mm – 16 mm)
200
Salmon
5/8" – 1" (16 mm – 25 mm)
250
Orange
1" – 1-1/2" (25 mm – 38 mm)
Aggregate: Well-graded, washed gravel and coarse sand as required to achieve intended
aesthetic effect.
1.
2.
Provide special size(s) and/or color(s) of aggregate when required.
Proportion fine and coarse aggregate per manufacturer's recommendations for size of
aggregate to be exposed and to achieve intended aesthetic effect.
C.
Water: Potable and at a temperature of not more than 70 deg F (21 deg C).
D.
Curing/Sealing Compound: Clear, water-based, film-forming curing/sealing compound,
conforming to ASTM C 1315, Type I, Class A.
1.
E.
Product: Dayton Superior "Cure & Seal 1315 EF."
Curing/Sealing Compound: Clear, solvent-based, film-forming curing/sealing compound,
conforming to ASTM C 1315, Type I, Class A.
1.
Product: Dayton Superior "Cure & Seal 25% J22UV."
F.
Curing/Sealing Compound: Refer to Division 32 Section "Concrete Paving."
G.
Surface Sealer: Clear solvent-based methacrylate non-yellowing sealer, designed to darken and
reduce porosity of exposed aggregate concrete surface.
H.
Surface Sealer: Low VOC, water-based clear acrylic, non-yellowing sealer, designed to reduce
porosity of exposed aggregate concrete surface.
1.
Product: Dayton Superior "Ultra Seal EF."
EXPOSED AGGREGATE CONCRETE PAVING
32 13 13.13 - 5
Copyright 2015 Dayton Superior Corporation
I.
11/15
Surface Protectant: Water-based liquid polymer, designed to protect surfaces from overspray of
curing compounds, sealers, and surface retarders.
1.
Product: Dayton Superior "Face-Off."
PART 3 - EXECUTION
3.1
GENERAL
A.
All application requirements herein are general, in nature. Actual techniques and procedures
shall be as required to achieve acceptable visual effects.
1.
Refer to other Division 32 Section(s) for general requirements for forming, reinforcing,
mixing, placing, and finishing concrete pavement work.
B.
Products, techniques, and procedures shall be identical to those used to produce accepted
mockups and shall result in visual effects that match mockups as closely as practicable.
C.
Follow all manufacturer's instructions regarding preparation, mixing, and applying materials.
3.2
EXAMINATION
A.
3.3
Inspect all areas involved in work to establish extent of work, access, and need for protection of
surrounding construction.
SLAB FINISHING
A.
Finish slab surface per manufacturer's recommendations for exposed aggregate finish(es)
indicated, and as required by Division 32 Section "Concrete Paving."
B.
Ensure smooth, flat surface, without low spots ("bird baths") which would allow applied
materials to puddle.
C.
Ensure no ridges or tool marks remain on slab surface.
3.4
PREPARATION
A.
Ensure that air, material, and surface temperature is at least 40 degrees F (5 degrees C) and
rising prior to beginning application.
B.
Protect all surroundings from overspray of liquid materials, including, but not limited to,
adjacent horizontal surfaces, windows, roofs, walkways, drives, and landscaping.
1.
Apply surface protectant and/or plastic sheeting, sufficiently taped in place.
EXPOSED AGGREGATE CONCRETE PAVING
32 13 13.13 - 6
Copyright 2015 Dayton Superior Corporation
3.5
11/15
SURFACE RETARDER APPLICATION
A.
General: Follow all manufacturer's recommendations and written instructions when applying
surface retarder.
B.
Mixing: Mix surface retarder thoroughly prior to each use.
C.
Application:
1.
Begin application while slab is still wet, after the evaporation of all bleed water from the
surface.
2.
Patterns: Where patterns are indicated, provide stencils or masking to areas not to
receive each Grade of surface retarder. Seal edges of masking to prevent seepage of
surface retarder underneath mask.
3.
Apply surface retarder using low pressure sprayer to produce an even, continuous
coating.
a.
Follow manufacturer's recommended coverage rate; do not under-apply.
4.
Comply with manufacturer's recommendations regarding rain protection until material is
dry.
D.
Removal:
1.
2.
3.6
Begin removing retarded cement matrix after dwell time recommended by manufacturer,
adjusted for field conditions. Unless field conditions substantially differ from those
under which acceptable mockup was produced, begin removal after same time period as
was used for mockup.
Remove cement matrix with garden hose or 25 degree nozzle power washer.
a.
Stiff bristle broom or mechanical scrubber may be used as the primary or a
supplementary means of removal.
b.
Take care not to mechanically remove more material than intended by using overly
aggressive methods.
CURING AND SEALING
A.
Curing: Apply curing/sealing compound to slab after water from retarder removal operations
has dissipated.
1.
B.
Coverage: Apply at 200 sq. ft. per gallon.
Sealer: Apply two (2) coats of surface sealer to slab after curing/sealing compound has dried.
1.
2.
3.
Clean surface of dirt, dust, and debris prior to application.
Coverage: Apply at 200 – 300 sq. ft. per gallon (first and second coats).
Coverage:
a.
First Coat: 200 – 300 sq. ft. per gallon.
b.
Second Coat: 400 – 600 sq. ft. per gallon.
EXPOSED AGGREGATE CONCRETE PAVING
32 13 13.13 - 7
Copyright 2015 Dayton Superior Corporation
3.7
11/15
CLEANING
A.
Remove all debris and excess materials from the job site and dispose of in accordance with all
applicable regulations for waste disposal.
END OF SECTION 32 13 13.13
EXPOSED AGGREGATE CONCRETE PAVING
32 13 13.13 - 8