This is our first product to be developed at U.S. Concrete\'s R&D facility. Excess moisture in a concrete slab is a leading cause of flooring problems. Preventing moisture problems in situations where moisture-sensitive floor coverings will be applied is critical. Aridus Rapid Drying Concrete eliminates a major source of moisture-related flooring problems and increases the likelihood that installations will proceed on schedule — without the need for costly topical moisture mitigation treatments.

1. Aridus®
Rapid Drying Concrete
Your Solution to Moisture-Related Flooring Problems
1
© 2012 U.S. Concrete, Inc. All rights reserved. Aridus and the Aridus logo are registered trademarks of U.S. Concrete, Inc.

2. The Problem: Floors Gone Bad
The effects of vapor emissions and high moisture condition
in concrete leads to higher pH that causes:
Adhesive breakdown, de-bonding and blistering
Adding hundreds of millions of dollars in repair costs
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3. Impacts on Project and Owner
 Costly flooring damage, repairs, replacements and
moisture mitigation treatments
 Construction delays and cost overruns
 Concrete moisture levels not meeting flooring
manufacturer's warranty standards
 Mold/mildew damage and air quality concerns
 Liabilities associated with flooring failures
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4. Contractors Face These Risks
When Field Tests Fail or Post-installation Moisture Erupts
Liability
Issues
Environmental
Hazards
Cost Overruns
Damaged
Unplanned
Reputation
Delays
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5. But I thought solutions existed to
solve high moisture levels…
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6. Current Options to a “Dry Floor”
Reactive Silicates Integral Admixtures Hybrid Epoxy
 Ex: Creteseal, Concure  Ex: Barrier1, Xypex, Moxie  Ex: Koster, Ardex
 What: Surface reaction  What: Pore blockers  What: Epoxy coating
 Spray on treatment designed  Integral admixture put into  Multi-component system that
to penetrate concrete surface concrete at plant often involves a primer and a
& react chemically with liquid applied epoxy coating
concrete  Goal: React to block pores of
concrete internally  Goal: Reduce MVER and act
 Goal: Reduce Moisture Vapor as isolation barrier to alkaline
Emissions Rate (MVER) and salts, within concrete from
bind up soluble alkali results reaching adhesive
in high pH levels
Reality: Reality: Reality:
 Only effective when properly
 Moisture vapor will eventually  Effective at stopping liquid  installed, but…when properly
Only effective
come through water but not moisture vapor installed, but…
 Very costly
 Can not be used with high SCMs  Can not be used with high  Very costly
SCMs
Bottom Line: Each option attempts to seal the concrete but none get rid of
the problem within the concrete. None addresses RH.
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7. Your Choices
Aridus® Concrete
201
Use a
201
2
3
 A scientifically
product that engineered rapid
attempts to Wait for concrete
seal the to dry...
drying concrete that
moisture OR consumes excess
Months... Choose water
Years…  Reaches moisture
levels required by
flooring manufacturers
and reduces
scheduling delays
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8. Aridus® Concrete: An Inside Look
Conventional Concrete: Dries slowly from the top down
Drying to this depth could take years
Aridus® Rapid Drying Concrete: Dries throughout the depth
Drying throughout the depth will take
roughly 45 days
The Aridus® Rapid Drying Concrete is the result of more than 6 years of development, laboratory testing and field
verification by U.S. Concrete’s National R&D Lab, USC Technologies
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9. The Aridus® Advantage  It’s Concrete
• Engineered mix guaranteed to quickly consume moisture
1 Eliminates moisture issues
• Safe for flooring in as little as 28 days
• No delays due to extended drying time
• No need for moisture mitigation system. Result: no time associated with:
Eliminates costly and time • Applying multiple surface coatings
2 consuming moisture mitigation • Curing a surface MMS
systems (MMS) or extended • Closing down work area to apply MMS
drying time • Surface prep sandblasting
• Grinding edges due to curling
• Post installation corrections
Eliminates moisture related
3 • No mold/mildew or air quality issues
environmental hazards
• Quicker drying
• High, early strength development offers potential schedule savings => accelerated
construction schedule
4 Superior performance over
conventional concrete
• Superior compressive strength
• Improved drying shrinkage properties
• Very low permeability
• Significantly reduced curling
• Moisture is gone when its time to install floor
5 Your “Insurance Policy”
• Ten year warranty is available
• Six years of development, laboratory testing and field verification by U.S.
Concrete, Central’s parent company
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10. Opportunities
 Resilient/Resinous Flooring
 9600 Section
. . .
. . .
Wet Climates Dry Climates Slabs close to
water table
i
Hospitals Schools Data Centers Retail Commercial Residential
Bio-Tech Technology Centers Office
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11. Project Profile: Customer #1
N. CA High Tech Manufacturing Center
Contractor: XL Construction, Subcontractor: Jos. J. Albanese
Highlights:
 Project 1: Placed 1200 cu. yds.; Slab depth 5”-12”
 Project 2: Placed 300 cu. yds..; Slab depth 12”
 Due to the high early strength of Aridus® concrete, steel was erected 1½ days after the concrete
was poured
 Aridus concrete saved time during finishing operations – interior work did not have to stop to
apply a topical moisture barrier
 Manufacturer’s MVER & RH moisture requirements were met on-time, allowing flooring
installation to proceed as scheduled
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12. Project Profile: Customer #1
N. CA High Tech Manufacturing Center
6.0 95
Lab
WD 4.19.2010
MVER (lbs / 1000 ft / 24 hr)
5.5 Field
90 Lab
WD 04.19.2010 WD Field
Relative Humidity (%)
Field Results
WD Field Results
5.0
85
4.5
4.0 80
3.5
75
3.0
70
2.5
2.0 65
0 7 14 21 28 35 42 0 7 14 21 28 35 42
Age (Days) Age (days)
Field results closely tracked lab results
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13. Project Profile: Customer #2
N. CA Data Center
6.0 100
5.5 Aridus Aridus
MVER (lbs / 1000 ft / 24 hr)
95
Relative Humidity (%)
5.0
90
4.5
85
4.0
80
3.5
75
3.0
2.5 70
2.0 65
8 11 16 11 12 18 22 28 33
Age After Rain Event (Days) Age After Rain Event (Days)
Age (days)
Age (Days)
Contractors: Turner/Conco
Highlights:
 Placed 24 cu. yds.; Slab depth: 6”
 Aridus® Concrete met the moisture targets at two weeks, even after multiple rain events
 Aridus Concrete was finished to a superflat surface
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14. Project Profile: Customer #3
N. CA High Tech Center
Contractor: XL Construction
Highlights:
 Placed 41 cu. yds.; Slab depths: 4”- 8”
 Aridus® concrete slab was ready for epoxy within 2 weeks
 Several placements made; each performed to specifications
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15. Project Profiles
View Video
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16. How Can We Help You?
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17. Aridus®
Rapid Drying Concrete
For more information contact:
David Perry
Vice President, Sales & Marketing
Central Concrete Supply Co.
www.centralconcrete.com
Mobile: 925-998-5169
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18. ADDITIONAL RESOURCES
Testing Data
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19. Independent Validation Testing:
Pre-product Release
Simpson Gumpertz & Heger (SGH)
Pre-product Release Testing
 National consulting firm
 Leading experts in concrete ASTM F1869 – Moisture Vapor Emissions Rate
moisture analysis
ASTM F2170 – Internal Relative Humidity
Highlights:
ASTM C31 – Compressive Strength
 Witnessed batching
ASTM C157 – SEAONC Method – Drying Shrinkage
 Witnessed placing of concrete
 Installed moisture testing equipment
 Real-time monitoring
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20. Independent Validation:
Placement Review
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21. Independent Validation: Testing
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22. Independent Validation Testing: MVER & Internal RH
Tests Conducted
 ASTM F1869 MVER Burnished Finish Steel Trowel Finish
Moisture Vapor Emission Rate 3 Day Plastic Cure 3 Day Plastic Cure
Control Aridus Control Aridus
 ASTM F2170 RH
Internal Relative Humidity MVER = 8.8 MVER = 3.7 MVER = 9.1 MVER = 4.1
RH = 93% RH = 75% RH = 94% RH = 75%
Background:
 Control: Commonly used mixture
for a slab-on-grade placement Burnished Finish Steel Trowel Finish
(w/c = 0.41) 7 Day Plastic Cure 7 Day Plastic Cure
 Data taken at 30 days Control Aridus Control Aridus
Highlights: MVER = 9.3 MVER = 3.5 MVER = 9.2 MVER = 4.1
RH = 93% RH = 75% RH = 94% RH = 75%
 Aridus® met RH target of < 80%
 Aridus met MVER target of: less
than 5 lbs./1000 SQ FT/24hr
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23. Validation Testing: Shrinkage
0.040
ASTM C157 SEAONC 0.036
Rapid Drying Concrete
Shrinkage Test 0.035
W/C = 0.41, 50% Cement, 6.5 sk
Conditions: 73 degrees, 50% 0.030 0.028
RH 0.024
0.025 0.023
0.021
Highlights: 0.020
0.020
 Aridus® concrete 0.015 0.013
dramatically outperforms a 0.011
“low-shrink” concrete 0.010
 Most of shrinkage occurs 0.005
during the first two weeks
0.000
7 Day 14 Day 21 Day 28 Day
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24. Validation Testing: Compressive Strength
ASTM C31
9,000
Compressive Strength Aridus w/c = 0.41, 50% Cement, 6.5 sk
8,000
Conditions: 73 degrees, 50% 7,000
RH
6,000
Strength (psi)
Highlights: 5,000
 Aridus® concrete is a 4,000
high, early-strength mix 3,000
2,000
 Design strength can be met
in seven days 1,000
0
4 7 28
Age (Day)
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25. Additional Testing: Slab Curling Test
Concrete Curling
Highlights:
 Aridus® mixture rapidly stabilizes
in less than a month
 Control: Degree of curl rises for
months.
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26. Thank You!
For more information contact:
Dave Perry
Vice President, Sales and Marketing
Central Concrete, A U.S. Concrete Company
www.centralconcrete.com
DPerry@us-concrete.com
Tel: 925-998-5169
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