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Mike Pleše , PE
AUI, Inc.
PERVIOUS CONCRETE IN
NEW MEXICO
AUI awarded NMDOT NM-47
Reconstruction
Project Utilizes pervious concrete in
roadway section for drainage system
PROJECT REVIEW
COLLABORATIVE
SPECIFICATION
AMENDMENTS
Revised Mix Design Compressive
Strength from 3,800 psi to 2,400 psi
Add Durability Test (ASTM C1747); 35%
to 45% loss.
Voids 18% to 30% - Unchanged
W/C Ratio 0.26 to 0.34 – Unchanged
Minimum Fly Ash 15% - Unchanged
MIX DESIGN AMENDMENTS
Density and Void Content of Freshly Mixed Pervious Concrete (ASTM C1688); +/- 5 lbs. per cubic foot of Design Target; One per Truck
Density and Void Content of Hardened Pervious Concrete (ASTM C1754); One per Day
Infiltration Rate of In-Place Pervious Concrete (ASTM C1701); One per Day
CONTRACTOR QUALITY CONTROL
Compressive Strength Revised from 3,000 psi to Information Only; No Published ASTM or AASHTO Test Method
Density and Void Content of Freshly Mixed Pervious Concrete (ASTM C1688); +/- 5 lbs. per cubic foot of Design Target; One per Truck
Density and Void Content of Hardened Pervious Concrete (ASTM C1754); +/- 5% of Target Value Established by Accepted Test Panel
Infiltration Rate of In-Place Pervious Concrete (ASTM C1701); 100 inches per hour minimum
ACCEPTENCE TESTS
LABORATORY TRIALS
Water/Cementitious Ratio
0.26 0.29 0.34
Specification Limits
Portland Cement 539 lbs. 468 lbs. 384 lbs. Fly Ash 95 lbs. 84 lbs. 68 lbs. Water 165 lbs. 160 lbs. 153 lbs. Course Aggregate 3/8” 2480 lbs. 2500 lbs. 2480 lbs. Unit Weight (ASTM C1688)
124.3 lbs./c.f. 118.1 lbs./c.f. 116.7 lbs./c.f.
Durability (ASTM C1747)
35% to 45% 32.6% loss 41.6% loss 47.8 % loss
Plastic Void Content (ASTM C1688)
18% to 30% 16.9 % 22.4 % 23.3 %
28 day Compressive Strength
2,400 psi min. 2,960 psi 2,460 psi 1,850 psi
Metallic Sheen yes yes yes
Outside Specification Parameters
Seven Test Panels
Mix Setting before placement was complete
Loss of Metallic Sheen
Addition of Hydration Stabilizer – 5X standard dosage
FIELD TRIALS
Deficient Consolidation at Bottom of
Placement
Addition of Vibratory Plate Compactor
FIELD TRIALS
Rough grade ½” high
Flat Plate Compactor
Weighted Roller Screed to Finish Grade
Pan Float to set aggregate
Cure with plastic cover
INSTALLATION PROCESS
Fresh Mix Density (supplier consistency)
ASTM C1688
Proctor Hammer
Acceptable Results + 5 lbs/ft3 of mix design
PERVIOUS CONCRETE TESTS
Hardened Density
(contractor
consistency)
ASTM C1754
Two (2) drying methods:
pick one (1) and stay
with it
Acceptable Result + 5%
of Test Section Density
PERVIOUS CONCRETE TESTS
112.93 lbs./c.f. 106.78 lbs./c.f.
TEST DISCREPANCY
Infiltration Test
ASTM C1701
As defined by contract requirements
PERVIOUS CONCRETE TESTS
Specialized Cleaning Equipment
Determine Frequency
No De-icing Agents
DON’T FORGET MAINTENANCE
Industry is continually refining Pervious Concrete
Attend Conferences
National Ready Mix Concrete Association
American Concrete Institute
National Pervious Concrete Pavement Association
Pervious Roast
Reach out to Industry Experts
EVOLUTION OF PERVIOUS CONCRETE