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Technical Paper submitted to ACI Materials Journal:
STRENGTH MEASUREMENTS OF FIELD-PLACED PERVIOUS CONCRETE
Liv M. Haselbach (ACI Member), Charles E. PiercePPP
PPP
(ACI Member),Kevin S. Pulis,Felipe Montes, and Srinivas Valavala
Liv M. Haselbach, ACI Member, is an assistant professor in the Department of Civil and
Environmental Engineering at the University of South Carolina, Columbia, SC. She
received her PhD from the University of Connecticut in 2000 and has research interests in
sustainable construction. She is a member of ACI Committee 522, Pervious Concrete.
Charles E. Pierce, Member ACI, is an associate professor in the Department of Civil and
Environmental Engineering at the University of South Carolina, Columbia, SC. He
received his PhD from Northwestern University in 1998 and has research interests on the
use of by-products in cement-based materials. He is a member and current secretary of
ACI Committee 229, Controlled Low-Strength Materials, and is a member of ACI
Committee 555, Concrete with Recycled Materials.
Kevin S. Pulis is a civil engineer at Freeland & Associates, Inc., a site development and
surveying firm in Greenville, SC. He received his BS in Civil and Environmental
Engineering from the University of South Carolina in December 2004.
Felipe Montes is a graduate research assistant in the Department of Civil and
Environmental Engineering at the University of South Carolina. He received his MS in
Biosystems Engineering from Clemson University.
Srinivas Valavala is a stormwater engineer with Richland County, South Carolina. He
received an MS from the Department of Civil and Environmental Engineering at the
University of South Carolina and a BTech in Civil Engineering from JNTU College of
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Engineering, Kakinada, India.
ABSTRACT
Pervious concrete is an alternative paving surface with potential environmental benefits
such as reduced stormwater runoff. There is a need for correlations between its
environmental characteristics such as porosity and load-bearing properties such as
strength so that designers can specify the product for multiple purposes. This paper
evaluates several mechanical properties of two representative field-placed pervious
concrete slabs, one produced with a low-porosity (P25%) mixture. Beams were sawcut from each slab and tested for
flexural strength. Block specimens were sawcut from each slab and then cored to measure
porosity and compressive strength as per ASTM C39 at different ages, with an apparent
acceptable level of statistical variation for the strength measurement. There is an apparent
correlation between an increase in porosity and a decrease in compressive strength for the
specimens. Significant variations of porosity and consequently strength were noted based
on location within a slab. It is recommended that multiple representative cores are tested
and future studies performed to correlate field placement techniques with spatial
variations of mechanical properties.
Keywords: pervious concrete; no-fines concrete; porous concrete; runoff; nonpoint
source pollution; porosity; compressive strength; flexural strength.