Keywords:Pervious concretePerformanceEvaluationLaboratory mixesField mixes
cores were evaluated and compared through laboratory performance tests, including air voids, perme-
te (PCconsisd littl
has attracted more and more attention in concrete industry dueto the increased awareness of environmental protection. Many lab-oratory and eld studies have been conducted to investigate intovarious aspects of pervious concrete [14,912]. Researchers atthe National Concrete Pavement Technology Center (NCPTC) devel-oped the mix proportions for pervious concrete in cold weather cli-mates [1,9,10]. Delatte et al. [11,12] veried that PCPC can perform
ditional concrete may not be suitable for pervious concrete.Many studies revealed that unlike conventional concrete, the
performance of pervious concrete is highly dependent on both con-crete materials and construction techniques [1,11,12]. The focus ofpervious concrete technology is the balance of permeability andmechanical properties as well as durability. If the mixture is toowet and easy to compact, the voids will be clogged and the perme-ability will be compromised. However, if the mixture is too dry andhard for compaction, the pervious concrete pavement will be weakand vulnerable to various types of distress. Although specications
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Construction and Building Materials 25 (2011) 31873192
Contents lists availab
evE-mail address: email@example.com (X. Shu).Use of uniform coarse aggregate and little or no ne aggregategives PCPC much higher porosity and permeability than conven-tional concrete, which enables quick drainage of stormwater . Therefore, PCPC is a very effective stormwater management toolto reduce the volume of stormwater runoff and the concentrationof pollutants . In addition, pervious concrete can also reduce ur-ban heat island effect and acoustic noise [6,7].
Since it was rst introduced into the United States in the mid1970s, pervious concrete has been used in many applications forover 30 years . During the last few years, pervious concrete
lected aggregates, adding ne aggregates and organic intensiers,and optimizing mix proportion to improve the strength and abra-sion resistance of PCPC. Kevern  showed that the addition ofpolymer (styrene butadiene rubber, SBR) signicantly improvesworkability, strength, and freezethaw resistance of pervious con-crete while maintaining its high porosity and permeability. Huanget al.  improved the strength properties of pervious concretethrough polymer modication. Kevern et al.  identied thatcoarse aggregate type has a direct effect on the freezethaw dura-bility of pervious concrete and certain aggregates approved for tra-1. Introduction
Portland cement pervious concretally friendly paving material. PCPCwater, uniform coarse aggregate, an0950-0618/$ - see front matter Published by Elsevierdoi:10.1016/j.conbuildmat.2011.03.002ability, compressive and split tensile strengths, as well as Cantabro and freezethaw durability tests.Two types of coarse aggregate, limestone and granite, with two gradings, No. 8 and No. 89 specied inASTM C33, were used to produce the mixtures. Latex, air-entraining admixture (AEA), and high rangewater reducer (HRWR) were also added to improve the overall performance of pervious concrete. Theresults indicated that the mixtures made with limestone and latex had lower porosity and permeability,as well as higher strength and abrasion resistance than other mixtures. Even for pervious concrete, theaddition of AEA could still help to improve the freezethaw resistance. The comparison between labora-tory and eld mixtures showed that a properly designed and laboratory veried pervious concrete mix-ture could meet the requirements of permeability, strength, and durability performance in the eld.
Published by Elsevier Ltd.
PC) is an environmen-ts of portland cement,e or no ne aggregate.
well in freezethaw environments based on the results from eldvisual inspection and laboratory performance tests.
Due to its high porosity, pervious concrete generally has signif-icantly lower strength and durability properties than conventionalconcrete. Yang and Jiang  suggested using appropriately-se-Available online 26 March 2011for laboratory tests to ensure the anticipated performance of laboratory designed pervious concrete. Inthis study, the performance of laboratory and eld produced pervious concrete mixtures as well as eldPerformance comparison of laboratory anconcrete mixtures
Xiang Shu , Baoshan Huang, Hao Wu, Qiao Dong, EDepartment of Civil and Environmental Engineering, The University of Tennessee, Knoxv
a r t i c l e i n f o
Article history:Received 29 October 2010Received in revised form 18 February 2011Accepted 1 March 2011
a b s t r a c t
Portland cement perviousincreasingly used in parkitions are available for the
journal homepage: www.elsLtd.eld produced pervious
in G. BurdetteTN 37996, USA
crete (PCPC) is an environmentally friendly paving material that has beenots as well as low volume and low speed pavements. Although specica-design and construction of pervious concrete, there still remains a need
le at ScienceDirect
ier .com/locate /conbui ldmat
are available for the mix design and construction of pervious con-crete, there still remains a need for laboratory tests to ensure theanticipated performance of laboratory designed pervious concrete.This study presents the comparison among laboratory and eldproduced mixtures as well as eld cores in terms of air voids, per-meability, strength, Cantabro loss, and freezethaw durability. Theresults showed that a properly designed and laboratory veriedpervious concrete mixture could meet the requirements of perme-ability, strength, and durability performance in the eld.
2. Research objective and scope
The objective of the present study was to evaluate and compare
vious concrete mixtures. To improve the overall performance of
paction. The specimens were cured in a standard moisture curing
men dimension reect its surface texture and true volume. There-
developed by Huang et al.  for porous asphalt mixtures (similar
The split tensile strength test was conducted on150 mm 63.5 mm cylindrical specimens with an MTS machine
Mix. no. L1 L2 L3 L4 L5 F1 F2 F3
390 390 360 360 350140 100 110 95 90LS LS LS LS LSNo. 89 No. 89 No. 8 No. 8 No. 81440 1440 1440 1440 1490109 109 100 100 100 39 36 36 0.91160 1160 470 940 470390 390 690 690 700500 500 500 500 500
3188 X. Shu et al. / Construction and Building Materials 25 (2011) 31873192Cement 380 390 390Water 100 140 100Coarse aggregate GR LS LS
No. 89 No. 89 No. 891420 1440 1440
Fine aggregate 107 109 109Latex 38 39Fiber HRWR (ml) 1150 1160 1160AEA (ml) VMA (ml) 500 500 500chamber until the days of testing. The pervious concrete pavementwas compacted with manual rollers (Fig. 1). Field cores 150 mm. indiameter were extracted from the pervious concrete pavement3 weeks after construction and transported to the University ofTennessee for laboratory testing.
Table 1Mix. proportions for laboratory and eld produced mixtures (kg/m3).
Mix. type Laboratory mixturesPCPC, ne aggregate, latex, monolament polypropylene ber,high range water reducer (HRWR), air-entraining admixture(AEA), and viscosity-modifying admixture (VMA) were added tothe mixtures. The mix proportions for the laboratory and eldproduced pervious concrete mixtures in this study are based on alaboratory mix design presented in Table 1.
3.2. Sample preparation
The laboratory produced pervious concrete mixtures weremixed using a rotating-drum mixer. The eld mixtures were col-lected in the middle of placement from a truck mixer at a readymix concrete plant (the eld project was in the plant). Laboratorytest specimens were made by applying standard rodding for com-the laboratory and eld produced pervious concrete mixtures aswell as eld cores through laboratory performance testing. The lab-oratory testing employed for the evaluation included the tests forair voids, permeability, compressive and split tensile strengths,Cantabro loss, and freezethaw durability.
3. Laboratory experiment
Ordinary Type I Portland cement was used in the mixtures. Twocoarse aggregates, limestone and granite, with two gradings, No.89 and No. 8 specied in ASTM C33, were used to produce the per-Note: GR granite, LS limestone, HRWR high range water reducer, AEA air-entraininASTM C33.to pervious concrete in permeability) was used to obtain the pseu-do-coefcient of permeability of pervious concrete mixtures. De-tailed information about the test and the analysis method can befound in Huang et al. [13,15]. 150 mm 75 mm cylindrical speci-mens were used in this test.
3.5. Compressive and split tensile strength tests
The compressive strength test was conducted at 28 days inaccordance with ASTM C39. An INSTRON testing machine was usedto perform this test on 100 mm 200 mm cylindrical specimens.fore, a vacuum package sealing device, CoreLok (Fig. 2), commonlyused to measure the specic gravity and air void content for as-phalt mixtures, was used in this study to obtain the air voids ofpervious concrete specimens. This test was conducted by followingthe ASTM D7063 procedures.
3.4. Permeability test
Due to high porosity and permeability, Darcys law for laminarow is not applicable to pervious concrete. In this study, a fallinghead permeability measurement device (Fig. 3) and a method3.3. Air voids test
Since pervious concrete has a relatively hig