Pervious Concrete Report

Pervious Concrete Report - ACI MATERIALS JOURNAL TECHNICAL...

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ACI Materials Journal/March-April 2011 187 ACI MATERIALS JOURNAL TECHNICAL PAPER ACI Materials Journal , V. 108, No. 2, March-April 2011. MS No. M-2010-067.R1 received March 5, 2010, and reviewed under Institute publication policies. Copyright © 2011, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors. Pertinent discussion including authors’ closure, if any, will be published in the January-February 2012 ACI Materials Journal if the discussion is received by October 1, 2011. This research investigates the durability of pervious concrete under simulated field conditions, including slow cyclic freezing and thawing, wet-dry environments, and salt applications. Specifically, this research examines the effects of materials and proportions and curing conditions on the freezing-and-thawing durability of pervious concrete. Generally, air curing causes a dramatic reduction in the freezing-and-thawing durability as compared with water curing. Silica fume additions are observed to improve the performance of water-cured pervious concrete during slow freezing and thawing while causing a significant drop in the performance of air-cured specimens. Polypropylene fibers are seen to enhance the resistance of pervious concrete to repeated freezing and thawing, whereas salt applications are noted to aggravate the deterioration. In addition, wet-dry cycles are found to slow down the freezing-and-thawing damage development when the duration of the wet cycle is less than 3 days. Keywords: deicing salts; fiber reinforcement; pervious concrete; silica fume; slow freezing and thawing; wet-dry cycles. INTRODUCTION There is an increasing interest in pervious concrete in pavement and parking lot construction because it is beneficial in managing storm-water runoff, recharging groundwater, and improving water quality. Many studies have been conducted on pervious concrete to broaden its applications and to enhance its long-term performance. 1-3 For example, Wang et al. 4 and Schaefer et al. 5 investigated the effect of materials and proportions on pervious concrete’s serviceability and concluded that pervious concrete can achieve high performance when it is properly designed. Bury et al. 6 studied the role of chemical admixtures on the performance of pervious concrete. It was observed that the use of chem- ical admixtures facilitated the placement and compaction of pervious concrete. Wanielista et al. 7 and Montes and Haselbach 8 assessed the hydraulic performance of various sites of pervious concrete pavements and concluded that pervious concrete could provide sufficient infiltration rates for storm-water runoff without routine maintenance when adequately installed. In studies on construction techniques, Crouch et al. 9
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This note was uploaded on 10/20/2011 for the course ENGIN 200 taught by Professor Miller during the Spring '11 term at University of Cincinnati.

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Pervious Concrete Report - ACI MATERIALS JOURNAL TECHNICAL...

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