As the world becomes more urbanized, concerns over urban heat island (UHI) are pronounced. Increased temperatures have a negative affect on natural and human environment by producing increased energy usage smog formation. Pervious concrete pavement is one technology that may help mitigate temperatures. Temperature data from an instrumented site in Iowa storage phenomena for various weather patterns presented. The contains both pervious with solar reflectance index (SRI) of 14 traditional SRI...

Abstract Recent stormwater management regulations from the Environmental Protection Agency (EPA) and greater emphasis on sustainable development has increased interest in pervious pavement as a method for reducing runoff improving quality. Pervious concrete is one of several systems that can be used to reduce treat site. have been are being proposed all parts United States, including northern climates where severe freezing thawing occur. The purpose research develop mixtures sufficient...

Pervious concrete is becoming more common as a storm-water management tool in freeze-thaw climates. One of the main concerns or obstacles preventing widespread application aspect durability, whether perceived actual. This paper describes series tests designed to determine specific role coarse aggregate has on durability pervious using ASTM C666A procedure. 17 different samples were obtained from locations across United States and Canada. mixtures placed mixture proportion previously...

This paper presents the results of a testing plan designed to evaluate effects macrosynthetic fibers on pervious concrete material properties and durability. The two lengths (38 56 mm) were investigated at three dosage rates (1.5, 3.0, 4.5 kg/m3) in single mixture. unit weight void content all samples controlled allow determination caused directly by fibers. Samples tested for strength durability properties. indicate that general reduced permeability infiltration rate, while reducing surface...

Abstract Porous asphalt pavement is a sustainable infrastructure tool used to benefit urban resilience. This paper summarizes the design, construction, and maintenance practices of porous pavements (PAPs) specific cold regions. It includes discussions on structural design considering frost depth heave subgrade soils, material selection for adequate freeze-thaw durability, construction PAPs in weather, winter snow ice control, performance deterioration caused by other activities such as...

To achieve the permitted stormwater effluent limits required by Clean Water Act, many best management practices (BMPs) are being utilized to reduce overall volume and provide initial pretreatment pollutant removal. One such BMP is use of portland cement pervious concrete (PCPC), which allows pass through pavement into an aggregate base below infiltrate. Until now, temperature response entire system (concrete, base, natural soil) was not known. Since PCPC infiltration-based BMP, once a frost...

Portland cement pervious concrete (PCPC) is increasingly used across the United States, and this has prompted various entities to begin process of developing standardized test techniques. A major issue with placing PCPC inconsistencies in workability between mixtures developed laboratory field. It therefore urgent properly determine ensure that designed are suitable for particular compaction methods field conditions. This paper describes a new method characterizing workability—the gyratory...

This study reports on formulations and conditions for producing fly ash-based geopolymers with a view to showing that the compressive strength required construction applications can be obtained without addition of aggregates, sand, and/or cement. It was shown in series experiments constituting at least 73% ash up 90 MPa depending curing conditions. While high alkalinity resulted stronger materials, results showed about 40% savings CO2 emissions using sand Such materials are suited minimal...

This paper discusses a framework for incorporating sustainable design/thinking as new civil engineering course and experiences from the pilot offering. Important areas are outlined to aid all engineers in understanding sustainability context with traditional principles. Green-building rating systems were used introduce concepts of buildings infrastructure, highlighted by presentations green-building professionals. By providing better through education, can provide proactive solutions growing...

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Self-cleaning, air-purifying pervious concrete pavement is a promising technology that can be constructed with air-cleaning agents superhydrophilic photocatalyst capabilities, such as titanium dioxide. Although this has the potential of supporting environment-friendly road infrastructure, its effectiveness depends on number design and operational parameters need to evaluated. The objective study was evaluate mechanical, environmental, mix influence performance photocatalytic pavement. To...

Abstract This paper presents a unique combination of permeability, infiltration, and clogging testing results to provide background information for the specification design clog-resistant pervious concrete pavements. Pervious cylindrical samples various sizes porosities were tested using falling-head permeameter in laboratory. The wall effect on porosity permeability was determined image analysis along with variability. Infiltration series fixed void slab that then clogged compost, soil,...

Catastrophic release of heavy metals from the King River mine in Colorado and Minas Gerais dam Brazil have brought to forefront importance contaminant stabilization remediation surface waters. Permeable reactive materials are currently utilized for other pollutants by employing media remove contaminants. This research investigated use fly ashes with loss on ignition or sulfur trioxide exceeding ASTM C618 limits enhance pollutant removal pervious concrete. The high carbon contents...

Abstract The current method of curing pervious concrete is to cover with plastic for 7 days, although no studies have been performed determine if that sufficient or even required. This paper presents results combinations four different mixtures cured using six common methods. surface abrasion the was tested a rotary cutter device according ASTM C944. show resistance improved majority surface-applied compounds; however surfaces covered sheets produced lowest levels. A regimes also higher...

Curing of cement based products such as concrete and mortar, is very important to achieve good strength durable products. However the curing environment plays a pivotal role in overall quality terms development. ASTM C192 allows moist either fog room or under water. However, these must meet C511 which controls temperature, specifically for water curing, concentration calcium ions solution. Unfortunately many parts world, literally means tap This done primarily because there lack knowledge...

Abstract The current pervious concrete placed in cold climates generally contains air entrainment but, unlike traditional concrete, the evaluation of entrained is not performed. This paper presents results from a study that characterized voids using RapidAir system. system an automatic device determines void properties hardened according to ASTM C457, “Standard Test Method for Microscopical Determination Parameters Air-Void System Hardened Concrete.” Two types aggregates, i.e., crushed...

Portland cement pervious concrete (PCPC) has shown great potential to reduce roadway noise, improve splash and spray, friction as a surface wearing course. A study is under way at Iowa State University the National Concrete Pavement Technology Center develop mix designs procedures for PCPC overlays highway applications. report produced on construction performance of overlay constructed Minnesota Road Research Project low-volume test facility determine effectiveness an overlay. Issues related...

The damaging impact of deicing chemicals on portland cement pervious concrete materials was investigated. Two mixes (with and without latex modification) were subjected to three (sodium chloride, calcium calcium-magnesium acetate) under a freezing–thawing or drying–wetting condition. chemical application methods (saturated drained) employed. the evaluated based mass strength losses. Of studied, chloride solution caused most damage, while magnesium acetate least. saturated scaling test...