Surface-Deterioration Resistance of Concrete Pavement Materials

2009 ◽  
pp. 327-327-16
Author(s):  
TF Fwa ◽  
P Paramasivam
Keyword(s):  
Concrete Pavement ◽  
Pavement Materials

Guidance for Increasing the Use of Recycled Concrete Pavement Materials

2021 ◽  
Author(s):  
Tara Cavalline ◽  
Mark Snyder ◽  
Tom Cackler ◽  
Peter Taylor
Keyword(s):  
Concrete Pavement ◽  
Recycled Concrete ◽  
Concrete Pavements ◽  
Pavement Materials ◽  
Concrete Aggregates ◽  
Recycled Concrete Aggregates ◽  
Technical Requirements ◽  
Federal Highway ◽  
Pavement Recycling ◽  
The Us

Recycling concrete pavements has been a common practice in the US for decades, and recently, public agencies have been more closely examining recycling opportunities. Reasons supporting recycling include the diminishing quantity of good natural materials, economics, improved project execution, minimizing traffic disruption, and supporting sustainability goals. Many states, however, have specifications or policies that restrict concrete pavement recycling. The contracting industry may overlook opportunities to use recycled concrete aggregates (RCAs) due to a lack of familiarity with technical requirements or uncertainty of performance. The National Concrete Pavement Technology Center (CP Tech Center) recently completed a comprehensive set of technical resources for the Federal Highway Administration to assist practitioners with sound approaches to project selection, scoping and construction requirements to support increased use of recycled concrete pavement materials. This paper describes the results of a 2016 survey of agency and industry RCA usage, presents an overview of the technical resources prepared as part of this initiative, and presents recommendations for supporting broader application of recycling concrete pavement materials.

Research on the Cement Matrix of Super Toughness Fiber Concrete

2014 ◽  
Vol 507 ◽  
pp. 347-352
Author(s):  
Xiao Ping Zhang ◽  
Chang Zheng Sun ◽  
Qian Chen
Keyword(s):  
Mixing Time ◽  
Concrete Pavement ◽  
Fiber Reinforced Concrete ◽  
Cement Matrix ◽  
Fiber Volume ◽  
Concrete Material ◽  
Cement Ratio ◽  
Pavement Materials ◽  
Fiber Concrete ◽  
Mixing Proportion

To research the mixing proportion of super toughness fiber concrete pavement materials, different cement sand ratio, and different fiber content super toughness of fiber reinforced concrete material were studied. The results showed that the characteristics of the cement matrix directly determined the magnitude of the fiber effect. With sand cement ratio of 2.5, the method of the extended mixing time, made the fiber dispersion, and thus enhanced the cohesive force. The effect of fiber volume content of 7d is larger than the effect of 28 days.

The Optimized Design for Groove Parameters Based on Cement Pavement Materials Performance

2011 ◽  
Vol 213 ◽  
pp. 613-617
Author(s):  
Yong Shou Yang ◽  
Xiong Yi ◽  
Peng Hu ◽  
Qiang Dong
Keyword(s):  
Theoretical Analysis ◽  
Laboratory Tests ◽  
Optimal Choice ◽  
Concrete Pavement ◽  
Service Performance ◽  
Optimized Design ◽  
Cement Concrete ◽  
Pavement Materials ◽  
Cement Concrete Pavement

Aiming at the service performance characteristics of cement concrete pavement, this paper puts forward optimized design concept for groove parameters of cement pavement. Single groove parameter optimal choice is systematically analyzed based on integrated service quality of cement pavement. Through a variety of multi-contrast laboratory tests and theoretical analysis, from three aspects of anti-slide, strength, and noise reduction, optimized design scheme of groove parameters are demonstrated and proposed, and groove parameters and form suitable for environment characteristics in seasonal frozen region are given.

Laboratory Evaluation of Sound Absorption Characteristics of Pervious Concrete Pavement Materials

2017 ◽  
Vol 2629 (1) ◽  
pp. 91-103 ◽  
Author(s):  
Longjia Chu ◽  
Tien F. Fwa ◽  
Kiang H. Tan
Keyword(s):  
Sound Absorption ◽  
Field Testing ◽  
Concrete Pavement ◽  
Pervious Concrete ◽  
Practical Significance ◽  
Laboratory Evaluation ◽  
Portland Cement Concrete ◽  
Frequency Range ◽  
Pavement Materials ◽  
Absorption Characteristics

This paper describes a laboratory study on the sound absorption characteristics of clogged and unclogged pervious concrete (PC) pavement materials compared with those of porous asphalt (PA) mixtures and those of conventional dense-graded asphalt and portland cement concrete pavement materials. Examined in this study were the effects of the mixtures’ initial porosity on their sound absorption characteristics and how these characteristics were affected by subsequent clogging of the mixtures. Four porosity levels of PC and PA were studied: 10%, 15%, 20%, and 25%. The mixtures with 20% porosity were tested for the effects of clogging. The test results showed that the shapes of sound absorption spectra of PC and PA materials were similar displayed high sound absorption values within the frequency range of 250 to 1,000 Hz. However, for all four porosity levels studied, the PC materials produced about 0.1 or 20% higher sound absorption coefficient values throughout the entire measured frequency range from 100 to 2,500 Hz. The same order of magnitude of differences in the sound absorption values between PC and PA was also observed in their clogged states. The finding that PC exhibits a better sound absorption capability than PA is of practical significance. The results of this study also demonstrate that laboratory testing of sound absorption can be employed to provide a useful indicative assessment of the noise reduction properties of porous pavement materials without the need for full-scale field testing.

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