Experience of Replacing Basalt Aggregate by Limestone’s in Porous Asphalt Concrete

2014 ◽  
Vol 1025-1026 ◽  
pp. 749-754
Author(s):  
Chang Hong Zhou ◽  
Shao Hua Liu ◽  
Qiang Yuan
Keyword(s):  
Asphalt Concrete ◽  
Design Method ◽  
Porous Asphalt ◽  
Marshall Test ◽  
Forming Temperature ◽  
Low Strength ◽  
Effective Use ◽  
The Cost ◽  
Porous Asphalt Concrete

In order to reduce the cost of Porous asphalt concrete and the effective use cheap limestone widely distributed in local, the gradation design works of limestone-typed PAC is presented in this paper. Considering convenience of building and testing for local enterprises, Marshall Design Method, still used in local standards, is adopt. Limestone usually shows low strength and easy break, which obviously affect the performance of mixture. Therefore, Forming temperature and beat numbers of Marshall Test is researched. The results show that: a) Regular aggregate, whose shape is similar to a cube, with low flat ratio and low crushing value is important for improving the performance of limestone-typed PAC. b) Forming temperature and Beat number is suggested taking 155°C and 35 times. c) The standard of limestone-typed PAC should not be as same as basalt-typed. The indices can be suitably lessened according to the actual conditions of aggregates.

Research on Mixture Design and Mechanical Performance of Porous Asphalt Concrete in Cold Regions

2011 ◽  
Vol 299-300 ◽  
pp. 770-773
Author(s):  
Jin Hua Xu ◽  
Si Li Chen ◽  
Ying Wang ◽  
Gang Li
Keyword(s):  
Asphalt Concrete ◽  
Mechanical Performance ◽  
Material Selection ◽  
Temperature Stability ◽  
Cold Climate ◽  
Freezing And Thawing ◽  
Cold Regions ◽  
Porous Asphalt ◽  
Marshall Test ◽  
Porous Asphalt Concrete

Porous asphalt pavement (PAC) is constructed with an open-graded porous mixture with 15–25% designed air void and 4–5 cm surface thickness. This paper presents paving material selection and requirements of porous asphalt concrete in the cold regions. Through a series of laboratory tests, optimum gradation of the aggregates and bitumen content (BC) were selected, which met all aspects of performance indexes. Uniform experiment design methods, including Marshall test, immersion Marshall test and Freezing–thaw indirect tensile test, were applied to analyze road performance of PAC, such as temperature stability, water stability, resistance to Freezing and thawing and so on. The results confirmed that PAC studied is an effective pavement surfacing materials in cold climate regions.

scholarly journals Assessing the Marshall Properties of Porous Asphalt Concrete

2021 ◽  
Vol 27 (3) ◽  
pp. 113-129
Author(s):  
Ghaidaa Abdl Wahab Majeed ◽  
Saad Issa Sarsam
Keyword(s):  
Carbon Fibers ◽  
Asphalt Concrete ◽  
Design Method ◽  
Asphalt Mixture ◽  
Asphalt Pavements ◽  
Air Voids ◽  
Porous Asphalt ◽  
On The Road ◽  
The Stability ◽  
Porous Asphalt Concrete

Porous asphalt paving is a modern design method that differs from the usual asphalt pavements' traditional designs. The difference is that the design structure of porous pavements allows the free passage of fluids through their layers, which controls or reduces the amount of runoff or water accumulated in the area by allowing the flow of rain and surface runoff.  The cross-structure of this type of paving works as a suitable method for managing rainwater and representing groundwater recharge. The overall benefits of porous asphalt pavements include environmental services and safety features, including controlling the build-up of contaminated metals on the road surface, rainwater management, resistance to slipping accidents, reduced splashing, and spraying pedestrians and drivers. In this study, the porous mixture's volumetric and physical properties were tested, and the use of carbon fibers as a type of mixture improver. The results were compared after performing the following steps: Selecting the best gradient for the porous asphalt mixture by selecting the largest proportion of air voids from three gradations group according to specifications (ASTM 7064), then choosing the optimum asphalt ratio according to the standard specifications, which are the value of drain down % and the Cantabro abrasion loss % value, as well as the ratio of air voids. After obtaining the optimum asphalt ratio, samples of the asphalt mixture were prepared. Carbon fibers were added to it at a rate of (0.3%) by weight of the total mix and a length of (2 cm) and prepared samples without additives. They were tested by a Marshall device to calculate the stability and flow value and show the effects of fibers on porous asphalt concrete properties. An increase in the stability value and a decrease in the flow and reduction in the drain down rate during exposure to high temperature were observed for the samples containing carbon fibers, by 48.8%, 44%, and 72%, respectively

A STUDY ONTHEWEARINGCHARACTERISTICS OF POROUS ASPHALT CONCRETE

2000 ◽  
Vol 5 ◽  
pp. 96-102
Author(s):  
Satoshi KURODA ◽  
Yoshiteru KATO ◽  
Yasuo GUNJI
Keyword(s):  
Asphalt Concrete ◽  
Porous Asphalt ◽  
Porous Asphalt Concrete

Induction heating of electrically conductive porous asphalt concrete

2010 ◽  
Vol 24 (7) ◽  
pp. 1207-1213 ◽  
Author(s):  
Quantao Liu ◽  
Erik Schlangen ◽  
Álvaro García ◽  
Martin van de Ven
Keyword(s):  
Induction Heating ◽  
Asphalt Concrete ◽  
Electrically Conductive ◽  
Porous Asphalt ◽  
Porous Asphalt Concrete

Research on Effect of Equivalent Diameter of Voids on Sound Absorption Performance of Porous Asphalt Concrete Based on Grey Entropy Method

2020 ◽  
Vol 861 ◽  
pp. 414-420
Author(s):  
Ming Xi Liu ◽  
Jian Guang Xie ◽  
Zhan Qi Wang ◽  
Yan Ping Liu
Keyword(s):  
Asphalt Concrete ◽  
Sound Absorption ◽  
Traffic Noise ◽  
Entropy Method ◽  
Equivalent Diameter ◽  
Air Voids ◽  
Porous Asphalt ◽  
Absorption Performance ◽  
The Relationship ◽  
Porous Asphalt Concrete

The sound absorption performance of porous asphalt concrete (PAC) is inseparable from the sizes of voids, as different sizes of voids have different absorption effects on noise in different frequency bands. However, the relationship between the two is not clear. In this study, the equivalent diameter of voids was obtained by the proposed image segmentation algorithm based on the square area, then grey entropy method was used to analyze the effect of different equivalent diameter of voids on the sound absorption performance of PAC in the frequency range of traffic noise. The results show that with the increase of air voids, the peak and average sound absorption coefficient of PAC increase, the sound absorption performance of PAC is improved; and the sound absorption performance of PAC is mainly affected by the equivalent diameter of voids of 3-4mm.

scholarly journals Porous asphalt concrete: A review of design, construction, performance and maintenance

2020 ◽  
Vol 13 (6) ◽  
pp. 601-612 ◽  
Author(s):  
Jian-Shiuh Chen ◽  
Chin Hung Yang
Keyword(s):  
Asphalt Concrete ◽  
Material Selection ◽  
Winter Maintenance ◽  
Porous Asphalt ◽  
Pavement Surface ◽  
Long Run ◽  
The World ◽  
And Performance ◽  
Porous Asphalt Concrete ◽  
Design Construction

AbstractPorous asphalt concrete (PAC) is an open-graded friction course that is specifically designed to have high air void contents for removing water from the pavement surface. PAC surfaces, which include open-graded friction courses, permeable friction courses, and drainage asphalt pavements, have increasingly gained acceptance among agencies and industry in the world. PAC might be susceptible to freeze-thaw damage in cold climates and require winter maintenance practices. The life span of PAC pavements shows a large variation depending on climates, traffic volumes and loadings, design and construction practices. The objective of this paper was to review design, construction, and performance that could maximize the advantages and minimize the disadvantages associated with the use of PAC mixtures. A consolidated review of the worldwide literature on PAC applications was conducted, with attention to the use of PAC in agency practices, and specifications for PAC from the world were evaluated. Based on an analysis of the results of this review, two key features were emphasized: (1) a recommended practice for material selection and design of PAC, and (2) a recommended practice for PAC construction and maintenance. Key points include a careful assessment of the PAC drainage and an adequate asphalt content to improve the performance of the pavement surface. A proper binder content stabilized by additives such as fibers and polymers is essential to ensure sufficient film thickness that is critical to the durability of the PAC mix in the long run.

scholarly journals Investigation of Water Uptake in Porous Asphalt Concrete Using Neutron Radiography

2014 ◽  
Vol 105 (2) ◽  
pp. 431-450 ◽  
Author(s):  
Sreeyuth Lal ◽  
Lily D. Poulikakos ◽  
Marjan Sedighi Gilani ◽  
Iwan Jerjen ◽  
Peter Vontobel ◽  
...  
Keyword(s):  
Water Uptake ◽  
Asphalt Concrete ◽  
Neutron Radiography ◽  
Porous Asphalt ◽  
Porous Asphalt Concrete
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