scholarly journals Design, Construction, and Preliminary Investigations of Otta Seal in Iowa

2019 ◽  
Vol 2673 (12) ◽  
pp. 821-833 ◽  
Author(s):  
Sharif Y. Gushgari ◽  
Yang Zhang ◽  
Ali Nahvi ◽  
Halil Ceylan ◽  
Sunghwan Kim ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Dust Control ◽  
Decision Makers ◽  
Road User ◽  
Fine Aggregate ◽  
Seal Design ◽  
Structural Capacity ◽  
Local Roads ◽  
Design Construction ◽  
Aggregate Particles

Faced with limited financial resources, pavement engineers constantly seek more durable and economical technologies for road preservations and rehabilitations. Consequently, there have been many efforts to study resurfacing strategies, including various types of sealing for local roads. Among different sealing methodologies, Otta seal is a technique that has not yet been sufficiently studied in the U.S.A. For this investigation, the first Otta seal site in the state of Iowa was constructed using a double-layer Otta seal design over 6.4 km of cracked asphalt pavement. Otta seal design and construction details are documented and discussed, and test sections using various aggregates are compared for performance. The key lesson learned was that proper aggregate selection within gradation limits and aggregate spread rates were critical factors for Otta seal performance. Otta seal capability for holding loose aggregate particles and for dust control were examined, and there were indications that excessive proportion of fine aggregate particles could lead to diminished performance associated with fugitive dust emissions and unbound aggregate particles. Although the Otta seal provided a smooth surface satisfying road user and agency requirements, it did not significantly add structural capacity to the existing asphalt pavement. The findings from this study will benefit road officials and other decision makers who need to consider alternatives for resurfacing distressed low-volume asphalt roads.

Design, construction, and evaluation of energy-harvesting asphalt pavement systems

2019 ◽  
Vol 21 (6) ◽  
pp. 1647-1674 ◽  
Author(s):  
Nooralhuda F. Saleh ◽  
Ali A. Zalghout ◽  
Samir A. Sari Ad Din ◽  
Ghassan R. Chehab ◽  
George A. Saad
Keyword(s):  
Energy Harvesting ◽  
Asphalt Pavement ◽  
Design Construction

The Influence of Porous Asphalt Pavement Based on DEMATEL

2012 ◽  
Vol 178-181 ◽  
pp. 1333-1337 ◽  
Author(s):  
Ching Tsung Hung ◽  
Shih Huang Chen ◽  
Chia Chen Wu
Keyword(s):  
High Performance ◽  
Asphalt Pavement ◽  
Laboratory Method ◽  
Road User ◽  
Porous Asphalt ◽  
Decision Method ◽  
Drainage Capacity ◽  
Pavement Construction ◽  
The Relationship ◽  
Multiple Conditions

Taiwan position is in the subtropics, the climate is high temperature and much rains of year. Freeway mostly uses traditional dense grade in pavement construction, so the pavement could not remove water quickly in rainy day. It will deteriorate by rutting and aging, due to increasing maintenance frequency and cost. Porous asphalt pavement has high performance on road user safe and amenity in many countries. But the prescription in porous asphalt is Variable, for example, the fiber has miner and wood. Base on multiple conditions, the best performance can choice by multiple criteria decision method. This methodology needs the criteria under independent, but the real world is not. The study use Decision-Making Trial and Evaluation Laboratory method to establish the relationship in criteria. With result, the drainage capacity was the important factor in porous asphalt pavement.

High-Performance Thin-Lift Overlays with High Reclaimed Asphalt Pavement Content and Warm-Mix Asphalt Technology

2012 ◽  
Vol 2293 (1) ◽  
pp. 18-28 ◽  
Author(s):  
Walaa S. Mogawer ◽  
Alexander J. Austerman ◽  
Robert Kluttz ◽  
Michael Roussel
Keyword(s):  
High Performance ◽  
Asphalt Pavement ◽  
Warm Mix Asphalt ◽  
Asphalt Binders ◽  
Reclaimed Asphalt Pavement ◽  
Moisture Susceptibility ◽  
Reclaimed Asphalt ◽  
Pavement Preservation ◽  
Asphalt Overlay ◽  
Structural Capacity

A high-performance thin asphalt overlay (HPThinOL) is specified as having a thickness of 1 in. or less and is used in applications requiring high levels of rutting and fatigue resistance. HPThinOLs are used as a pavement preservation strategy and are placed on pavements that have remaining structural capacity that is expected to outlive that strategy. Current specifications for HPThinOLs generally call for a polymer-modified asphalt (PMA). However, PMA binders are more expensive than unmodified asphalt binders. This expense, coupled with the higher binder content requirement generally associated with HPThinOL, could lead to an initial higher cost in relation to other pavement preservation strategies. Although the higher initial cost can be offset by incorporating high amounts of reclaimed asphalt pavement (RAP), the use of high amounts of RAP in PMA mixtures might adversely affect the mixture performance (stiffness, cracking, or workability). Warm-mix asphalt (WMA) technology may improve the workability of HPThinOL that incorporates high RAP content and PMA binders. This study evaluated the effect of PMA binders, high RAP content, and WMA technology on the stiffness, resistance to reflective cracking, moisture susceptibility, and workability of HPThinOL mixtures. PMA binders and high RAP content increased the stiffness of HPThinOL significantly; however, the use of WMA technology lowered mixture stiffness and improved workability. PMA may improve the cracking resistance, moisture susceptibility, and rutting resistance of high-RAP HPThinOL mixtures, depending on whether a WMA technology is used.

Evaluation of a Line Laser Scanner to Improve the Measurement of Average Least Dimension in Chip Seal Design Methods

2018 ◽  
Vol 2672 (40) ◽  
pp. 59-67
Author(s):  
Sareh Kouchaki ◽  
Hossein Roshani ◽  
Jorge A. Prozzi ◽  
Cristina Cordoba ◽  
Joaquin Bernardo Hernandez
Keyword(s):  
High Speed ◽  
Laser Scanner ◽  
Preventive Treatment ◽  
Structural Condition ◽  
Application Rate ◽  
Seal Design ◽  
Chip Seal ◽  
Highly Correlated ◽  
On Chip ◽  
Aggregate Particles

Chip seal, as the most widespread pavement preventive treatment, is regularly applied on existing pavements that are still in good structural condition to increase the pavement serviceability. The most effective key parameter on chip seal performance is binder application rate, which directly governs chip seal distresses such as bleeding and raveling. How this rate is calculated mainly depends on the value of least dimension (LD) of aggregate particles. However, the available measuring methods of LD value are slow, laborious, and subjective. This study presents the development of a new high-speed line laser scanner (LLS) prototype to measure the LD value of particles more quickly and accurately. The LD values of aggregate particles were also measured using a digital caliper and considered as control data. The repeatability and reliability of the developed LLS prototype were evaluated, as well as the speed of the prototype in calculating the LD values of 100 aggregate particles. The findings indicate that the measurements of the developed prototype are highly correlated with those of the caliper. In addition, it was found that the developed prototype is efficient and capable of calculating the LD values of several particles simultaneously.

scholarly journals Interlaminar Bonding Properties on Cement Concrete Deck and Phosphorous Slag Asphalt Pavement

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1427 ◽  
Author(s):  
Guoping Qian ◽  
Shunjun Li ◽  
Huanan Yu ◽  
Xiangbing Gong
Keyword(s):  
Bridge Deck ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Fine Aggregate ◽  
Cement Concrete ◽  
Bonding Properties ◽  
The Impact ◽  
Phosphorous Slag ◽  
Bridge Deck Pavement ◽  
Concrete Deck

The slippage damage caused by weak interlaminar bonding between cement concrete deck and asphalt surface is a serious issue for bridge pavement. In order to evaluate the interlaminar bonding of cement concrete bridge deck and phosphorous slag (PS) asphalt pavement, the shear resistance properties of the bonding layer structure were studied through direct shear tests. The impact of PS as a substitute of asphalt mixture aggregate, interface characteristics, normal pressure, waterproof and cohesive layer types, temperature and shear rate on the interlaminar bonding properties were analyzed. The test results indicated that the interlaminar bonding of bridge deck pavement is improved after asphalt mixture fine aggregate was substituted with PS and PS powder, and the result indicated that the shear strength of grooved and aggregate-exposed interfaces is significantly higher than untreated interface, the PS micro-powder or anti-stripping agent can also improve the adhesion between layers when mixed into SBS asphalt. This study provided important theoretical and practical guidance for improving the shear stability of bridge deck pavement.

scholarly journals PENGARUH PENAMBAHAN LIMBAH KARET BAN LUAR PADA LAPIS TIPIS ASPAL PASIR (LATASIR) TERHADAP KARAKTERISTIK MARSHALL

2018 ◽  
Vol 2 (2) ◽  
pp. 54
Author(s):  
Fakhrul Rozi Yamali
Keyword(s):  
Coarse Aggregate ◽  
Heavy Traffic ◽  
Asphalt Mixture ◽  
Fine Aggregate ◽  
A Value ◽  
Waste Rubber ◽  
Marshall Test ◽  
Local Roads ◽  
Technical Specifications

The mixture of asphalt sand or often called as LATASIR (a thin Layer of asphalt Sand) is often used on the streets as light as local roads or road environment, in order to restrain the rate of water so as not to enter into pores in it. This mixture consists only of fine aggregate or sand or a mixture of both, so of coarse aggregate is not found in its alloy, so have the resilience of the Groove (rutting) are low and cannot be used on roads with heavy traffic or the area slopes. To improve the quality of asphalt mixture Latasir then do the addition of waste tire rubber out of the motor. This research was conducted with the marshall test asphalt plan levels, with 7%, 8%, 9%, 10% and 11% in advance. After obtained the value levels of Optimum Asphalt (KAO), then do the test with the addition of marshall rubber tyres outside the motor of 1%, 2%, 3%, 4% and 5% against weight. The research results obtained a value of 9.8%, KAO then conducted testing of marshall by using a variation of the rubber tyres outside the motor changes characteristic of Marshall, the degree of suppleness and durability is better, but there is a cavity the air that many great VIM or value, so that the value of the VFA became small. From all levels of rubber in asphalt has a great degree of flexibility in rubber 3%, but that filled the whole terms of the 2010 revision 3 technical specifications on levels of 1.5% rubber.Keywords: Latasir Mixture, KAO, Waste Rubber Tyres Outside Motor, Marshall

scholarly journals Monolayer asphalt pavement. Western requirements in Polish realities

2014 ◽  
Vol 13 (4) ◽  
pp. 153-160
Author(s):  
Piotr Koźlarek
Keyword(s):  
Road Network ◽  
Asphalt Pavement ◽  
Single Layer ◽  
Technical Condition ◽  
Traffic Load ◽  
Base Layer ◽  
Construction Time ◽  
Road Pavement ◽  
Local Roads ◽  
Base Course

Polish road network is made up of 95% local roads. Their technical condition is much worse in comparison to motorways and national roads network. The lack of financial resources is one of the main reasons for this situation. That is why there is a continuous search for technologies, that allow for fast and cheap pavement repair or modernization. The monolayer asphalt pavement is such a solution offering in addition to cost effectiveness and shorter construction time, also an increased durability. Our western neighbors developed the technical regulations for this technology under the name "Asphalttragdeckschicht" which is marked as AC 16 TD. In direct translation "Asphalttragdeckschicht" means supporting wearing course / base layer. The monolayer asphalt pavement consists of a single layer with thickness between 5 to 10 cm made of HMA that links the functions of two layers – asphalt base course and asphalt wearing course. Thanks to this, the monolayer is resistant to environmental conditions and provides an adequate bearing capacity for a given traffic load. Insufficient funding and the impossibility to put the street out of operation were the bases for the investor’s decision to build a 220m section of road pavement using the monolayer pavement technology in Pruszków near Warsaw. This project gave the possibility to learn and gain an experience with a new western technology applied to Polish reality.

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