scholarly journals Influence of Hydrated Lime on the Properties and Permanent Deformation of the Asphalt Concrete Layers in Pavement

2015 ◽  
Vol 4 (1) ◽  
pp. 1-19 ◽  
Author(s):  
Ahmed F. Al-Tameemi ◽  
Yu Wang ◽  
Amjad Albayati
Keyword(s):  
Asphalt Concrete ◽  
Raw Materials ◽  
Permanent Deformation ◽  
Fatigue Cracking ◽  
Hydrated Lime ◽  
Concrete Pavement ◽  
Partial Replacement ◽  
Repeated Loading ◽  
Concrete Mixtures ◽  
Asphalt Concrete Pavement

Abstract Flexible or asphalt concrete pavement is the paving system most widely adopted all over the world. It has been recognized that there are many different types of the factors affecting the performance and durability of asphalt concrete pavement, including the service conditions, such as: the variation of temperature from mild to extremes and the repeated excessive axle loading as well as the inadequate quality of the raw materials. All of these when combined together are going to accelerate the occurrence of distresses in flexible pavement such as permanent deformation and fatigue cracking. As the result, there has an urgent need to enhance the ability of asphalt concrete mixture to resist distresses happened in pavement. Use of additives is one of the techniques adopted to improve pavement properties. It has been found that hydrated lime might be one of the effective additives because it is widely available and relatively cheap compared to other modifiers like polymers. This paper presents an experimental study of the hydrated-lime modified asphalt concrete mixtures. Five different percentages of the hydrated lime additive were investigated, namely (1, 1.5, 2, 2.5 and 3 percent). The hydrated lime additive was used as partial replacement of limestone filler by total weight of the aggregate. The designed Hot Mix Asphalt (HMA) concretes are for the application of three pavement courses, i.e. Surface, Leveling and Base. These mixtures are designed and tested following Marshall procedure and uniaxial repeated loading to evaluate permanent deformation at different temperatures of 20°C, 40°C and 60°C. The experimental results show that the addition of hydrated lime as a partial replacement of ordinary limestone mineral filler results a significant improvement on mechanical properties and the resistant to permanent deformation of the designed asphalt concrete mixtures.

scholarly journals Effect of Hydrated Lime on Indirect Tensile Stiffness Modulus of Asphalt Concrete Produced in Half-Warm Mix Technology

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4731
Author(s):  
Mateusz M. Iwański
Keyword(s):  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Active Agent ◽  
Hydrated Lime ◽  
Partial Replacement ◽  
Stiffness Modulus ◽  
Limestone Filler ◽  
Tensile Stiffness ◽  
Lime Content ◽  
Indirect Tensile

Half-warm mix asphalt (HWMA) mixtures can be produced at temperatures ranging from 100 °C to 130 °C, depending on the production methods used. The lowest mixing temperature can be achieved by using water-foamed bitumen. The mixture should be characterized by a long service life, defined by the resistance to permanent deformation and high stiffness modulus at temperatures above zero. It is therefore important to ensure the adequately high quality of the bitumen binder. Bitumen 50/70 was provided with appropriate quality foaming characteristics (expansion ratio, ER, half-life, t1/2) by adding a surface-active agent (SAA) at 0.6 wt % before foaming. Then asphalt concrete (AC) 8 S was designed and produced with the recommended water-foamed binder. Hydrated lime, an additive substantially affecting asphalt concrete mechanical parameters, was used at 0, 15, 30, and 45 wt % as a partial replacement for the limestone filler. The influence of the amount of hydrated lime on the content of voids, indirect tensile stiffness modulus at −10 °C, 0 °C, +10 °C, +20 °C, and +30 °C, and the resistance to permanent deformation was investigated. Statistical analysis of the test results showed the quantity of 30% to be the optimum hydrated lime content. The AC 8 S resistance to permanent deformation was determined at the optimum hydrated lime content. The comprehensive evaluation revealed a synergistic effect between bitumen 50/70, modified before foaming with 0.6 wt % SAA and 30 wt % hydrated lime as the limestone filler replacement, and the half warm mixture AC 8 S, in terms of the standard requirements and durability of the HWMA concrete in pavement applications.

scholarly journals THERMAL CONDITIONS OF ROAD PAVEMENTS AND THEIR INFLUENCE ON MOTOR TRAFFIC

Transport ◽  
2003 ◽  
Vol 18 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Alfredas Laurinavičius ◽  
Donatas Ďygas
Keyword(s):  
Asphalt Concrete ◽  
Thermal Conditions ◽  
Climatic Conditions ◽  
Concrete Pavement ◽  
Concrete Pavements ◽  
Road Asphalt ◽  
Concrete Mixtures ◽  
Research Findings ◽  
The Republic ◽  
Asphalt Concrete Pavement

The article presents the analysis of climatic conditions in the Republic of Lithuania and describes their influence on road asphalt concrete pavement. Dependence of the main properties of asphalt concrete mixtures on tempera~re is described with the help of carried out experiments. Research findings show that the probability of plastic defomations (rutting and corrugation) in asphalt concrete pavement is higher when the pavement temperature IS 20-40 C. Ptactical application of the presented conclusions and recommendations will enable to reduce the occurrence of undesirable deformations in asphalt concrete pavements and to improve traffic conditions on the roads.

scholarly journals Study on Construction Quality Management of Expressway Asphalt Concrete Pavement

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Zhao Zhijiang
Keyword(s):  
Quality Management ◽  
Asphalt Concrete ◽  
Raw Materials ◽  
Concrete Pavement ◽  
Construction Quality ◽  
Branch Line ◽  
Resistance Durability ◽  
Asphalt Concrete Pavement

Abstract: The highway has been growing with the development of China's economy and among which asphalt concrete pavement is widely used in highway construction with its many advantages such as good slip resistance, durability, surface smoothness, strength, stability and easy maintenance. This paper takes the highway construction of Yunfu to Zhanjiang section of the Shan-Zhan Expressway and branch line of the LM10 contract section as an example to explore the quality of raw materials, construction quality and other aspects of asphalt concrete pavement. It is hoped that it will help to promote the construction quality of asphalt concrete pavement.

Performance Evaluation of Plant Produced Warm Mix Asphalt

2018 ◽  
Vol 24 (5) ◽  
pp. 145 ◽  
Author(s):  
Amjad H. Albayati
Keyword(s):  
Portland Cement ◽  
Asphalt Concrete ◽  
New Technology ◽  
Permanent Deformation ◽  
Performance Testing ◽  
Hydrated Lime ◽  
Warm Mix Asphalt ◽  
Load Test ◽  
Concrete Mixtures ◽  
Limestone Dust

Warm mix asphalt (WMA) is relatively a new technology which enables the production and compaction of asphalt concrete mixtures at temperatures 15-40 °C lower than that of traditional hot mix asphalt HMA. In the present work, six asphalt concrete mixtures were produced in the mix plant (1 ton each) in six different batches. Half of these mixes were WMA and the other half were HMA.  Three types of fillers (limestone dust, Portland cement and hydrated lime) were used for each type of mix. Samples were then taken from these patches and transferred to lab for performance testing which includes: Marshall characteristics, moisture susceptibility (indirect tension test), resilient modulus, permanent deformation (axial repeated load test) and fatigue characteristics (third point flexural beam test). The obtained results indicated that the performance of WMA is enhanced when using the hydrated lime as filler in comparison with the limestone dust and Portland cement fillers. Better fatigue life was obtained for WMA using hydrated lime filler in comparison with HMA. Regardless the filler type, the Marshall properties of WMA satisfy the requirement of local specification, other properties of WMA were relatively lower than the HMA.  

MARSHALL TEST CHARACTERISTICS OF ASPHALT CONCRETE MIXTURE WITH SCRAPPED TIRE RUBBER AS A FINE AGGREGATE

2017 ◽  
Vol 79 (2) ◽  
Author(s):  
Gito Sugiyanto
Keyword(s):  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Tire Rubber ◽  
Test Characteristics ◽  
Concrete Mixtures ◽  
Fine Aggregates ◽  
Marshall Test ◽  
Asphalt Content

Highways are important transportation infrastructures that influence economy, culture, and security. Most of the highways in Indonesia are flexible pavement that use asphalt as a binder. The use of scrapped tire rubber as a partial replacement of fine aggregates is based on the limited available natural aggregate in nature. Utilization of scrapped tire rubber as a fine aggregate is one of the alternatives for reducing environmental pollution and supporting Clean Development Mechanism program. The aim of this study is to analyze the Marshall test characteristics of asphalt concrete (AC) mixture that use scrapped tire rubber as a partial substitute of fine aggregate and comparing with a standard mixture. Laboratory tests are performed on three different types of mixtures as follows the mix without scrapped tire rubber, mix containing 50%, and 100% substitution of aggregate at fraction of No.50 with scrapped tire rubber. The test, it show that optimum asphalt content for ACStandard mixture is 6.76%, while ACScrapped-tire 50% mixture is 7.04% and ACScrapped-tire 100% mixture is 6.25%. The use of scrapped tire rubber in asphalt concrete mixtures can improve the resistance to permanent deformation and resistance to water. The use of scrapped tire rubber is acceptable as a partial replacement of aggregate in asphalt concrete mixtures.  

Research on Asphalt Concrete Pavement Edge Molding Machine with Intelligent and Automatic

2014 ◽  
Vol 971-973 ◽  
pp. 1125-1128 ◽  
Author(s):  
Gen Li Shan ◽  
Yao Zhen Liu
Keyword(s):  
Control System ◽  
Asphalt Concrete ◽  
Raw Materials ◽  
Concrete Pavement ◽  
Pneumatic System ◽  
Molding Machine ◽  
The Road ◽  
Asphalt Concrete Pavement ◽  
Side Mode

This paper designs an intelligent automatic mounting machine . For the purpose of reducing the steps of remodeling of excess asphalt and saving asphalt concrete . Before paving mixing , it laid two rows of fixed and adjustable thickness of the side-mode and mold clamp on both sides of the road . The results show that it avoids the process of removing the extra asphalt, saving raw materials, improving the efficiency of the paving . Mainly describe control system , especially pneumatic system.

Research on anti-fatigue ability of Sisal Fiber Asphalt Mixture Pavement

2013 ◽  
Vol 405-408 ◽  
pp. 1782-1785
Author(s):  
Zi Ye He ◽  
Fu Xue Liu
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Fatigue Cracking ◽  
Concrete Pavement ◽  
Pavement Performance ◽  
Sisal Fiber ◽  
Viscoelastic Parameters ◽  
Cracking Performance ◽  
Asphalt Concrete Pavement

Fatigue crack is one of the main road damage forms of asphalt pavement structure, and serious impact the asphalt pavement performance and service life. Asphalt mixture has typical viscoelastic,and can get Burgers model and viscoelastic parameters form creep test. Using finite element method of fracture mechanics, simulation under dynamic loading, research crack extending behavior of common asphalt concrete pavement and mixed with 0.2% of sisal fiber asphalt concrete pavement. From the results, it can find out that when mixed with sisal fiber, the anti-fatigue cracking performance is obvious enhancement.

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