An intensive overview of warm mix asphalt (WMA) technologies towards sustainable pavement construction

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Gautam Prakash ◽  
Sanjeev Kumar Suman
Keyword(s):  
Warm Mix Asphalt ◽  
Pavement Construction

Laboratory Evaluation of Warm-Mix Open Graded Friction Course Mixtures with Sasobit

2013 ◽  
Vol 779-780 ◽  
pp. 311-314
Author(s):  
Qi Yang Zhu ◽  
Guang Wei Hu ◽  
Ye Mao Zhang ◽  
Yuan Zhuang
Keyword(s):  
Field Trial ◽  
Warm Mix Asphalt ◽  
Laboratory Evaluation ◽  
Moisture Susceptibility ◽  
Rutting Resistance ◽  
Open Graded Friction Course ◽  
Road Project ◽  
Pavement Construction

This paper is to evaluate the feasibility of using warm mix asphalt (WMA) technology to produce quality open graded friction course (OGFC) mixtures. In the summer of 2012, a field trial project using Sasobit-OGFC was established in the Huanhu East Road project, Changzhou city. In line with the trail field project, the performances of raveling, draindown, rutting resistance and moisture susceptibility are conducted between Sasobit-OGFC mixtures and traditional HMA-OGFC mixtures. The results indicate that the mixing temperature of Sasobit-OGFC mixtures can be reduced by 20°Cwhen compared with that of HMA-OGFC mixtures. The performances of Sasobit-WMA mixtures are no worse than these of HMA-OGFC mixtures. A wider range of paving temperature is found when adding Sasobit into OGFC mixtures, which effectively enhances the quality of pavement construction.

Rheological Properties of Asphalt Binder Modified with Chemical Warm Asphalt Additive

2013 ◽  
Vol 671-674 ◽  
pp. 1692-1699 ◽  
Author(s):  
Mohd Ezree Abdullah ◽  
Kemas Ahmad Zamhari ◽  
Mustafa Kamal Shamshudin ◽  
Hainin Mohd Rosli ◽  
Mohd Khairul Idham
Keyword(s):  
Energy Consumption ◽  
Rheological Properties ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Mechanical Analysis ◽  
Warm Mix Asphalt ◽  
Dynamic Shear ◽  
Rotational Viscosity ◽  
Pavement Construction

Going towards sustainable pavement construction, asphalt industries constantly give their effort to implement Warm Mix Asphalt (WMA) by adding the chemical warm asphalt additive (CWAA). This can lower its energy consumption and pollution by reducing the mixing and compaction temperatures of the asphalt mixture without affecting its properties. Several studies have been conducted evaluating the properties of the WMA, however, little documented research on the rheology of the binders containing CWAA is available especially when dealing the sources of binders. In this paper, the tests for rheology characteristics of the Malaysian asphalt binder containing CWAA were conducted with rotational viscosity and for dynamic mechanical analysis with dynamic shear rheometer (DSR). The results of the investigation indicated that the CWAA had a significant reduction of required heat for mixing and compaction effort and also shows lower permanent deformation when compared to the control binder.

scholarly journals Warm mix asphalt mixture using modified asbuton semi extraction modify and synthetic zeolite additive

2019 ◽  
Vol 276 ◽  
pp. 03003
Author(s):  
Leo Sentosa ◽  
S Subagio Bambang ◽  
Harmein Rahman ◽  
R. Anwar Yamin
Keyword(s):  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Synthetic Zeolite ◽  
Asphalt Mixtures ◽  
Marshall Test ◽  
Asphalt Modification ◽  
Characteristic Values ◽  
Higher Temperature ◽  
Pavement Construction

Modifying asphalt aims to improve the performance of the asphalt pavement construction as indicated by increased resistance to permanent deformation and fatigue crack. Asbuton Semi Extraction is one of the materials that can be used for asphalt modification. The addition of Asbuton semi-extraction increases the value of Bitumen Stability Modulus, resistance to permanent deformation and can also increase the asphalt PG value, but require a higher temperature for mixing and compaction. The high temperatures for the manufacture of asphalt mixtures require considerable energy at a more expensive cost and will result in large emissions. The asphalt mixing technology currently being developed is Asphalt Warm Mix, that is asphalt mixture with mixing temperature below 1500°C. One method is to use zeolite additives. The asphalt mixture with the addition of synthetic zeolite can be prepared by mixing and compaction temperatures lower than 30°C of the hot mixture. From the Marshall test, it is known that zeolite addition of 0.3% of the total weight of the mixture gives the characteristic values of the asphalt mixture which still meets the requirements of the specification used. Increased zeolite levels minimize the value of mixed resistance to the immersion indicated by the IRS Marshall value.

Laboratory Investigation Effect of Warm Mix Additives on the Viscosity of SBS Modified Asphalt

2013 ◽  
Vol 448-453 ◽  
pp. 1329-1332
Author(s):  
Qi Yang Zhu ◽  
Yuan Zhuang ◽  
Guang Wei Hu ◽  
Ye Mao Zhang
Keyword(s):  
Working Conditions ◽  
Warm Mix Asphalt ◽  
Environmental Benefits ◽  
Viscosity Reduction ◽  
Engineering Properties ◽  
Mixing Performance ◽  
Modified Asphalt ◽  
Warm Mix Additives ◽  
Pavement Construction ◽  
Sbs Modified Asphalt

Warm Mix Asphalt (WMA) technology has become increasingly popular in pavement construction because of its environmental benefits and its fine engineering properties. In order to optimize mixing performance of WMA, four kinds of warm mix additives used in China were evulated by viscosity testing. Thus, this paper is mainly to reduce bitumen viscosity, which in turn improves mix workability, produces fewer emissions, and generally creates better working conditions. Results identified that the Sasobit additive has a large viscosity reduction and has a fine workability, and is appropriate for pavement construction.

Study of warm mix asphalt using reclaimed asphalt pavement and copper slag: a review

2020 ◽  
Vol 47 (4) ◽  
pp. 355-362 ◽  
Author(s):  
Ishfaq Mohi ud Din ◽  
Mohammad Shafi Mir
Keyword(s):  
Asphalt Pavement ◽  
Road Construction ◽  
Copper Slag ◽  
Warm Mix Asphalt ◽  
Environmental Benefits ◽  
Engineering Properties ◽  
Asphalt Pavements ◽  
Construction Sector ◽  
Pavement Construction ◽  
Work Done

The incorporation of copper slag (CS) in asphalt pavements proves to be a good substitute in replacing the natural aggregates. This reduces pavement construction cost and plays a key role in protecting the environment. The CS can be used with recycled asphalt pavement (RAP) material especially in warm mix asphalt pavements. The use of RAP not only leads to environmental benefits but also considerably saves natural resources and decreases the requirement to use virgin bitumen. The use of CS in pavement construction sector eliminates the disposal as well as leaching problems associated with it. This paper focuses on the review of studies carried out on the use of CS along with RAP in road construction. It presents and discusses the work done on the use of CS in the pavement construction sector and the use of RAP in providing the necessary stiffening effect to the asphalt pavements. It analyzes the requirement and advantage of using CS with RAP in asphalt pavements in light of previous research findings and its influence on various engineering properties in pavements. This paper also reviews the work done to study the environmental impact of using CS in asphalt mixes.

Prediction of Stiffness of Asphalt Treated with Surfactant-Based Warm-Mix Additive

2012 ◽  
Vol 2293 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Everett Crews ◽  
David T. Newton ◽  
Tejash Gandhi ◽  
Courtney A. Rice
Keyword(s):  
Asphalt Pavement ◽  
Laboratory Data ◽  
The United States ◽  
Warm Mix Asphalt ◽  
Asphalt Binders ◽  
Asphalt Pavements ◽  
Regression Analyses ◽  
Process Variables ◽  
Production Temperature ◽  
Pavement Construction

Although the tonnage of asphalt pavements constructed with warm-mix technologies has increased rapidly in the United States in recent years, some practical aspects of warm-mix asphalt pavement construction remain incompletely defined. For example, compaction temperatures for many warm-mix technologies cannot be estimated with the standard equiviscous methods common to hot-mix asphalt. This paper reports the preliminary results of research to develop a method for predicting the stiffness (G*/sin δ) of binder treated with a surfactant-based warm-mix additive as a function of mix production temperature, mix storage and haul time, and warm-mix additive dosage. Asphalt binders were treated in the laboratory with 0.0%, 0.5%, and 1.0% of surfactant-based warm-mix additive and were heated in a rolling thin-film oven at 130°C, 145°C, and 163°C for 0, 25, 55, 85, and 115 min. Regression analyses of the laboratory data yielded equations that with good fit correlated binder stiffness with the formulation (dosage) and process variables (aging temperature and time). The predictive value of these laboratory-developed equations was found to be good when the measured stiffness of binder extracted from field mix obtained at the paver was compared with binder stiffness calculated with the laboratory-developed equations by using the plant mix temperature, total storage and haul time, and surfactant dosage.

Variation of Asphalt Requirement and Strength Properties among Hot Mix (HMA) and Warm Mix (WMA) Asphalt Concrete

2020 ◽  
Vol 27 (2) ◽  
pp. 24-33
Author(s):  
Zainalabidine Nihad ◽  
Saad Issa Sarsam
Keyword(s):  
Asphalt Concrete ◽  
Research Work ◽  
Strength Properties ◽  
Warm Mix Asphalt ◽  
Indirect Tensile ◽  
Asphalt Content ◽  
Pavement Construction ◽  
The Stability ◽  
Marshall Stability ◽  
Emulsified Asphalt

Due to the restrictions for protecting the environment, and the requirements to reduce fuel consumption, research work was started globally for verifying the possibility of implementation of warm mix asphalt (WMA) in pavement construction. Warm mix asphalt enables the production and compaction of asphalt concrete mixtures at temperatures (20-30 °C) lower than that of traditional hot mix asphalt (HMA). In this investigation, two WMA mixtures have been prepared in the laboratory using medium curing cutback (MC-30) and Cationic emulsion. HMA mixture was also prepared for comparison. Marshall specimens of (101.6 mm) in diameter and (63.5 mm) in height were constructed form the mixtures and subjected to indirect tensile strength (ITS) test, Marshall Stability, flow and volumetric properties determination. Test results were analyzed and compared. It was concluded that the stability of WMA is higher than HMA by 17 % and 47.87 % for (cutback and emulsified asphalt) WMA respectively, while the WMA exhibit lower flow than HMA by 34.67 % and 1.33 % when using (cutback and emulsion) WMA respectively. The optimum asphalt content was (20.69 and 32.35) % higher for (cutback and emulsion) WMA than that of HMA. The (ITS) at 25 ⁰C decreases by (28.58 and 4.51) % when the asphalt content increased and decreased by 0.5 % from optimum asphalt content (OAC) for WMA- emulsion asphalt.

Laboratory Investigation of Pavement Performance of Warm Mix Asphalt with Different Addition Methods

2013 ◽  
Vol 734-737 ◽  
pp. 2292-2297
Author(s):  
Qi Yang Zhu ◽  
Ye Mao Zhang ◽  
Guang Wei Hu ◽  
Yuan Zhuang
Keyword(s):  
Warm Mix Asphalt ◽  
Slight Reduction ◽  
Water Stability ◽  
Moisture Susceptibility ◽  
Rutting Resistance ◽  
Dry Process ◽  
Significant Difference ◽  
Low Temperature Cracking ◽  
Road Project ◽  
Pavement Construction

Warm Mix Asphalt (WMA) technology is increasingly popular in pavement construction. In the summer of 2012, a field trial project using Sasobit-WMA was established in the Huanhu East Road project, Changzhou city. In line with this trail field project, two addition ways of Sasobit were discussed to evaluate pavement performances in terms of workability, rutting resistance, low-temperature cracking and moisture susceptibility. Results identifies that the Sasobit-WMA has benefits of the workability, rutting resistance over the HMA. Although reduced anti-cracking and water stability performances occurred for the WMA, there is no significant difference between them. For Sasobit addition ways, the dry process has an easier workability and a better anti-rutting performance than those of the wet processes. Compared with the wet processes, the dry process has a slight reduction on anti-cracking and water stability performances. However, these reduction are under the control of specifications and also suitable for pavement construction.

Effect of aggregate gradation on permanent deformation behavior of a warm mix asphalt

2016 ◽  
Vol 58 (7-8) ◽  
pp. 678-688 ◽  
Author(s):  
Ebrahim Sangsefidi ◽  
Ali Mansourkhaki ◽  
Hasan Ziari
Keyword(s):  
Deformation Behavior ◽  
Permanent Deformation ◽  
Warm Mix Asphalt ◽  
Aggregate Gradation
Sign in / Sign up

Export Citation Format

Share Document