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.

scholarly journals Utilisation of Waste-Based Geopolymer in Asphalt Pavement Modification and Construction—A Review

2021 ◽  
Vol 13 (6) ◽  
pp. 3330
Author(s):  
Abdalrhman Milad ◽  
Ahmed Suliman B. Ali ◽  
Ali Mohammed Babalghaith ◽  
Zubair Ahmed Memon ◽  
Nuha S. Mashaan ◽  
...  
Keyword(s):  
Asphalt Pavement ◽  
Mine Waste ◽  
Asphalt Mixture ◽  
Environmental Benefits ◽  
Engineering Properties ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Low Temperature Cracking ◽  
Pavement Construction ◽  
By Products

The use of geopolymer in pavement constructions is strongly encouraged. Many studies have demonstrated the vast potential of using industrial-by-products-based geopolymers. This paper discusses the modification of asphalt binders with geopolymers, namely geopolymer-modified asphalt (GMA) and geopolymer-modified asphalt mixture (GMAM). In addition, curing geopolymer materials, engineering properties, production techniques, and prospective utilisation in the pavement construction, such as durability and sustainability, are also discussed. The literature review showed that many industrial by-products, including red mud, blast furnace slag, fly ash, and mine waste, are used to produce geopolymers because of the metal components such as silicon and aluminium in these materials. The geopolymers from these materials influence the rheological and physical properties of asphalt binders. Geopolymers can enhance asphalt mixture performance, such as stability, fatigue, rutting, and low-temperature cracking. The use of geopolymers in asphalt pavement has beneficial impacts on sustainability and economic and environmental benefits.

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.

scholarly journals Effect of Warm-Mix Agent EC-120 on Performance of Asphalt Binder and Its Microscopic Mechanism

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Tian Xiaoge ◽  
Ren Zhang ◽  
Yichao Xv ◽  
Yantian Chu ◽  
Zhen Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Binder ◽  
Warm Mix Asphalt ◽  
Performance Tests ◽  
Mixing Process ◽  
Microscopic Mechanism ◽  
Modified Asphalt ◽  
Infrared Spectrometer ◽  
Sbs Modified Asphalt

In order to figure out the influence of the warm-mix agent EC-120 on the performance of the asphalt binder and its micro mechanism in warm-mixing process, a matrix asphalt, A-70, and SBS-modified asphalt, SBS I-D, were modified with different contents of EC-120, respectively. Then, conventional macromechanic performance tests, dynamic shear rheological (DSR) test at high-temperature, and bending beam rheological (BBR) test at low-temperature were carried out on asphalt binder samples. Meanwhile, they were microscopically analyzed through Fourier transform infrared spectrometer (FTIR) and differential scanning calorimeter (DSC). The results indicated that EC-120 can reduce the viscosity of asphalt binder at high temperature. With the increase of EC-120 content, the high-temperature rutting resistance of two kinds of warm-mix asphalt (WMA) increased, but their crack resistance at low-temperature was reduced. FTIR indicated that this is due to the generation of oxides containing carbonyl functional groups after EC-120 was blended with asphalt binder. The DSC endothermic curves of WMA binders are obviously different from those of base binders, and a strong endothermic peak appears in the interval of 102°C–113°C, indicating that EC-120 will endothermically melt at the temperature of 102°C∼113°C, so it can play the role in reducing the viscosity of asphalt binder at the range of construction temperatures.

scholarly journals Characterization of Warm Mix Agent and Its Influence on Properties of SBS-Modified Asphalt

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Jiantong Zhang ◽  
Kai Li
Keyword(s):  
Softening Point ◽  
Temperature Stability ◽  
Warm Mix Asphalt ◽  
Particle Size Analysis ◽  
Synthetic Zeolite ◽  
Size Analysis ◽  
High Temperature Stability ◽  
Performance Impact ◽  
Modified Asphalt ◽  
Sbs Modified Asphalt

Warm mix agent is the key factor to restrict the performance of warm mix asphalt. In this paper, methods of X-ray diffraction, thermal stability test, and laser particle size analysis were used to test and analyze the internal structure, composition, and properties of three kinds of warm mix agents. In order to study the performance impact of the warm mix agent on SBS-modified asphalt, the warm mix agents of Advera®, LTA synthetic zeolite, and 13X synthetic zeolite were added to SBS-modified asphalt in different contents. The three kinds of warm mix asphalt were tested by the experiments of softening point, penetration, and ductility to analyze their physical properties. The testing results showed that the softening point of three kinds of warm mix SBS-modified asphalt is greater than the softening point of SBS-modified asphalt without adding warm agents, which indicate the warm mix additives can improve the high-temperature stability of SBS-modified asphalt. The three kinds of the warm mix agent make SBS-modified asphalt hard, and the consistency and the ability of resisting deformation increase. The low temperature performance of SBS-modified asphalt decreased in different degrees with mixing different zeolite warm mix agents.

Effects of Warm Mix Asphalt (WMA) Additives on the Properties of WMA Mixtures

2013 ◽  
Vol 275-277 ◽  
pp. 2097-2102 ◽  
Author(s):  
Hong Zhu ◽  
Zhao Xing Xie ◽  
Wen Zhong Fan ◽  
Li Li Wang ◽  
Ju Nan Shen
Keyword(s):  
Dynamic Stability ◽  
Laboratory Testing ◽  
Failure Strain ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Air Voids ◽  
Modified Asphalt ◽  
Modified Binder ◽  
Bending Failure ◽  
Sbs Modified Asphalt

The objective of this research was to investigate the influence of Warm Mix Asphalt (WMA) additives on asphalt mixture properties through the laboratory testing programs such as air voids, tensile strength ratio (TSR), dynamic stability, and low temperature bending failure strain tests. The experimental design included the use of three WMA additives of Sasobit, Evotherm and Rediset, one base (unmodified) binder source, and one modified binder source. The WMA mixtures were compared to those of controls, i.e., mixtures without the additives. Results from this study showed that: (1) WMA mixtures with Rediset, Evotherm, and Sasobit had slightly higher air voids than Hot Mix Asphalt （HMA）; (2) All WMA mixtures with SBS modified asphalt have lower TSR values than the original ones. The TSR of the WMA mixtures with base (unmodified) asphalt is not significantly different from HMA; (3) The WMA mixtures with SBS modified asphalt have lower values of the dynamic stability and bending failure strain than HMA, while the WMA mixtures with base asphalt are contrary, except with Rediset additives.

scholarly journals Interlayer Working Conditions Classification and Treatment Measures of Airport Asphalt Pavement Overlay

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Hongyu Ye ◽  
Xuancang Wang ◽  
Naren Fang ◽  
Ziyuan Su ◽  
Xiaowen Sun
Keyword(s):  
Working Conditions ◽  
Asphalt Pavement ◽  
South Sudan ◽  
Modified Asphalt ◽  
Interlayer Shear ◽  
Treatment Measures ◽  
Pavement Overlay ◽  
Comprehensive Classification ◽  
Emulsified Asphalt ◽  
Sbs Modified Asphalt

The bonding strength between the overlays of an airport asphalt pavement directly affects its service life. In this study, a finite element model of asphalt overlay on airport pavement of Juba Airport in South Sudan was established, and the elastic modulus of overlay, thickness of overlay, running state of aircraft, variation trend of interlayer shear stress under the action of load and temperature were obtained. The AHP-entropy method was used to calculate the combined weight of each influencing factor. The climate in hot and humid areas was further zoned, and a comprehensive classification of airport asphalt pavement overlay between hot and humid tropics was obtained. Four interlayer treatment measures (asphalt precoating, two oils and one aggregate, geotextile, and geogrid) and three interlayer materials (SBS-modified asphalt, ordinary hot asphalt, and SBS-modified emulsified asphalt) were designed and tested. Through shear test, wheel-load fatigue test, and pressurized seepage test, the variation trends of interlayer shear, crack resistance, and waterproofing under different combination schemes were obtained. Finally, the matching relationship between different working conditions and interlayer treatment measures was established. The results show that the actual working conditions of an airport asphalt pavement can be divided into three levels. Combined with the performance ranking of different materials and interlayer treatment measures, the recommended interlayer treatment measures for comprehensive classifications I, II, and III are two oils and one material + SBS-modified asphalt, asphalt precoating, or geogrid + SBS-modified emulsified asphalt or ordinary hot asphalt, and geotextile + ordinary hot asphalt, respectively. The working conditions in Juba Airport in South Sudan can be classified as comprehensive classification II, the recommended treatment measures for geogrid + ordinary hot asphalt.

Study on Influences of Warm-Mix Agent on SBS Modified Asphalt Mixture

2013 ◽  
Vol 361-363 ◽  
pp. 1805-1810
Author(s):  
Xiao Yan Song ◽  
Yuan Yuan Li ◽  
Qiang Hua Ji
Keyword(s):  
Hot Mix Asphalt ◽  
Asphalt Mixture ◽  
Warm Mix Asphalt ◽  
Pavement Performance ◽  
Water Stability ◽  
Mixing Ratio ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Sbs Modified Asphalt ◽  
Factor G

Through conventional and unconventional tests, the influences of self-developed warm-mix agent on the performances of SBS modified asphalt are studied. The results show that the warm-mix agent has great influences on the ductility and aging quality changes of SBS modified asphalt; and the warm-mix agent can improve the asphalt rutting factor G*/sinδ and fatigue factor G* • sinδ. The mixing ratio of the warm-mix SBS modified asphalt mixture is designed based on GTM method and the pavement performance is compared and verified. The results show that: in terms of high temperature performance, the warm-mix asphalt mixture is superior to the corresponding hot-mix asphalt mixture; and in terms of low temperature performance and water stability, the former is equivalent to the latter.

Study Investigating the Influence of Warm-Mix Asphalt Additives on Rutting and Fatigue Performance of Nano-Modified Asphalt Binders

2022 ◽  
pp. 036119812110649
Author(s):  
Faheem Sadiq Bhat ◽  
Mohammad Shafi Mir
Keyword(s):  
Asphalt Binder ◽  
Warm Mix Asphalt ◽  
Fatigue Performance ◽  
Asphalt Binders ◽  
Test Results ◽  
Multiple Stress ◽  
Modified Asphalt ◽  
Creep And Recovery ◽  
Modified Asphalt Binder ◽  
Warm Mix Additives

The current study investigates the synergized effect of a nanomaterial and two warm mix additives asphalt (WMA) additives on different properties of asphalt binders. The study used an optimal percentage of 2% for nano-Al2O3; two WMA additives were used in different concentrations. The results revealed that the addition of WMA additives increased the softening point of nano-Al2O3 modified asphalt binder. Penetration and ductility results showed a decrease after the introduction of WMA additives. The viscosity of nano-Al2O3 modified asphalt binders showed a reduction after the introduction of WMA additives. Rutting evaluation was done by using the superpave rutting parameter and multiple stress creep and recovery (MSCR) test. The fatigue performance of the asphalt binders was measured using the superpave fatigue parameter and linear amplitude sweep (LAS) test. Results showed that the introduction of WMA additives improved the rutting and fatigue performance of nano-Al2O3 modified asphalt binders. The introduction of WMA additives enhanced the aging performance of the nano-Al2O3 modified asphalt binders.

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