Design and Research on the Warm-Mix Rubber-Modified Asphalt Mixture Based on the GTM Method

2012 ◽  
Vol 598 ◽  
pp. 543-551 ◽  
Author(s):  
Zheng Zhong Li ◽  
Di Wu ◽  
Xiao Yan Song ◽  
Han Zhu
Keyword(s):  
Performance Test ◽  
Design Method ◽  
Asphalt Mixture ◽  
Structure Design ◽  
Parameter System ◽  
Stage Design ◽  
Modified Asphalt ◽  
Asphalt Content ◽  
Two Parameter ◽  
Resilience Modulus

By using GTM method, with equal volume parameters as the criterion, determined the suitable temperature of Evotherm warm-mix rubber-modified asphalt mixture, and applied Marshall method for repeated experiments, holding that GTM method could increase the cooling rate. Then, it firstly proposed a two-stage design method to conduct design of warm-mix rubber-modified asphalt mixture based on the two-parameter system; on the basis of hot-mix asphalt mixture test, it carried out staged design of asphalt content and temperature to ensure the pavement performance in terms of material composition and volume parameters. Finally, the paper conducted performance test of the designed warm-mix mixture and made comparative analysis of the corresponding hot-mix mixture. The results showed that the low and high temperature performances as well as the water damage resistant performance of Evotherm warm-mix rubber-modified asphalt mixture were superior than that of hot-mix mixture, and its compression resilience modulus was roughly equal to that of the hot-mix mixture, which would not affect the pavement structure design.

Research on Proportioning Design of Tourmaline Modified Asphalt Mixture

2013 ◽  
Vol 405-408 ◽  
pp. 1928-1931 ◽  
Author(s):  
Xin Qi Wang ◽  
Biao Dong ◽  
Chao Hui Wang ◽  
Xiao Hua Wang
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Mixture Design ◽  
Mix Design ◽  
Surface Theory ◽  
Modified Asphalt ◽  
Marshall Test ◽  
Asphalt Content

In order to study the effect of tourmaline on asphalt mixture design indexes, the optimal asphalt content of modified asphalt mixture with different contents of tourmaline were determined through Marshall Test, and the variation of optimal asphalt content caused by tourmaline was analyzed. The effect of tourmaline on density, porosity, VMA, VFA, stability, flow value were studied. Under the guidance of surface theory and mortar theory respectively, the Marshall Volume indicators of tourmaline modified asphalt mixture were analyzed comparatively. A mix design method for asphalt mixture modified inorganic powder is recommended.

Performance-based mix design of unmodified and lime-modified hot mix asphalt

2012 ◽  
Vol 39 (7) ◽  
pp. 824-833 ◽  
Author(s):  
Sangyum Lee ◽  
Cheolmin Baek ◽  
Je-Jin Park
Keyword(s):  
Performance Test ◽  
Hot Mix Asphalt ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Fatigue Cracking ◽  
Mix Design ◽  
Direct Tension ◽  
Element Analysis ◽  
Asphalt Content ◽  
National Cooperative

This paper presents the performance evaluation of unmodified and lime-modified hot mix asphalt (HMA) mixtures at varying asphalt content using asphalt mixture performance test developed from National Cooperative Highway Research Program project 9-19 and 9-29 and the viscoelastic continuum damage finite element analysis. Test methods adopted in this study are the dynamic modulus test for stiffness, the triaxial repeated load permanent deformation test for rutting, and the direct tension test for fatigue cracking. The findings from this study support conventional understanding of the effects of asphalt content and lime modification on the fatigue cracking and rutting performance. Finally, the optimum asphalt content for both lime-modified and unmodified mixtures are proposed based on the knowledge gleaned from the performance-based mix design methodology. With additional validation and calibration, the comprehensive methodology described in this paper may serve as the foundation for a performance-based HMA mix design and performance-related HMA specifications.

Mix Design Method of the SMC Cold Temperature Modified Asphalt Mixture

2017 ◽  
Vol 744 ◽  
pp. 185-189
Author(s):  
Miao Miao Tian ◽  
Chao Yang Guo ◽  
Jin Yan ◽  
Ya Fei Li
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Cold Temperature ◽  
Subzero Temperature ◽  
Modified Asphalt ◽  
Harmful Emission ◽  
Long Time ◽  
Special Environment ◽  
Technology Level

The SMC cold temperature asphalt mixture consumed less energy and harmful emission compares with the traditional HMA and WMA, and it can be worked at the subzero temperature or after a long time storage, which makes the construction and maintenance of the asphalt pavement in a special environment (low temperature) and special conditions (without a hot mix station) come true. It has been widely used in Beijing, Xinjiang, Sichuan, Tibet, etc. with a satisfied performance. Highway construction and maintenance technology level of China would be positively promoted by using the SMC asphalt mixtures.

scholarly journals A Study on the Design Method for the Material Composition of Small Particle-Size Asphalt Mixture for Controlling Cracks in Asphalt Pavement

2019 ◽  
Vol 9 (10) ◽  
pp. 1988 ◽  
Author(s):  
Jiyu Xin ◽  
Jianzhong Pei ◽  
Mitsuyoshi Akiyama ◽  
Rui Li ◽  
Jiupeng Zhang ◽  
...  
Keyword(s):  
Particle Size ◽  
Crack Resistance ◽  
Small Particle ◽  
Performance Test ◽  
Design Method ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Material Composition ◽  
Asphalt Pavements ◽  
Small Particle Size

Generally, various kinds of cracks are the main type of distresses during the service period of asphalt pavements. To save maintenance costs and improve the crack resistance of asphalt pavements effectively, this paper presents a unique design method for the material composition of small particle-size (SPS) asphalt mixture for controlling cracks in asphalt pavement. First, Stone Mastic Asphalt (SMA)-II was designed as a basic gradation according to the A.N. Talbot curve and SMA-II-1, SMA-II-2 and SMA-II-3 were designed according to the Superpave mix design method, the Bailey method and the Particle interference theory, respectively. Second, based on Marshall test results, the optimal fiber content and optimal asphalt content of three gradations were determined. Then, the influence of the passing rate of 1.18-mm sieve and 0.075-mm sieve on the air voids of SMA-II and the influence of the filler-asphalt ratio on the performance of SMA-II were investigated, and an appropriate range of filler-asphalt ratio was obtained. Finally, a high-temperature performance test, a water stability test, and a skid resistance test demonstrate that the overall performance of SMA-II can satisfy the specifications. A low-temperature bend test and analysis of bending strain energy density show that SMA-II with a crumb rubber modifier and a polymer fiber has better crack resistance performance than SMA-I (SBS-modified mixture). Life-cycle cost analysis shows the economic advantage of SPS asphalt thin overlays over traditional AC-13 thin overlays.

Experimental Study on Performance of Large Stone Permeable Asphalt Mixtures

2013 ◽  
Vol 838-841 ◽  
pp. 76-79
Author(s):  
Jin Cheng Wei ◽  
Sheng Di Lu ◽  
Jin Li
Keyword(s):  
Dynamic Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Cellulose Fiber ◽  
Structure Design ◽  
Volume Index ◽  
Index Test ◽  
Modified Asphalt ◽  
Large Stone ◽  
Flexible Base

This study focused on the performance of the Large Stone Permeable Asphalt Mixture (LSPM) with neat asphalt and its feasibility to use as asphalt pavement flexible base. For comparision, LSPM mixtures were designed respectively with neat 60/70-grade asphalt and modified asphalt and the performance of LSPM was studied and compared by volume index test, draindown test, Hamburg Wheel-tracking Test and dynamic modulus test. The results showed that the performance of LSPM with modified asphalt was superior to LSPM with neat asphalt and cellulose fiber, but draindown and rutting performance of LSPM with neat asphalt met requirements of corresponding specification and dynamic modulus of LSPM with neat asphalt had the same characteristic with LSPM with modified asphalt, which proven that LSPM with neat asphalt can use as asphalt pavement flexible base by properly mix design and pavement structure design.

scholarly journals Study on Properties of Bone Glue/Polyurethane Composite Modified Asphalt and Its Mixture

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3769
Author(s):  
Wei Yan ◽  
Yangjia Ou ◽  
Jing Xie ◽  
Tuo Huang ◽  
Xinghai Peng
Keyword(s):  
Rheological Properties ◽  
Performance Test ◽  
Asphalt Mixture ◽  
High Temperature Stability ◽  
Road Engineering ◽  
Modified Asphalt ◽  
Polyurethane Composite ◽  
Sbs Modified Asphalt ◽  
Composite Modification ◽  
Bone Glue

Composite modification technology is widely used in the materials field. To enhance the property of polyurethane modified asphalt and realize its application in road engineering, the bone glue/polyurethane composite modified asphalt (CMA) was prepared using bone glue, polyurethane, and neat asphalt in this research. The bone glue content ranges 5–10%, that of the polyurethane is 1–5%. The relationship between the modifier’s content and the conventional properties and rheological properties of CMA was revealed by response surface methodology (RSM). The CMA performance was further verified under the optimal content of the bone glue and polyurethane. The differences of properties of styrene–butadienestyrene (SBS) modified asphalt mixture, neat asphalt mixture, and bone glue/polyurethane CMA mixture were compared and analyzed by using the pavement performance test. The results showed that the CMA’s conventional properties and rheological properties are improved. The optimal bone glue content and polyurethane content determined by RSM are 6.848% and 2.759%, respectively. The low-temperature crack resistance and water stability of the CMA mixture are enhanced, better than neat asphalt mixture and SBS modified asphalt mixture. The CMA mixture’s dynamic stability is 85% of SBS modified asphalt mixture, but it is 2.4 times of neat asphalt mixture. The result indicated that the bone glue/polyurethane CMA mixture still has certain advantages of high-temperature stability. In this research, the composite modification of bone glue and polyurethane can significantly enhance the characteristic of asphalt and asphalt mixture and provide a new method for applying and promoting polyurethane modified asphalt in road engineering.

Road Stress-Absorbing Interlayer Mix Design Method

2012 ◽  
Vol 490-495 ◽  
pp. 2540-2545
Author(s):  
Wen Yuan Xu ◽  
Chun Yao Deng ◽  
Hong Yu Yang
Keyword(s):  
Design Method ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Mix Design ◽  
Natural Sand ◽  
Modified Asphalt ◽  
Modified Asphalt Binder

The stress-absorbing interlayer of modified asphalt mixture studied in this report is a special asphalt pavement mixture. Capable of delaying the occurrence of reflection cracks, the asphalt mixture is mainly composed of aggregate passing through a 9.5 mm sieve, machine-made or natural sand, and modified asphalt binder.

scholarly journals Performance of Stone Mastic Asphalt Mixtures Fabricated by Different Compaction Methods

2020 ◽  
Vol 10 (7) ◽  
pp. 2523 ◽  
Author(s):  
Yingjun Jiang ◽  
Yu Zhang ◽  
Jinshun Xue ◽  
Changqing Deng ◽  
Tian Tian
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Vertical Vibration ◽  
Mastic Asphalt ◽  
Superpave Gyratory Compactor ◽  
Stone Mastic Asphalt ◽  
Road Performance ◽  
Asphalt Content ◽  
Temperature Crack

In this study, stone mastic asphalt (SMA-13) mixtures were designed using three methods, namely the vertical-vibration testing method (VVTM), Marshall method, and superpave gyratory compactor method (SGC). The performances of SMA-13 designed by all three methods were measured and compared. Results show that the optimal asphalt content of the asphalt mixture was 5% lower in the VVTM-designed SMA-13 than in the Marshall-designed and SGC-designed asphalts mixture. In comparison with the Marshall- and SGC-designed asphalts mixture, the VVTM-designed SMA-13 exhibited higher density (2.4% and 2.2% increase, respectively), mechanical properties (32% and 13% increase, respectively), high-temperature rut resistance (30% and 8% increase, respectively), low-temperature crack resistance (20% and 17% increase, respectively), water stability (4% and 3% increase, respectively), and fatigue life (at least 33% and 9% increase, respectively). The VVTM-designed SMA-13 exhibited a deeper short-term aging degree than the other SMA-13 specimens, but a smaller long-term aging degree. In summary, the SMA-13 mixture designed by the VVTM method delivered a better road performance and durability than the traditional design method, enabling improved designs of SMA mixtures.

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