Utilization of Waste Rubber Powder in Semi-Flexible Pavement

2014 ◽  
Vol 599 ◽  
pp. 361-367 ◽  
Author(s):  
Chong Huang ◽  
Jin Xiang Hong ◽  
Jun Tao Lin ◽  
Cheng Deng ◽  
Lin Li
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Flexible Pavement ◽  
Performance Tests ◽  
Major Purpose ◽  
Rubber Powder ◽  
Waste Rubber ◽  
Cracking Performance ◽  
Low Temperature Cracking ◽  
Waste Rubber Powder

The central concept of semi-flexible pavement (SFP) is to combine the best qualities of concrete and asphalt pavement by means of filling the voids of the large gap asphalt mixture (LGAM) with good fluidity grout. The major purpose of this study is to determine the feasibility of utilizing waste rubber powder in the grout so as to reduce the stiffness of the semi-flexible pavement. In this paper, seven kinds of grout were prepared by adding different volume dosage of the waste rubber powder and seven kinds of SFP were also prepared. By means of rutting, dynamic elastic modulus and low-temperature cracking performance tests, the performances of SFP were compared. The experimental results illustrated that the waste rubber powder was suitable to the semi-flexible pavement material. With the dosage of rubber powder increased, the anti-rutting, dynamic modulus of SFP decreased, but the low-temperature cracking of SFP was improved. Preferably, the volume dosage of the waste rubber powder should be not more than 20%.

scholarly journals Research on the Influence of Nanocarbon/Copolymer SBS/Rubber Powder Composite Modification on the Properties of Asphalt and Mixtures

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Wenhui Zhao ◽  
Xiangbing Xie ◽  
Guanghui Li ◽  
Jiuguang Geng ◽  
Meng Bao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Powder Composite ◽  
High Temperature Stability ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Modification Process ◽  
Low Temperature Cracking ◽  
Surface Modified

To expand the application range of modified asphalt and mixtures and effectively reduce the aggregation of nanomaterials in asphalt, nanocarbon/styrene butadiene styrene (SBS)/rubber powder composite-modified asphalt is proposed. This paper presents a laboratory study on the performance of nanocarbon/copolymer SBS/rubber powder composite-modified asphalt, and nanocarbon particles modified by titanate coupling agents as modifiers are selected. The nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was prepared by a high-speed shearing method. The physical properties and rheological performance were assessed using ductility tests, softening point tests, penetration tests, dynamic shear rheometer (DSR) tests, and bending beam rheometer (BBR) tests. Furthermore, the mixture properties, including the high-temperature stability, low-temperature cracking resistance, moisture stability, and freeze-thaw splitting, were evaluated in the laboratory. The micromorphology of the base asphalt and composite-modified asphalt was examined by scanning electron microscopy (SEM), and the reactions between the modifiers and AH-70 base asphalt were studied by Fourier transform infrared spectroscopy (FTIR). The results reveal that the surface-modified nanocarbon and rubber powder additives substantially increased the softening point and penetration index of the base asphalt, with little obvious influence on the low-temperature performance. In addition, when nanocarbon/copolymer SBS/rubber powder composite-modified asphalt was used, the high-temperature stability and low-temperature cracking resistance of the nanocarbon/copolymer SBS/rubber powder composite-modified asphalt mixture were approximately 1.3 times those of the nanocarbon/rubber powder asphalt mixture. In terms of the micromorphology and reaction, the addition of the nanocarbon can increase the compatibility between the base asphalt and rubber powder, and then the addition of copolymer SBS can improve the structure of nanocarbon (after surface modification)/rubber powder-modified asphalt to form a stable network. Moreover, the physical reaction plays the dominant role in the modification process for the rubber powder and base asphalt, and chemical reactions occur in the modification process for the surface-modified nanocarbon and base asphalt.

Development and material properties of reinforced plywood using carbon fiber and waste rubber powder

2016 ◽  
Vol 39 (3) ◽  
pp. 675-680 ◽  
Author(s):  
Alireza Ashori ◽  
Mohammad Ghofrani ◽  
Mohammad Hadi Rezvani ◽  
Nadir Ayrilmis
Keyword(s):  
Carbon Fiber ◽  
Material Properties ◽  
Rubber Powder ◽  
Waste Rubber ◽  
Waste Rubber Powder

Recovery of some metal ions using gamma-radiation induced grafted waste rubber powder

1998 ◽  
Vol 238 (1-2) ◽  
pp. 43-51 ◽  
Author(s):  
E. M. Abdel-Bary ◽  
A. M. Dessouki ◽  
E. M. El-Nesr ◽  
M. M. Hassan
Keyword(s):  
Gamma Radiation ◽  
Metal Ions ◽  
Rubber Powder ◽  
Waste Rubber ◽  
Radiation Induced ◽  
Waste Rubber Powder

scholarly journals Fatigue Resistance and Cracking Mechanism of Semi-Flexible Pavement Mixture

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5277
Author(s):  
Shiqi Wang ◽  
Huanyun Zhou ◽  
Xianhua Chen ◽  
Minghui Gong ◽  
Jinxiang Hong ◽  
...  
Keyword(s):  
Low Temperature ◽  
Fatigue Resistance ◽  
Stress Ratio ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Fatigue Cracking ◽  
Flexible Pavement ◽  
The Poor ◽  
Grouting Material ◽  
Cracking Mechanism

Semi-flexible pavement (SFP) is widely used in recent years because of its good rutting resistance, but it is easy to crack under traffic loads. A large number of studies are aimed at improving its crack resistance. However, the understanding of its fatigue resistance and fatigue-cracking mechanism is limited. Therefore, the semi-circular bending (SCB) fatigue test is used to evaluate the fatigue resistance of the SFP mixture. SCB fatigue tests under different temperature values and stress ratio were used to characterize the fatigue life of the SFP mixture, and its laboratory fatigue prediction model was established. The distribution of various phases of the SFP mixture in the fracture surface was analyzed by digital image processing technology, and its fatigue cracking mechanism was analyzed. The results show that the SFP mixture has better fatigue resistance under low temperature and low stress ratio, while its fatigue resistance under other environmental and load conditions is worse than that of asphalt mixture. The main reason for the poor fatigue resistance of the SFP mixture is the poor deformation capacity and low strength of grouting materials. Furthermore, the performance difference between grouting material and the asphalt binder is large, which leads to the difference of fatigue cracking mechanism of the SFP mixture under different conditions. Under the fatigue load, the weak position of the SFP mixture at a low temperature is asphalt binder and its interface with other materials, while at medium and high temperatures, the weak position of the SFP mixture is inside the grouting material. The research provides a basis for the calculation of the service life of the SFP structure, provides a reference for the improvement direction of the SFP mixture composition and internal structure.

AYMA: Mechanistic Probabilistic System To Evaluate Flexible Pavement Performance

1998 ◽  
Vol 1629 (1) ◽  
pp. 137-148 ◽  
Author(s):  
Manuel Ayres ◽  
Matthew W. Witczak
Keyword(s):  
Low Temperature ◽  
Mechanistic Model ◽  
Permanent Deformation ◽  
Probabilistic Approach ◽  
Fatigue Cracking ◽  
Flexible Pavement ◽  
Analysis And Design ◽  
Mechanistic Approach ◽  
Low Temperature Cracking ◽  
User Friendly

A new rational mechanistic model for analysis and design of flexible pavement systems has been developed. Furthermore, a fundamental probabilistic approach was incorporated into this system to account for the uncertainty of material and environmental conditions. The system was integrated in a user-friendly Windows program with a variety of user-selected options that include widely used models and those recently developed in the Strategic Highway Research Program project. Three basic types of distress can be investigated separately or all together, including fatigue cracking, permanent deformation, and low-temperature cracking. The mechanistic approach makes use of the JULEA layered elastic analysis program to obtain pavement response. The system provides optional deterministic and probabilistic solutions, accounts for aging and temperature effects over the asphalt materials, variable interface friction, multiple wheel loads, and user-selected locations for analysis. Tabular and graphical results provide expected distress values for each month as well as their variability, probability of failure, and assessment of the overall reliability of the pavement relative to each type of distress for a user-selected failure criterion. Only the load-associated module of AYMA is presented; a separate work describes the low-temperature cracking analysis.

Grafting waste rubber powder and its application in asphalt

2021 ◽  
Vol 271 ◽  
pp. 121881
Author(s):  
XiaoPing Wang ◽  
Li Hong ◽  
HaiJian Wu ◽  
HuiLin Liu ◽  
DeMing Jia
Keyword(s):  
Rubber Powder ◽  
Waste Rubber ◽  
Waste Rubber Powder

Influence Analysis of Performance on Sasobit Warm Mix Asphalt with Salinity

2014 ◽  
Vol 490-491 ◽  
pp. 138-141
Author(s):  
Kun Wang ◽  
Jing Ya Chen ◽  
Xiang Qu
Keyword(s):  
Low Temperature ◽  
Environmental Benefits ◽  
Fatigue Performance ◽  
Test Results ◽  
Temperature Performance ◽  
Cracking Performance ◽  
Low Temperature Cracking ◽  
Short And Long Term ◽  
Analysis Of Performance

Sasobit warm mix drainage asphalt pavement has become increasingly popular due to its environmental benefits and comfortable using effect. However, test results show that its low-temperature and anti-fatigue performance have a certain degree of reduced. To improve the performance of asphalt four different doses (1%, 3%, 5% and 7%) of salt are added to the Sasobit asphalt. Laboratory tests were used to simulate short and long term aging asphalt in the process of construction and using pavement. A series of binder tests including bending beam rheometer (BBR), dynamic shear rheometer (DSR) and Brookfield viscosity tests were conducted. Results show an increase of rutting performance for warm mix binders with Sasobit while asphalt with salt has similar high temperature performance to original asphalt. Unlike Sasobit which has a decrease of cracking performance for asphalt at low-temperature, salinity can greatly improve the Low-temperature performance. And the low-temperature cracking performance and anti-fatigue performance presents a tendency of climbing up first and then declining with the increase of salinity. The figure of viscosity-temperature curve shows that the optimum of salinity is 5%.Further more, asphalt with Sasobit and salt can gain better performance and same mixing and compaction effect in lower 20°C than hot mix asphalt without it.

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