Study on the Influence of Asphalt Performance for Ultraviolet Aging

2014 ◽  
Vol 1065-1069 ◽  
pp. 798-801
Author(s):  
Song Ye ◽  
Mi Rui Ge ◽  
Bin Guo
Keyword(s):  
Ultraviolet Light ◽  
Modified Asphalt ◽  
Asphalt Performance ◽  
Ultraviolet Aging

In order to study the influence of ultraviolet aging on the performance of different asphalt, we select two kinds of matrix asphalts of the same symbol and two kinds of modified asphalts of the same brand which are used widely in our country. After ultraviolet aging in different time, we use the samples to do the experiments of three indicators and DSR. The results show that the data of the modified asphalts after ultraviolet aging is more stable. Under the irradiation of ultraviolet light,the performance of modified asphalt is more stable.

Property of Anti-Ultraviolet Aging of LDHs Modified Asphalt

2018 ◽  
Vol 33 (3) ◽  
pp. 634-638 ◽  
Author(s):  
Hechuan Li ◽  
Jianying Yu ◽  
Shaopeng Wu ◽  
Ling Pang ◽  
Yuanyuan Li ◽  
...  
Keyword(s):  
Modified Asphalt ◽  
Ultraviolet Aging

Compound Modified Asphalt Performance Research

2012 ◽  
Vol 446-449 ◽  
pp. 454-457
Author(s):  
Wen Yi ◽  
Huai Wei Hu ◽  
Yong He Wang ◽  
Chang Zi Qu
Keyword(s):  
Modified Asphalt ◽  
Asphalt Performance ◽  
Performance Research

scholarly journals Resistance to Ultraviolet Aging of Nano-SiO2 and Rubber Powder Compound Modified Asphalt

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5067 ◽  
Author(s):  
Guoping Qian ◽  
Changdong Yang ◽  
Haidong Huang ◽  
Xiangbing Gong ◽  
Huanan Yu
Keyword(s):  
Uv Light ◽  
Temperature Property ◽  
Uv Aging ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Nano Sio2 ◽  
Aging Property ◽  
Compound Modification ◽  
Ultraviolet Aging ◽  
Low Temperature Property

Ultraviolet (UV) aging degrades the life span of asphalt pavement, nanomaterials used as modifiers exhibit good shielding function on UV light, but generally degrade the low-temperature property of asphalt, a compound modification was found to be a solution. In this study, nano-SiO2 and rubber powder were blended together with base asphalt to prepare compound modified asphalt. Compound modified asphalt with different blending dosages were subjected to UV light via a self-made UV aging simulation chamber. Basic performance tests and rheological tests were conducted including the UV aging influence. An optimum compound ratio was finally recommended based on the goal to remove the adverse effect of nano-SiO2 on the thermal cracking. Results show that the anti-UV aging property of asphalt is improved obviously due to the blocking function of nano-SiO2 and carbon black in rubber powder, and the enhancing effect of nano-SiO2 is found to be the most significant.

EVALUATION OF NORMAL AND MODIFIED ASPHALT ACCORDING TO CONVENTIONAL AND MODERN GRADING SYSTEMS

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Maram Saudy ◽  
Safwan Khedr
Keyword(s):  
High Performance ◽  
High Reliability ◽  
Grading System ◽  
Modified Asphalt ◽  
Grading Systems ◽  
Asphalt Performance ◽  
Grading Standards ◽  
High Level ◽  
Maintenance Requirements ◽  
Different Sources

Asphalt plays a significant role in pavement quality. The need for high-performance pavements with long service life and low maintenance requirements is the motive behind thorough research and studies of asphalt characteristics. This research focuses on studying all sources of Egyptian asphalt over a span of time using both conventional and Superpave grading techniques in order to characterize asphalt performance and also to answer the question whether the Egyptian asphalts need modification. The results of this research indicate that all Egyptian normal (virgin) 60/70 asphalt samples from different sources failed to meet penetration grading requirements, viscosity grading standards AC-20 (high quality); with minor exceptions, viscosity grading system AC-20 (low quality), and both AR-8000 and AR-1000 Aged Residue grading systems. When Superpave grading system was employed, results indicate that all normal asphalt samples failed to meet the basic requirements (without traffic adjustment) according to the Egyptian climatic requirements for high reliability projects (PG70-10 and PG76-10). The testing results accommodate Superpave requirements for lower levels of reliability and/or lower level of conservativeness. This emphasizes the flexibility and reliability of Superpave grading system as compared to conventional grading systems. On the other hand all modified asphalt samples, using an SBS modifier, passed according to the base high reliability projects and/or high level of conservativeness requirements of the Superpave grading system. Finally it is concluded that Egyptian asphalt should be modified in order to provide satisfactory performance especially for high reliability projects in hot regions with high and/or slow traffic.

scholarly journals Swelling and Degradation Characteristics of Crumb Rubber Modified Asphalt during Processing

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Caiyun Xia ◽  
Mingyuan Chen ◽  
Jiuguang Geng ◽  
Xiaofeng Liao ◽  
Zhongda Chen
Keyword(s):  
Crumb Rubber ◽  
Continuous Phase ◽  
Expansion Ratio ◽  
Processing Technology ◽  
Processing Temperature ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Relationship Model ◽  
Long Time ◽  
Asphalt Performance

The existence of cross-linked structure in crumb rubber modified asphalt (CRMA) leads to the complexity of its system. According to the preparation test of CRMA under different processing technology, the influence of processing temperature and time on the properties and cross-linking structure of CRMA was analyzed. By analyzing the volume expansion rate of the rubber powder after swelling and the toluene insoluble content attenuation rate, the formation conditions of the macro-level cross-linked structure were determined, and the relationship model between the cross-linked structure and the rubber asphalt performance was established. The results show that the rubber particles can form a continuous phase structure after swelling. At this time, the expansion ratio of the swollen rubber powder was 1.76–2.14. Too high temperature (above 200°C) and too long time (above 60 min) caused serious degradation of rubber. The suitable processing technology was stirring at 180–190°C for 45–60 min.

scholarly journals Study on Conventional and Rheological Properties of Corn Stalk Bioasphalt/PPA Composite Modified Asphalt

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Fuhai Wang ◽  
Tuo Huang ◽  
Gongfeng Xin ◽  
Minghao Mu ◽  
Quanjun Shen
Keyword(s):  
High Temperature ◽  
Asphalt Binder ◽  
Waste Utilization ◽  
Temperature Behavior ◽  
Corn Stalk ◽  
Modified Asphalt ◽  
Infrared Reflection ◽  
Negative Effect ◽  
New Type ◽  
Asphalt Performance

As a new type of pavement material, bioasphalt has received more and more attention. However, the high-temperature behavior of bioasphalt is poor after blending with asphalt binder. In order to solve this problem and facilitate the waste utilization and resource conservation, the corn stalk bioasphalt/PPA composite modified asphalt was proposed. The conventional performance tests and rheological tests were conducted to evaluate high-temperature and low-temperature behavior. Fourier transform infrared reflection (FTIR) test was undertaken to analyze the mechanism of modified asphalt. The results indicated that blended asphalt penetration and ductility gradually decrease with the PPA content increasing. The softening point and viscosity of the modified asphalt increased, which led to an improvement of blended asphalt’s rigidity. The PPA increased the rutting index of corn stalk bioasphalt/PPA composite modified asphalt. However, bioasphalt had a negative effect on its high-temperature performance. The corn stalk bioasphalt/PPA composite modified asphalt could meet the specification requirement at −18°C considering the creep rate and stiffness modulus, indicating it had outstanding crack resistance. When the PPA and bioasphalt respect to the weight of neat asphalt were 6%–8% and 10%–16%, respectively, the corn stalk bioasphalt/PPA composite modified asphalt performance was optimal. However, shear time and shear rate merely affected the proposed modified asphalt performance. The bioasphalt did not affect the chemical structure of asphalt. However, PPA generated new functional groups (P-O single bond, phosphate (RO)3P = O, and P=O double bond) causing a chemical modification in the asphalt binder. This study can provide a basis for applying bioasphalt, making road engineering more economical and environmentally friendly.

Analysis on Property Changes of Neat and Modified Asphalt under Ultraviolet Aging

2008 ◽  
Author(s):  
Jiani Wang ◽  
Yiqiu Tan ◽  
Zhongjun Xue ◽  
Zhongliang Feng ◽  
Huining Xu
Keyword(s):  
Modified Asphalt ◽  
Property Changes ◽  
Ultraviolet Aging

Study on Anti-Ultraviolet Radiation Aging Property of TiO2 Modified Asphalt

2011 ◽  
Vol 306-307 ◽  
pp. 951-955 ◽  
Author(s):  
Shi Shuang Sun ◽  
Yan Min Wang ◽  
Ai Qin Zhang
Keyword(s):  
Ultraviolet Radiation ◽  
Ultraviolet Light ◽  
Softening Point ◽  
Radiation Environment ◽  
Modified Asphalt ◽  
Performance Indexes ◽  
Before And After ◽  
Aging Property ◽  
Modify Asphalt

In order to decrease the disadvantageous effect of ultraviolet light to asphalt, nano-scaled TiO2 was selected as modifier to modify asphalt. The photooxidation properties of the modified asphalt were examined in a home-made ultraviolet radiation environment box. By comparing the before and after performance indexes of asphalt, the anti-photooxidation aging property of modified asphalt and the blank asphalt were studied. And the results showed that the sample of 5% TiO2 modified asphalt possesses more stable ductility and smaller softening point changing ratio.TiO2 doping can actively enhance the photooxidation properties of asphalt and TiO2 modified asphalt is capable of resisting photooxidation aging.

scholarly journals Multi-Functional Luminescent Coating for Wood Fabric Based on Silica Sol-Gel Approach

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 127
Author(s):  
Ming Li ◽  
Rui Huang ◽  
Zhengquan Fu ◽  
Di Wang ◽  
Chengyu Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ultraviolet Light ◽  
Prolonged Exposure ◽  
Sol Gel ◽  
Red Light ◽  
Three Dimensional ◽  
Outdoor Environments ◽  
Compound Coating ◽  
Luminescent Coating ◽  
Ultraviolet Aging

Environmentally friendly protection coatings have obtained increasing attention for their use in wooden materials, which can be destroyed easily when exposed to outdoor environments. A series of silane sol coatings coordinated with Eu3+ was prepared by hydrolyzing silane compounds. The obtained luminescent coating with three-dimensional net structure showed excellent optical, anti-ultraviolet aging, and thermal stability. The hybrid silane-modified compound coating was well-distributed on the wood by Si–O bonds to prevent its removal. The compound coating could stave off the decomposition of wood by converting ultraviolet light into red light and a charring action can endow the wood with thermal stability at high temperature, demonstrating the improvement of fire resistance and radiation residence following prolonged exposure to ultraviolet light, proving its excellent anti-ultraviolet aging properties.

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