scholarly journals Evaluation of a Cold-Mixed High-Performance Polyurethane Mixture

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Sun Min ◽  
Yufeng Bi ◽  
Mulian Zheng ◽  
Sai Chen ◽  
Jingjing Li
Keyword(s):  
Energy Consumption ◽  
High Performance ◽  
Greenhouse Gas Emission ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Forming Mechanism ◽  
And Performance

The energy consumption and greenhouse gas emission of asphalt pavement have become a very serious global problem. The high-temperature stability and durability of polyurethane (PU) are very good. It is studied as an alternative binder for asphalt recently. However, the strength-forming mechanism and the mixture structure of the PU mixture are different from the asphalt mixture. This work explored the design and performance evaluation of the PU mixture. The PU content of mixtures was determined by the creep slope (K), tensile strength ratios (TSR), immersion Cantabro loss (ICL), and the volume of air voids (VV) to ensure better water stability. The high- and low-temperature stability, water stability, dynamic mechanical property, and sustainability of the PU mixture were evaluated and compared with those of the stone matrix asphalt mixture (SMA). The test results showed that the dynamic stability and bending strain of the PU mixture were about 7.5 and 2.3 times of SMA. The adhesion level of PU and the basalt aggregate was one level greater than the limestone, and basalt aggregates were proposed to use in the PU mixture to improve water stability. Although the initial TSR and ICL of PU mixture were lower, the long-term values were higher; the PUM had better long-term water damage resistance. The dynamic modulus and phase angles (φ) of the PU mixture were much higher. The energy consumption and CO2 emission of the PU mixture were lower than those of SMA. Therefore, the cold-mixed PU mixture is a sustainable material with excellent performance and can be used as a substitute for asphalt mixture.

Preparation and Performance Evaluation of Cold Mix Asphalt Mixture

2020 ◽  
Vol 20 (8) ◽  
pp. 4824-4831
Author(s):  
Zhilin Sun ◽  
Yawen Li ◽  
Junhui Zhang ◽  
Sanchun He
Keyword(s):  
Asphalt Mixture ◽  
Basalt Fiber ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Residual Rate ◽  
Initial Strength ◽  
Mix Proportion ◽  
And Performance ◽  
Residual Stability

Cold mix asphalt mixture has a low strength and poor water stability, hence to solve this challenge, a cold mix asphaltic liquid was prepared in this study based on microscopic properties. LB-10 gradation was adopted and basalt fiber was selected as a reinforcing agent. The optimum asphaltaggregate ratio was determined by the Marshall test, and mix proportion was also designed. The laboratory tests were used to systematically evaluate road performance of the cold mix asphalt mixture. From the test results, it was shown that the initial strength, molding strength, immersion Marshall strength, residual stability, freeze-thaw splitting ratio, residual rate and dynamic stability of self-made cold mix asphalt mixture were 2.42 kN, 4.87 kN, 6.79 kN, 92.8%, 82.05%, 99.5% and 632 times/mm respectively. The initial strength, molding strength and residual stability of mixture became 90.9%, 88.7%, and 96.2%, respectively of their former values after one-month storage, showing good workability. By analyzing its research data and comparing with its existing products, the developed cold mix asphalt mixture can not only meet the requirements for road performances of the cold mix asphalt mixture in terms of strength, workability and high temperature stability, but greatly improves the water stability, storage stability and cohesive performance of the mixture.

scholarly journals Study on Laboratory Experimental Pavement Performances of SEAM Modified Asphalt Mixture

2019 ◽  
Vol 136 ◽  
pp. 03010
Author(s):  
Ma Qingna ◽  
Zhao Zhiqin ◽  
Xu Qian ◽  
Sun Feng
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
The Road ◽  
Road Performance ◽  
Property Index

Adding sulphur dilution asphalt modifier SEAM to asphalt mixture is not only a modifier of asphalt mixture, but also an additive of asphalt mixture. When the modifier is added into the asphalt mixture, the road performance of the asphalt mixture can be improved. This paper studies SEAM modified asphalt mixture the Marshall property index, temperature stability, Water stability and fatigue feature in the Laboratory. On the based of the result of the experiment and analysis, SEAM can improve the high temperature stability, Water stability and fatigue feature. But the low temperature stability can’t improve.

Hamburg Wheel Tracking Test for Porous Asphalt Concrete

2012 ◽  
Vol 178-181 ◽  
pp. 1338-1343
Author(s):  
Wei Jiang ◽  
Jing Jing Xiao
Keyword(s):  
High Temperature ◽  
Raw Materials ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Porous Asphalt ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Hamburg Wheel Tracking

According to the porous asphalt concrete’s big void structure as well as high temperature and rainy application environment, the author point out that using the conventional evaluation index such as high temperature stability and water stability to evaluate the PAC’s performance seem single, and then put up with estimating the PAC’s pavement performance by means of Hamburg Wheel Tracking under the water-high temperature’s comprehensive action. Studied on the PAC with the same raw materials and different gradations, and compared with the experimental results of AC-13 modified asphalt mixture and SMA-13, the results shows that, Hamburg Wheel Tracking test not only considered the water-high temperature’s comprehensive action on mixture, but also considered the mixture’s performance decay under long-term loading. Hamburg Wheel Tracking test can evaluate the PAC’s performance more practically, the PAC which materials and graduations reasonably designed have good performance, and its Hamburg Wheel Tracking final deformation is only 3.89mm, it can satisfy the demand from the high temperature and rainy environment. As well, the test results also comes to the conclusions that under the same materials and the same air voids, the PAC with coarse framework structure own better water stability and water-high temperature stability.

Research Application of Colored Asphalt Mixture Pavement

2014 ◽  
Vol 900 ◽  
pp. 459-462 ◽  
Author(s):  
Zhi Gang Xin
Keyword(s):  
Asphalt Mixture ◽  
Temperature Stability ◽  
Active Role ◽  
Social Benefits ◽  
Pavement Performance ◽  
Water Stability ◽  
High Temperature Stability ◽  
Research Application ◽  
Low Temperature Cracking ◽  
Technical Capability

This paper analyzes the pavement performance of colored asphalt mixture of its high-temperature stability, water, stability low-temperature cracking resistance, and color characteristics, etc.; evaluates the technical capability, economic and social benefits, discusses the constriction technology and points for consideration for its ratio design, mixing, spreading and rolling of colored asphalt mixture pavement, which play an active role on application, extension and development of this technology.

Study on Pavement Performance of High Volume Reclaiming Asphalt Mixture

2014 ◽  
Vol 1081 ◽  
pp. 260-264
Author(s):  
Wei Rong Huang ◽  
Ming Tan
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Crack Resistance ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
High Volume ◽  
Pavement Performance ◽  
Water Stability ◽  
High Temperature Stability ◽  
Temperature Crack

It was based on laboratory test, in order to study on the high temperature stability, water stability and low-temperature crack resistance of AC-16 reclaiming asphalt mixture with different proportion of old material, this test takes into account 9 kinds of these asphalt mixture. The results show, with the old material blending ratio increased, the high temperature stability of asphalt mixture changed for the better, water stability and low-temperature crack resistance deteriorated. The pavement performance meet the requirements of secondary road or less, when old material content is within 70%. The research results provide reference for the application of reclaiming asphalt mixture.

Research of Coarse Grading Asphalt Mixtures Based on Grey Relational Analysis

2014 ◽  
Vol 599 ◽  
pp. 234-238 ◽  
Author(s):  
Liang Liang Tu ◽  
Jun Zheng ◽  
Shao Peng Wu
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Grey Relational Analysis ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Relational Analysis ◽  
Low Temperature Cracking ◽  
Grey Relational

Grey relational analysis (GRA) is an important data handling techniques. In this paper, combining the characteristics of asphalt mixture, the method of GRA is applied to the study of coarse grading. The high temperature stability, low temperature cracking resistance and water stability of asphalt mixture with different grading were evaluated in the laboratory. The results showed that OGFC-25 gradation apply to asphalt mixture that demand high temperature stability. Similarly, ATB-25 gradation benefit low temperature performance and SUP-25 benefit water stability.

Experimental Study on Pavement Performances of SBP Modified Asphalt

2014 ◽  
Vol 587-589 ◽  
pp. 1186-1189
Author(s):  
Ya Zhen Sun ◽  
Chuan Jiang Zhu ◽  
Jin Chang Wang ◽  
Yuan Yuan ◽  
Gang Bing Wu
Keyword(s):  
High Temperature ◽  
Heating Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
Superpave Gyratory Compactor ◽  
Wheel Tracking Test ◽  
Wheel Tracking

In order to study the effectiveness of new type modified asphalt additive SBP on pavement performance of asphalt mixture, the experiments were carried out to evaluate the mixing and compaction temperature, high-temperature stability and water stability of SBP modified asphalt mixture. The high-temperature stability of the SBP modified asphalt mortar was studied by DSR. The heating temperature of mineral aggregate and the asphalt mixture mixing temperature and compacted temperature were determined by three different temperature asphalt mixture SCB test, which were got SGC (Superpave Gyratory Compactor). The wheel tracking test of asphalt mixture was carried to evaluate the high-temperature stability and freeze-thaw split test were studied the water stability. Through the wheel tracking test and water stability test in harsh condition, the high-temperature stability and water stability was evaluated again. It can be concluded that SBP can improve the pavement performances of asphalt mixtures.

scholarly journals Design method of the mix ratio of hot mix plant recycled asphalt mixture containing high mixture content

2021 ◽  
Vol 261 ◽  
pp. 02064
Author(s):  
Yunwu He ◽  
Tao Liu ◽  
Tao Wang ◽  
Xiayi Liang ◽  
Hanxin Wei ◽  
...  
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Water Stability ◽  
High Temperature Stability ◽  
Recycled Asphalt ◽  
The Road ◽  
Technical Requirements ◽  
Road Performance ◽  
Temperature Crack

This paper mainly used the Superpave and the Marshall design methods to design the mix ratio of the hot mix plant recycled asphalt mixture. The road performance of AC-20, SUP-20 with 30% RAP content and AC-20 with 50% RAP content was studied to evaluate the water stability and high temperature stability and low temperature crack resistance of the recycled asphalt mixture. Research shows that the road performance of AC-20 mixed with 50% RAP content meets the technical requirements of the same type of asphalt mixture. It is recommended to use the Marshall design method for hot mix plant recycled asphalt mixture design.

scholarly journals Development and Evaluation of Solvent-Based Cold Patching Asphalt Mixture Based on Multiscale

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Shuolei Huang ◽  
Junda Ren ◽  
Mingguang Li ◽  
Zhuolin Li ◽  
Shuiwen Zhou
Keyword(s):  
High Performance ◽  
Raw Materials ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
The Road ◽  
Performance Indexes ◽  
Final Formula ◽  
Orthogonal Test Design ◽  
Residual Stability

In order to prepare a kind of high-performance asphalt pavement pit repair material and extend the service life of the road, this paper starts from the microscopic view of the raw materials, uses infrared spectrum, four component analysis method, lying drop method, column wick technology principle, etc. to select the raw materials and determine the initial amount of the cold patching asphalt mixture, and optimizes the formula through the orthogonal test design and adhesion, cohesion, initial stage strength, later strength, residual stability, and other performance indexes, and determines the final formula of cold patching asphalt mixture as follows: the design porosity is 15 ± 0.5%, compatibilizer is 2.5%, linear SBS modifier is 5%, tackifier is 4%, antistripping agent is 3.5%, and the dosage of diluent D should be determined according to the ambient temperature. The results show that the performance of the self-made cold patching asphalt mixture is good verified by adhesion grade, strength, high temperature stability, water stability, and other road performance.

The Performance Research of Adjusting Material Based on Asphalt Pavement

2012 ◽  
Vol 253-255 ◽  
pp. 616-620
Author(s):  
Jian Gang Qiao ◽  
Ya Qiong Wang ◽  
Ning Yang
Keyword(s):  
High Performance ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Modified Asphalt ◽  
Asphalt Modification ◽  
Road Materials ◽  
Save Energy ◽  
Performance Research

As the construction and development of highway need high performance of road materials, the conventional asphalt mixture is difficult to meet the requirements. To save energy, the paper researches into adjusting agent, asphalt modification, fiber and rubber powder, analyzes performance characteristics of different adding methods, adding materials and adding quantities through comparative and experimental analysis, and obtains superior high temperature stability and low temperature stability of asphalt mixture with adjusting agent compared with modified asphalt mixture, which explores a new idea for the application of waste materials in highway construction.

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