Research on Performance of the Modified Asphalt by Diatomite-Cellulose Composite

2010 ◽  
Vol 158 ◽  
pp. 211-218 ◽  
Author(s):  
Yong Sheng Sun ◽  
Xiao Long Chen ◽  
Yue Xin Han ◽  
Bin Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Synergistic Effect ◽  
Ash Content ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Temperature Susceptibility ◽  
Cellulose Composite ◽  
Better Than

The diatomite-cellulose composite (DCC) was used to modified asphalt for pavement in the study, and then the high temperature performance, low temperature performance and temperature susceptibility of asphalt were studied. The results showed that these performances of asphalt were all improved after modified by DCC, and the performance of modified asphalt significantly associated with the ash content of DCC, and H-3 DCC was the best. The performance of modified asphalt by DCC was obviously better than using diatomite and cellulose directly. The improving properties of modified asphalt by DCC were caused by synergistic effect of diatomite and cellulose.

Applied Research of the Modifying Agent of Rubber Plastic Composite (MaR) in Asphalt Mixture

2013 ◽  
Vol 477-478 ◽  
pp. 1175-1178
Author(s):  
Ling Zou ◽  
Jing Wei Ne ◽  
Weng Gang Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Bending Test ◽  
Water Stability ◽  
Modified Asphalt ◽  
Modifying Agent ◽  
Temperature Performance ◽  
Splitting Test ◽  
Low Temperature Performance

70# and 90# matrix asphalt mixture with MaR were studied through dynamic modulus test, rutting test, freeze-thaw splitting test, bending test to study the applicability of the Modifying agent of rubber plastic compound (MaR) in matrix asphalt mixture.Test results were Compared with SBSI-C modified asphalt mixture.The results indicate that: high-temperature stability of MaR+70# asphalt mixture is as well as SBSI-C modified asphalt mixture,and is bettere than MaR+90# asphalt mixture; water stability of MaR+90# asphalt mixture is bettere than SBSI-C modified asphalt mixture and MaR+70# asphalt mixture; low temperature performance of MaR+90# asphalt mixture is bettere than MaR+70# asphalt mixture, but is worse than modified asphalt mixture SBSI-C ; MaR+70# asphalt mixture can be first used in area of resisting high temperature and rutting, MaR+90# asphalt mixture can be used if the water stability performance and low temperature performance are considered.

Analysis of Low Temperature and High Temperature Performance of Different Aggregate SMA

2013 ◽  
Vol 834-836 ◽  
pp. 252-258
Author(s):  
Peng Ren ◽  
Bo Zhang ◽  
Ya Qiao Wang ◽  
Lu Zhang ◽  
Lin Zhao
Keyword(s):  
Experimental Data ◽  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Limestone Aggregate ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Temperature Test ◽  
Better Than

Three kinds of combination schemes were designed about SMA-13 asphalt mixture. They were basalt aggregate SMA, limestone aggregate SMA, basalt and limestone aggregate SMA. Through the study of low temperature and high temperature test of three kinds of combination, the low temperature performance of basalt and limestone aggregate SMA was better than that of the basalt aggregate SMA; and the high temperature performance was in between, thus providing important experimental data for the limestones replacing basalt in SMA pavement.

Experimental Study on Polyphosphoric Acid (PPA) Modified Asphalt Binders

2010 ◽  
Vol 152-153 ◽  
pp. 288-294 ◽  
Author(s):  
Wei Dong Cao ◽  
Shu Tang Liu ◽  
Hong Lu Mao
Keyword(s):  
Low Temperature ◽  
Softening Point ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Point Test ◽  
Low Temperature Performance ◽  
Four Levels ◽  
Temperature Susceptibility

Polyphosphric acid (PPA) modified asphalt binders were produced in the laboratory using one base asphalt and four levels of PPA contents (0.6%, 1.0%, 1.5% and 2.0% by weight of base asphalt). Penetration test, softening point test, rotation viscosity test, creep test with bending beam rheometer (BBR) and four components test were carried out to study the performance of PPA modified asphalt binders and possible modification mechanism. The results indicate that the high-temperature performance of PPA modified asphalt binders are obviously improved and temperature susceptibility are decreased, but the low-temperature performance slightly decline compared with base asphalt. The PPA content has a very significant effect on softening point whereas it has no significant influence on low-temperature performance according to variance analysis (ANOVA). Finally, four components test reveals that the primary modification mechanism of PPA is the change of chemical composition of asphalt binder.

scholarly journals Laboratory Study on Properties of Diatomite and Basalt Fiber Compound Modified Asphalt Mastic

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Yongchun Cheng ◽  
Chunfeng Zhu ◽  
Guojin Tan ◽  
Zehua Lv ◽  
Jinsheng Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Basalt Fiber ◽  
Performance Study ◽  
Cone Penetration ◽  
Modified Asphalt ◽  
Asphalt Mastic ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Different Content

In order to improve the performance of asphalt mastic, some researchers have added diatomite or basalt fiber as a modifier to the asphalt mastic, and the results show that some properties of the asphalt mastic were improved. For the simultaneous addition of diatomite and basalt fiber, two kinds of modifier, compound modified asphalt mastic had not been reported; in this paper, thirteen groups of diatomite and basalt fiber (DBFCMAM) compound modified asphalt mastic with different content were prepared to study the performance. Softening point, cone penetration, viscosity, and DSR tests were conducted, for the high temperature performance evaluation of DBFCMAM, whereas force ductility and BBR tests were used in the low temperature performance study of the DBFCMAM. The results demonstrated that the high temperature performance of DBFCMAM was increased; moreover, the low temperature performance of DBFCMAM improved by diatomite and basalt fiber according to the results of the force ductility test; however, the conclusion of the BBR test data was inconsistent with the force ductility test. In summary, the high temperature and low temperature properties of DBFCMAM had been improved.

scholarly journals Study on Mechanical Behavior of Aging Asphalt Based on Composite Regeneration and Modification

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Haitao Zhang ◽  
Ying Wang ◽  
Zuoqiang Liu ◽  
Quansheng Sun
Keyword(s):  
Low Temperature ◽  
Social Benefits ◽  
Research Results ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt ◽  
Better Than ◽  
Butadiene Styrene

Although the aging asphalt and its regeneration were researched by many researchers, the poor low-temperature performance of regenerating asphalt has still not been solved yet. In this project, the composite technology of regeneration and modification will be used to solve the problem mentioned above. Through the investigation and analysis on the composite mechanism of regeneration and modification for aging asphalt, the objective of the project attempts to explore a method for the synchronized recovery of high- and low-temperature performance of aging asphalt. The research results show that the single regenerating technology cannot fully recover the low-temperature performance of aging asphalt, and the composite technology of regeneration and modification can make the performance of aging asphalt recovery well. The indexes of aging asphalt after composite regeneration and modification have been recovered, which are better than the indexes of 90# asphalt (25°C penetration is 80–100/0.1 mm) and close with the indexes of styrene-butadiene-styrene (SBS) modified asphalt. The project has demonstrated that the composite technology of regeneration and modification can make the high- and low-temperature performance of aging asphalt recovery well. The research results can obtain better economic and social benefits.

scholarly journals High and Low-Temperature Performance Evaluation and Microanalysis of SMCSBS Compound-Modified Asphalt

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 771
Author(s):  
Yu Sun ◽  
Dongpo He
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Modified Asphalt ◽  
The Road ◽  
Temperature Performance ◽  
Creep Stiffness ◽  
Low Temperature Performance ◽  
Styrene Butadiene ◽  
Sbs Modified Asphalt

The mixture of styreneic methyl copolymers (SMCs) normal temperature-modified asphalt and styrene-butadiene styrene block copolymer (SBS)-modified asphalt (SMCSBS) compound-modified asphalt was investigated in this study. The viscosity and temperature properties of compound modified asphalt (SMCSBS) were studied by Brookfield rotary viscosity test. Dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were used to test SMCSBS compound modified asphalt with different SMC additions. Finally, the microstructure and physicochemical properties of SMCSBS were evaluated by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), and the modification mechanism of the SMCSBS was studied. The results show that the viscosity of the compound-modified asphalt added with SMC is improved, which is conducive to improving its workability. With the increase of SMC content, the high-temperature performance of the compound modified asphalt firstly increases and then decreases with the increase of SMC content. When the content of SMC is 12%, its high-temperature performance is the best. Compared with SBS-modified asphalt, the SMCSBS has better low-temperature performance, and the creep stiffness S and creep rate m of the SMC with different content are better than that of SBS. Finally, the microcosmic characteristics show that the SMC can give full play to its characteristics and can be uniformly dispersed in SBS modified asphalt. SMC is essentially a surfactant, which can reduce the viscosity and construction temperature by changing the surface tension and surface free energy of asphalt molecules. The curing agent of epoxy resin is slowly cross-linked and cured after contacting with air to form a certain strength, thus improving the road performance of the asphalt mixture.

scholarly journals High and Low Temperature Performance and Fatigue Properties of Silica Fume/SBS Compound Modified Asphalt

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4446
Author(s):  
Xuewen Zheng ◽  
Wenyuan Xu ◽  
Huimin Feng ◽  
Kai Cao
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Silica Fume ◽  
Negative Impact ◽  
Fatigue Performance ◽  
Fatigue Properties ◽  
Temperature Property ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance

In order to study the high and low temperature properties, and fatigue properties, of silica fume/SBS (Styrene-Butadiene-Styrene) compound modified asphalt (SFSCMA), dynamic shear rheometer (DSR) and bending beam rheometer (BBR) are used to study matrix asphalt (MA), silica fume modified asphalt (SFMA) (silica fume (SF) 6%), SBS modified asphalt (SBSMA) (mass ratio of SBS to Matrix asphalt 4%), and silica fume/SBS compound modified asphalt, and the high temperature rheological properties of silica fume/SBS compound modified asphalt with different silica fume additions are also studied. The modification mechanism of SFSCMA was studied by scanning electron microscope (SEM). The investigation results turn out: along with the increase in the content of SF, the high temperature performance of SFSCMA is improved significantly. When the content of SF is 6%, the high temperature performance is the best. When the content of SF is more than 6%, the high temperature property of SFSCMA is lower than that of SBSMA. It is suggested to choose 6% as the content of SF. Compared with MA, SFMA, and SBSMA, SFSCMA has excellent high temperature performance; compared with MA and SFMA, the low temperature performance of SFSCMA is improved, but it is worse than that of SBSMA. Moreover, when the temperature is lower than −30 °C, its low temperature performance is close to that of MA, or even worse than that of MA. After the compound modification of SF and SBSMA, the fatigue properties of the asphalt are improved, and the fatigue performance of SFSCMA is the best among the four kinds of asphalt. There is a cross-linking force in the network structure of SFSCMA, which restrains the flow of the whole system, so that the stability of the compound modified asphalt is significantly improved, which is favorable to the high temperature performance and fatigue resistance of the compound modified asphalt. However, due to its low mobility, it has a negative impact on the low temperature performance of the compound modified asphalt. In addition, according to previous studies, compared with diatomite, it is proven that SF can reach the same level as diatomite in improving the high temperature performance and fatigue performance of asphalt. Therefore, SF can be used as a good choice of asphalt modifier and can achieve the purpose of waste recycling and environmental protection.

Polymer-Modified Asphalt Pavements in Ontario: Performance and Cost-Effectiveness

1996 ◽  
Vol 1545 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Joseph Ponniah ◽  
Gerhard Kennepohl
Keyword(s):  
Low Temperature ◽  
Life Cycle Cost ◽  
Field Performance ◽  
Life Cycle Cost Analysis ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Polymer Modified Asphalt ◽  
The Cost ◽  
Better Than

Two trial sections were constructed to investigate the rutting resistance and low temperature performance of different polymer-modified asphalt (PMA) mixes at sites representative of highways experiencing rutting as a result of heavy traffic loading in cold climatic regions. The two-way average annual daily traffic for both sites was >35,000 (6,000 vehicles per day). Modified asphalts used in the trial sections include engineered bitumen type 306, premium asphalt, reprocessed polyethylene (Novophalt), Neoprene, scrap tire rubber, Vestoplast-S, Kraton 4460, Styrelf, and polyethylene. Representative test samples of aggregates, asphalt cement, modified asphalts, and hot mixes were taken for routine testing during production. In situ quality control tests were done by taking plate samples while laying the mix and by coring after compaction. Additional laboratory tests were done at temperatures ranging from 0°C to —35°C to evaluate the materials’ low temperature cracking resistance. Field performance of trial sections was monitored yearly by crack mapping and measuring transverse profiles at 30-m spacing on each test section. Levels were taken at 100-mm intervals by using a dipstick. A computer program was written to process the data and calculate the rut depths for each wheelpath. Crack mapping was done to assess the crack growth in each test section. The performance of the sections was compared with respect to average rut depth and crack growth. The following are described: (a) the modified mix design chosen specifically to produce accelerated test results, (b) the experience gained in the construction of trial sections, (c) the results of laboratory testing to evaluate the low temperature performance of the PMAs, (d) the field performance evaluation with respect to rutting and cracking, and (e) the life cycle cost analysis. Average rut depth measurements 5 to 7 years after construction show that PMA pavement sections are performing better than conventional asphalt with respect to rutting. With regard to cracking, polymers with 85 to 100 penetration (pen) base asphalt did not perform better than control sections. However, there is an indication that PMA, which has a soft grade (150 to 200 pen) base asphalt, tends to improve low-temperature performance comparable to the control section. In other words, PMA generally performs better than conventional asphalt, provided it contains a soft grade (150 to 200 pen) base asphalt. Life cycle cost analysis indicates that PMA is cost-effective in extending pavement life by 2 to 3 years if the cost of polymer modification does not exceed the cost of conventional asphalt by 100 percent.

Comparative analysis on rheological characteristics of different modified asphalt based on DSR and BBR evaluation

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Guangyuan Wu ◽  
Haitao Zhang ◽  
Junfeng Sun ◽  
Tengjiang Yu
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Rheological Properties ◽  
Model Parameters ◽  
Content Type ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Sbs Modified Asphalt ◽  
Main Curve

Purpose In order to evaluate the rheological properties of asphalt more comprehensively and effectively, and to explore and discuss the practicability of relevant models in the evaluation of the rheological properties of asphalt. Design/methodology/approach Based on the rheological and viscoelastic theories, temperature scanning, frequency scanning and multiple stress creep recovery (MSCR) tests of different modified asphalt were carried out by dynamic shear rheometer (DSR) to obtain relevant viscoelastic parameters and evaluate the high temperature properties of different modified asphalt. Based on the time-temperature equivalence principle, the main curve was constructed to study the viscoelastic properties of asphalt in a wider frequency domain. The main curve was fitted with the CAM model, and the rheological properties of different modified asphalt were evaluated through the analysis of model parameters. The creep stiffness and creep velocity of different modified asphalt were obtained through the rheological test of bending beam (BBR), and the low-temperature performance of different modified asphalt was analyzed by using Burgers model to fit the creep compliance. Findings The results show that the high temperature rheological properties of several modified asphalt studied in the test are ranked from best to worst as follows: PE modified asphalt > SBS modified asphalt > SBR modified asphalt. Short-term aging can improve the high temperature performance of asphalt, and different types of modifiers can promote or inhibit this improvement effect. Based on BBR test and Burgers model fitting analysis, SBR modified asphalt has the best low temperature performance, followed by SBS modified asphalt, while PE modified asphalt has poor low temperature performance, so it is not suitable to be used as road material in low temperature area. Originality/value Combined with effective evaluation methods, the rheological properties of asphalt at different temperatures and angles were systematically evaluated, and the evolution of rheological properties of asphalt characterized by model parameters was further analyzed by advanced model simulation.

Evaluation of Service Performance of Recycled SBS Modified Asphalt Pavement

2014 ◽  
Vol 1079-1080 ◽  
pp. 152-155
Author(s):  
Yuan Yuan Wang ◽  
Lu Sun
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Pavement Materials ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Marshall Test ◽  
Moisture Stability ◽  
Low Temperature Performance ◽  
Sbs Modified Asphalt

Using the waste pavement materials can not only save resources such as bitumen and aggregate, but also reduce the pollution of environment. In this study, the high temperature performance and the moisture stability of recycled SBS modified asphalt mixture were evaluated by rutting test, immersion Marshall Test and freeze-thaw splitting routine test. In addition, the low temperature performance of recycled modified mixture was also analyzed by Fénix test whose operation was simple. The tests results illustrated that it was advantageous to improve the high temperature performance of recycled mixture and it has less influence on moisture stability with the addition of RAP. However, it had a significant adverse effect on the low temperature performance for recycled SBS modified asphalt mixture with a large quantity of RAP content. Therefore, it suggests that the RAP content for recycled SBS modified mixture is not too high.

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