Author: Raymond E. Robertson
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 52
Book Description
The purpose of this Circular is to familiarize the asphalt user with the source of asphalt, the variable chemistry of asphalt, why variable performance should be expected when asphalt is used in roadways and what is currently missing from the specification process. Several areas are identified where refinements in the specification process would improve the ability to classify asphalts by their expected performance. This Circular summarizes more than 2,500 pages written during the past 20 years on the effects of fundamental chemistry on the rheological properties of asphalt. This Circular should be especially useful to civil engineering students who intend to work in some highway construction-related business.
Chemical Properties of Asphalts and Their Effects on Pavement Performance
Author: Raymond E. Robertson
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 52
Book Description
The purpose of this Circular is to familiarize the asphalt user with the source of asphalt, the variable chemistry of asphalt, why variable performance should be expected when asphalt is used in roadways and what is currently missing from the specification process. Several areas are identified where refinements in the specification process would improve the ability to classify asphalts by their expected performance. This Circular summarizes more than 2,500 pages written during the past 20 years on the effects of fundamental chemistry on the rheological properties of asphalt. This Circular should be especially useful to civil engineering students who intend to work in some highway construction-related business.
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 52
Book Description
The purpose of this Circular is to familiarize the asphalt user with the source of asphalt, the variable chemistry of asphalt, why variable performance should be expected when asphalt is used in roadways and what is currently missing from the specification process. Several areas are identified where refinements in the specification process would improve the ability to classify asphalts by their expected performance. This Circular summarizes more than 2,500 pages written during the past 20 years on the effects of fundamental chemistry on the rheological properties of asphalt. This Circular should be especially useful to civil engineering students who intend to work in some highway construction-related business.
Chemical Properties of Asphalts and Their Effects on Pavement Performance
Author: National Research Council, Transportation Research Board
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Chemical Properties of Asphalts and Their Effects on Pavement Performance
Chemical properties of asphalts and their relationship to pavement performance
Chemical Properties of Asphalts and Their Relationships to Pavement Performance
陽宅愛衆編
Performance of Bituminous and Hydraulic Materials in Pavements
Author: S.F. Brown
Publisher: Routledge
ISBN: 135142548X
Category : Technology & Engineering
Languages : en
Pages : 346
Book Description
This volume contains contributions from international experts, reflecting the rapid advances in the design of new improved bitumen and hydraulic bound composites, the trends in the use of waste and recycled materials and up-to-date methods of testing and evaluation.
Publisher: Routledge
ISBN: 135142548X
Category : Technology & Engineering
Languages : en
Pages : 346
Book Description
This volume contains contributions from international experts, reflecting the rapid advances in the design of new improved bitumen and hydraulic bound composites, the trends in the use of waste and recycled materials and up-to-date methods of testing and evaluation.
Physical and Chemical Properties of Asphalts Associated With Performance
Author: Jian-Shiuh Chen
Publisher:
ISBN:
Category : Asphalt binders
Languages : en
Pages : 9
Book Description
Detailed data were collected from field and laboratory evaluations to determine whether changes in crude oils affect the physical and chemical properties of asphalt binders over time. The test results indicated that asphalt cement properties produced today have the same range of values as those produced in the 1990s. Asphalts with high-viscosity susceptibility were shown to be associated with pavement distress. Field evaluations showed that asphalts with a viscosity susceptibility value lower than 0.088 will perform well without premature failure. Asphalts containing relatively low asphaltenes, particularly those of softer grade, appeared to have a greater probability of producing mixtures that could lead to pavement distress. Data analyses revealed that a good knowledge of the physical characteristics and chemical composition of asphalts can provide a useful tool for distinguishing between asphalts associated with pavement performance.
Publisher:
ISBN:
Category : Asphalt binders
Languages : en
Pages : 9
Book Description
Detailed data were collected from field and laboratory evaluations to determine whether changes in crude oils affect the physical and chemical properties of asphalt binders over time. The test results indicated that asphalt cement properties produced today have the same range of values as those produced in the 1990s. Asphalts with high-viscosity susceptibility were shown to be associated with pavement distress. Field evaluations showed that asphalts with a viscosity susceptibility value lower than 0.088 will perform well without premature failure. Asphalts containing relatively low asphaltenes, particularly those of softer grade, appeared to have a greater probability of producing mixtures that could lead to pavement distress. Data analyses revealed that a good knowledge of the physical characteristics and chemical composition of asphalts can provide a useful tool for distinguishing between asphalts associated with pavement performance.
Evaluation of Asphalt Properties and Their Relationship to Pavement Performance: Presentation and evaluation of data
Properties of Asphalt Cements Used in Virginia and Their Effects on Pavement Performance
Author: Woodrow J. Halstead
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 10
Book Description
Results of usual tests for specification compliance and special tests to show viscosity-temperature susceptibility and ductility penetration relationships for asphalts supplied for use by the Virginia Department of Highways and Transportation in 1983 are reported. The results to date have not revealed any asphalts with unusual properties. Differences in viscosity-temperature susceptibilities of products from different suppliers were relatively small. The results also indicate that satisfactory performance of properly designed and placed mixtures would be expected with all of these products, but a firm conclusion to this affect cannot be drawn until the ability of the asphalts to adhere to aggregates is determined. Such tests are planned. The addition of a requirement to asphalt cement specifications that the ash not exceed 0.40 percent is recommended. Such a requirement would provide protection against products from unusual refining processes that contain appreciable amounts of organic sodium salts.
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 10
Book Description
Results of usual tests for specification compliance and special tests to show viscosity-temperature susceptibility and ductility penetration relationships for asphalts supplied for use by the Virginia Department of Highways and Transportation in 1983 are reported. The results to date have not revealed any asphalts with unusual properties. Differences in viscosity-temperature susceptibilities of products from different suppliers were relatively small. The results also indicate that satisfactory performance of properly designed and placed mixtures would be expected with all of these products, but a firm conclusion to this affect cannot be drawn until the ability of the asphalts to adhere to aggregates is determined. Such tests are planned. The addition of a requirement to asphalt cement specifications that the ash not exceed 0.40 percent is recommended. Such a requirement would provide protection against products from unusual refining processes that contain appreciable amounts of organic sodium salts.