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Extension and Replacement of Asphalt Cement with Sulfur, Executive Summary.

PB296307

Publication Date	1978
Personal Author	Pickett, D. E.; Saylak, D.; Lytton, R. L.; Conger, W. E.; Newcomb, D.
Page Count	11
Abstract	The potential shortage of asphalt cement and oversupply of sulfur make it advantageous to reduce the dependence of the paving industry upon asphalt cement while using readily available sulfur. This report presents the results of an investigation of the use of elemental sulfur as a partial replacement and/or extender of asphalt cement in highway paving mixtures. Physical properties of numerous combinations of sulfur-asphalt emulsions were determined. Various aggregates, asphalt cements, and sulfur were tested in a series of laboratory screening tests utilizing nine independent design variables. Characterization tests were performed on selected combinations of aggregate, asphalt and sulfur using three different mixing methods. The resulting relationships between response characteristics, mixture compositions, and design variables were programmed into the Texas FPS-BISTRO and VESYS IIM design programs. Texas FPS-BISTRO screened a number of design combinations to find the optimum combinations. VESYS IIM was used to evaluate performance of selected optimum pavements. The studies indicate that the addition of sulfur to asphaltic concrete can produce pavements which are more economical with performance characteristics equal or superior to conventional asphaltic concrete pavements.
Keywords	Flexible pavements Bituminous cements Sulphur Aggregates Mixtures Mechanical properties Physical properties Asphalts Bituminous concretes VESYS 2M computer program FPS-BISTRO computer program
Source Agency	Federal Highway Administration
NTIS Subject Category	50C - Construction Equipment, Materials, & Supplies 50A - Highway Engineering
Corporate Authors	Texas Transportation Inst., College Station.; Federal Highway Administration, Washington, DC.
Supplemental Notes	See also report dated Mar 78, PB-292 487.
Document Type	Technical Report
Title Note	Final rept. Jun 75-Jun 78.
NTIS Issue Number	197919
Contract Number	DOT-FH-11-8799

Extension and Replacement of Asphalt Cement with Sulfur, Executive Summary.

Extension and Replacement of Asphalt Cement with Sulfur, Executive Summary.
PB296307

Publication Date	1978
Personal Author	Pickett, D. E.; Saylak, D.; Lytton, R. L.; Conger, W. E.; Newcomb, D.
Page Count	11
Abstract	The potential shortage of asphalt cement and oversupply of sulfur make it advantageous to reduce the dependence of the paving industry upon asphalt cement while using readily available sulfur. This report presents the results of an investigation of the use of elemental sulfur as a partial replacement and/or extender of asphalt cement in highway paving mixtures. Physical properties of numerous combinations of sulfur-asphalt emulsions were determined. Various aggregates, asphalt cements, and sulfur were tested in a series of laboratory screening tests utilizing nine independent design variables. Characterization tests were performed on selected combinations of aggregate, asphalt and sulfur using three different mixing methods. The resulting relationships between response characteristics, mixture compositions, and design variables were programmed into the Texas FPS-BISTRO and VESYS IIM design programs. Texas FPS-BISTRO screened a number of design combinations to find the optimum combinations. VESYS IIM was used to evaluate performance of selected optimum pavements. The studies indicate that the addition of sulfur to asphaltic concrete can produce pavements which are more economical with performance characteristics equal or superior to conventional asphaltic concrete pavements.
Keywords	Flexible pavements Bituminous cements Sulphur Aggregates Mixtures Mechanical properties Physical properties Asphalts Bituminous concretes VESYS 2M computer program FPS-BISTRO computer program
Source Agency	Federal Highway Administration
NTIS Subject Category	50C - Construction Equipment, Materials, & Supplies 50A - Highway Engineering
Corporate Authors	Texas Transportation Inst., College Station.; Federal Highway Administration, Washington, DC.
Supplemental Notes	See also report dated Mar 78, PB-292 487.
Document Type	Technical Report
Title Note	Final rept. Jun 75-Jun 78.
NTIS Issue Number	197919
Contract Number	DOT-FH-11-8799