00600670

Component

http://onlinepubs.trb.org...trr/1990/1259/1259-010.pdf

https://scholar.google.co...sett&publication_year=1990

Many factors affect the properties of asphalt concrete, and one of these is the maximum aggregate size used in the mix. A laboratory analysis of the effect of varying the maximum aggregate size on rutting potential and on other properties of asphalt aggregate mixtures was performed. The aggregate in all mixes evaluated consisted of 100% crushed limestone. The five different mix designs evaluated included aggregate having gradations that contained maximum aggregate sizes of 3/8, 1/2, 3/4, 1, and 1 1/2 in. The asphalt content for all mixes was selected to provide an air voids content of 4% under a compactive effort in the Gyratory Testing Machine equivalent of 75 blows of a Marshall hammer. All mixes produced with the five gradations were subjected to a testing program that included tests to evaluate Marshall stability and flow, indirect tensile strength, creep, and resilient modulus. Specimens for mix design and evaluation of mixture properties were compacted in a 4-in. diameter mold. In addition, specimens at optimum asphalt content were prepared in a 6-in. diameter mold and were tested by using the indirect tensile test and the creep test. These results were then compared to those from the 4-in. diameter specimens for the same aggregate gradations. Test results indicated that mixes with larger aggregate design with an air voids content of 4% were generally stronger than mixes prepared with smaller aggregate. The mixes with larger aggregate also required significantly less asphalt.

This paper appears in Transportation Research Record No. 1259, Chip Seals, Friction Courses, and Asphalt Pavement Rutting 1990.Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

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p. 107-119

1990

Transportation Research Record

0309050162

Figures (7) ; References (12) ; Tables (7)

Aggregate gradation; Aggregates; Air voids; Asphalt concrete; Asphalt content; Asphalt mixtures; Compaction; Creep tests; Crushed limestone; Diameter; Laboratory tests; Marshall test; Mix design; Modulus of resilience; Ruts (Pavements); Specimens; Tension tests

Aggregate size; Gyratory compaction; Indirect tensile test; Rut

Geotechnology; Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials; I36: Aggregates

TRIS, TRB, ATRI

Oct 31 1990 12:00AM

• CHARACTERIZATION OF RUTTING POTENTIAL OF LARGE-STONE ASPHALT MIXES IN KENTUCKY
• CHIP SEALS FOR HIGH TRAFFIC PAVEMENTS
• CORRELATION BETWEEN FIELD AND LABORATORY PERFORMANCE OF LIQUID ASPHALT-BASED SEAL COATS
• DESIGN OF LARGE-STONE ASPHALT MIXES TO MINIMIZE RUTTING
• EFFECTS OF CRUSHED PARTICLES IN ASPHALT MIXTURES
• ESTIMATING VOIDS IN A DOUBLE CHIP SEAL
• FLOW RATE AS AN INDEX OF SHAPE TEXTURE OF SANDS
• FRICTION COURSES FOR MODERATE TRAFFIC HIGHWAYS
• IMPROVING DURABILITY OF OPEN-GRADED FRICTION COURSES
• INFLUENCE OF AGGREGATE ON RUTTING IN ASPHALT CONCRETE PAVEMENTS
• LABORATORY AND FIELD STUDY OF PAVEMENT RUTTING IN SAUDI ARABIA
• RELATIONSHIP BETWEEN PERMANENT DEFORMATION OF ASPHALT CONCRETE AND MOISTURE SENSITIVITY
• RUT-RESISTANT ASPHALT CONCRETE OVERLAYS IN WISCONSIN
• USE OF GYRATORY TESTING MACHINE TO EVALUATE SHEAR RESISTANCE OF ASPHALT PAVING MIXTURE
• WASHINGTON STATE CHIP SEAL STUDY