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Corresponding Author

Mohamady, Ahmed

Subject Area

Civil and Environmental Engineering

Article Type

Original Study

Abstract

Future needs and challenges in the asphalt concrete industry should make use of developed and new techniques to attain the best field performance. Spreading and compacting fresh asphalt concrete mix is a very important job during pavement construction. The compaction mechanism in the field greatly affects the pavement characteristics, performance, and service life. Several studies tried to use different compaction techniques to simulate the actual field compaction in the laboratory. The purpose of this study aims at introducing an innovative compaction technique that simulates the actual field compaction conditions to a great extent as presented in the research results. The technique employs the traditional Marshall-CBR testing machine in compacting the asphalt mixes, A steel disc is placed over the sample, which is continuously compressed in the Marshall mould till reaching the required the traditional Marshall and the proposed sample dimensions. Results obtained from compaction techniques are compared with field results. Analysis of the results showed large coincidence between the proposed compaction technique and the field results. On the other hand, specimens compacted using the traditional Marshall technique showed larger deviation with the field results in almost all the tested properties.

Keywords

Asphalt concrete mix; Marshall Test; Compaction technique; Mix unit weight; Mix stability; and Air voids

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