Measuring the Specific Gravities of Fine Aggregates: An Automated Procedure

Zhan-Ping You ； Julian Mills-Beale ； R. Christopher Williams ； Qing-Li Dai

《International Journal of Pavement Research and Technology》 2卷2期 (2009/03) Pp. 37-50

https://doi.org/10.6135/ijprt.org.tw/2009.2(2).37

並列摘要

The objective of the research described in this paper was to evaluate the use of the new automated SSDetect in determining the specific gravities of fine aggregates in Michigan. Currently, the American Association of State Highway and Transportation Officials (AASHTO) Standard, AASHTO T-84, Standard Method of Test for Specific Gravity and Absorption of Fine Aggregate, is used in determining the specific gravity of fine aggregates in Michigan. This test procedure basically utilizes a standard frustum cone and tamping rod to find the saturated surface-dry (SSD) state of the fine aggregate; after 15hrs of soaking in water. In addition to its time consuming nature, the AASHTO T-84 is problematic with angular and rough textured fine aggregate because they do not readily slump. The new SSDetect is proposed as a viable alternative in accurately and efficiently finding specific gravities using the scientific laws of reflection of infra-red light rays. Results of the research indicate statistical similarity between the AASHTO T-84 and SSDetect for specific gravity measurement.

並列關鍵字

AASHTO T-84 ； Fine aggregate ； Specific gravity ； SSDetect