Invention Grant
- Patent Title: Systems and methods for maximum specific gravity tests for asphalt mixture samples
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Application No.: US15225322Application Date: 2016-08-01
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Publication No.: US10215678B2Publication Date: 2019-02-26
- Inventor: Dirk M. Steckmann , Ali Regimand , Lawrence H. James , Andrew T. LaCroix , Johnny G. Williams, Jr. , Adam C. O'Neill
- Applicant: InstroTek, Inc.
- Applicant Address: US NC Raleigh
- Assignee: InstroTek, Inc.
- Current Assignee: InstroTek, Inc.
- Current Assignee Address: US NC Raleigh
- Agency: Myers Bigel, P.A.
- Main IPC: G01N9/36
- IPC: G01N9/36 ; G01N9/26 ; G01N33/42

Abstract:
A system for conducting a maximum specific gravity test includes a sealable container for receiving and holding an asphalt mixture sample, a vacuum pump in fluid communication with the container for evacuating the container, a valve in fluid communication with the container, a shaker for shaking the container, and a controller. The controller can operate the system in a test mode by: (i) turning on the vacuum pump; (ii) automatically monitoring a vacuum pressure in the container with the vacuum pump on; (iii) automatically turning on the shaker when the monitored vacuum pressure reaches a target vacuum pressure value; (iv) automatically opening or closing the valve such that the monitored vacuum pressure in the container is maintained within a target vacuum pressure range for a predetermined period of time with the shaker on; and (v) automatically turning the shaker off at the end of the predetermined period of time.
Public/Granted literature
- US20180031461A1 Systems and Methods for Maximum Specific Gravity Tests for Asphalt Mixture Samples Public/Granted day:2018-02-01
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