Hot Mix Asphalt Technology - January/February 2008 - (Page 67)

CONEXPO-CON/AGG PRODUCT REVIEW Humboldt Mfg, Company Phunque Flask Specific Gravity Flask, For ﬁne aggregate—H-3383F For coarse aggregate—H-3383L. The Phunque Flask is the key element in a newly developed method for conducting speciﬁc gravity/absorption determinations for aggregate. This method has been designed to eliminate the inherent guess work built into ASTM C128 and AASHTO T-84—the current cone and tamper methods in use today. The test is easy to perform, easy to understand and easily reproduceable between technicians and labs; and is very easy to run reliably in the ﬁeld. The test can be especially helpful in asphalt operations where speciﬁc gravities can make a big impact on pay factors. This test lets the contractor check speciﬁc gravities on the material he is currently using, and not rely on lab tests, which may not be current. The test provides repeatable and consistent test results despite the use of different labs or technicians. It also enables the contractor and DOTs to begin to come to terms with the inherent problem of how much the aggregate from a given pit or source varies, both by location within the pit, and from different fundamental geological characteristics. Additionally, the test allows speciﬁc gravities to be tracked, and a moving-average chart maintained. If found to be appropriate, the contractor would be able to calculate the volumetrics using a moving average approach for the aggregate actually being used instead of the highly variable value determined in a lab 6 months to a year earlier. This process, itself, could eliminate many penalties and/or claims. The H-3388F is for ﬁne aggregate and has a neck approximately 1" in diameter. The H-3388L is used for coarse aggregate and has a neck approximately 2" in diameter. The scale on both items is readable to 0.1 grams; both include an excel calculation sheet and a swabbing utensil to keep the neck of the ﬂask dry during loading. Libra Systems, Inc. Introduces Revolutionary SelfAligning Trunnions Trunnions stay perfectly aligned at all times – for the life of the drum. Maxam Equipment has unveiled a radical new design for self-aligning trunnions, which eliminates maintenance costs and production downtime required to realign trunnions on existing drums. The innovative design uses three high-load capacity ball joints that allow the trunnion rollers to “float” along the face of the drum tires. This enables the trunnion roller to continuously adjust to the drum tires in any plane, keeping the trunnions and tires perfectly aligned – for the life of the drum. “Every other type of trunnion on the market has to be regularly realigned, and that’s a frustrating and expensive process, ” according to Maxam’s spokesperson. “Our Self-Aligning Trunnions eliminate that need, as well as the wear and tear caused when tires and trunnion rollers are out of alignment.” Maxam’s latest innovation is a key feature on all of the company’s new, SOLO™ drum mixers. In addition, the Self-Aligning Trunnions* also can be retrofitted to almost any existing drum or dryer. *patents pending Libra Systems is the worldwide leader for asphalt plant automation, aggregate scale ticketing, and enterprise integration solutions for the asphalt industry. With over 35 years of experience, Libra offers a full array of products and services to help producers improve quality, streamline operations, access valuable management information and achieve greater proﬁts, including: Enterprise Information Server – “Move your plants into your office!” Creates a seamless gateway between your • office and production facilities • Allows authorized personnel real-time access to company-wide data – anytime, anywhere • • • • • • • • • • Generation3 – “The Highly Configurable Solution to Your Company’s Specific Needs” Asphalt batching Silo loadout control Aggregate scale ticketing Point-of-sale Self-Service Kiosks – Increase truck throughput without increasing costs Reduces in-yard times Allows operating hours to be extended Silo Safety System – Are you at risk for a silo accident? Significantly reduces the possibility of opening the wrong silo Maxam Equipment Hot Mix Asphalt Technology – JANUARY/FEBRUARY 2008 • 67

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Hot Mix Asphalt Technology - January/February 2008 Contents Chairman's Commentary President's Perspective A Conversation with the New NCAT Director NCAT Test Track: Real-Time Testing for Real-World Results Warm Mix: The Lights are Green Illinois Tollway Tests RAP in Fast Forwarded Research Big Creek Teams with TxDOT to Pave Using Innovative Asphalt Mix Diamond Achievement Commendation Issues a Call for Quality Calendar of Events CONEXPO-CON/AGG Product Review Index of Advertisers Advertisers.com

Hot Mix Asphalt Technology - January/February 2008

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