Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.
Issue link: http://concrete.epubxp.com/i/442865
www.concreteproducts.com January 2015 • 67 FEATURE BASF MASTERSHERE In addition to MasterSphere FT 300 pro- duction, the Bloomington workshop saw BASF Admixtures Systems staff walk through the proposed Standard Test Method for Determining the Microsphere Content in Fresh Concrete by the Volu- metric Method. The basic procedure calls for sampling microsphere-dosed concrete mix; screening mortar and placing it in standard laboratory fask; adding water to fask; agitating by magnetic stirring; and, allowing microspheres to foat to the surface, then measuring the depth of their layer. Product Manager Mark Bury (opposite page) presented the proposed test method to ASTM C09.60 Subcom- mittee on Testing Fresh Concrete during December 2014 meetings in New Orleans. ILLINOIS DEPARTMENT OF TRANSPORTATION DEMONSTRATION IDOT PHOTOS: Concrete Products A late-summer Illinois Department of Transportation Bloomington Maintenance Garage workshop saw MicroSphere FT 300 production in a shipping container-housed prototype (opposite page) with polymer compound feed tank, conversion equipment and fnished admixture storage vessel. A load of ready mixed dosed with the agent at 1 percent target was for test pavement sections, plus conventional cylinder and beam specimens. IDOT crews placed three slabs, where heavy truck traffc and deicing compound exposure are as- sured. The slabs will allow comparison of a conventional IDOT bridge deck mix and Master- Sphere FT 300 concrete. Agency offcials elected to have the control and microsphere mixes pumped, a delivery method that can challenge the effectiveness of air-entraining agents.