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New product evaluation : Aucem cement blend, Lone Star Industries, Inc. : technical assistance report.
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2003-01-01
[PDF-2.45 MB]
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Alternative Title:New product evaluation : Aucem cement blend, Lone Star Industries, Inc.
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Abstract:The Louisiana Department of Transportation and Development (DOTD) receives many requests to use new products for soil treatment, soil stabilization, or reinforcements on construction projects. The product information provided by the manufacturer generally does not give enough detailed performance characteristics for a complete evaluation. The Soil Stabilization Product Evaluation (SSPE) Sub-Committee was established to provide for a standardized and comprehensive review process to evaluate new products that could improve DOTD road systems or enhance competition.
Long Star Industries, Inc. (LoneStar) produces a ground granulated blast furnace slag (GGBFS) called Aucem 120 Grade Slag. This slag is combined with Type I Portland cement to produce a slag-cement blend. LoneStar has requested approval to provide a blend (Aucem/Cement Blend) of 50% Portland cement and 50% Aucem slag as a substitute for 100% Portland cement. LoneStar was sent the new product evaluation procedure and submittal forms in a letter dated December 15, 1998.
This report presents a summary of the SSPE Sub-Committee's findings regarding the LoneStar product Aucem/Cement Blend. LoneStar seeks to have its Aucem/Cement Blend approved for use in state projects by the SSPE Sub-Committee.
The SSPE Sub-Committee developed and utilized a new product evaluation procedure to ensure a complete and objective evaluation of the Aucem/Cement Blend. The process consists of the following three phases: Phases 1 begins when a manufacturer submits a SSPE Form to the DOTD. Phase 2 starts after DOTD has reviewed the product and established a testing program to be performed by the manufacturer to verify product claims. Phase 3 consists of DOTD and Sub-Committee evaluation, which may include site-specific laboratory and/or field testing. Upon completion of Phase 3, DOTD may approve or reject the submitted product, or require additional testing if the results of Phase 3 are inconclusive.
After LoneStar completed Phases 1 and 2, it advanced to Phase 3 where two test sections were constructed to evaluate the product's performance. The first site is located in St. Martin Parish, and the second site is located in Tangipahoa Parish. The test sections were constructed at no additional cost to DOTD. The Louisiana Transportation Research Center (LTRC) tested these sections during and after construction.
The SSPE Sub-Committee reviewed the results of the laboratory and field tests and concluded that the Aucem/Cement Blend is not equal to the standard product (pure Portland Cement) in design, construction, or performance. The two key factors in this determination were strength and durability. The SSPE Sub-Committee therefore recommends the Aucem/Cement Blend not be approved as a direct equal to pure cement. Further testing is recommended with higher additive rates and higher cement percentages.
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