A Predictive Approach for Long-Term Performance of Recycled Materials Using Accelerated Aging.

Publication: Public Roads
Date: Thursday, November 1 2001

Volume I: Final Report

Volume II: Appendices

Publication Nos. FHWA-RD-01-022 and -023

The use of recycled materials in a proposed highway application frequently requires the assessment of physical and environmental performance. Future behavior is often difficult to

predict. As an alternative to field demonstrations, there is a need to develop strategies to predict long-term physical and environmental performance. Accelerated aging is one means of exploring the long-term physical and environmental performance of recycled materials in a highway.

Coal fly ash use in portland cement concrete (PCC) was selected as a model system to develop an accelerated aging approach. Three types of accelerated aging were chosen for this project: Arrhenius aging, cyclic loading, and freeze-thaw exposure. This approach, incorporated in an experimental design, allowed a systematic exploration of the separate effects and combined interactions of both developmental and degradative accelerated aging variables. A slab from U.S. Route 20 in northwest Iowa was used as both the basis for the concrete mixes and as a field verification site.

The NTIS publication number is PB2001-107670 for volume I and PB2001-107671 for volume II.

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Starbucks To Adopt Recycled Cups

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Recycled resins stable but poised for increases.

* Summer often brings a lull in recycled resin pricing. This season is no exception --except for polystyrene, where virgin prices are soaring and taking ......

Recycled prices remain strong despite softer virgin prices.

* With recycled resin prices firm and virgin prices softening, recycled resin suppliers say the two prices are now in close proximity. However, recyclers expect ......

GREEN BANK OFFICE COMES WITH EXCELLENT RANGE OF RECYCLED PRODUCTS

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BOOSTING SALES FOR RECYCLED CONTENT PRODUCTS

A program in King County, Washington known as LinkUp, has for many years helped to build sales opportunities for companies using recycled materials as feedstocks ......

Mangalox increases use of recycled cullet; cullet proportions can be increased to 80%...

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Recycled beauty.

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Recycled prices soften.

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Recycled products.

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Recycled prices stabilize after downturn in the last quarter.

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Subject: Road construction (Equipment and supplies), Recycling, Recycling industry (Evaluation)
Product: Recovery Systems NEC
Location: United States

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