There are many RAP and CC producers in Texas; therefore, it is important to consider different plants and locations in the characterization of these materials. Based on the surveys sent to commercial producers and TxDOT districts, major recycled RAP and CC producers were identified (e.g., Corpus Christi TxDOT district, Big City Crushed Concrete in Dallas, Southern Crushed Concrete in Houston). These major producers of RAP and CC were asked to periodically sample their product over a period of two months for characterization at the University of Texas and Texas A&M University. Characterization tests included gradation, Atterberg limits, specific gravity, pH, and resistivity. These are typical tests required by TxDOT and FHWA specifications for MSE wall backfill. The characterization of the various RAP and CC samples were used to evaluate the variation in properties between producers and over time
Company - Southern Crushed Concrete Location - Houston Product (Tons/Annum) - RAP/CC 2,000,000 Next 5 yrs - Over 2,000,000 Stockpile - YES Sources of Raw Materials - Pavements/Buildings Processing Recycled Material - Crushing/Milling in place Applications for Products - Structures/Pavement/Geotechnical Physical/Chemical Tests - YES Research Cooperation - YES
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