STP597: Chert-Aggregate Concrete Durability After Antifreeze Treatment

    Lin, CH
    Engineer, Carolina Power and Light Company, Raleigh, N. C.

    Walker, RD
    Professor and headprofessor, Virginia Polytechnic Institute and State University, Blacksburg, Va.

    Payne, WW
    Professor and headprofessor, Virginia Polytechnic Institute and State University, Blacksburg, Va.

    Pages: 9    Published: Jan 1976


    Abstract

    One potential method of aggregate upgrading and analysis of its economic feasibility is illustrated. A low durability predominantly chert aggregate was used in concrete after being vacuum saturated with various liquids including plain water, solutions of water and ethylene-glycol, plain ethylene glycol, and water saturated with calcium chloride. Concrete specimens were fabricated and exposed to alternate cycles of freezing and thawing in water. Concrete with aggregates saturated with 100 percent ethylene-glycol showed a strong increase in durability. The calcium chloride treatment showed no effect. A “ball park” cost comparison showed that aggregate production with ethylene-glycol would cost about 4.5 cents per ton as against 20 cents per ton for normal heavy-media separation treatment.

    Keywords:

    aggregates, antifreezes, concrete durability, chert, heavy media


    Paper ID: STP32346S

    Committee/Subcommittee: C09.21

    DOI: 10.1520/STP32346S


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