Volume 5, Issue 2 (February 2008)

    A Novel Approach to Characterize Entrained Air Content in Pervious Concrete

    (Received 7 September 2007; accepted 17 January 2008)

    Published Online: 2008

    CODEN: JAIOAD

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    Abstract

    The current pervious concrete placed in cold climates generally contains air entrainment but, unlike traditional concrete, the evaluation of entrained air is not performed. This paper presents results from a study that characterized the entrained air voids in pervious concrete using a RapidAir system. The RapidAir system is an automatic device that determines the air void properties of hardened concrete according to ASTM C457, “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete.” Two types of aggregates, i.e., crushed limestone and rounded river gravel (pea gravel), and two types of air entraining agents, i.e., natural and synthetic, were used. The air entrainment dosage rates varied from zero to double the manufacturer’s recommended dosage. Compressive strength, tensile strength, and freeze-thaw durability (ASTM C666A) of the pervious concrete were tested. The results show that use of air entrainment improves workability of pervious concrete, thus reducing the overall porosity and increasing unit weight of the pervious concrete. The strength and freeze-thaw durability also increases with the level of entrained air in pervious concrete.


    Author Information:

    Kevern, J. T.
    Ph.D. CandidateAssociate Professor of Civil EngineeringAssociate Professor of Civil Engineering, Iowa State University Department of Civil, Construction, and Environmental, Engineering, Iowa, Ames

    Wang, K.
    Ph.D. CandidateAssociate Professor of Civil EngineeringAssociate Professor of Civil Engineering, Iowa State University Department of Civil, Construction, and Environmental, Engineering, Iowa, Ames

    Schaefer, V. R.
    Ph.D. CandidateAssociate Professor of Civil EngineeringAssociate Professor of Civil Engineering, Iowa State University Department of Civil, Construction, and Environmental, Engineering, Iowa, Ames


    Stock #: JAI101434

    ISSN: 1546-962X

    DOI: 10.1520/JAI101434

    ASTM International is a member of CrossRef.

    Author
    Title A Novel Approach to Characterize Entrained Air Content in Pervious Concrete
    Symposium , 0000-00-00
    Committee C09