You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    Volume 50, Issue 1 (July 2021)

    Comparative Evaluation of Surface Science Approach with Indirect Tensile Strength and Binder Bond Strength Tests to Determine Aggregate-Bitumen Bond

    (Received 24 January 2021; accepted 4 May 2021)

    Published Online: 09 July 2021

    CODEN: JTEVAB

      Format Pages Price  
    PDF (1.59 MB) 22 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    The present study investigated the efficacy of moisture sensitivity parameters obtained from the surface free energy (SFE) approach, namely the energy ratio (ER) and physiochemical parameters, by comparing the tensile strength ratio (TSR) and bond strength ratio (BSR) parameters, obtained from indirect tensile strength and binder bond strength tests, respectively. The bond strength against the moisture damage of basalt aggregates collected from two different sources with three different binder types, namely, unmodified (VG30), crumb rubber–modified (CRMB60), and polymer-modified (PMB40) binders, was evaluated. Results showed that both the ER parameter, which evaluates stripping potential of bitumen, and physiochemical parameters, which relate the compatibility of water with aggregate and bitumen, evaluated different rankings of an aggregate-bitumen system against moisture damage. However, the comparative study showed that physiochemical parameters evaluated similar rankings of aggregate and bitumen as obtained using TSR and BSR parameters in determining the aggregate-bitumen bond. Thus, it indicates that stripping of a binder may not always be the primary reason for moisture damage in bituminous mixes. It was observed that B2-CRMB60 with the highest ER of 0.71 was the least favorable combination in terms of resistance to moisture damage because of its lowest value of standard TSR and BSR parameters (i.e., 0.72 and 0.74, respectively) compared with five other combinations of aggregate-bitumen systems. Therefore, it is advised to carefully select the bond strength parameters to identify compatible aggregate-bitumen combinations while using the SFE approach. Further, it was found that the SFE approach is capable of addressing the complex moisture damage mechanisms in bituminous mixes; hence, it can be used for forensic investigations related to moisture damage in the field.

    Author Information:

    Mishra, Vinamra
    Civil Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai,

    Singh, Dharamveer
    Civil Engineering Department, Indian Institute of Technology Bombay, Room No. 25, Powai, Mumbai,


    Stock #: JTE20210050

    ISSN:0090-3973

    DOI: 10.1520/JTE20210050

    Author
    Title Comparative Evaluation of Surface Science Approach with Indirect Tensile Strength and Binder Bond Strength Tests to Determine Aggregate-Bitumen Bond
    Symposium ,
    Committee D04