DAMAGE CHARACTERIZATION OF THERMALLY DEGRADED CONCRETE . PROCEEDINGS OF 3RD INTERNATIOAL CONFERENCE ON DETERIORATION AND REPAIR OF REINFORCED CONCRETE IN THE ARABIAN GULF, BAHRAIN, OCTOBER 21-24 1989. VOLUME 1.

This paper presents work which was undertaken to study the detrimental effect of temperature variation on concrete durability due to the thermal incompatibility of its components (TICC). The objective of the work was to: (i) identify parameters that are TICC damage sensitive; (ii) study the influence of several mix and environmental variables on TICC damage, including aggregate type, mix design, initial pre-stress and wet-dry cycling (the latter two being studied using beam specimens); and (iii) identify possible means of ameliorating TICC damage. The influence of several mix and environmental variables was inferred by monitoring the following 3 characteristics of concrete: (a) fracture toughness; (b) modulus of rupture; and (c) permeability. In addition, the effect of TICC damage on admixture modified concrete was also studied. The types of aggregate selected were 3 limestone varieties used profusely in the Eastern Province for concrete construction: Jabal Dhahran, Abu Hadrigah and Riyadh. The influence of mix design was studied by considering a sandy mix. Admixtures considered included a commercial superplastizer, CONPLAST MI and a latex modified concrete. The effect of TICC related damage on a key durability factor, permeability, was established and it is proposed that a permeability index, defined as the ratio of the permeability at a specific number of thermal cycles to the initial permeability, be specified for the design concrete mix. Conditions that either exacerbate or reduce the effect of TICC damage are also identified and discussed. For the covering abstract of the conference see IRRD 828897.

  • Corporate Authors:

    BAHRAIN SOCIETY OF ENGINEERS

    PO BOX 835
    Manama,   Bahrain 
  • Authors:
    • Baluch, M H
    • Al-nour, LAR
    • Azad, A K
    • Al-Mandil, M Y
    • SHARIF, A M
    • PEARSON-KIRK, D
  • Publication Date: 1989

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00604103
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Feb 28 1991 12:00AM