DETECTION OF OPTIMUM GYPSUM CONTENT IN POLYSTYRENE CONCRETE BY UPV AND RESONANCE TECHNIQUES

This paper presents the results of an investigation into the effect of internal sulphate attack on the durability of polystyrene concrete. The extent of damage due to sulphate attack in mixes with varying gypsum contents, different cement types and normal and accelerated curing regimes was assessed using destructive (direct compression) and non-destructive (ultrasonic pulse and forced-resonance) methods. The optimum amount of SO3 that each mix can tolerate safely, ie optimum gypsum content, was taken as the highest value obtained from compressive strength and ultrasonic pulse velocity (UPV) trends corresponding to cubes cured for 180 days and dynamic E-modulus trends corresponding to prisms cured for 2 years. The results indicated that the destructive and non-destructive techniques used in this study were equally effective in detecting the optimum gypsum content (OGC). Polystyrene concrete was found to accommodate higher OGC values compared to normal-weight concrete. The optimum gypsum content was found to increase with lower C3A content in the mix and higher curing temperature. For the covering abstract see ITRD E111699.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0947644320
• Corporate Authors:

  ENGINEERING TECHNICS PRESS

  46 CLUNY GARDENS
  EDINBURGH,   United Kingdom  EH10 6BN
• Authors:
  • NAJI, B
  • RAVINDRARAJAH, R S
  • CHUNG, H W
• Conference:
  • PROCEEDINGS OF THE SEVENTH INTERNATIONAL CONFERENCE ON STRUCTURAL FAULTS AND REPAIR, 8 JULY 1997. VOLUME 2: CONCRETE AND COMPOSITES
• Publication Date: 1997

Language

• English

Media Info

• Features: References;
• Pagination: p. 139-45

Subject/Index Terms

• TRT Terms: Concrete; Conferences; Evaluation and assessment; Gypsum; Polystyrene; Resonance; Test procedures; Ultrasonics
• ITRD Terms: 4755: Concrete; 8525: Conference; 9020: Evaluation (assessment); 4175: Gypsum; 7422: Polyvinylhydrocarbon; 5569: Resonance; 6288: Test method; 6739: Ultrasonic
• Subject Areas: Data and Information Technology; Planning and Forecasting;

Filing Info

• Accession Number: 00922436
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-947644-32-0
• Files: ITRD
• Created Date: Apr 2 2002 12:00AM