Composition and properties of SHCC. Part 1: Influence of composition of cement-based matrix on strain capacity and crack distribution. Part 2: Influence of elevated temperatures and freeze-thaw cycles on strain hardening cement-based composites

SHCC is a large family of cement-based materials with very different properties. This is a potential for intelligent materials architecture. In part 1, different types of SHCC have been prepared and tested. Properties of SHCC made with two different types of fly ash have been determined. In addition SHCC has been prepared with quartz sand with different grading and with local river sand. The grading has a strong influence on properties of SHCC. The different types of SHCC were characterized by their stress-strain diagram and by the crack width distribution. Finally the influence of silica fume was studied. The results show clearly the potential for development of types of SHCC for specific applications. In part 2, three different types of SHCC have been prepared and tested after exposure to elevated temperatures. The freeze-thaw resistance has been measured on one type of SHCC. SHCC made with quartz sand was more temperature sensitive than SHCC made with regional river sand. If SHCC was exposed to temperatures higher than 80 degrees celcius the maximum crack width under imposed strain of 0.5 % increases to values above 80 micrometres. SHCC made with river sand can support 200 freeze-thaw cycles without obvious damage. For applications at elevated temperatures and in climatic zones with many freeze-thaw cycles the composition of SHCC has to be optimized specifically. (A)

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  • Authors:
    • WU, R X
    • WITTMANN, F H
    • ZHAO, T J
    • WANG, P G
  • Publication Date: 2014-4

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01530094
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Files: ITRD
  • Created Date: Jul 3 2014 3:24PM