Green and early age compressive strength of extruded cement mortar monitored with compression tests and ultrasonic techniques

Knowledge about the early age compressive strength development of cementitious materials is an important factor for the progress and safety of many construction projects. This paper uses cylindrical mortar specimens produced with a ram extruder to investigate the transition of the mortar from plastic and deformable to a hardened state. In addition, wave transmission and reflection measurements with P- and S-waves were conducted to obtain further information about the microstructural changes during the setting and hardening process. The experiments show that uniaxial compression tests conducted on extruded mortar cylinders are a useful tool to evaluate the green strength as well as the initiation and further development of the compressive strength of the tested material. The propagation of P-waves was found to be indicative of the internal structure of the tested mortars as influenced, for example, by the addition of fine clay particles. S-waves used in transmission and reflection mode proved to be sensitive to the interparticle bonding caused by the cement hydration and expressed by an increase in compressive strength.

• Availability:
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• Authors:
  • Voigt, Thomas
  • Malonn, Tim
  • Shah, Surendra P
• Publication Date: 2006-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 858-867
• Serial:
  • Cement and Concrete Research
  • Volume: 36
  • Issue Number: 5
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Cement; Cement mortars; Compressive strength; Concrete construction; Concrete structures; Microstructure; Ultrasonic tests
• Uncontrolled Terms: Early age concrete; Hardened concrete; Uniaxial compression
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01025079
• Record Type: Publication
• Files: TRIS
• Created Date: May 31 2006 9:29AM