Microstructural investigation of innovative UHPC

Journal Article · Mon Mar 01 04:00:00 EST 1999 · Cement and Concrete Research

DOI:https://doi.org/10.1016/S0008-8846(98)00225-7· OSTI ID:351535

Reda, M M; Shrive, N G; Gillott, J E ^[1]

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1. Univ. of Calgary, Alberta (Canada). Dept. of Civil Engineering

The production of ultra high performance concrete (UHPC) with target strengths greater than 200 MPa has recently been considered for specific structural applications that need this enhanced mechanical performance. The main purpose of developing these innovative UHPC mixtures is to produce high-strength precast concrete elements with excellent durability to serve as both the inner wedges and the outer barrel of a new nonmetallic anchorage system. The anchorage is for post-tensioning applications using carbon fiber-reinforced polymer tendons. The UHPC mixtures examined show very dense microstructures with some unique characteristics. The bond between the micro carbon fibers and the cement paste seems to be very good and the cement paste observed in the vicinity of the fibers was shown to be very dense and homogeneous. The micro carbon fibers seem to govern the strength and postcracking behavior of these materials.

• OSTI ID: 351535
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 3 Vol. 29; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BONDING
CARBON FIBERS
COMPRESSION STRENGTH
CONCENTRATION RATIO
CONCRETES
MICROSTRUCTURE
PORTLAND CEMENT
SCANNING ELECTRON MICROSCOPY
SILICA