Submicroscopic Deformation in Cement Paste and Mortar at High Load Rates.
Abstract
Research into the submicroscopic behavior of the cement paste and mortar constituents of concrete is enhanced through the acquisition of an integrated scanning electron microscope, energy dispersive spectrometer, image analysis system. The combined system is used to obtain crack surveys of cement paste and mortar loaded in uniaxial compression at strain rates ranging from 0.3 to 300,000 microstrain per second. Research background, equipment selection procedures, equipment capabilities, installation, and on-site evaluation are described. Crack dimensions, orientations, and locations are determined using the combined instrumentation. The surface crack distributions are converted to three-dimensional crack distributions, which are in turn used in estimate the portion of the total deformation due to cracking. The new instrumentation provides a major improvement in both the quality and the quantity of crack data available for analysis. Keywords: Cement, Concrete, Electron microscopes, Image analysis, Microcracks, Microscopic, Mortar, Strain rate, Submicrocracks, X ray analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 23, 1987
- Accession Number
- ADA189691
Entities
People
- David Darwin
Organizations
- University of Kansas