Accession Number:

ADA210180

Title:

High-Strain-Rate Behavior of Hydrated Cement Paste

Descriptive Note:

Final rept. Jan 1986-May 1989

Corporate Author:

MARTIN MARIETTA LABS BALTIMORE MD

Personal Author(s):

• Ritter, A.
• Childs, G.
• Bridger, K.
• Winzer, S.
• Barker, D.

Report Date:

1989-05-31

Pagination or Media Count:

104.0

Abstract:

Concrete paste and mortar were studied at intermediate to high strain-rates and peak pressures up to 150 kbar,to determine how the microstructure responded to dynamic loading. Intermediate response was primarily brittle failure,while high strain-rate shock loads induced micro cracking, particle size reduction, lattice distortion and alteration andor elimination of porosity. Effects were isolated by comparing explosively-loaded specimens with unshocked reference materials, using X-ray diffraction, scanning electron microscopy, and mercury porosimetry. Cement microstructure Dynamic loading Shock effects Concrete.

Descriptors:

• *CEMENTS
• DISTORTION
• MICROSTRUCTURE
• MATERIALS
• ELECTRONIC SCANNERS
• X RAY DIFFRACTION
• CONCRETE
• POROSITY
• HYDRATES
• REDUCTION
• ELECTRON MICROSCOPY
• RESPONSE
• SHOCK
• PRESSURE
• DYNAMIC LOADS
• LATTICE DYNAMICS
• ELIMINATION
• PARTICLE SIZE
• PEAK VALUES

Subject Categories:

• Adhesives, Seals and Binders

Distribution Statement:

APPROVED FOR PUBLIC RELEASE