Accession Number:

ADA624827

Title:

Shock Wave Propagation in Cementitious Materials at Micro/Meso Scales

Descriptive Note:

Conference paper

Corporate Author:

NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO

Report Date:

2015-08-31

Pagination or Media Count:

8.0

Abstract:

Shock wave response of heterogeneous materials like cement and concrete is greatly influenced by the constituents and their statistical distributions. The microstructure of cement is complex due to the presence of unhydrated water, nanomicro pores, and other hydrated and unhydrated products, such as the C-S-H gel, tri-calcium silicate, di-calcium silicate etc. The evolved microstructures at different degrees of hydration are captured using a suite of software that explicitly modeled the chemical compositions of various constituents and their byproducts for a watercement ratio of 0.4. An evolved microstructure of 50x50x50 micron3 volume of Portland cement product was modeled as a representative volume element RVE through a general purpose finite element code, ABAQUS . The heterogeneity induced shock decay phenomenon under compression in this 50-micron size cube due to an OFHC Copper flyer plate impact is analyzed.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Construction Equipment, Materials and Supplies
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE