Flextural and Tensile Properties of Thin very High Strenth Fiber Reinfoced Concrete Panels







Modular Protective Systems for Future Force Assets

Flexural and Tensile Properties of Thin, Very High-Strength, Fiber-Reinforced Concrete Panels

Michael J. Roth

Geotechnical and Structures Laboratory U.S. Army Engineer Research and Development Center 3909 Halls Ferry Road Vicksburg, MS 39180-6199



ERDC/GSL TR-08-24 September 2008



1.1 Background



INTRODUCTION

As part of the continued development of new and innovative construction

m

aterials for applications in civil, structural, and military engineering, high performance

concrete has maintained itself as an area of directed focus. Advancements in the science

and technology of cementitous materials have brought about mesoscale to sub-microscale

material engineering (through development of concepts such as particle packing theory,

macro-defect free concrete, heat and pressure treatment to facilitate molecular structure

manipulation, and microfiber inclusion to inhibit growth and localization of microcracks),

and have resulted in materials with unconfined compressive strengths as high as

29,000 psi (200 MPa) or greater [1-4]. High-strength and ultra-high-strength concrete,

with unconfined compressive strengths of 10,000 psi (69 MPa) to 25,000 psi (172 MPa)

and greater, have experienced continued growth in commercial application as the

community’s state of knowledge and production capability have advanced [5-8].

In conjunction with enhancement of unconfined compressive strength, significant

research has been conducted to develop means of improving the tensile characteristics of

cementitous materials. The classical approach of incorporating discrete reinforcing steel

has been augmented with the capability to reinforce with other, more advanced, materials

such as ultra-high tensile strength steel meshes (460 ksi (3.2 GPa) or greater),



Download

*