A Study of Engineering Properties of a Clay Modified by Ash and Slag
Fly ash from power plants and slag from steel mills are two industrial solid wastes. These wastes can be utilized as soil stabilizers. In this study, a clay with low plasticity is mixed...
Perimeter Load Transfer in Drilled Shafts in the Eagle Ford Formation
Results of six full-scale compression loading tests at four sites in the Dallas area are considered. Compressive strengths (qc) of the rock varied...
On the Elasto-Plastic Behavior of an Unsaturated Silt
Due to technical difficulties related to the control and measurement of the suction in unsaturated soils, few experimental data on the mechanical behavior of those soils exits. The paper...
Evaluation of Compressive Strength for High-Strength Concrete by Pulse Velocity Method
Development of compressive strength and pulse velocity for high-strength concrete from the age of 5 hours are studied in relation to cementitious material types and curing conditions....
Quantitative Stereology of Concrete Microcracking
Stereological methods enable extrapolation of quantitative microcrack characterization from two dimensions to three dimensional space. However, because these quantifying techniques are...
Constitutive Modeling and Simulation of Energy Absorbing Polyurethane Foam Under Impact Loading
The compressive-stress strain response of polyurethane foam under uniaxial compressive impact loading has been studied. The development of a uniaxial constitutive model from strain rate...
Automated Identification of Compression-Induced Cracking in Cement Paste
The development of image analysis techniques to identify cracks using scanning electron microscope images of hydrated cement paste is described. Cracks are identified based on both the...
The Effective Stress Path for Soil at High Pressure
The effect of increasing stiffness in the soil skeleton on the effective stress path in undrained triaxial compression tests is experimentally examined and found to not be significant....
Constitutive Equation for Granular Material by Hypoelasticity
Constitutive equations for soil based upon the incremental theory of hypoelasticity are proposed in this paper to account for the stress path dependency and dilatant behavior of soil....
A Cumulative Failure Criterion of Concrete Under Uniaxial Dynamic Compressive Loading
It has been previously reported that the strength and critical strain of concrete under impact increase with strain rate, but neither of them can predict failure. A cumulative damage parameter...
Mechanical Properties of High Performance Concretes
This paper presents some of the initial results of a 4-year research project on mechanical properties of high performance concretes with particular reference to highway applications. High...
An Expert System for Impeller Mechanical Design and Analysis
Impeller is the most critical component of centrifugal compressors. The mechanical efficiency and durability of the impeller determines the performance of the compressors. The shapes and...
Compressive Strength and Characterization of Failure Modes for Polymer Concrete
The effect of aggregate type, polymer content and specimen dimensions on the compressive strength and failure modes of a polyester polymer concrete (PC) was investigated. Two aggregate...
Constitutive Modeling of Slurry Infiltrated Fiber Concrete (SIFCON)
Slurry Infiltrated Fiber CONcrete (SIFCON) is a unique material, containing 5 to 18 percent, by volume, of steel fibers; in contrast, standard Fiber Reinforced Concrete (FRC) usually contains...
Sintering of Lunar Glass and Basalt
Sintering of the regolith has been proposed as a method for producing construction materials from local resources at a lunar base. Applications for lunar 'bricks' include road beds, foundations,...
Simple and Efficient Methods to Produce Construction Materials for Lunar and Mars Bases
A microwave heating method and a cold press method are proposed as simple ways to produce construction materials on the Moon and Mars. The present experiment on the microwave heating method...
High Strength, Low Permeability Garage Rehab Concrete
Physical and engineering properties of high strength structural lightweight concrete used to replace deteriorated concrete in garage structure rehabilitation programs are reported. Structurally...
Bond Strength of Straight GFRP Rebars
An overview of a study on bond of straight Glass-fiber-reinforced-plastic (GFRP) rebars to concrete is presented. The 54 specimens to be tested include several variables, such as the mode...
Visco-elasticity and the Compressive Failure of Polycrystalline Ice
The analysis of the visco-elasticity of polycrystalline ice is addressed. Experimental results on isotropic and anisotropic polycrystalline ice are presented, which indicate that intracrystalline...
The Ductile-Brittle Transition in Ice & Size Effect
This paper considers the ductile to brittle transition in ice under compression. Two criteria, one phenomenological and the other more physical, are presented for the transition strain...
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