Publications

Displaying 1 - 25 of 148

Material Research Support for the Structural Performance of Nuclear Power Plant Concrete Structures Affected by Alkali-Silica Reaction

May 16, 2022

Author(s)

Kenneth A. Snyder, Richard Eason, Peter Bajcsy, Steven Feldman

How Do Specific Surface Area and Particle Size Distribution Change When Granular Media Dissolve?

February 14, 2021

Author(s)

Jeffrey W. Bullard, Qingxu Jin, Kenneth A. Snyder

The measured dissolution rate of a granular medium depends on its surface area and how the surface area changes during the course of the measurement. Moreover, the assumption that the specific surface area either remains constant or initially increases

Approaches to Training Multi-Class Semantic Image Segmentation of Damage in Concrete

May 14, 2020

Author(s)

Peter Bajcsy, Steven B. Feldman, Michael P. Majurski, Kenneth A. Snyder, Mary C. Brady

This paper addresses the problem of creating a large quantity of high-quality training image segmentation masks from scanning electron microscopy (SEM) images of concrete samples that exhibit progressive amounts of degradation resulting from alkali-silica

Comparison of 2-D and 3-D shape analysis of concrete aggregate fines from VSI crushing

March 1, 2017

Author(s)

Edward J. Garboczi, Kenneth A. Snyder, Rolands Cepuritis, Stefan Jacobsen

The shape of concrete aggregate fines, with particle sizes between 3 µm and 250 µm, produced by high-speed vertical shaft impact (VSI) crushing of 10 different rock types from quarries in Norway, has been studied by both dynamic image analysis (DIA), which

Leaching of Conductive Species: Implications to Measurements of Electrical Resistivity

February 20, 2017

Author(s)

Robert Spragg, Scott Jones, Yiwen Bu, Yang Lu, Dale P. Bentz, Kenneth A. Snyder, Jason Weiss

Electrical tests have been used to characterize the microstructure of porous materials, the measured electrical response being determined by the contribution of the microstructure (porosity and tortuosity) and the electrical properties of the solution

4SIGHT- A Concrete Degradation Computer Code for Performance Assessment of Nuclear Waste and Decommission Facilities

February 19, 2017

Author(s)

Kenneth A. Snyder, J Philip, H Graves

The 4SIGHT computer code facilitates the performance assessments (PA) of nuclear waste and decommissioning facilities that employ concrete as the principal engineered barrier to isolate waste. Such facilities include those for Low Level Waste (LLW)

Final Report for:EPA: LAG No. DW-13-93903501-0 Expanding a Tool for Predicting Chloride Diffusivity in Concrete So It Can Be Used by Manufacturers to Evaluate the Durability of Concrete Made With Blended Cements. Part I: Characterizing Blended Cement...

February 19, 2017

Author(s)

X Feng, Edward Garboczi, Jeffrey W. Bullard, Kenneth A. Snyder, Paul E. Stutzman, T Mason

This report summarizes a project that dealt with the characterization of a fly ash and fly-ash blended cement material, so that these could be incorporated into the Virtual Cement and Concrete Testing Laboratory (VCCTL) software. The information generated

Modeling Diffusive Ionic Transport in Concentrated Alkaline Cementitious Pore Solutions at 25 C: Comparison to Published Binary Salt Data

February 19, 2017

Author(s)

Kenneth A. Snyder, Joseph B. Hubbard, J Marchand

The applicability of a Nernst-Planck equation to characterizing diffusive transport in concentrated electrolytes typically found in cementitious systems is investigated using published experimental data for the collective diffusion coefficient of binary

The Maximum Relative Error in the Filliben Approximation for Uniform Order Statistic Medians

February 19, 2017

Author(s)

Kenneth A. Snyder

The relative error of the Filliben [Technometrics, 17, 111, 1975] approximation for uniform order statistic medians is calculated from the ratio of the error to the mean spacing between medians. The true uniform order statistic medians were calculated by

EVALUATING THE INTRINSIC PERMEABILITY OF CEMENTITIOUS MATERIALS USING A FALLING HEAD GAS PERMEAMETER

November 24, 2015

Author(s)

Kenneth A. Snyder, Chiara Villani, Jason Weiss

This paper examines the pressure-dependent gas permeability as measured using a falling head gas permeameter. A series of experiments were performed on mortars with varying mixture proportions, and measurements were made with different initial applied

Service Life Modeling of Reinforced High Volume Fly ash (HVFA) Concrete Structures Containing Cracks

May 1, 2015

Author(s)

Scott Z. Jones, Dale P. Bentz, Kenneth A. Snyder, Nicos Martys, Daniel S. Hussey, David L. Jacobson

Chloride ions, resulting from the application of de-icing salts travel through the concrete matrix by diffusion in a connected pore network. Cracks in concrete facilitate chloride movement by allowing ions to bypass the concrete matrix and travel directly

Design and Performance of Ternary Blend High-Volume Fly Ash Concretes of Moderate Slump

March 27, 2015

Author(s)

Dale P. Bentz, Scott Z. Jones, Kenneth A. Snyder

One approach to increasing the sustainability of concrete construction is to replace a significant portion of the ordinary portland cement (OPC) with a supplementary cementitious material, such as fly ash. This paper presents mixture proportions and

Surface and Uniaxial Electrical Measurements on Layered Cementitious Composites having Cylindrical and Prismatic Geometries

July 24, 2014

Author(s)

Robert Spragg, Scott Jones, Kenneth A. Snyder, Dale P. Bentz, Chiara Villani, Jason Weiss

Electrical measurements are becoming a common method to assess the transport properties of concrete. For a saturated homogenous system, the surface resistance and the uniaxial resistance measurements provide equivalent measures of resistivity once geometry

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