Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Buildings & Construction

Building materials

Search Publications

Search Title, Abstract, Conference, Citation, Keyword or Author

Title

Author

NIST Pub Series

Report Number

Published Date

Min

Max

Displaying 201 - 225 of 924

Chloride Diffusivity in Hardened Cement Paste from Microscale Analyses and Accounting for Binding Effects

August 5, 2016

Author(s)

Pietro Carrara, Laura De Lorenzis, Dale P. Bentz

We study the diffusion of chloride ions in hardened cement paste (HCP) under steady-state conditions and accounting for the highly heterogenous nature of the material. The HCP microstructures are obtained through segmentation of X-ray images of real

Particle size-dependent environmental release of semiconductor nanocrystals from free-standing polymer nanocomposite films

May 31, 2016

Author(s)

Li Piin Sung, Karthik V. Pillai, Patrick Gray, Reiner Bleher, Timothy V. Duncan

Concomitant with the development of polymer nanocomposite (PNC) technologies across numerous industries is an expanding awareness of the uncertainty with which engineered nanoparticles embedded within these materials may be released into the external

Three-Phase Statistically Equivalent Periodic Unit Cells for Protein-Bound Soils

May 25, 2016

Author(s)

Edward Garboczi, Isamar Rosa, Michael Lepech, Henning Roedel, David Loftus

This work focuses on a novel class of composites that can be produced extraterrestrially, or in situ, by desiccating a mixture of soil, water, and protein binder to create a strong, versatile material. To date, experimental tests of mechanical properties

Calibration of rheometers for cementitious materials

May 16, 2016

Author(s)

Chiara F. Ferraris, Nicos Martys, William L. George, Edward J. Garboczi, Alex Olivas

The calibration of rheometers to determine the rheological properties of cement based materials ranging from cement paste to concrete cannot be done using standard oils as they are cost prohibitive and do not possess sufficient granularity to test slip

Kinetics of Photodegradation and Nanoparticle Surface Accumulation of a Nanosilica/Epoxy Coating Exposed to UV Light

April 11, 2016

Author(s)

Li Piin Sung, Justin Gorham, Deborah Jacobs, Savelas A. Rabb, Lee L. Yu, Tinh Nguyen

Temperature effect on the kinetics of photodegradation, surface accumulation of nanoparticles, and nanoparticle release in an epoxy nanocoating exposed to ultraviolet light (UV) was investigated. A model epoxy coating containing 5 % untreated nanosilica

Advances in shape measurement in the digital world

March 22, 2016

Author(s)

Edward Garboczi, Xiaodong Jia

The importance of particle shape in affecting the behaviour of powders and other particulate systems has long been recognised, but until fairly recently particle shape information has been rather difficult to obtain and use compared to its more well-known

The chemical, mechanical, and physical properties of 3-D printed materials composed of TiO2-ABS nanocomposites

March 1, 2016

Author(s)

Zeeshan Ahmed, Matthew Skorski, Jake Esenther, Abigail E. Miller, Hartings Mathew

3-D printing has captured the imagination of many and has enabled a culture of makers. The ability of this process to generate intricate structures from polymer filaments has led to interest from home enthusiasts as well as laboratory scientists. From a

On the Relation of Setting and Early-Age Strength Development to Porosity and Hydration in Cement-Based Materials

February 10, 2016

Author(s)

Didier Lootens, Dale P. Bentz

Previous research has demonstrated a linear relationship between compressive strength (mortar cubes and concrete cylinders) and cumulative heat release normalized per unit volume of (mixing) water for a wide variety of cement-based mixtures at ages of 1 d

Strategies for scanning electron microscopy sample preparation and characterization of multiwall carbon nanotube polymer composites

January 20, 2016

Author(s)

Andras Vladar

This guideline presents methods for the preparation and investigation of samples of multiwall carbon nanotube-polymer composites by scanning electron microscopy. It is focused on multiwall carbon nanotube epoxy composite, but the strategy should be

Minimizing Paste Content in Concrete Using Limestone Powders  Demonstration Mixtures

January 14, 2016

Author(s)

Dale P. Bentz, Scott Z. Jones, Didier Lootens

In recent years, there has been great interest in reducing the cement content of concrete, due to the high energy and carbon dioxide footprints of cement production. There are numerous (waste) materials that can be substituted for cement in the concrete

Mechanical properties of single-walled carbon nanotube reinforced polymer composites with varied interphases modulus and thickness: A finite element analysis study

January 8, 2016

Author(s)

Dilip K. Banerjee, Tinh Nguyen, Tze-Jer Chuang

The role of the interphase on mechanical performance of glassy polymer/single-walled carbon nanotube composites has been investigated by finite element (FE) method. The matrix and the interphase are modeled using continuum elements and the nanotube is

Comparative study of methods to measure the density of Cementitious powders

December 14, 2015

Author(s)

Michelle A. Helsel, Chiara F. Ferraris, Dale P. Bentz

The accurate measurement of the density of hydraulic cement plays an essential role in the determination of concrete mixture proportions. As more supplementary cementitious materials (SCM), such as fly ash and slag, or cement replacement materials, such as

Effect of the Interface Moisture Content on the Bond Performance between a Concrete Substrate and a Non-Shrink Cement-Based Grout

December 9, 2015

Author(s)

Igor de la Varga, Jose Munoz, Dale P. Bentz, Benjamin Graybeal

Prefabricated Bridge Element and System (PBES) construction commonly relies on field-cast grout-type materials to complete the connections between precast concrete elements. The interface bond between the grout and the substrate concrete can be a key

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

Was this page helpful?