An official website of the United States government
Here’s how you know
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.
In response to the COVID-19 pandemic, hospitals across the United States are disinfecting N95 masks by placing them in repurposed rooms or shipping containers
When you suffer a fall, an on-the-field collision or some other traumatic blow, the first thing the doctor will do is take an X-ray, CT scan or MRI to determine
For some, it is a shocking revelation. But most Americans eventually come to accept the fact that a “two by four” board is actually 1.5 inches by 3.5 inches (38
Guided in part by strategies and procedures developed by the National Institute of Standards and Technology (NIST) for creating effective and affordable
The Virtual Cement and Concrete Testing Laboratory (VCCTL) project develops and integrates state-of-the-art computational materials science tools into a user
Surface damage caused by environmental and/or mechanical stresses can lead to the release of nanofillers incorporated within polymer nanocomposites, leading to
The construction industry is becoming increasing reliant on pumping for the placement of concrete; thus, implying that a concrete must have the desired early
The use of thermal insulation is a primary approach to reducing heating and cooling loads in buildings, which account for 42 % and 24 % of energy consumption in
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
Additive manufacturing (AM) with cement-based materials is an emerging technology that has the potential to revolutionize concrete construction. The placement
Christopher C. White, Donald L. Hunston, Kar tean Tan
The non-linear viscoelastic properties of a model sealant were measured using stress relaxation tests conducted at different strain levels, x. Some specimens
Prediction is based on a one-dimensional finite difference solution of Fick's second law of diffusion, with a variable external chloride concentration and a two
(Return to Cement Hydration and Degradation Modeling Software)
Accurate quantitative data on cement and clinker microstructure images can prove valuable for
(Return to Cement Hydration and Degradation Modeling Software)
The purpose of this form is to estimate the results of a rapid chloride permeability test
In the artificial ultraviolet (UV) weathering of materials, a need exists for weathering devices that can uniformly illuminate test specimens with a high level
The Large Aperture Scanner (LAS) scans a radar transceiver over a 5 meter by 20 meter aperture. Image reconstruction techniques enable a three-dimensional
The 1-meter guarded hot-plate apparatus measures thermal conductivity of building insulation. This facility provides for absolute measurement of thermal