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Displaying 276 - 292 of 292

Internal Curing Improves Concrete Performance throughout its Life

September 1, 2009

Author(s)

Ryan Henkensiefken, Javier Castro, Haejin Kim, Dale P. Bentz, Jason Weiss

Internal curing (IC) provides a set of water reservoirs within the concrete to prevent self-desiccation and promote hydration. While early research in this area focused on reductions in early-age deformation and cracking, recent efforts have demonstrated

Volume Change and Cracking in Internally Cured Mixtures Made with Saturated Lightweight Aggregate under Sealed and Drying Conditions

August 3, 2009

Author(s)

Ryan Henkensiefken, Dale P. Bentz, Tommy Nantung, Jason Weiss

Increased occurrences of early-age shrinkage cracking in low water to cement ratio (w/c) concrete have spawned innovative developments in mixture design that reduce the risk of cracking. One such development is internal curing, which utilizes the inclusion

Comprehensive Evaluation of AIMS Texture, Angularity, and Dimension Measurements

July 3, 2009

Author(s)

Enad M. Mahmoud, Leslie L. Gates, Eyad A. Masad, Sinan T. Erdogan, Edward Garboczi

Aggregates are the most widely used construction materials in the world in structures built from both asphaltic and portland cement concrete composites. The performance of these composites is affected by aggregate shape characteristics (e.g., angularity

Predicting the Permeability of Pervious Concretes from Planar Images

May 1, 2009

Author(s)

Milani S. Sumanasooriya, Dale P. Bentz, Narayanan Neithalath

This paper discusses the reconstruction of three-dimensional material structures of pervious concretes using two-dimensional digital images obtained from actual specimens, and computational permeability predictions using these reconstructed three

Relationship Between Engineering Properties, Mineralogy, and Microstructure in Cement-Based Hydroceramic Materials Cured at 200 C to 350 C

March 1, 2009

Author(s)

Konstantinos Kyritsis, Christopher Hall, Dale P. Bentz, Nicola Meller, Moira A. Wilson

Cement-based materials used to seal geothermal or deep oil wells are exposed to severe conditions. Optimizing engineering properties such as strength and permeability is therefore very important. We have synthesized hydroceramic materials for such

Stress chains formation under shear of concentrated suspension

July 7, 2008

Author(s)

Didier Lootens, Nicos Martys, William L. George, Steven G. Satterfield, Pascal Hebraud

Results comparing experiments on a model system of mono-disperse silica-particles with the numerical simulation of highly concentrated suspension of spherical particles subject to a constant rate of strain are presented. Giant fluctuations of the shear

Characterization and Modeling of Pores and Surfaces in Cement Paste: Correlations to Processing and Properties

February 15, 2008

Author(s)

Hamlin M. Jennings, Jeffrey W. Bullard, J Thomas, J Andrade, J. Chen, George W. Scherer

Prediction of Elastic Properties of Concrete Using the Virtual Cement and Concrete Testing Laboratory

November 30, 2007

Author(s)

Sinan Erdogan, Edward Garboczi, Jeffrey W. Bullard

Feasibility on Using a Concrete Mixing Truck as a Rheometer

June 14, 2006

Author(s)

S Amziane, Chiara C. Ferraris, E Koehler

Fresh concrete properties are crucial for the performance of the concrete in its hardened state. The measurement of workability is usually done using a simple slump test. This test, although widely used for almost 100 years, does not provide a full picture