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Materials

Concrete / cement

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Displaying 76 - 100 of 291

Relating the Electrical Resistance of Fresh Concrete to Mixture Proportions

March 5, 2018
Author(s)
K H. Obla, Rongjin Hong, Stuart Sherman, Dale P. Bentz, Scott Jones
Characterization of fresh concrete is critical for assuring the quality of our nation's constructed infrastructure. While fresh concrete arriving at a job site in a ready-mixed concrete truck is typically characterized by measuring temperature, slump, unit

A Multiscale Framework for the Prediction of Concrete Self-Desiccation

March 1, 2018
Author(s)
Madura Pathirage, Dale P. Bentz, Giovanni Di Luzio, Enrico Masoero, Gianluca Cusatis
Cement hydration in concrete and mortar has been studied thoroughly over the past 50 years. To fully understand hydration in concrete and predict the evolution of the hygral, thermal, and mechanical properties at the structural level, one needs to study

Evaluating the Hydration of High Volume Fly Ash Mixtures Using Chemically Inert Fillers

December 6, 2017
Author(s)
Igor de la Varga, Javier Castro, Dale P. Bentz, Franco Zunino, Jason Weiss
Fly ash is frequently used as a replacement for cement in concrete. However, questions remain regarding the influence that fly ash has on the hydration of cement. This paper examines physical aspects (e.g., surface nucleation, cement particles spacing) and

Role of Materials Science in the Resilience of the Built Environment

December 5, 2017
Author(s)
Stephanie S. Watson, Chiara C. Ferraris, Jason D. Averill
The resilience of U.S. communities, defined as the "ability to withstand and recover rapidly from disruptive events," is directly dependent upon the ability of the built environment to maintain and support the functions upon which modern society has come

Final Report for Project BAA No. DTFH61-08-R-00034: Greatly Increased Use of Fly Ash in Hydraulic Cement Concrete (HCC) for Pavement Layers and Transportation Structures (Phase II - Tasks 4 and 5)

November 17, 2017
Author(s)
Igor de la Varga, Dale P. Bentz, Jason Weiss
This report serves as the final report for a research project focused on increasing the usage of fly ash in transportation infrastructure. Specifically, this report addresses two phases of the research dealing with internal curing and early-age cracking

Certification of SRM 2493:Standard Reference Mortar for Rheological Measurements

October 4, 2017
Author(s)
Alex Olivas, Chiara C. Ferraris, Nicos Martys, Edward Garboczi, Blaza Toman, William L. George
Rheological measurements are often performed using a rotational rheometer. In this type of rheometer, the tested fluid is sheared between two surfaces, one of which acts as the rotating surface [1]. Usually, the rotational velocity is imposed and the

Bond Enhancement of Repair Mortar via Biodeposition

September 4, 2017
Author(s)
Didier Snoeck, Jianyun Wang, Dale P. Bentz, Nele De Belie
The bond between repair mortars and existing concrete substrates is critical for the long-term performance and durability of the repaired structure. The carbonation state of the substrate is one of the parameters that may affect this bond strength. The

Topological Controls on the Dissolution Kinetics of Glassy Aluminosilicates

August 17, 2017
Author(s)
Tandre Oey, Isabella Pignatelli, Yingtian Yu, Narayanan Neithalath, Jeffrey W. Bullard, Mathieu Bauchy, Gaurav Sant
Fly ash which encompasses a mixture of glassy and crystalline aluminosilicates is an abundant supplementary cementitious material (SCM), valuable for replacing ordinary portland cement (OPC) as the binder fraction in concrete. As a result of the demand for