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Federal Highway Administration
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Washington, DC 20590
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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

Overview

 

Research and Development (R&D) Project Sites

Project Information
Project ID:   FHWA-PROJ-13-0032
Project Name:   Protocols for Evaluating the Properties and Performance of Alternative Cementitious Materials (ACMs*) for Use in Highway Applications
Project Status:   Active
Start Date:  January 15, 2013
End Date:  December 31, 2017
Contact Information
Last Name:  Ardani
First Name:  Ahmad
Telephone:  202-493-3422
E-mail:  ahmad.ardani@dot.gov
Office:   Office of Infrastructure Research and Development
Team:   Pavement Materials Team [HRDI-10]
Program:   Innovative Pavement Research and Deployment
Laboratory:   Concrete Laboratory
Project detail
Roadmap/Focus area(s):   Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:   A multidisciplinary approach involving chemical, petrographic, and physical characterization techniques will be applied to the characterization of ACMs. The tasks aim to develop a protocol for systematically and expeditiously evaluating mixtures containing ACMs (for example, CeraTech and Solidia cements). The principal objectives are to evaluate their structural and durability performance and to identify properties and test methods that will assure their quality and performance for highway applications. To achieve the objective of this study, the research team envisions the following steps:   Evaluation of rheology, setting, mechanical properties, volume change, transport properties and durability using traditional and new emerging test methodsChemical analysis of the mixtures, which entails x-ray florescence, x-ray diffraction, scanning electron microscopy, and Thermogravimetric analysis.Petrographic analysis, which includes microscopic examination and analysis of the constituents of hardened cementitious materials.  Alternative Cementitious Materials (ACMs*) are materials that have little or no portland cement.
Background Information:   Today’s transportation infrastructure, while providing for efficient, convenient, and safer movement of people and goods, is not as sustainable as it could be. There are adverse impacts on the environment through the production of the cement for use in infrastructure construction, rehabilitation, and maintenance. Nearly one ton of carbon dioxide (CO2) is emitted into the atmosphere for every ton of cement produced. Globally, up to seven percent of the total CO2 produced is from the production of cement. As the concept of sustainability gains momentum, many transportation agencies, in an effort to reduce the CO2footprint and to reduce the need for raw materials, are willing to explore using more supplemental cementitious materials (SCMs) and other emerging alternative cementitious materials (ACMs) with little or no cement. What lacks is a sound, practical protocol that can be used to characterize these different cementitious mixtures and their impact on the performance of rigid pavement.
Product Type:   Article
Promotional materials
Research report
Techbrief
Technical report
Test Methodology:   Characterization of Alternative Cementitious Materials using Dynamic Shear Rheometer (DSR), Isothermal Calorimeter, x-ray diffraction (XRD), x-ray florescence (XRF), Thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and petrographic analysis.
Expected Benefits:   The expected benefit is the development of an environmentally friendly rigid pavement that is sustainable and cost effective.
Deliverables: Name: Guidelines and Protocol.
Product Type(s): Research report, Article, Promotional materials, Techbrief, Technical report
Description: The deliverable is a suite of protocols that can be used to properly characterize a variety of different cementitious materials and examine their suitability/application for use in rigid pavements.
Project Findings:   Based on the limited data that have been acquired on the use of Solidia cement, it appears that its mechanical properties are equivalent or better than that of ordinary portland cement. Petrographic examination of the cores revealed that Solidia cement is primarily composed of glassy materials (perhaps slag) and crystalline materials (Wollastonite). X-ray diffraction and x-ray fluorescence examination of the constituents also confirmed presence of these materials.
FHWA Topics:   Research/Technologies--Turner-Fairbank Highway Research Center (TFHRC)
TRT Terms:   Durability
Infrastructure
Cement
Research
Construction
Rehabilitation
Maintenance
Pavements
FHWA Disciplines:   Pavement and Materials
Subject Areas:   Materials
Pavements
Research

 

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