Cemenet CO2 micrograph

Benchmark Well Cement / CO2 Publication Surpasses 200 Citations

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  • 1:10PM Mar 09, 2015
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According to Google Scholar, “Degradation of Well Cement by CO2 under Geologic Sequestration Conditions,” a research paper jointly authored by the U.S. Department of Energy, Carnegie Mellon University, and RJ Lee Group, has now been cited more than 200 times in scientific journals. The first paper in a series of three, this publication focuses on […]

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Petrography

The Top 10 Things to Tell Your Petrographer

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  • 9:32AM Dec 18, 2014
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If you want solid answers to your concrete questions, a petrographer can help. Petrographers use a combination of visual inspection, microscopy, and chemical techniques to examine concrete cores. These analyses provide a basis for understanding the condition of the material, why it failed, or the material’s remaining service life. If you are submitting concrete cores, […]

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Petrography is an important part of bridge construction

What Can Petrographic Analysis Tell You About the Condition of Concrete Structures?

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  • 3:59PM Dec 09, 2014
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According to a 2013 Report Card for America’s Infrastructure, 1 in 9 bridges in metropolitan areas are structurally deficient. The estimated investment needed to eliminate the backlog of deficient bridges by 2028 is $20.5 billion annually—that’s $8 billion more per year than currently invested. Recently, CBS addressed the topic of crumbling roads and bridges in […]

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RJ Lee Group Welcomes Dr. Brian Strazisar as Principal Investigator for Construction Materials

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  • 2:48PM Jun 13, 2014
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RJ Lee Group, Inc. continues to strengthen its Technical Consulting group with the appointment of Dr. Brian Strazisar to the position of Principal Investigator in the practice area of construction materials. Dr. Strazisar’s technical background and recent research, involving the chemical and mechanical stability of wellbore cement and oil and gas production, will play a […]

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ACR Concrete Controversy Continues – Investigation Indicates that ASR is to Blame

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  • 6:35PM Dec 04, 2013
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Query: Can the main mechanism of concrete distress and cracking in a concrete made with ACR-susceptible aggregates be caused by ASR?? Fact: Alkali Carbonate Reaction (ACR) results when brucite, formed in concrete made with dolomitic (ACR-susceptible) aggregate, crystallizes and expands. Fact: Alkali Silica Reaction (ASR) occurs over time when the alkalis in cement react with […]

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Webinar: Material Challenges in Maintaining Aging Infrastructure – Reinforced Concrete Structures

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  • 12:03PM Nov 20, 2013
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According to the 2013 Report Card published by the American Society of Civil Engineers (ASCE), one in nine bridges in the United States is structurally deficient. Tight budgets require efficiencies when selecting work to be done and so priority is often given to those tasks that will make these structures last as long as possible. […]

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Materials Science Bridges the Gap between Catastrophic Event and its Root Cause

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  • 12:58PM Jul 25, 2013
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Notable catastrophic bridge collapses in Minneapolis and Washington State have garnered public attention related to the structural integrity of many of the nation’s bridges. More cause for concern is the 2013 Report Card published by the American Society of Civil Engineers which states that one in nine bridges in the United States is structurally deficient. […]

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Floor Failure Analysis Reiterates the Need to Consider a Variety of Factors

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  • 2:14PM Oct 14, 2012
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Alkali-silica reaction (ASR) is often the cause of debonding and blistering of epoxy coatings; however, the presence of ASR gel doesn’t necessarily mean that it is responsible for any degradation. Near-surface alkali reaction (NSAR) gel has been reported to have much the same effects. Like ASR, it appears as blistering in the low permeability surface […]

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Flawed Freeze-Thaw Testing Standards Unreliable for Predicting Concrete Tie Failures

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  • 2:21PM Jul 30, 2012
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The scientific world has achieved remarkable discoveries and innovations responsible for the modern technology we rely on today. Despite our scientific sophistication, the ability to manipulate time—speed it up, slow it down, reverse it—remains largely a figment of our collective imagination, or a plot vehicle in a science fiction novel. This is not a ground-breaking […]

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