As this winter mercifully begins to come to a close, and with the spring rush just around the corner, we wanted to provide this update on some recent activities as well as looking ahead to some issues that we will face.
From February 9-11, PennDOT hosted the Mid-Atlantic Quality Assurance Workshop QAW. The focus of this conference is to bring together DOT material personnel and industry from the Mid-Atlantic states. Mike Matthews and Susan Armstrong put together and moderated the concrete session. Presentations included those from PACA members Ben Lentine, Heidelberg Materials and Mark Moyer, New Enterprise Stone & Lime Co., Inc.
The ASR research that we're currently conducting was featured prominently by Dr. Farshad Rajabipour, chair of the civil engineering department at Penn State, along with covering the additional concrete research that they're conducting. Dr. Jose Munzo with the FHWA Turner Fairbanks Research Center covered the T-Fast and Alkali Threshold Test for evaluating aggregates for ASR potential. Dr. Leandro Sanchez with the University of Ottawa presented their research on the correlation (or lack thereof) of the current ASR test methods. Both Dr. Munoz and Dr. Sanchez presented new models for determining mitigation levels to reduce the occurrence of ASR. These approaches represent the beginning of a next generation approach to ASR. We look forward to continuing to work with these three leaders in ASR research and are confident our collaboration with them and the information gained on our exposure block study will further their research and provide practical improvements to the durability and performance of our materials.
Over the past two years there have been significant changes to the cement and SCM requirements within AASHTO and ASTM. The PennDOT/PACA Cement and SCM workgroup have been discussing these changes. This work group is working towards identifying unified reporting requirements that can:
- Meet these new changes.
- Reduce redundancy within the current requirements.
To accomplish this the work group is working towards unifying the information needed for mill test reports with the goal of eliminating the TR7000 forms. The next meeting of this work group is scheduled for March 9 at 10 a.m. with a PennDOT LTS virtual option.
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