February Dinner Meeting
Tuesday, February 21st
Maggiano's King of Prussia
Upcoming Meetings & Events
Lehigh Valley Sporting Clay Shoot
INTERNATIONAL CONCRETE REPAIR INSTITUTE
DELAWARE VALLEY CHAPTER
March Virtual Meeting:
Near Surface Aggregate Reactivity: What We Know
March 24, 2021
Alkali-silica reaction (ASR) is a generally destructive reaction between coarse or fine concrete aggregate containing reactive silica - and hydroxyl ions and alkalis in solution within concrete. Most concrete aggregates are not reactive or contain silica and are not receptive to the reaction due to generally low alkalis, the use of ASR-mitigating pozzolans, and the ambient conditions the concrete is in. The introduction of non-breathing coatings and floorings change those conditions and can initiate ASR in the near-surface regions of the concrete. NSAR or near-surface aggregate reactivity, as first coined by Mr. Peter Craig, is occurring in various areas of the USA; including the always troublesome shales in Midwestern concrete sands and extrusive volcanic aggregates in the SW USA.
Gerard Moulzolf, P.G.
Gerard Moulzolf, P.G. is a Geologist and Principal Petrographer, as well as a Vice President for American Engineering Testing, Inc. (AET) where he manages the Petrographic and Chemistry Group. He is a graduate of the University of Minnesota – Duluth with a bachelor’s degree in Geology and is a professionally licensed geologist in the states of Minnesota and Florida. Gerard is a director of ASTM C-9 Concrete and Aggregates. He is currently secretary of committee 9.20 Normal Weight Aggregates, a former Director on the board of the International Concrete Repair Institute, and a member of ACI Committee 201. He is also a past president of the former Iowa-Minnesota Chapter of ACI and the Minnesota Concrete Council – an organization dedicated to cast-in-place concrete. He currently is active
in many other concrete-related industry groups. His experience of 30 years includes petrographic work in at least 10,000 projects throughout the United States and numerous foreign countries. Materials regularly studied include: cast-in-place and pre-cast concrete; coating and flooring failures, mortar, block, and stone, sand and gravel. He possesses extensive experience in materials related distress such as: alkali silica reaction (ASR), delayed ettringite formation (DEF), corrosion of steel reinforcement, and cyclic freeze-thaw.
Wednesday, March 24th, 2021
Virtual Zoom Meeting
Presentation: 12:00-1:30 PM
$15/person for ICRI Members
$25/person for Non-Members
Grubhub giftcards will be provided to those who attend!
If you are a Gold or Silver Sponsor please email Ken Destefano for registration.
If you will be paying cash or check, please contact Mark Meighan at 215-920-2993 or via email. Checks made payable to "Delaware Valley ICRI".
Contact Chris Hopkins for additional sponsorship information at 610-532-5391 or via email.