PACA wishes to thank our 2025 Platinum Sponsors for their generous support and commitment this year!

• ASGCO Complete Conveyor Solutions
• Babst Calland
• Cleveland Brothers Equipment Co., Inc.
• Commonwealth Equipment Corporation
• Continental Placer, Inc.
• Conviber, Inc.
• East Rock Solutions
• Groff Tractor & Equipment
• Kemper Equipment, Inc.
• Maurer & Scott Sales, Inc.
• Mellott Company
• SIKA Corporation

5135 ASR Letter to Bulletin 42 Sources

Please see attached letter regarding PennDOT’S Alkali Silica Reaction (ASR) to Bulletin 42 Sources with attached Field Observations and Questionnaire.

If you have any questions, please contact either PennDOT’s Michael E. Matthews, P.G., Unit Manager – Aggregate, Cement, Concrete and Soils, at 717.787.7268 or [email protected] or PACA’s James M. Casilio, P.E., Director of Technical Services, at 610.730.2385 or [email protected]. 

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© 2025 Pennsylvania Aggregates and Concrete Association