About Us

Beton Consulting Engineers is a consulting firm specializing in concrete materials and construction. Led by Dr. Kevin MacDonald and an associated team of consultants in the US and Canada, Beton Consulting Engineers can enhance your designs, enable constructability of projects incorporating low embodied energy and low emissions concrete and prepare specialist specifications.


  • Sustainability
  • Thermal Control Plans
  • Mixture Proportioning  SCC and High Volume Pozzolanic Materials
  • Specialist Specifications
  • Pavement Design  Parking Lots to Highways
  • Construction Planning
  • Petrographic Examination
  • Expert Advice
  • Quality Control/Quality Assurance Programs

Our staff has extensive experience in sustainable construction, performance of hardened concrete and the production of ready mix concrete.

Kevin MacDonald

Kevin MacDonaldKevin MacDonald is a Materials Engineer and consultant with specific expertise in production and performance of concrete. He is a Licensed Professional Engineer in Minnesota and Ontario, Canada, and is a Fellow of the American Concrete Institute.

Dr. MacDonald is Co Chair of Committee 130 B "Sustainability" and Vice-Chair of ACI 306 "Cold Weather Concreting", and a member of Committee 620, "Laboratory Technician Certification", ACI 302 "Construction of Concrete Slabs on Ground", and the Technical Activities Committee. He has published a number of papers dealing with the durability of concrete and practical aspects of the production of High Performance Concrete using large quantities of recycled materials. He is a recipient of the ASCE Charles Pankow Award for Innovation for work on high performance concretes with 98 percent reclaimed materials. He is the president of the Minnesota Chapter and a past member of the Southern Ontario Chapter.

His education includes a baccalaureate degree in Chemical Engineering, cum laude. He was awarded the University of Windsor Board of Governors Medal for highest standing in class, as well as the Chemical Institute of Canada's Medal for academic achievement.

He holds a Master's Degree and Doctor of Philosophy degree in Engineering Materials from the University of Windsor in Ontario, Canada. His dissertation and thesis dealt with chloride ion induced corrosion of steel in concrete and designing concrete to prevent this phenomenon from occurring.

Kevin MacDonald is a member of ASTM Committee, ASCE and Professional Engineers Ontario.

Mary Vancura

Mary VancuraMary Vancura is a civil engineer and consultant with expertise in pervious concrete and statistical analysis of concrete properties and sample spacing.

Vancura’s education includes a baccalaureate degree in civil engineering from Gonzaga University in Spokane, WA and a Masters and Ph.D. in civil engineering from the University of Minnesota in Minneapolis, MN.  Vancura also has a Masters in Business Administration from Augsburg College.







Rachel Detwiler

Rachel Detwiler is a civil engineer specializing in concrete materials. Her professional experience includes consulting, forensic engineering, testing, teaching, research and development, and editing related to concrete construction. She is a Licensed Professional Engineer in Minnesota and Illinois and is a Fellow of the American Concrete Institute.

Dr. Detwiler is a member of ACI Committee 201, “Durability of Concrete,” and serves on its oversight subcommittee. She is also a member of ACI Committee 234, “Silica Fume in Concrete.” She has published numerous papers on concrete durability, the effects of curing temperature on concrete properties, concrete test methods, and forensic investigations. She received ACI’s Construction Award for her paper, “Acceptance Testing Using 4 x 8 in. Cylinders,” in 2008.

Her education includes a baccalaureate degree in Civil Engineering, with honors. She holds a Master of Science Degree in Structural Engineering and Doctor of Philosophy degree in Engineering Materials from the University of California at Berkeley. Her dissertation dealt with the chemical and physical effects of silica fume in concrete.