Jan Vosahlik, Ph.D.

Jan Vosahlik, Ph.D.


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Jan specializes in the development, characterization, and evaluation of concrete mixtures, with focus on conventional, self-consolidating, high-performance, and other specialty concretes. He is an expert in rheology of cement-based materials, fresh concrete properties optimization and troubleshooting, and concrete pumpability. His technical work includes characterization of concrete air void system and assessment of freeze-thaw durability, implementation of new technologies in concrete mixture design, and use of novel test methods and characterization technique of construction materials. At CTLGroup, Jan’s main focus is on design, development and troubleshooting of concrete mixtures, solving construction-related issues, deployment of new products in the construction industry, and research & development.

Prior to joining CTLGroup, Jan was a research assistant at Kansas State University. While there, he conducted research projects focused on improving construction practices and durability of local infrastructure.


Ph.D. in Civil Engineering

Kansas State University, 2018


M.S. in Civil Engineering

Kansas State University, 2014


B.S. in Structural and Transportation Engineering

Czech Technical University in Prague, 2012


Riding K. A., Vosahlik J., Feys. D. Use of Nanoclay Particles in Concrete for Pumping Applications. Supplementary Papers, Superplasticizers and Other Chemical Admixtures in Concrete, Beijing, China, 2018.

Vosahlik J., Riding K. A., Feys D., Lindquist W., Keller L., and Van Zetten S. Concrete Pumping and its Effect on the Air Void System. Materials and Structures. 2018.

Riding K. A., Vosahlik J., Bartojay K., Lucero C., Sedaghat A., Zayed A., and Ferraro C. Methodology Comparison for Concrete Adiabatic Temperature Rise. ACI Materials Journal. 2018. [Accepted for Publication].

Vosahlik, J., Riding, K. A., Esmaeily, A., Billinger, R., and McLeod, H. New Approach to Air Void Clustering in Concrete. ACI Materials Journal. 2016.

Vosahlik, J., Feys, D., Riding, K. A. (2016). A Correction Procedure to Characterize the Bottom Effect of a Rotary Cylinder during Tribological Measurements of the Lubrication Layer of Highly Workable Concrete. Proceedings of Combined RILEM Symposium on Self-Compacting Concrete and Design and Use of Self-Consolidating Concrete (SCC 2016), Washington, DC.

  • American Ceramic Society
    • Cements Division
  • American Concrete Institute

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