www.concreteinternational.com | Ci | NOVEMBER 2019 29
Xiaoqiang (Hugh) Hou is an Associate
III at Wiss, Janney, Elstner Associates,
Inc. (WJE), Northbrook, IL. He is a
member of the Illinois Chapter – ACI,
ASTM International, the International
Cement Microscopy Association, and the
Society of Concrete Petrographers. He
received his BS in geology from Taiyuan
University of Technology (formerly
Shanxi Mining College), Shanxi Province, China; his MS in coal
geology from China University of Mining and Technology, Beijing,
China; and his PhD in geology from the University of Illinois at
Urbana-Champaign, Urbana, IL.
Richard A. Cechner is a Senior
Associate at WJE. He has been involved
with investigations of polymeric
materials, concrete, mortar, coatings,
sealant, and adhesive failures, and
analysis of a wide variety of construction
materials. He is a member of the Illinois
Chapter – ACI and the Association for
Preservation Technology International.
He received his BS in chemistry from
Roosevelt University, Chicago, IL.
ACI member Terrence M. McGovern is
a Senior Associate at WJE, Lakewood,
CO. He is a member of ACI Committees
546, Repair of Concrete, and 563,
Specifications for Repair of Structural
Concrete in Buildings. He is also a
member of the Structural Engineers
Association of Colorado. He received
his BS and MS in civil engineering
from the University of Michigan, Ann Arbor, MI. He is a licensed
professional engineer in Colorado.
ACI member Kevin A. Michols is
a Principal and Director of Janney
Technical Center at WJE. He is a
member of ACI Committees 546, Repair
of Concrete, and 563, Specifications
for Repair of Structural Concrete in
Buildings. He is also a member of the
American Society of Civil Engineers,
International Concrete Repair Institute,
and Structural Engineers Association of Illinois. He received his
BS in civil engineering and his MS in structural engineering from
the University of Illinois at Urbana-Champaign. He is a licensed
professional engineer in multiple states and a licensed structural
engineer in Illinois and Nebraska.
ACI member Todd Nelson is an
Associate Principal at WJE. He is a
member of ACI Committees 302,
Construction of Concrete Floors, and
360, Design of Slabs on Ground. He is
also a member of the American Concrete
Pavement Association, the American
Concrete Pipe Association, and ASTM
International. He received his BS in
civil engineering from the University
of Minnesota, Minneapolis, MN. He is a licensed professional
engineer in Illinois.
3. Hou, X.; Kirkpatrick, R.J.; Struble, L.J.; and Monteiro, P.J.M.,
“Structural Investigations of Alkali Silicate Gels,” Journal of the
American Ceramic Society, V. 88, No. 4, Apr. 2005, pp. 943-949.
4. ASTM C33/C33M-18, “Standard Specification for Concrete
Aggregates,” ASTM International, West Conshohocken, PA, 2018, 8 pp.
5. Cong, D.X.; Lawrence, B.L.; Deno, D.W.; and Patty, T.S.,
“ASR-Induced Surface Defects,” Proceedings of the 12th International
Conference on Alkali-Aggregate Reaction in Concrete, Oct. 15-19, 2004,
Beijing, China, V. 2, pp. 1142-1147.
6. Craig, P.; Pinelle, D.; Scalli, M.; and Sherman, M., “NSAR in
Concrete Slabs,” Concrete Surfaces, Spring 2008, pp. 15-17. www.
7. Beyene, M.; Lee, R.J.; and Silsbee, M., “Cause of Debonding and
Blistering of Epoxy Floor Coatings,” Concrete Construction, Sept. 2012.
8. ASTM C856-18a, “Standard Practice for Petrographic Examination
of Hardened Concrete,” ASTM International, West Conshohocken, PA,
2018, 15 pp.
9. ASTM C457/C457M-16, “Standard Test Method for
Microscopical Determination of Parameters of the Air-Void System in
Hardened Concrete,” ASTM International, West Conshohocken, PA,
2016, 18 pp.
10. ASTM C295/C295M-18a, “Standard Guide for Petrographic
Examination of Aggregates for Concrete,” ASTM International, West
Conshohocken, PA, 2018, 9 pp.
Selected for reader interest by the editors.