GME currently offers geotechnical engineering and construction materials testing seminars led by Mark Kawalek, P.E., and Douglas Ziolkowski, P.E.

Of particular note as we enter the summer months is our construction materials testing seminar on Hot Weather Concreting, which has been developed for architects, engineers and contractors. The information presented can help minimize the adverse effects of hot weather on concrete applications. Principles offered in this presentation save time and money, improve the appearance of the finished product, and reduce the long-term maintenance of the pavement system. We have provided the following guidelines to support communication and encourage collaboration between all project stakeholders.

Physical evidence of improper hot weather placement:

  • Surface dusting
  • Waviness in surface
  • Excessive or uncontrolled cracking

Adverse effects of hot weather on hardened concrete:

  • Higher early strength gain/lower ultimate strength
  • Decreased durability and water tightness
  • Non-uniform surface appearance (surface dusting, waviness in surface, cracking)
  • Increased drying, shrinkage and/or cracking
  • Increased opportunity for cold joints

Preventive measures could include but are not limited to:

  • Pre-placement planning
  • Thoroughly moisten the subgrade
  • Sequence placement to minimize or control shrinkage stresses
  • Saw as soon as surface will allow
  • Apply curing membrane immediately upon finishing and in recommended quantity

Best Practice:  Plan and communicate early. Conduct a pre-construction meeting with the project team to address the potential concerns and discuss proven methodology for problem prevention.

Presentations on Geotechnical Engineering are presented by Doug Ziolkowski, P.E., and additional construction materials testing presentations are available from Mark Kawalek, P.E. Please call either Mark or Doug at 214.351.5633 if you would like to schedule a presentation.