Cement Grout vs. Chemical Grout: Which One to Use, When, and Why

Used on a myriad of new and rehabilitation construction projects, cementitious and chemical grouts share a common category and name, but the distinct differences far outweigh the common qualities.

Cement Grout vs. Chemical Grout: Which One to Use, When, and Why

By Britt N. Babcock, P.E.   Used on a myriad of new and rehabilitation construction projects, cementitious and chemical grouts share a common category and name, but the distinct differences far outweigh the common qualities. Both grout types are used in civil applications ranging from sewer pipe...

Microtunneling or Guided Boring?

How to choose the most appropriate method for your project The debate regarding what method of mining to select for infrastructure pipe installation continues to grow. Debate of construction means and methods is healthy for the industry.  However, an accurate and realistic discussion of means and methods...

Cellular Concrete: A Cushion Over A Fault Line

As engineers continue to understand cellular concrete and its variety of material properties, this material continues to be used more prevalently and in interesting ways. Chiefly, cellular concrete is used for weight reduction, its cost-effectiveness, or because of its fluid nature. But this story is about...

170 Feet Below Columbus

By Lucian P. Spiteri, P.E., Paul C. Schmall, Ph.D., P.E., Mark Gentile, P.E., and Michael A. Nuhfer, P.E. The OSIS Augmentation and Relief Sewer (OARS) project is a 23,300-ft long, 20-ft finished diameter combined storm and sanitary overflow relief sewer mined through dolomite and limestone rock...

Innovations in Precast Concrete Segmental Linings: Case Studies from Around the World

Since their introduction, precast concrete segmental linings have continued to develop and evolve.  In this article, Jon Hurt, Tunnels Practice Leader at Arup, provides an overview of four projects, highlighting ongoing innovations to meet project challenges.  The continued trend toward steel fiber...

« Older Entries Next Entries »