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DFI announces Dan A. Brown as 2022-2023 traveling lecturer
June 2nd, 2022
Dan A. Brown, Ph.D., P.E., D.GE Dan A. Brown, Ph.D., P.E., D.GE, chief engineer and senior principal, Dan Brown and Associates, has been selected as the 2022-2023 Traveling Lecturer. He is available, on request of DFI, to present lectures September 1, 2022 – August 31, 2023. As one of America’s leading authorities on the construction […]
Study: Geotextiles market to grow at CAGR of 10.3% through 2031
June 1st, 2022
Photograph courtesy of Tensar Corp. Ongoing large-scale infrastructure projects are fueling global demand for geotextiles in the architecture, engineering and construction (AEC) industry. The growing utilization of geotextiles with improved functional characteristics and cost-effectiveness for erosion control applications are steering revenue expansion of the geotextiles market. Globally, the market valuation is projected to reach US $22.9 billion by […]
Landfill trenches with geocomposites
June 1st, 2022
Q: I am wondering if you know of or can point me in the right direction in regard to determining viability of leachate disposal via spraying back onto the active face of a landfill. I have a landfill that has a few issues, and while, from a practical sense, we have had some success with […]
My journey along the ‘Geosynthetics Superhighway’
June 1st, 2022
I've been on a fascinating ride over the last five years during which I have edited and written for Geosynthetics magazine. I began work as the editor of the magazine on March 1, 2017, and less than two weeks later, I traveled to my first geosynthetics-related conference, Geotechnical Frontiers 2017, March 12–15, 2017, in Orlando, […]
Adding graphene to geosynthetics
June 1st, 2022
Q: I have some commercial application questions in the field of geosynthetics. We manufacture graphene powders in the most sustainable way, and it allows us to supply graphene to manufacturers much more economically. As you may have heard, graphene has wonderful material properties atomically to offer, and I am looking for opportunities to leverage its […]
ASTM formed dimple board standard
June 1st, 2022
Q: Which American Society for Testing and Materials (ASTM) test would you recommend for tear evaluation of formed dimple board? I am aware of D1004, but can this test be performed on formed dimple board? A: ASTM has five tear methods commonly used in geosynthetics. They are listed below. ASTM D751 Trouser Tear (4 × […]
Stacking GCL rolls
June 1st, 2022
Q: I have a question regarding the storage and handling of geosynthetic clay liner (GCL) rolls. The manufacturer allows stacking up to five GCL rolls. Is this okay? A: The answer depends on the subgrade under the stacked GCL rolls and the equipment you are using to handle the rolls. In a manufacturing plant, with […]
Geotextile grab test methods
June 1st, 2022
Q: I know the American Society for Testing and Materials (ASTM) approves several grips (the requirement is they be “flat”) to perform ASTM D4632 and ASTM D5034. We use a hard, smooth rubber surface for the woven geotextile and a slightly serrated surface for the nonwoven geotextile. One of our customers is using a smooth […]
Pipe penetrations through geomembranes
June 1st, 2022
Q: Is there a recommended detail that you can provide or point me toward for pipe penetrations through geomembrane single and double liners? A: You should review American Society for Testing and Materials (ASTM) D6497 Standard Guide for Mechanical Attachment of Geomembranes to Penetrations or Structures. It is excellent, with three tried-and-true standard details that […]
Geotextile impact testing
June 1st, 2022
Q: We would like to carry out an impact test on geotextiles as described in Koerner (2012), Chapter 2.3.3 Mechanical Properties-Impact Test and Chapter 2.5.5 Impact (Tear) Resistance. I came across the Geosynthetic Research Institute (GRI) GS2 Test Method for Rupture Strength of Geosynthetics by Pendulum Impact testing standard. My questions regard the test apparatus […]