Allowable construction loading on geosynthetics

February 1, 2014

From the GMA Techline RE: Allowable construction loading on geosynthetics Hello Dr. Koerner, On the question of allowable construction loading on geosynthetics, Daniel and Koerner (2007) state: “If not specifically excluded in the regulations, and if agreed on by the CQA engineer, all-terrain vehicles (ATVs) or equipment with smooth, oversized tires of maximum ground contact …

New installation guidelines from FGI/IAGI

December 5, 2013

For factory-fabricated lightweight geomembranes The Fabricated Geomembrane Institute (FGI) and the International Association of Geosynthetic Installers (IAGI) have collaborated to produce Guidelines for Installation of: Factory Fabricated Lightweight <0.64mm (25 mil) Thickness. The guidelines are arranged in four parts: 1. General: Guideline scope, references, submittals 2. Products: Geomembrane materials, quality control, geomembrane arrival at project …

New product: High-temperature geomembranes from GSE

November 18, 2013

Retains its mechanical and physical properties Prolonged exposure to temperatures above 60 C (140 F) can have a negative effect on standard polyethylene geomembranes. When the temperature exceeds 60 C, the liner’s mechanical properties more rapidly break down, causing acceleration in stress cracking and oxidation. This can lead to potential failure. In a new product …

Firestone announces expanded distribution model

November 5, 2013

Pond Pro to represent pond lining and geomembrane products Indianapolis-based Firestone Building Products Co. LLC announced in a Nov. 5 press release that it has engaged the Pond Pro sales group to sell its pond lining and geomembrane products. “Firestone Building Products is returning to an independent rep-based distribution model, and we are pleased that …

Coated, fabricated geomembrane modernizes Tempe’s water infrastructure

October 1, 2013

By John Heap Introduction The primary water treatment system in the city of Tempe, Ariz., serves about 160,000 residents and includes two main facilities: the South Tempe Water Treatment Plant (opened in the 1980s) and the Johnny G. Martinez Water Treatment Plant (built in 1967). The Martinez plant is a 50-million gallon per day (MGD) …

HDPE liner failures

From the GMA Techline RE: HDPE liner failures I am looking for information related to predictions or assessments of liner failures. The lead regulatory agency for an Environmental Impact Statement (EIS) is requesting data on HDPE liner failure assessments associated with geosynthetic covers. Our application is to use HDPE to cover an overburden stockpile with …

Silt fence?

From the GMA Techline RE: Silt fence? What are the test methods and specifications for silt fence? (Barry | Georgia) Reply: AASHTO M288 is what most people use for the silt fence specification. In it is a series of test method requirements and these are ASTM Standards. If you want we can send the tables …

Mullen Burst Test?

From the GMA Techline RE: Mullen Burst Test? I have a project that requires the Mullen Burst Test (ASTM D3786) be performed on a geotextile that is described as a needle-punched, nonwoven geosynthetic fabric suitable for reinforcement applications. I have been told by a supplier that the Mullen Burst Test is no longer recognized by …

Technical reference for LLDPE cover soil depth

From the GMA Techline RE: Technical reference for LLDPE cover soil depth We are working on a project and our installation procedures are being questioned—specifically, what basis do we have for claiming that 36in. of cover soil will protect a 40 mil liner from damage. Our firm has always used 12, 24, or 36 inches …

Solmax hires new technical manager

August 28, 2013

Mathieu Cornellier joins Canadian geomembrane firm. Canadian geomembrane manufacturer, Solmax Intl. Inc., announced in an Aug. 20 press release that Mathieu Cornellier has joined the company as technical manager, covering the Americas, Africa, and Europe. Cornellier is a certified civil engineer with a bachelor’s degree in civil engineering from Polytechnique de Montreal. For the last …