Hillsborough County Florida is using a mix of expanding polyurethane foam and conventional cement grout as a more cost effective means of filling sinkholes. Officials say the mix uses 30 to 40% less grout adding up to a 30% cost savings. The article in the Tampa Tribune did not indicate the contractor or product name that they are using but apparently several agencies in California and other states are using the same material. Story via ASCE SmartBrief.
Press Releases
U.S. Company, NCFI Polyurethanes, Launches TerraThane.com Website for Geo-Technical Applications and Uses
August 16, 2011 MOUNT AIRY, NC—NCFI, a U.S. company, is aiding the world geo-technical market by launching a Website for a line of new generation polyurethane products for geo-technical uses.
The Website, www.terrathane.com, provides companies working in the geotechnical field (i.e. concrete highway lifting, concrete slab raising, pipeline and tunneling, cavity filling, soil stabilization, pole setting, mine reclamation) a single online resource for choosing the very best product for their specific uses, educational material, and equipment and training resources. [Editor] Click through for the rest of the press release. [/Editor]
Press Releases
Minnesota Company Transforming Highway and Bridge Repair by Using NCFI Engineered Polyurethane Foam
August 11, 2011 MOUNT AIRY, NC—Gary Molstre, owner of Mudpumpers Mudjacking, Moorehead, MN, says there is no chance they are changing the company name, but they are definitely changing the material they use to repair highways and bridges to an engineered polyurethane foam system and they’ve coined a term for it: “foamjacking”.
Mudjacking, also called slab jacking, concrete lifting, concrete raising, and slab leveling, is the traditional method of fixing damaged concrete highways and bridge approach panels. The process was developed in the 1930s and involves pumping “mud” (everything from clay, sand, and loam, to Portland cement, fly ash, lime, casting plaster, and hot asphalt have been used) beneath concrete slabs that have become uneven, sunken, and/or pulled away from bridge approaches due to soil erosion and/or the soil being compacted or compressed from the sheer weight of the slab. Mudjacking involves drilling holes in the concrete and pumping “mud” and pressure beneath to lift the slab to its original place and keep it there. [Editor] Click th rough for the rest of the press release. [/Editor]
Available Resources
Ground penetrating radar being used to detect potential sinkholes around sewer pipes
When sewer pipes crack and leak, the surrounding ground becomes saturated and soil can migrate into the pipe and leave behind a void. Eventually this void can expand until it undermines the pavement or other […]