Micro-Aid PFR Eliminates Bentonite and Reduces Cost Moretrench already had bentonite on site for in- stallation of the grout pipes. Based on the re- quirements, they planned to include bentonite to boost stability and reduce bleed. However, Specrete’s lab tests demonstrated that Micro-Aid PFR improved the fluidity and stability of the grout without the use of bentonite or other admixtures. Overall, the mix was less expensive and saved the hassle of adding bentonite. Micro-Aid PFR was added to a 1.3 water-to-ce- ment ratio and the resulting grout had a marsh funnel flow of 33.5 seconds and less than 1% bleed. The average 28 day strength was just over 700 psi. Specrete can assist in developing a custom mix for any grouting application. Contact us with your grouting questions: [email protected] • (800) 245-3407 In November of 2017, Moretrench completed a permeation/compensation grouting project for the Doan Valley Storage Tunnel (DVT) on Cleveland’s east side. The DVT is part of Project Clean Lake, a $3 bil- lion, 25-year program initiated by the Northeast Ohio Regional Sewer District (NEORSD). The permeation/ compensation grout was used to protect an existing 108” by 132” oval shaped brick culvert that conveys Giddings Brook while a new tunnel passed below it. Moretrench installed a network of battered and verti- cal injection tubes so fluid grout could be pumped un- der pressure into the weathered rock and the soil just above. The grout had to penetrate small openings, so a marsh funnel flow in the 30’s was requested. Resis- tance to bleed was specified to ensure minimal voids would be left. The owner called for an unconfined compressive strength of 500 psi. Spring 2018

Micro-Aid PFR Eliminates Bentonite and Reduces Costa marsh funnel flow in the 30’s was requested. Resis-tance to bleed was specified to ensure minimal voids would be left. The owner

Download PDF Report

Upload
others
View
0
Download
0

Embed Size (px)

Citation preview

Micro-Aid PFR Eliminates Bentonite and Reduces Cost

Moretrench already had bentonite on site for in-stallation of the grout pipes. Based on the re-quirements, they planned to include bentonite to boost stability and reduce bleed. However, Specrete’s lab tests demonstrated that Micro-Aid PFR improved the fluidity and stability of the grout without the use of bentonite or other admixtures. Overall, the mix was less expensive and saved the hassle of adding bentonite.

Micro-Aid PFR was added to a 1.3 water-to-ce-ment ratio and the resulting grout had a marsh fun-nel flow of 33.5 seconds and less than 1% bleed. The average 28 day strength was just over 700 psi. Specrete can assist in developing a custom mix for any grouting application. Contact us with your grouting questions:[email protected] • (800) 245-3407

In November of 2017, Moretrench completed a per-meation/compensation grouting project for the Doan Valley Storage Tunnel (DVT) on Cleveland’s east side. The DVT is part of Project Clean Lake, a $3 bil-lion, 25-year program initiated by the Northeast Ohio Regional Sewer District (NEORSD). The permeation/compensation grout was used to protect an existing 108” by 132” oval shaped brick culvert that conveys Giddings Brook while a new tunnel passed below it.

Moretrench installed a network of battered and verti-cal injection tubes so fluid grout could be pumped un-der pressure into the weathered rock and the soil just above. The grout had to penetrate small openings, so a marsh funnel flow in the 30’s was requested. Resis-tance to bleed was specified to ensure minimal voids would be left. The owner called for an unconfined compressive strength of 500 psi.

Spring 2018