| Author |
Message |
Robert E. Woodburn, AIA, CSI, CCS, CCCA
Senior Member
Username: bob_woodburn
Post Number: 126
Registered: 11-2010
| | Posted on Friday, January 23, 2015 - 04:38 pm: |    |
I'm looking for someone willing to share a spec section for polyjacking (pressurized polyurethane grouting for slab lifting). Is anyone able to help me? Thanks. |
Richard Gonser AIA CSI CCCA SCIP
Senior Member
Username: rich_gonser
Post Number: 88
Registered: 11-2008
| | Posted on Friday, January 23, 2015 - 05:48 pm: | |
Try these guys as a starting point.
http://www.haywardbaker.com/WhatWeDo/Techniques/Grouting/CompactionGrouting/Specifications/default.aspx
I just had a project needing compaction grouting and the geotechnical engineer liked their sample sections. |
Robert E. Woodburn, AIA, CSI, CCS, CCCA
Senior Member
Username: bob_woodburn
Post Number: 127
Registered: 11-2010
| | Posted on Friday, January 23, 2015 - 06:14 pm: | |
Thanks, but these appear to use Portland cement grout, and for different purposes. I'm looking for something to be injected, in conjunction with perimeter underpinning, to raise a slab on grade where the soil has shrunk, and the substrate grade, as a result, is now lower...a sunken slab. |
Richard Gonser AIA CSI CCCA SCIP
Senior Member
Username: rich_gonser
Post Number: 89
Registered: 11-2008
| | Posted on Friday, January 23, 2015 - 06:56 pm: | |
They have that specific topic as well. I did a little poking around after I sent the prior comment.
http://www.haywardbaker.com/WhatWeDo/Techniques/Grouting/PolyurethaneGrouting/default.aspx
This one is not a 3-part SectionFormat document. But, it does have the technical content that should get you what you need to write a proper section. |
Robert E. Woodburn, AIA, CSI, CCS, CCCA
Senior Member
Username: bob_woodburn
Post Number: 128
Registered: 11-2010
| | Posted on Monday, January 26, 2015 - 10:28 am: | |
Yes, that's it. I looked around somewhat on that site Friday, but apparently didn't poke around in the right place, or long enough. Thanks for finding it, Richard! |
Mark Gilligan SE,
Senior Member
Username: mark_gilligan
Post Number: 704
Registered: 10-2007
| | Posted on Monday, January 26, 2015 - 02:01 pm: | |
Slab jacking has been done using Portland cement grout. Why do you need to use polyurethane grout? |
Robert E. Woodburn, AIA, CSI, CCS, CCCA
Senior Member
Username: bob_woodburn
Post Number: 130
Registered: 11-2010
| | Posted on Monday, January 26, 2015 - 02:30 pm: | |
Seems as if the the literature cited above cited some advantages over concrete grout. Since I was asking on behalf of our structural engineer, I didn't read it in detail, but I think expansion in place (adjustable by formulation, etc.), light weight, and perhaps water resistance are factors. I believe the expansion produces the pressure, not (just) the force of injection. |
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