Return-path: <[log in to unmask]> From: [log in to unmask] Full-name: Tmbrframe Message-ID: <[log in to unmask]> Date: Tue, 11 Jul 2006 09:32:15 EDT Subject: Re: [BP] Concrete Epoxy Repair To: [log in to unmask] MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1152624735" X-Mailer: 9.0 Security Edition for Windows sub 5317 -------------------------------1152624735 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit To All CONCRETE Repair Experts, In an attempt to address interspersed thoughts and questions. The slab in question is about 8 months old. The control joints have not been cut at all yet. Neither the slab nor the non-existent joints have been sealed. There is still not any perimeter drainage in place. The slab is 6" thick with approx 4" below grade. There is heavy gauge 6" reinforcing mat set on cinder block bricks with radiant heating pipes tied to it. The pipes are pex-al-pex meaning plastic extruded over aluminum inside and out. The concrete is poured over Barrier brand insulation which is high density eps foam with poly on either side and is, in theory, a vapor barrier. There is no indication of water infiltration in the concrete. No wet spots at crack or anywhere else. I intend to cut control joints between the piers on which the building trusses sit. They are located on 12' centers in a 48' structure. Also intend to cut control joints longitudinally to divide slab into 3 section across the 30' width. These joints all connect piers for structural posts which are isolated from the slab by the same insulation, but cause the slab to have nasty inside corners cast into it. The single crack goes from one post at the mid point of the building length to the corresponding post pier on the other side. It winds several feet off course in the middle of the floor. The crack is about 1.5 mm on the one end and narrows to a closed but visible crack in about 6 feet. It showed up all at once the day after turning some heavy timbers which were on stickers on the floor. I could feel the vibration from the timbers slamming about 100' away in the separate office building. There is a set of pipes and conduit coming in under the slab right next to the post at the wide end of the crack which may have provided a route for water under the slab. The shop is used fro timber work ad the principal contaminate is sawdust I think the crack is pretty clean so far, but I would like to do what I can to stabilize it ASAP. My concern is fro the well being of the pipes , as they cannot take heaving and cycling if they are not sleeved. The crack in the slab itself is of little or no concern as my work will not abuse the concrete in general as long as I get the drainage issue addressed. Even a full load of timbers would only be 20 to 30 tons spread over most of the floor. Again, I feel that I can probably drill holes as deep as 1'" to 1 1/2" relatively safely if that is necessary. I hope that addresses all of the major variables. Thanks, David J. Dauerty To The Line Timber Frames -- To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: <http://listserv.icors.org/archives/bullamanka-pinheads.html> -------------------------------1152624735 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; charset=3DUS-ASCII"> <META content=3D"MSHTML 6.00.2900.2912" name=3DGENERATOR></HEAD> <BODY id=3Drole_body style=3D"FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY:=20= Arial"=20 bottomMargin=3D7 leftMargin=3D7 topMargin=3D7 rightMargin=3D7><FONT id=3Drol= e_document=20 face=3DArial color=3D#000000 size=3D2> <DIV>To All CONCRETE Repair Experts,</DIV> <DIV> </DIV> <DIV>In an attempt to address interspersed thoughts and questions. The= =20 slab in question is about 8 months old. The control joints have not be= en=20 cut at all yet. Neither the slab nor the non-existent joints have been= =20 sealed. There is still not any perimeter drainage in place. The=20= slab=20 is 6" thick with approx 4" below grade. There is heavy gauge 6"=20 reinforcing mat set on cinder block bricks with radiant heating pipes tied t= o=20 it. The pipes are pex-al-pex meaning plastic extruded over aluminum in= side=20 and out. The concrete is poured over Barrier brand insulatio= n=20 which is high density eps foam with poly on either side and is, in theory, a= =20 vapor barrier. There is no indication of water infiltration in the=20 concrete. No wet spots at crack or anywhere else. I intend to cu= t=20 control joints between the piers on which the building trusses sit. Th= ey=20 are located on 12' centers in a 48' structure. Also intend to cut cont= rol=20 joints longitudinally to divide slab into 3 section across the 30'=20 width. These joints all connect piers for structural posts which are=20 isolated from the slab by the same insulation, but cause the slab to have na= sty=20 inside corners cast into it. The single crack goes from one post at=20 the mid point of the building length to the corresponding post pie= r on=20 the other side. It winds several feet off course in the middle of= the=20 floor. The crack is about 1.5 mm on the one end and narrows to a=20 closed but visible crack in about 6 feet. It showed up all at once the= day=20 after turning some heavy timbers which were on stickers on the floor. =20= I=20 could feel the vibration from the timbers slamming about 100' away in=20 the separate office building. There is a set of pipes and conduit= =20 coming in under the slab right next to the post at the wide end of the crack= =20 which may have provided a route for water under the slab. The shop is=20= used=20 fro timber work ad the principal contaminate is sawdust I think t= he=20 crack is pretty clean so far, but I would like to do what I can to= =20 stabilize it ASAP. My concern is fro the well being of the pipes , as=20= they=20 cannot take heaving and cycling if they are not sleeved. The crack in=20= the=20 slab itself is of little or no concern as my work will not abuse the concret= e in=20 general as long as I get the drainage issue addressed. Even a full loa= d of=20 timbers would only be 20 to 30 tons spread over most of the floor. Aga= in,=20 I feel that I can probably drill holes as deep as 1'" to 1 1/2" relatively=20 safely if that is necessary. I hope that addresses all of the major=20 variables. </DIV> <DIV> </DIV> <DIV>Thanks,</DIV> <DIV> </DIV> <DIV>David J. Dauerty</DIV> <DIV>To The Line Timber=20 Frames </DIV></FONT></BODY></HTML> -- To terminate puerile preservation prattling among pals and the uncoffee-ed, or to change your settings, go to: http://listserv.icors.org/archives/bullamanka-pinheads.html -------------------------------1152624735--