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RE: Retaining wall of sawdust[Subject Prev][Subject Next][Thread Prev][Thread Next]
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- Subject: RE: Retaining wall of sawdust
- From: Joseph Goldbronn <JGoldbronn(--nospam--at)gbdhdesign.com>
- Date: Wed, 13 May 2015 21:59:58 +0000
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Thanks Lloyd for the info. When I went to the site there was sawdust still in the room and it was very dry. It had the feeling of being kilned dried which makes sense because they are taking this sawdust right into their hopper which then is pressed and turned into fire logs. From my internet searching it seems like it is in the 5%-10% range. Any idea how you would determine friction angle? I may end up just using an E.F.P. which is around what I see around here for the local soils and call it a conservative design. Thanks, Joe -----Original Message----- From: seaint-seaosc(--nospam--at)mail-list.com [mailto:seaint-seaosc(--nospam--at)mail-list.com] On Behalf Of Lloyd Pack, P.E. Sent: Wednesday, May 13, 2015 1:03 PM To: seaint-seaosc(--nospam--at)mail-list.com Subject: Re: [SEAINT-SEAOSC] Retaining wall of sawdust Hello Joe, You say that the sawdust is protected so that it doesn't get wet, but what is the moisture content of that sawdust in the pile? There are some species of wood that will hold more that their dry unit weight in water. The amount of water that a wood can hold is also dependent on where in the log the wood is located, or what type of wood it is. For instance, Western Red Cedar, a commonly used wood for fences, has an average green moisture content of 58% for the heartwood and 249% for the sapwood. The sapwood will hold quite a bit more water than the heartwood. Also the amount of heartwood or sapwood as a percentage of the volume of the log varies quite a bit by species. You need to find what the maximum moisture content is in the pile. Then you will need to know the friction angle of the material in that pile. I would expect the friction angle to go up with an increasing moisture content. That is to say that the sawdust will be more prone to caking or adhering to itself with more moisture in the pile. That will help with the lateral bearing pressure. It may be that as the moisture goes up the friction angle goes Truncated 969 characters in the previous message to save energy. ------------------------------------------------------------------------- Post your message to the list by sending it to: SEAINT-SEAOSC(--nospam--at)mail-list.com. The email messages sent to the list will be saved in an archive on the World Wide Web. These archives are located at: http://archive.mail-list.com/SEAINT-SEAOSC To contact the list owner, send your message to: SEAINT-SEAOSC-list-owner(--nospam--at)mail-list.com. Sponsored By: Pacific Structural & Forensic Engineers Group, Inc. (PSFEG) To unsubscribe, switch to/from digest, get on/off vacation, or change your email address, click here. <http://cgi.mail-list.com/u?ln=seaint-seaosc&nm=seaintma%40euken.net>
- RE: Retaining wall of sawdust
- From: Lloyd Pack, P.E.
- RE: Retaining wall of sawdust
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