Are we talking about boiled linseed oil or raw? Bright Blessings, Kim Keith Addison wrote:
> Hi Hakan > > There isn't any humus in linseed oil. Triglycerides and some other > stuff, but no humus. Once it's dried (or cured - is there a > difference Greg?) it's pretty inert. > > >Hi Keith, > > > >Well in that case I mean humus as in soil and this is > >why you have to wash sand and gravel if it contains > >humus, before you use it in concrete. That is why I wanted > >to see the experiments referred to in the link, > >http://www.flaxcouncil.ca/flaxind7.htm > >not because I say that it cannot be used, but I want to be > >sure. Humus breaks down the concrete and I hate to see > >that happen around reinforcement bars, that are dependent on > >a good fixation to the concrete. > > You could write to the Flax Council and ask: > [EMAIL PROTECTED] > > It says: "A testing program completed at the University of Hong Kong > in 1996, proved conclusively that linseed oil-based preservatives > extend and enhance the life of concrete. Linseed oil-based > preservatives have significant potential in areas such as Hong Kong > and other parts of southeast Asia. These regions have high > concentrations of real estate which is principally concrete." > > There's more information here: > http://www.agr.gc.ca/cb/news/1996/n60626ae.html > Successful concrete preservative test opens major Asian market > > "The testing program was conducted at the University of Hong Kong by > Professor Y.K. Cheung, Pro-Vice Chancellor and Head of Engineering, > and one of southeast Asia's most senior engineers. The program leader > was Dr. H.C. Chan, head of the Civil Engineering Laboratory, at the > University of Hong Kong. The University of Manitoba supported the > project through the work of Dr. Sami Rizkalla, president of > Intelligent Sensing for Innovative Structures (ISIS) Canada and > professor of civil engineering. The testing equipment was designed > and constructed by the University's engineering team under Dr. > Rizkalla's leadership." > > That will have been high-quality work. > > This is the Hong Kong research report: "Xie, Y., Kwan, A.K.H., Chan, > H.C. and Rizkalla, S.H. Linseed oil-based concrete surface treatment > for building and highway structures in Hong Kong. Transactions, Hong > Kong Institution of Engineers, Hong Kong, Hong Kong Institution of > Engineers, 1999, 6 (1): 36 - 41." > > >One other sample is that old habit by construction workers to > >use concrete floors, before they finished the curing process, > >or mixing buckets, as urinary. Very dangerous and things that > >was stopped in Sweden 30 years ago, but I have still seen in > >Spain. To complete the curing process, (we call it burning, > >directly translated from Swedish), takes much longer than > >most people think.I have also seen damages from this, that > >destroyed costly insulation or load carrying constructions. > > > >I want to be very clear about that I do not know, if there are > >any adverse effects from linseed oil. If not, I want to know > >that this is investigated. When it comes to carrying concrete > >constructions, I prefer to know than assume. I am a little bit > >scary about this things, since I have seen some bad samples > >of mistakes and/or unqualified use of materials. > > HKU's Civil Engineering dept is pretty good. I think Hong Kong has > seen perhaps all possible permutations of bad building practices by > now, with some fairly horrific consequences. As a result, for quite a > long time already, they've had a high level of expertise in > investigations, setting standards and controls, in the universities > and in government too. I don't think they'll be making any rash > mistakes with anything that could affect concrete load factors. > > I can't help wondering why they didn't try tung oil instead, which is > more local at least. No Canadian subsidies maybe. > > Best > > Keith > > > >One sample was mentioned, when somebody said that the > >grey plastic pipes was generally used in heated floors during > >a period. I do not know in which country, but it did not surprise > >me, must have been a less developed country without the > >sufficient knowledge about materials. > > > >As a surface treatment of cured concrete, it should be no > >problems at all, but I still would be interested in the specifics > >of any investigation and the benefits. > > > >Hakan > > > > > >At 06:43 AM 12/17/2002 +0900, you wrote: > > >Hi Hakan > > > > > >I'm confused by your saying "humus material". Do you mean organic > > >material, or biological material? Humus is what you get in soil, or > > >should if it's still alive, complicated stuff. Sorry, after what > > >we've just been saying about English! :-) > > > > > >Linseed oil or flaxseed oil is a drying oil, why it's used in paints > > >and varnishes (I'm sure you know this), and also why it's not a very > > >good idea in your motor. It polymerizes, and becomes relatively inert > > >and impervious. Don't you think treatment of reinforcement bars with > > >linseed oil would be okay as long as the linseed oil was allowed to > > >dry (set) first before pouring the concrete? It's a lot like a > > >plastic coating. Well, it is a plastic coating. > > > > > >Best > > > > > >Keith > > > > > > > > > >I am saying that humus material is bad for concrete before it is > cured, > > > >please look at my message. Concrete does not cure properly with humus > > > >material, which is one of the first things you learn about concrete. I > > > >asked for documentation of investigations that it could be used in/on > > > >concrete before it has cured. I see no reason why it should be bad > after, > > > >but to suggest treatment of reinforcement bars after the > >concrete cured is > > > >a little bit difficult. To mix cement with biological material is > normally > > > >a no-no and I have seen many such mistakes in control inspections. > > > > > > > >I thought my message below was clear on the point of before or after. > > > > > > > >Hakan > > > > > > > >At 12:13 PM 12/16/2002 -0700, you wrote: > > > > >Could you please elaborate? You keep saying humus or humus partials > > > is bad > > > > >for concrete, but, that is all you say. Why would boiled linseed oil > > > be bad > > > > >for concrete after it has cured? > > > > > > > > > >Greg H. > > > > > > > > > >----- Original Message ----- > > > > >From: "Hakan Falk" <[EMAIL PROTECTED]> > > > > >To: <biofuel@yahoogroups.com> > > > > >Sent: Monday, December 16, 2002 10:04 > > > > >Subject: Re: [biofuel] Steel roofing plus other building links -(Was > > > > >embodiedenergy) > > > > > > > > > > > > > > > > > > > > > > If you put linseed oil on a cured floor it is one thing. > >But it you put > > > > > > humus particles in concrete before it is cured, I know that > >it can be a > > > > > > disaster. > > > > > > > > > > > > Hakan > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > > Biofuels list archives: > http://archive.nnytech.net/ > > Please do NOT send Unsubscribe messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service > <http://docs.yahoo.com/info/terms/>. Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
