It is a relatively old article (1996); however, I particularly like the approach. The idea of surveying prevailing practice in "real" metric countries is a good one. The general table layout is a good guide to deciding a metric practice: *Look at the current Customary practice *Do an initial soft conversion *Survey practices in metric countries. *Decide on a hard conversion If I look at the specific recommendations, I would only quibble with one area, the admixture dosages. Since these are the resolutions of the dose, not the dose itself, I would avoid 25 mL/100 kg (second and third lines), as it adds an apparent digit of resolution. Just require multiples of 20 mL/100 kg, or 50 mL/100 kg for the last one. Secondly, I would avoid the pesky 100 kg, which always seems to cause problems and give dose steps per metric ton, thus resolutions of 0.1 L/t, 0.2 L/t, and 0.5 L/t (they could be in milliliters if anyone has a strong preference. Engineers who actually specify concrete are purchasing many tons at a time. The rest of us buy what the guy says he mixes.
--- On Fri, 3/4/11, Pat Naughtin <[email protected]> wrote: From: Pat Naughtin <[email protected]> Subject: [USMA:49970] Concrete metrication To: "U.S. Metric Association" <[email protected]> Cc: "UKMA Metric Association" <[email protected]> Date: Friday, March 4, 2011, 12:05 AM Dear All, This might be useful to the engineers amongst us. http://www.concreteconstruction.net/Images/Practical%20Metrication%20in%20the%20Concrete%20Industry_tcm45-343159.pdf Cheers, Pat Naughtin LCAMS Author of the ebook, Metrication Leaders Guide, see http://metricationmatters.com/MetricationLeadersGuideInfo.html Hear Pat speak at: http://www.youtube.com/watch?v=_lshRAPvPZY PO Box 305 Belmont 3216, Geelong, Australia Phone: 61 3 5241 2008 Metric system consultant, writer, and speaker, Pat Naughtin, has helped thousands of people and hundreds of companies upgrade to the modern metric system smoothly, quickly, and so economically that they now save thousands each year when buying, processing, or selling for their businesses. Pat provides services and resources for many different trades, crafts, and professions for commercial, industrial and government metrication leaders in Asia, Europe, and in the USA. Pat's clients include the Australian Government, Google, NASA, NIST, and the metric associations of Canada, the UK, and the USA. See http://www.metricationmatters.com for more metrication information, contact Pat at [email protected] or to get the free 'Metrication matters' newsletter go to: http://www.metricationmatters.com/newsletter to subscribe.
