http://materialsman.com/2009/01/measuring-soil-densities/ Construction materials and bird watching anecdotes Wed, 18 Apr 2012 08:01:56 +0000 hourly 1 http://wordpress.org/?v=3.3.1 http://materialsman.com/2009/01/measuring-soil-densities/comment-page-1/#comment-369 Ian Sat, 31 Oct 2009 17:26:53 +0000 http://materialsman.com/?p=78#comment-369 well Yorick, this is happening. Portable FWDs are being carried out, but as more or less fact finding at the moment. It will come to end product testing and not by density but by stiffness. It would pay unbound subbase manufactures to conduct some research so they are prepared for the future that they can sell subbase by it's performance. well Yorick, this is happening. Portable FWDs are being carried out, but as more or less fact finding at the moment. It will come to end product testing and not by density but by stiffness. It would pay unbound subbase manufactures to conduct some research so they are prepared for the future that they can sell subbase by it’s performance.

]]> http://materialsman.com/2009/01/measuring-soil-densities/comment-page-1/#comment-367 yorick Fri, 30 Oct 2009 13:21:17 +0000 http://materialsman.com/?p=78#comment-367 Ian, how's about the more operative control of bound materials? what I mean is the portable falling weight deflectometer. If the volume of the soil to be spread'n'pressed is big enough and the moisture and mixture composition relatively even - why not to try to percuss down the metal disk placed upon the surface? Ian, how’s about the more operative control of bound materials? what I mean is the portable falling weight deflectometer. If the volume of the soil to be spread’n'pressed is big enough and the moisture and mixture composition relatively even – why not to try to percuss down the metal disk placed upon the surface?

]]> http://materialsman.com/2009/01/measuring-soil-densities/comment-page-1/#comment-16 Ian Sat, 10 Jan 2009 18:18:42 +0000 http://materialsman.com/?p=78#comment-16 Just reviewing a new Transport Scotland tender, soil density measurement is still there for method compaction. Lets say for a moderate muck shift 200,000M3 say 400,000 Tonnes, this is convenient maths for the sampling rate is 1 per 400 Tonnes. A 1000 measurements say at half an hour per measurement at £25 an hour for a tech is £12500, minimum. Be interesting how the CDM regs view this dangerous mixing of techs and plant. The CDM supervisor (as I understand it) has to look at the safety of the design, this is part of the design, it's the specification. Now if we have to stop one earthworks team for safe sampling, this 500 hours for 200,000M3 will cost in excess of £200,000. (6 ADT, 1 dozer and roller, 1 backactor.) OK the dozer and roller will not stop, but its serious money for what control? Just fact finding? a spec typo? wake up TS you are endangering lives. Just reviewing a new Transport Scotland tender, soil density measurement is still there for method compaction. Lets say for a moderate muck shift 200,000M3 say 400,000 Tonnes, this is convenient maths for the sampling rate is 1 per 400 Tonnes. A 1000 measurements say at half an hour per measurement at £25 an hour for a tech is £12500, minimum. Be interesting how the CDM regs view this dangerous mixing of techs and plant. The CDM supervisor (as I understand it) has to look at the safety of the design, this is part of the design, it’s the specification. Now if we have to stop one earthworks team for safe sampling, this 500 hours for 200,000M3 will cost in excess of £200,000. (6 ADT, 1 dozer and roller, 1 backactor.) OK the dozer and roller will not stop, but its serious money for what control? Just fact finding? a spec typo? wake up TS you are endangering lives.

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