High Strength Grout 1

[msquared48]

Ran across a project I have to analyze that is a 140 foot lattice tower where the pipe column legs were high preessure grouted grouted in the past to increase their capacity. Problem is I do not know how high, what the grout strenth was, or its density. All this info figures into a seismic analysis of the tower required under the new ANSI/TIA-222-G code. Although seismic seldom governs for these, I am nervous making this assumption with the extra weight of the grout.

Have a call into the engineer who did the analysis 15 or so years ago, but if he cannot give me the information, is there a grout strength and density that would be the most common to use in this case? It appears that the density can vary from 20 to 120 pcf which is one huge swing. Hate to be too conservative here, but I may have to.

Mike McCann
MMC Engineering

http://mmcengineering.tripod.com

 

[JedClampett]

I don't think it's conservative to use the highest weight grout. I'm pretty sure that any grout lighter than 120 pcf would be a special order type product. For a use as mundane as filling a post, I would expect a very normal, sand cement grout.
Even standard non-shrink grout would be a little too pricey for this use.