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Our Contractor at site has damaged existing steel reinforcement while hacking our RC slab in preparation to cast an extension. Was wondering if there are any guidelines out there (or rule-of-thumb) on how much the steel bar can be damaged mechanically by hackers and still be considered...

Thanks to all of the responses that have been given to my query. I was orignally looking for this information last year to help with checking our Contractor's claim for desludging work. But the responses given more recently are still great for reference. Thanks again. Sincerely, Lester.

I'm doing some calculations for a Sewerage Treatment Plant, and don't seem to be able to find any data on this. Does anybody know where I can get the Bulk Density of Dewatered Sewage Sludge, with about 20%-30% Solids Content? Any Assistance is greatly appreciated. Lester Seow Assistant Site...