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of course I was speaking from a suppliers point of view and my liabilities. dsuring the pre-test meeting the client, the consultant and even the architect agreed on a figure they'd be happy with from these results and they surpassed that figure. As far as I'm concerned the 9 day result was...

just to let you know how this worked out again we knew the concrete was ok, the 150mm cubes told us this at 7 days so from a suppliers point of view I was quite relaxed about that, it was the workmanship that was in question. The client just wanted reassurance as to the strength of the insitu...

anyone know of research or had experience of the following. C60 concrete, incl 20kgs m/silica supplied to a project. Cubes at 7 days 55-60kn so no problem there. Client is unhappy with workmanship and wants to know strength of insitu concrete. Cores drilled at 9 days, these will be crushed at...

as a concrete supplier I can honestly say that every cube failure I've ever been involved in has always been traced back to the site and poor testing and especially curing. The cubes are usually the responsibility of the lowest ranked man on site who hasn't been trained. They traditionally get...

it will produce excellent concrete but that is just a brand name, every admix company will produce their own self compacting admixture. Used one recently and the only complaint from the contractor was the strengths were too high when he had to break some out.60kn+ when he only asked for 40 !