The proposed ASTM WK50586, Practice for Measuring the Electrical Resistance of Fresh Concrete standard will show how to sample a load, prepare a mix specimen for evaluation and conduct measurements--the latter yielding information on water-cement ratio, initial setting time
, compressive strength, and overall concrete quality.
The initial setting time
of common Portland cement pastes is about > 45-75 min.
The initial setting time was determined from a series of penetration measurements at ten minute intervals, on a paste of standard consistence BS EN 196-3 (British Standards Institute 1995b).
For the binary MK-PC blends the initial setting time shows a substantial increase at 5% MK and then decreases slightly at 10 and 15% MK before increasing further at 20% MK.
53 (e) Initial setting time (mins) 130 (f) -- -- Final setting time (mins) 165 (f) -- -- Standard consistency (%) 27 (f) -- -- True material density (g/[cm.
Speed Seal's acetoxy silicone formula has an initial setting time
of less than 15 minutes (you need to work quickly when applying it), which is perfect if your home has only one bathroom.