The maximum amount of sand that could be pumped in a sand-cement grout was determined, using sands with six different percentages of particles finer than the No. 100 sieve.nIt was found possible to pump two parts of sand to one of cement when the sand contained no sizes passing the No. 100 sieve, and three parts of sand to one of cement with 25 per cent of the sand passing the No. 100 sieve. The additions of uncalcined diatomite, fly ash, pumicite, and loess increased the quantity of sand that could be pumped.
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