RJM1: The RJM1 comprises of a grout mixer that produces grout slurries of high density and accuracy. During mixing, a non-radioactive densitometer is used to measure grout density. A delivery pump with built-in grout averaging tank is supplied on separate skid. The mixer also incorporates a surge tank for handling the bulk cement/silo grout. The equipment is designed for assembly on the work vessel and is capable of pumping grout from a considerable distance.