Abstract: A portable system for on-site batch mixing of cementitious materials, such as mortar and grout, includes a batch mixing machine for metering and mixing cement, sand and water, a cement storage silo sized to hold at least one commercial delivery truckload of cement, and a pair of sand supporting ground pads. The large cement storage silo significantly reduces the manpower and equipment costs associated with the overall batch mixing process, and the sand support pads operate to prevent dirt contamination of the cementitious mixture. A specially designed pressurized shaft bearing/seal structure provided on the batch mixer portion of the mixing machine reduces grease seal and bearing maintenance by essentially precluding entry of cementitious material into the seal and bearing. The pressurized system utilizes either a spring or air under pressure to establish a higher pressure in the grease supply than that in the mortar.

Abstract: A portable system for on-site batch mixing of cementitious materials, such as mortar and grout, includes a batch mixing machine for metering and mixing cement, sand and water, a cement storage silo sized to hold at least one commercial delivery truckload of cement, and a pair of sand supporting ground pads. The large cement storage silo significantly reduces the manpower and equipment costs associated with the overall batch mixing process, and the sand support pads operate to prevent dirt contamination of the cementitious mixture. The water storage portion is provided with a simplified, floatless fill level control system and an improved water heating system which significantly reduces water temperature stratification. A specially designed pressurized shaft bearing/seal structure provided on the batch mixer portion of the mixing machine reduces grease and seal maintenance and functions to essentially preclude entry of cementitious material into the shaft bearing.