A system comprises a cement mixer, a supply tank to supply dry cement to the cement mixer, and a dry cement height sensor to measure the height of the dry cement in the cement supply tank. A valve controls the flow of dry cement to the cement supply tank based on the signals from the dry cement height sensor. Additional apparatus, methods, and systems are disclosed.

An example apparatus for additive manufacturing can include a supply of dry cement powder (702) having an individually controllable outlet (704); a supply of a dry mineral filler (706) having an individually controllable outlet (708); a supply of a curing accelerator (712) having an individually controllable outlet (714); and a supply of water (716) having an individually controllable outlet (718). A batch mixer (722) can receive and mix a controlled amount dry cement powder from the supply of dry cement powder, a controlled amount of dry mineral filler from the supply of dry mineral filler, a controlled amount of curing accelerator from the supply of curing accelerator, and a controlled amount of water from the supply of water, thus forming a batch of cementitious material. A pump (750) can be connected to the batch mixer to pump the cementitious material. A delivery hose (150) can be connected to the pump to deliver the cementitious material pumped by the pump from the batch mixer. A printhead (502) can be connected to an outlet of the delivery hose. The printhead can be positionable in three-dimensional space.

An example apparatus for additive manufacturing can include a supply of dry cement powder (702) having an individually controllable outlet (704); a supply of a dry mineral filler (706) having an individually controllable outlet (708); a supply of a curing accelerator (712) having an individually controllable outlet (714); and a supply of water (716) having an individually controllable outlet (718). A batch mixer (722) can receive and mix a controlled amount dry cement powder from the supply of dry cement powder, a controlled amount of dry mineral filler from the supply of dry mineral filler, a controlled amount of curing accelerator from the supply of curing accelerator, and a controlled amount of water from the supply of water, thus forming a batch of cementitious material. A pump (750) can be connected to the batch mixer to pump the cementitious material. A delivery hose (150) can be connected to the pump to deliver the cementitious material pumped by the pump from the batch mixer. A printhead (502) can be connected to an outlet of the delivery hose. The printhead can be positionable in three-dimensional space.

A containerized concrete batch plant is disclosed, comprising a container configured to contain a concrete batch plant to permit the transportation of the concrete batch plant. The concrete batch plant comprising one or more aggregate storage silos to receive a plurality of concrete elements. The one or more aggregate storage silos pour the concrete elements onto a conveyor based on quantity determination by a computer via a deductive scale. The conveyor transfers the concrete elements to a two-shaft mixer. An auger-fed hopper has an auger that is directly exposed to the contents inside the two-shaft mixer and transfers the contents inside the two-shaft mixer into the auger-fed hopper. A concrete pump has access to the auger-fed hopper and pumps the concrete inside the auger-fed hopper into a concrete output hose with a concrete output opening. A knuckle crane and/or hydraulic arms holds supersacks above the aggregate storage silos and the two-shaft mixer.

A modular concrete production system includes individual units for the production of concrete that may be individually transported to a construction site and set up for on-site concrete production. The system includes a portable concrete mixing unit, a portable power supply unit, and a portable water supply unit. The system also includes modular bins for cement and aggregate. The bins are pre-loaded with cement and aggregate off-site and then transported to the work site for use. The bins can be stacked onto hoppers to supply cement and aggregate to a concrete mixer on the concrete mixing unit and then replaced when the contents of the bins are depleted to operate the mixer continuously.