Abstract: A color-adjustable repairing agent and a preparation method therefor, and concrete containing the repairing agent are disclosed in the present invention; the repairing agent is a mixture of microbial powder, dopamine and a calcium source immobilized by cement; and according to total mass of the mixture, a mass percentage of the microbial powder is 44%-54%, a mass percentage of the dopamine is 1%-5%, and a mass percentage of the calcium source is 44%-54%; according to the present invention, dopamine is mixed into a microbial self-repairing agent, a cement-immobilized microbial self-repairing agent is used for preparing repairing agent particles, a crack area of microbial self-repairing concrete is repaired, and repairing performance of the concrete and a color of a repairing product of the crack area are tested.

Abstract: A microbial repairing agent production line includes a feeder, where the feeder is connected to a storage bin, the bottom of the storage bin is connected to a metering tank, the metering tank is in communication with a granulator through a spiral or pneumatic conveying apparatus, a screening device is arranged below the granulator, and a discharge port of the screening device is connected to one end of a conveyor belt; a production process for includes: conveying a raw material to a storage bin through a feeder; then adding the raw materials to a metering tank in sequence through a spiral or pneumatic conveying apparatus, and metering and weighing the raw materials; conveying metered raw materials into a granulator; discharging the microbial repairing agent; and screening the microbial repairing agent, and collecting and maintaining the microbial repairing agent.