The invention discloses a 3D concrete material for printing, which is prepared from the following components in percentage by weight: 20 to 30 percent of
Portland cement, 12 to 16 percent of sulphoaluminate
cement, 6 to 8 percent of compound
fiber, 10 to 20 percent of mineral admixture, 20 to 40 percent of compound fine aggregate, 0.5 to 1 percent of water
reducing agent, 0 to 1 percent of accelerator, 1 to 2 percent of
cellulose ether and 10 to 12 percent of water. According to the 3D printing concrete material disclosed by the invention, the formula of the cementing material is adjusted, and the
Portland cement and the sulphoaluminate
cement with the early strength characteristic are jointly used as the cementing material, so that the early hydration speed and the early strength of concrete can be adjusted, and a rapid
hardening effect is achieved; the recycled fine aggregate is used for partially replacing traditional fine aggregate such as natural
river sand, smooth pumping of materials in the 3D printing process is facilitated, and recycling of waste resources can be achieved; the steel fibers and the
basalt fibers are used together, so that the
investment cost can be reduced, the
composite material is more suitable for being used in various environments, and the
fiber reinforcement effect can be fully exerted.