Cement capable of slowing setting by additives

Abstract

The invention relates to cement capable of slowing setting by additives. The cement comprises at least one first microcapsule and at least one second microcapsule; the first microcapsule has a hollowstructure, the interior of the first microcapsule is provided with a first additive, and the first microcapsule is put in the cement; the interior of the first microcapsule is provided with at least one second microcapsule, and the interior of the second microcapsule is filled by a second additive; and the first microcapsule and the second microcapsule can be slightly exploded by energization of ahigh-frequency coil, after the second microcapsule is slightly exploded, the first additive and the second additive are mixed, and after the first microcapsule is slightly exploded, the mixed additive and the cement is mixed. According to the concrete disclosed by the invention, the high-frequency coil generates a magnetic field after being energized, the first microcapsule and the second microcapsule can be prepared by mixing high-molecular organic matter and metal particles, when the metal particles generate an eddy flow in the magnetic field, the second microcapsule and the first microcapsule are slightly exploded in sequence, and after the mixed material and the cement are mixed, setting time of the cement is delayed; and the concrete is convenient to use.

Description

technical field [0001] The present invention relates to cement, in particular to cement retarded by additives. Background technique [0002] Cement is a powdery hydraulic inorganic gelling material. It can be mixed with water to form a slurry. It can be hardened in the air or better hardened in water, and can firmly bind sand, stone and other materials together. Early lime and volcanic ash The mixture is very similar to lime pozzolanic cement, use it to glue concrete which made of crushed stone. After hardening, it not only has high strength, but also can resist the erosion of fresh water or salt water. For a long time, as an important cementing material, it is widely used in civil engineering, water conservancy, national defense and other projects. [0003] There are no additives in the traditional cement, the plasticizing effect is poor, and the shrinkage of the concrete cannot be reduced. The content of harmful substances is high, and the hardening speed in the air is fa...

AI Technical Summary

Problems solved by technology

[0003] There are no additives in the traditional cement, the plasticizing effect is poor, and the shrinkage of the concrete cannot be reduced. The content of harmful substances is high, and the hardening speed in the air is fast, which makes the cement unable to be transported, so that the cement has hardened during the short transportation. , cannot be used, and some additives are not added through micro-explosion, which makes it difficult to control the time of adding additives, and the mixing of additives is more troublesome and not very practical

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