Alkali-activated cementing material capable of controlling setting time as well as control method and application thereof

Abstract

The invention relates to a cementing material capable of controlling setting time as well as a setting time control method thereof and application of the cementing material in concrete, comprising the adopted cementing material, a method for controlling the setting time of an alkali-activated cementing material by virtue of an external electric field as well as a product and a method which apply the material and the method to the concrete. By adopting the material and method of the technical scheme, hydration process of the concrete can be sped up according to requirements after the concrete is moulded, setting and hardening time is controlled, and the prepared concrete has long setting time, so that construction performance requirements are met; meanwhile, the setting and hardening time can be shortened and early strength can be improved according to requirements; besides, environmental temperature during hydration can be guaranteed by utilizing concentrated and rapidly released hydration thermal produced by controlling the setting time, and the problem that normal hydration can not be carried out in negative temperature environment is solved.

Description

technical field [0001] The invention relates to a cementitious material capable of controlling the setting time, a method for controlling the setting time and its application in concrete. The external electric field accelerates the hydration rate of the gelling material, and realizes the controllable coagulation within the normal coagulation time. Background technique [0002] The history of human survival and development is a history of the development of various materials. Building materials are constantly updated and developed along with the development of human beings. Concrete material has good plasticity before setting, good mechanical properties and durability after hardening. Therefore, concrete is currently the most widely used building material, and it is also the preferred basic material for various construction infrastructures. Concrete can be classified according to different cementitious materials, such as Portland cement concrete, alkali slag concrete, sulp...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the technical solution of the present invention is to provide a cementitious material that can control the setting time and a method for controlling the setting time. After the concrete is formed, its hydration process can be accelerated according to the demand, and the setting and hardening time can be controlled. The prepared concrete not only has a long setting time to meet the construction performance requirements, but also can shorten the setting and hardening time and improve the early strength according to the demand, that is, the setting time of the concrete can be changed according to the demand when the concrete has been poured and formed; In addition, the concentrated and rapid release of heat of hydration brought about by controlling the coagulation time can be used to ensure the ambient temperature of hydration and solve the problem of abnormal hydration in a negative temperature environment.

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