Quick plasticizer for concrete with low water-binder ratio, and preparation method of quick plasticizer

Abstract

The invention discloses a quick plasticizer for concrete with a low water-binder ratio, wherein the first component comprises carboxymethyl cellulose sodium, sodium hydrogen persulfate, sodium p-styrenesulfonate, methyl allyl polyoxyethylene ether and water, the second component comprises glyceryl monostearate, calcium sulphoaluminate and alkyl glycoside, the third component comprises starch ether, stearic acid, polyvinyl alcohol and sodium dodecyl benzene sulfonate, and the fourth component is a maleimide aqueous solution. The method comprises the following steps: heating the third component,adding the first component and the second component into the third component in a dropwise manner at the same time, adding the fourth component in a dropwise manner after the first component and thesecond component are added into the third component, and neutralizing until the pH value is 7 to obtain the quick plasticizer for the concrete with the low water-binder ratio. According to the invention, the plasticizing speed can be greatly accelerated, the plasticizing time is shortened to be within 20 seconds, the production efficiency is improved, the production cost is reduced, the water consumption of concrete is reduced, the fluidity of the concrete is increased, the leveling property is remarkable, the flow velocity is increased, the early strength of the concrete is increased, and theperformance of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a fast plasticizer for concrete with a low water-binder ratio and a preparation method thereof. Background technique [0002] Concrete refers to the artificial stone made of cement as the main cementitious material, mixed with water, sand, stones, chemical admixtures and mineral admixtures when necessary, mixed in appropriate proportions, uniformly stirred, compacted and cured. Concrete is mainly divided into two stages and states: the plastic state before setting and hardening, that is, fresh concrete or concrete mixture; the hard state after hardening, that is, hardened concrete or concrete. [0003] The strength and most of the properties of concrete are closely related to the water-binder ratio. In the case of a certain cementitious material, the larger the water-binder ratio, the lower the concrete strength, and the smaller the water-binder ratio, the greater the ...

AI Technical Summary

Problems solved by technology

The mixing and plasticizing time of low water-binder ratio concrete (such as RPC, UHPC and other special concrete) is generally more than 120 seconds. The plasticizing time is long, which requires long-term mixing production, which increases production costs and affects the use of low water-binder ratio concrete.