Concrete curing agent and preparation process thereof

Abstract

The invention discloses a concrete curing agent and a preparation process thereof. The concrete curing agent is prepared from the following raw materials in parts by weight: 40-60 parts of lithium silicate, 10-20 parts of a silane coupling agent, 6-12 parts of nano titanium dioxide, 10-30 parts of a modified water reducing agent, 10-20 parts of an expanding agent and 50-80 parts of water. According to the concrete curing agent and the preparation process thereof, a modified naphthalene water reducer and an oxidized etherified starch water reducer are introduced into a stirrer to be mixed and stirred uniformly to obtain a composite naphthalene water reducer, the modified naphthalene water reducer contains a large number of hydroxyl groups (-OH) and carboxyl groups (-COOH), the hydroxyl groups (-OH) and calcium ions on the surfaces of cement particles are adsorbed to form a film, hydroxyl groups can form hydrogen bonds with the surface of cement to prevent hydration, a retarding effect on cement hydration is achieved, and an oxidized etherified starch water reducing agent and a naphthalene water reducing agent are compounded, so that the purposes of increasing the water reducing rate, improving the slump retaining property and improving the later strength of concrete are achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a concrete curing agent and a preparation process thereof. Background technique [0002] Concrete curing agent is a colorless, transparent, convenient construction, non-toxic, odorless, non-combustible, strong penetration, liquid or powder material that can permanently seal concrete. The strength of concrete mainly comes from the silicon and calcium in the cement components in concrete. The calcium silicate compound generated under the action of water, C-S-H is the material that plays a major role in the strength of concrete. The interior of the concrete is still undergoing a slow C-S-H hydration reaction after the initial setting of the concrete. This reaction cannot be completely completed under natural conditions. There is always a large amount of free, active silicate ions contained in Jinzhu liquid high-permeability seal curing agent react with free calcium ions i...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a concrete curing agent and its preparation process, which solves the problem of poor durability of the concrete curing agent prepared from sodium-based salts and the tendency of efflorescence to affect the floor effect in the later stage. problems, and during the preparation of the concrete curing agent, the concrete curing agent adheres to the inner wall of the reactor, reducing the rate of obtaining the concrete curing agent

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