Porous concrete waterproofing agent and preparation method thereof

Abstract

The invention discloses a porous concrete waterproofing agent and a preparation method thereof. The waterproofing agent is prepared from, by weight, 25-40 parts of modified gel, 4-6 parts of an oxidizing agent, 5-9 parts of a cross-linking agent and 3-5 parts of a photoinitiator; the modified gel is prepared from, by weight, 30-40 parts of pretreated microspheres, 25-30 parts of 3,4-dihydroxyphenylacetic acid, 15-20 parts of N-hydroxysuccinimide, 15-20 parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 18-25 parts of sodium alginate and 10-14 parts of propyne. According to the porous concrete waterproofing agent and he preparation method thereof, process design is simple, and component proportion is reasonable; chitosan and sodium alginate are modified, and a Michael addition reaction and a chemical click reaction are used for forming a compact double-gel network, so the waterproof and seepage-proof performance of concrete can be effectively improved in use, meanwhile, the waterproofing agent can be self-repaired, and the waterproofing agent can be widely applied to concrete construction and has high practicability.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a porous concrete waterproofing agent and a preparation method thereof. Background technique [0002] Waterproofing agent, a kind of chemical admixture, is added to cement. When the cement sets and hardens, the volume expands accordingly, which plays the role of compensating shrinkage, tensioning steel bars to generate prestress, and fully filling cement gaps. [0003] For concrete impermeability and waterproofing, this has always been the focus of research in the field of concrete materials, and it is also a hot topic that researchers are more concerned about; the cause of concrete leakage is mostly caused by the appearance of concrete cracks and the formation of seepage channels. The service life is short, the waterproof durability is poor, the repair cost is high in engineering applications, and the practicability is poor. [0004] Aiming at this problem, we disclose a porou...

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Problems solved by technology

[0003] For concrete impermeability and waterproofing, this has always been the focus of research in the field of concrete materials, and it is also a hot topic that researchers are more concerned about; the cause of concrete leakage is mostly caused by the appearance of concrete cracks and the formation of seepage channels. Today's waterproof materials Short service life, poor waterproof durability, high repair cost and poor practicability in engineering applications

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