A kind of fiber reinforced composite gel cement material and preparation method thereof

Abstract

The invention provides a fiber-reinforced compound gel cement material and a production method thereof. The fiber-reinforced compound gel cement material comprises the following components in parts byweight: 30-40 parts of poly(2-hydroxyethyl methacrylate), 30-40 parts of an organic-inorganic double-network polymer, 15-20 parts of plant fibers, 10-20 parts of bentonite nano-particles, 10-15 partsof tricalcium phosphate, 5-10 parts of a redox system initiator and 4-8 parts of a cross-linking agent. By adopting the redox system initiator and the cross-linking agent to introduce plant fiber reinforcement and by grafting the organic-inorganic double-network polymer, which is produced from industrial production waste, onto the plant fibers to achieve a good graft copolymerization effect withthe poly(2-hydroxyethyl methacrylate), the bending strength and the ductility of the synthesized cement material are reinforced, and the synthesized cement material is not liable to break, and is notliable to be corroded; and by adding graphene, a cement system can form a self-monitoring system for monitoring various parameters of cement.

Description

technical field [0001] The invention relates to cement, which belongs to the technical field of building materials, in particular to a fiber-reinforced composite gel cement material and a preparation method thereof. Background technique [0002] Cement concrete is one of the building materials widely used in the world today. However, some non-mechanical failures often occur in cement concrete structures before reaching the designed service life. Sulfate attack damage is one of the common non-mechanical damage forms of concrete. my country has a vast ocean area and a long coastline. The concentration of sulfate ions in seawater is about 2.54-3.06g / L, while the salt content in coastal saline soil is generally higher than 5%. Therefore, the cement concrete structure in the marine environment is During service, it will inevitably be corroded by sulfate in seawater[. For example, some marine projects, sea-crossing bridges, offshore oil production platforms, seaports, and subsea ...

AI Technical Summary

Problems solved by technology

Some concrete structures such as roads, bridges and tunnels, ground and underground buildings, underground pipelines, and utility poles and towers in the western region were severely damaged due to sulfate erosion after only a few years of use, and large-scale restoration work had to be carried out, consuming Huge maintenance costs resulting in huge economic losses

It can be seen that the problem of sulfate corrosion of concrete is a very prominent problem in my country, not only because of the high maintenance costs of damaged concrete structures, but also because of the lack of cement materials that are resistant to corrosion, high in bending resistance and not easy to break from the source.

[0004] Chinese patent 201710897493.7 discloses an environmentally friendly decorative cement. The technical solution uses: Portland cement, expansion agent, metakaolin, silica fume, whiskers, redispersible latex powder, water reducer, defoamer, fiber Materials such as plain ether, heavy calcium, and environmentally friendly materials are used to prepare cement. Although environmentally friendly materials are used, and they have workability and corrosion resistance, a large amount of water reducers, defoamers, and cellulose are used in the materials used. Auxiliary additives such as ether, which lead to large porosity of decorative cement, the corrosion resistance effect is not particularly good, and the environmental protection materials used cannot be well integrated with Portland cement clinker, which reduces the resistance of the finished cement material. Compressive strength and ductility, easy to break

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