Anti-corrosive concrete grouting material for coastal structure connection and method for preparing the same

Patent metadata

Field	Value
Publication number	US-12319618-B2
Application number	US-202017619534-A
Country	US
Kind code	B2
Filing date	Jul 30, 2020
Priority date	Jul 10, 2020
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

An anti-corrosive concrete grouting material for coastal structure connection and a method for preparing the same, belonging to the technical field of anti-corrosion of coastal assembled structure connectors. The grouting material includes the following components: expansible compound cement, slag sand, fly ash (FA), polyvinyl alcohol (PVA) (containing an oxidant and a catalyst), graphene oxide (GO), a water reducer, an adjusting admixture, a defoaming agent, a mineral admixture and water. A shrinkage-free effect of the grouting material is realized through internal curing of GO-PVA hydrogel, micro-expansion of the compound cement and shrinkage reduction effect of the FA; an energy storage effect of a GO-PVA hydrogel micro-capacitor is exerted to avoid formation of a reinforcement corrosion micro-battery in a grouting material sleeve, a reinforcement corrosion self-immune effect is achieved, seawater corrosion resistance of the grouting material is improved by the slag sand, and it has huge economic and environmental protection benefits.

First claim

What is claimed is:

1. An anti-corrosive concrete grouting material for coastal structure connection, wherein the anti-corrosive concrete grouting material for coastal structure connection consists of the following raw materials in parts by weight: 1 part of expansible compound cement, 1-2 parts of slag sand, 0.05-0.2 part of fly ash, 0.005-0.05 part of polyvinyl alcohol, 0.0002-0.002 part of graphene oxide, 0.005-0.01 part of a water reducer, 0.005-0.01 part of an adjusting admixture, 0.0001-0.001 part of a defoaming agent, 0-0.05 part of a mineral admixture and 0.25-0.55 part of water, wherein:
the polyvinyl alcohol and graphene oxide are prepared into a GO-PVA prepolymer solution by adopting an in-situ polymerization and intercalation method, and
the fly ash is coated with the GO-PVA prepolymer solution to obtain GO-PVAH@FA.

2. The anti-corrosive concrete grouting material for coastal structure connection according to claim 1 , wherein the grouting material consists of the following raw materials in parts by weight: 1 part of the expansible compound cement, 1-1.5 parts of the slag sand, 0.05-0.1 part of the fly ash, 0.005-0.025 part of the polyvinyl alcohol, 0.0002-0.001 part of the graphene oxide, 0.005-0.0075 part of the water reducer, 0.005-0.0075 part of the adjusting admixture, 0.0001-0.0005 part of the defoaming agent, 0-0.025 part of the mineral admixture and 0.25-0.4 part of water;
or the grouting material consists of the following raw materials in parts by weight: 1 part of the expansible compound cement, 1.5-2 parts of the slag sand, 0.1-0.2 part of the fly ash, 0.025-0.05 part of the polyvinyl alcohol, 0.001-0.002 part of the graphene oxide, 0.0075-0.01 part of the water reducer, 0.0075-0.01 part of the adjusting admixture, 0.0005-0.001 part of the defoaming agent, 0.025-0.05 part of the mineral admixture and 0.4-0.55 part of water.

3. A method comprising applying the anti-corrosive concrete grouting material for coastal structure connection according to claim 2 in construction of coastal structure engineering, wherein the coastal structure engineering comprises offshore buildings, bridges and tunnels, wind and nuclear power plants, oil drilling platforms, seaports and wharfs.

4. The anti-corrosive concrete grouting material for coastal structure connection according to claim 1 , wherein the expansible compound cement consists of the following raw materials in parts by weight: 1 part of sulphoaluminate cement, 0.65-1.25 parts of Portland cement and 0-0.15 part of gypsum.

5. A method comprising applying the anti-corrosive concrete grouting material for coastal structure connection according to claim 4 in construction of coastal structure engineering, wherein the coastal structure engineering comprises offshore buildings, bridges and tunnels, wind and nuclear power plants, oil drilling platforms, seaports and wharfs.

6. The anti-corrosive concrete grouting material for coastal structure connection according to claim 1 , wherein the slag sand is one or a combination of more of blast furnace heavy slag sand, steel slag sand, titanium steel slag sand, copper nickel slag sand and nickel iron slag sand.

7. A method comprising applying the anti-corrosive concrete grouting material for coastal structure connection according to claim 6 in construction of coastal structure engineering, wherein the coastal structure engineering comprises offshore buildings, bridges and tunnels, wind and nuclear power plants, oil drilling platforms, seaports and wharfs.

8. The anti-corrosive concrete grouting material for coastal structure connection according to claim 1 , wherein the water reducer is one or an optimized combination of more of polycarboxylic acid high-efficiency water reducer, naphthalene sodium sulfonate high-efficiency water reducer or melamine resin high-efficiency water reducer;
or the adjusting admixture is one of gluconate retarder, citric acid, tartaric acid and salt retarders thereof or lignosulfonate water-reducing retarder;
or the defoaming agent is one of silicone, polyether and polyether modified polysiloxane defoaming agents;
or the mineral admixture is one or a combination of more of ground slag, fly ash, volcanic ash, silica fume or zeolite powder;
or the water is one of distilled water, deionized water or tap water.

9. A method comprising applying the anti-corrosive concrete grouting material for coastal structure connection according to claim 8 in construction of coastal structure engineering, wherein the coastal structure engineering comprises offshore buildings, bridges and tunnels, wind and nuclear power plants, oil drilling platforms, seaports and wharfs.

10. A method comprising applying the anti-corrosive concrete grouting material for coastal structure connection according to claim 1 in construction of coastal structure engineering, wherein the coastal structure engineering comprises offshore buildings, bridges and tunnels, wind and nuclear power plants, oil drilling platforms, seaports and wharfs.

Assignees

• Univ Qingdao Technology

Inventors

• Luo Jianlin
• Zhang Jigang
• Li Qiuyi
• Gao Song
• Zhang Peng
• Teng Fei

Classifications

• C04B2111/76

  Use at unusual temperatures, e.g. sub-zero · CPC title

• C04B2111/70

  Grouts, e.g. injection mixtures for cables for prestressed concrete · CPC title

• C04B2111/24

  Sea water resistance · CPC title

• C04B2103/50

  Defoamers, air detrainers · CPC title

• C04B2103/302

  Water reducers · CPC title