Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Special compound admixture for marine concrete

A composite admixture and marine concrete technology, which is applied in the field of marine engineering, can solve the problems of difficulty in the use and maintenance of concrete engineering, and the inability to ensure the safety, durability, and long-term effect of concrete structures, so as to achieve excellent later strength, increase density, reduce The effect of destruction

Active Publication Date: 2017-08-11
UNIV OF JINAN
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the absence of special concrete for marine engineering, a large number of experimental studies must be carried out before each project is constructed to determine the concrete mix ratio and admixture system required for the project, and the safety and security of the concrete structure cannot be guaranteed. durable, long-lasting
Chloride ions, magnesium ions and sulfate ions in seawater participate in the hydration reaction, and react with cement hydration products CH and C-S-H gels to form new insoluble salts, which change the internal stress of concrete, and other soluble salts are repeated in seawater. Dissolution under the action of scouring not only brings adverse effects on the production and construction of marine concrete, but also increases difficulties in the use and maintenance of concrete projects in the future

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Special compound admixture for marine concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A special composite admixture for marine concrete, which is composed of the following raw materials in weight percentage: 11% high-grade material, 32% ground quartz sand, 12% waste silicon powder, 22% chloride ion adsorbent, and 6% sodium nitrite %, sodium sulfate 4%, calcium sulfoaluminate 9%, polycarboxylate superplasticizer 4%.

[0016] The metakaolin is obtained by calcining kaolin at a high temperature of 600°C-900°C, ground to a fineness of 1250 mesh, an average particle size of 12μm, and a specific surface area of ​​450m 2 / Kg.

[0017] The fineness of the quartz sand is 1250 mesh, the average particle size is 12 μm, and the specific surface area is 440m 2 / Kg, SiO 2 The content is greater than 90%.

[0018] The waste silicon powder is an industrial by-product of producing polycrystalline silicon wafers, with a fineness of 6000 mesh, an average particle size of 2.5 μm, and a specific surface area of ​​1000 m 2 / Kg, SiO 2 Content > 95%.

[0019] The chlorine...

Embodiment 2

[0021] A special composite admixture for marine concrete, which is composed of the following raw materials in weight percentage: 15% high-grade soil, 26% ground quartz sand, 20% waste silicon powder, 18% chloride ion adsorbent, 5% sodium nitrite %, sodium sulfate 5%, calcium sulfoaluminate 7%, polycarboxylate superplasticizer 4%.

[0022] The metakaolin is obtained by calcining kaolin at a high temperature of 600°C-900°C, and is ground to a fineness of 2000 mesh, with an average particle size of 7.5μm and a specific surface area of ​​600m 2 / Kg.

[0023] The fineness of the ground quartz sand is 2000 mesh, the average particle size is 7.5 μm, and the specific surface area is 510m 2 / Kg, SiO 2 The content is greater than 90%.

[0024] The waste silicon powder is an industrial by-product of the production of polycrystalline silicon wafers, with a fineness of 10,000 mesh, an average particle size of 1.5 μm, and a specific surface area of ​​1800 m 2 / Kg, SiO 2 Content > 95%. ...

Embodiment 3

[0028] A special composite admixture for marine concrete, which is composed of the following raw materials in weight percentage: 20% of high-grade material, 21% of ground quartz sand, 26% of waste silicon powder, 15% of chloride ion adsorbent, and 5% of sodium nitrite %, sodium sulfate 4%, calcium sulfoaluminate 6%, polycarboxylate superplasticizer 3%.

[0029] The metakaolin is obtained by calcining kaolin at a high temperature of 600°C-900°C, and is ground to a fineness of 3000 mesh, with an average particle size of 5 μm and a specific surface area of ​​750m 2 / Kg.

[0030] The fineness of the ground quartz sand is 3000 mesh, the average particle size is 5 μm, and the specific surface area is 628m 2 / Kg, SiO 2 The content is greater than 90%.

[0031] The waste silicon powder is an industrial by-product of the production of polycrystalline silicon wafers, with a fineness of 20,000 mesh, an average particle size of 0.75 μm, and a specific surface area of ​​2,300 m 2 / Kg, ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Finenessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a special compound admixture for marine concrete and a preparation method of the admixture and belongs to the technical application field of inorganic nonmetallic materials. The admixture is prepared from raw materials in percentage by weight as follows: 11%-28% of metakaolin, 16%-32% of refined quartz sand, 12%-31% of waste silica powder, 8%-22% of a chloride ion adsorbent, 4%-6% of sodium nitrite, 3%-6% of sodium sulfate, 5%-9% of calcium sulphoaluminate and 2%-4% of a polycarboxylate superplasticizer. The materials used by the special compound admixture for marine concrete are common and available components, and the marine concrete prepared from the admixture has higher early strength and later strength, higher anti-penetrability performance and sulfate corrosion resistance and low chloride ion diffusion coefficient.

Description

technical field [0001] The invention relates to the field of marine engineering, in particular to a special composite admixture for marine concrete. Background technique [0002] The 21st century is the century of the ocean. Atomic energy, marine technology, and aerospace technology are called the important content of the three cutting-edge technological revolutions in the contemporary world. my country has a vast sea area, with a coastline of more than 18,000 kilometers, spanning almost all climate zones. With the construction of large-scale projects such as ocean development, coastal nuclear power, military and civilian port construction, coastal wind power stations, oil drilling and chemical engineering, cross-sea bridges, and submarine tunnels, people have become particularly concerned about the durability of marine concrete. However, due to the absence of special concrete for marine engineering, a large number of experimental studies must be carried out before each pro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B22/14C04B111/24C04B111/74
CPCC04B14/06C04B14/106C04B22/085C04B22/14C04B22/147C04B40/0039C04B2111/24C04B2111/74C04B2103/302C04B2103/0078C04B20/008
Inventor 刘福田张康刘云
Owner UNIV OF JINAN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com