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Marine sulphoaluminate cement for rapid construction and preparation method thereof

A technology of marine sulphoaluminate and sulphoaluminate cement, which is applied in the field of marine sulphoaluminate cement for rapid construction and its preparation, and can solve the problem that the concrete construction conditions and construction time cannot be guaranteed, and cannot meet the rapid construction of the project , affect the normal construction of concrete and other issues, to achieve the effect of high resistance to chloride ion diffusion, good compactness, and high resistance to sulfate erosion

Inactive Publication Date: 2020-01-03
广西云燕特种水泥建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of marine climate and tides, the concrete construction conditions and construction time of engineering structures such as ports, bridges, etc. in the marine environment are often not guaranteed. Under the rapid construction requirements of the project
Although there are many cements or concretes used for rapid construction, most of them are used for land construction and do not have corrosion resistance, so they are not suitable for marine engineering.
At present, there are few special cements and concretes suitable for rapid construction under marine conditions. In marine engineering construction, ordinary cement can only be used to prepare concrete, and measures such as concrete early strength agents are used for construction. However, there are still problems such as slow development of compressive strength and low Poor corrosion resistance, short service life and other technical problems, which affect the normal construction of concrete in the marine environment

Method used

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  • Marine sulphoaluminate cement for rapid construction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]A marine sulphoaluminate cement for rapid construction, made of the following raw materials in parts by weight: 40 parts of sulphoaluminate cement clinker, 5 parts of modified nano-calcium carbonate, 0.05 parts of high-efficiency water reducer, and accelerator 4 parts, 6 parts of anti-cracking and waterproof expansion agent, 3 parts of redispersible latex powder, 10 parts of clinker sea sand, 2 parts of silica fume, 6 parts of granulated blast furnace slag powder, and 0.01 part of modified graphene.

[0028] The modified nano-calcium carbonate is prepared by mixing dry nano-calcium carbonate and SP-1800 polyester hyperdispersant in a weight ratio of 10:1, and stirring at a constant temperature of 110° C. for 30 minutes.

[0029] The high-efficiency water reducer includes modified melamine and polycarboxylate water reducer, the weight ratio of which is 1:2, and the fineness of modified melamine is below 100 mesh.

[0030] The accelerator is composed of potassium metaalumi...

Embodiment 2

[0040] A marine sulphoaluminate cement for rapid construction, made of the following raw materials in parts by weight: 50 parts of sulphoaluminate cement clinker, 8 parts of modified nano-calcium carbonate, 0.1 part of high-efficiency water reducer, and accelerator 2 parts, 7 parts of anti-cracking and waterproof expansion agent, 4 parts of redispersible latex powder, 12 parts of clinker sea sand, 4 parts of silica fume, 8 parts of granulated blast furnace slag powder, and 0.05 part of modified graphene.

[0041] The modified nano-calcium carbonate is prepared by mixing dry nano-calcium carbonate and SP-1800 polyester hyperdispersant in a weight ratio of 10:1, and stirring at a constant temperature of 110° C. for 30 minutes.

[0042] The high-efficiency water reducer includes modified melamine and polycarboxylate water reducer, the weight ratio of which is 1:2, and the fineness of modified melamine is below 100 mesh.

[0043] The accelerator is composed of potassium metaalumin...

Embodiment 3

[0053] A marine sulphoaluminate cement for rapid construction, made of the following raw materials in parts by weight: 60 parts of sulphoaluminate cement clinker, 10 parts of modified nano-calcium carbonate, 0.2 parts of high-efficiency water reducer, anti-cracking and waterproof 8 parts of expansion agent, 5 parts of redispersible latex powder, 15 parts of clinker sea sand, 5 parts of silica fume, 10 parts of granulated blast furnace slag powder, and 0.1 part of modified graphene.

[0054] The modified nano-calcium carbonate is prepared by mixing dry nano-calcium carbonate and SP-1800 polyester hyperdispersant in a weight ratio of 10:1, and stirring at a constant temperature of 110° C. for 30 minutes.

[0055] The high-efficiency water reducer includes modified melamine and polycarboxylate water reducer, the weight ratio of which is 1:2, and the fineness of modified melamine is below 100 mesh.

[0056] The anti-crack and waterproof expansion agent is a GNA high-efficiency ant...

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Abstract

The invention discloses marine sulphoaluminate cement for rapid construction and a preparation method thereof. The marine sulphoaluminate cement is prepared from the following raw materials in parts by weight: 40-60 parts of sulphoaluminate cement clinker, 5-10 parts of modified nano calcium carbonate, 0.05-0.2 part of an efficient water reducing agent, 0-4 parts of a setting accelerator, 6-8 parts of an anti-cracking waterproof expanding agent, 3-5 parts of redispersible latex powder, 10-15 parts of clinker sea sand, 2-5 parts of silica fume, 6-10 parts of granulated blast furnace slag powderand 0.01-0.1 part of modified graphene. Concrete prepared from the marine sulphoaluminate cement can be quickly cured, has high early strength, can reach the demolding strength earlier, can be widelyapplied to ocean engineering buildings, and meets the requirement of quick construction in an ocean environment.

Description

technical field [0001] The invention relates to the technical field of marine engineering building materials, in particular to marine sulphoaluminate cement for rapid construction and a preparation method thereof. Background technique [0002] Sulphoaluminate cement (CSA) was successfully developed by the my country Academy of Building Materials Science in 1975, and won the second prize of the National Invention Award in 1982. It is made of bauxite, limestone and gypsum according to a certain ratio, calcined at a low temperature (1300-1350) ° C to generate calcium sulfoaluminate (C 4 A 3 S̅) and dicalcium silicate (C 2 S) Clinker as the main mineral phase is ground together with an appropriate amount of gypsum, and it is a hydraulic cementitious material with the characteristics of short setting time, high early strength and low alkalinity. When grinding sulphoaluminate cement, part of the mixture (limestone and fly ash, etc.) is usually added as needed. Sulphoaluminate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/24
CPCC04B28/06C04B2111/24C04B2201/50C04B14/28C04B2103/302C04B2103/12C04B2103/65C04B2103/0057C04B14/068C04B18/146C04B18/141C04B14/022
Inventor 王志通杨毅黄芳蒙传刚
Owner 广西云燕特种水泥建材有限公司
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