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Modified geological polymer marine concrete and preparation method

A geopolymer and marine concrete technology, applied in cement production, etc., can solve problems such as accelerated diffusion of harmful ions, concrete deformation and cracking, poor crack resistance, etc., to prevent chloride ion erosion, compact structural system, and prevent corrosion of steel bars Effect

Inactive Publication Date: 2019-05-21
湖南鑫长胜材料科技有限公司 +1
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

These methods cannot fundamentally solve the corrosion of concrete matrix and steel bar corrosion by ions in seawater. The reason is that ordinary cement hydration products contain a large number of crystalline phases. Chlorine and magnesium ions easily react with the crystalline phases in the product, resulting in no cementation. The product of performance leads to loose structure, even causes concrete deformation and cracking, and accelerates the diffusion of harmful ions
[0005] Aiming at the deficiencies of the prior art, the present invention provides a modified geopolymer marine concrete and a preparation method to solve cracks on the surface of concrete structures caused by natural factors such as seawater and external loads, thereby causing corrosion of steel bars problems; compared with other sea sand and seawater concrete, it solves the problems of seawater erosion, steel bar corrosion, and poor crack resistance

Method used

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Embodiment 1

[0024] In this embodiment, by mass percentage, it includes 10% sea water, 20% sea sand, 40% crushed stone, 0.5% water reducing agent, 10% slag, 5% silica fume, 10% fly ash, 2% fiber, Calcined magnesite 5%, activator 0.2%.

[0025] In this embodiment, the preparation method of the modified geopolymer seawater sea sand concrete is as follows:

[0026] 1) Weigh the raw materials according to the above weight percentages and reserve them for use

[0027] 2) Put the weighed slag, fly ash, and silica fume into the concrete mixer according to the proportion and mix it for 1 minute, stop the mixing, and obtain a uniform dry material;

[0028] 3) Weigh a certain amount of activator and sea water, add it to the concrete mixer and stir for 1 min, then add magnesite and fiber reinforcement to the mixer and stir for 2 min to make it evenly mixed;

[0029] 4) Use a sieve to sieve out the shells in the sea sand, add the crushed stone and sea sand to the mixer in turn, and stir for 30 seconds; then ad...

Embodiment 2

[0032] In this embodiment, by mass percentage, it includes 10% sea water, 20% sea sand, 40% crushed stone, 0.5% water reducing agent, 10% slag, 5% silica fume, 10% fly ash, 2% fiber, Calcined magnesite 15%, stimulant 0.2%.

[0033] In this embodiment, the preparation method of the modified geopolymer seawater sea sand concrete is as follows:

[0034] 1) Weigh the raw materials according to the above weight percentages and reserve them for use

[0035] 2) Put the weighed slag, fly ash, and silica fume into the concrete mixer according to the proportion and mix it for 1 minute, stop the mixing, and obtain a uniform dry material;

[0036] 3) Weigh a certain amount of activator and sea water, add it to the concrete mixer and stir for 1 min, then add magnesite and fiber reinforcement to the mixer and stir for 2 min to make it evenly mixed;

[0037] 4) Use a sieve to sieve out the shells in the sea sand, add the crushed stone and sea sand to the mixer in turn, and stir for 30 seconds; then a...

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Abstract

The invention relates to modified geological polymer seawater and sea sand concrete and a preparation method. The concrete is prepared from, by mass, 5-15% of seawater, 10-30% of sea sand, 30-55% of macadam, 0.1-1% of a water reducing agent, 10-30% of slag, 5-10% of silicon powder, 5-15% of pulverized fuel ash, 0-5% of fibers, 5-15% of calcined magnesite and 0.1-0.5% of an exciting agent. Comparedwith other seawater and sea sand concrete, the modified geological polymer marine concrete is good in chloride ion penetration resistance and further has good crack resistance, the prepared modifiedgeological polymer marine concrete can prevent rebar erosion and resist invasion of harmful ions of external seawater, the strength of the concrete is also improved to a certain degree, and the durability of a concrete structure is further improved.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a modified geopolymer marine concrete and a preparation method. Background technique [0002] my country is a country with severe drought and water shortage. Per capita freshwater resources are only 1 / 4 of the world average, ranking 110th in the world, and one of the poorest countries in the world with per capita water resources. The amount of water available per capita is only 900 cubic meters, and the distribution is extremely uneven. At the end of the 20th century, more than 400 cities out of more than 600 cities across the country had problems with water supply. Among them, there were 110 cities with serious water shortages. The total water shortage in cities across the country was 6 billion cubic meters. With the construction of a large number of projects, the continuous consumption of fresh water and river sand resources has brought huge costs to the pro...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B111/24
CPCY02P40/10
Inventor 王潇潇沈增晖王威李九苏黄志轩孙韵华郑英李杰
Owner 湖南鑫长胜材料科技有限公司
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