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A kind of high impermeability concrete and preparation method thereof

A concrete and high-resistance technology, applied in the field of concrete, can solve the problems of poor concrete penetration resistance, etc., and achieve the effect of improving compactness and high volume stability

Active Publication Date: 2021-02-09
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of poor concrete impermeability, the present invention provides a high impermeability concrete, which improves the impermeability of concrete by increasing the compactness, reducing the connectivity rate of pores, and adjusting the stability of materials

Method used

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  • A kind of high impermeability concrete and preparation method thereof

Examples

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Comparison scheme
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Embodiment 1

[0026] A high impermeability concrete is prepared from the following raw materials in parts by mass: 220 parts of modified cement, 230 parts of modified steel slag powder, 30 parts of water-absorbing resin, 900 parts of coarse aggregate, 900 parts of fine aggregate and 100 parts of water.

[0027] The modified cement consists of 400 parts of sulfoaluminate cement, 20 parts of water-absorbing resin and 10 parts of nano silicon dioxide. Preparation method of modified cement: mix water-absorbent resin and nano-silica, stir for 5 minutes while using microwave to disperse to eliminate agglomeration, then mix with sulphoaluminate cement and stir for 10 minutes.

[0028] The preparation method of modified steel slag powder: grind the steel slag to a fineness of 200-250m 2 / kg, soak in 30% sodium hydroxide solution for 2 hours, steam at 60°C and 1.6MP for 0.5 hour, rinse and dry. Then at 400°C CO 2 Calcined in atmosphere for 4 hours.

[0029] The coarse aggregate is: 420 parts of 1...

Embodiment 2

[0033] A high impermeability concrete is prepared from the following raw materials in parts by mass: 270 parts of modified cement, 180 parts of modified steel slag powder, 50 parts of water-absorbing resin, 600 parts of coarse aggregate, 1300 parts of fine aggregate and 160 parts of water.

[0034] The modified cement is composed of 450 parts of sulfoaluminate cement, 50 parts of water-absorbing resin and 5 parts of nano silicon dioxide. Preparation method of modified cement: mix water-absorbent resin and nano-silica, stir for 10 minutes while using microwave to disperse to eliminate agglomeration, then mix with sulphoaluminate cement and stir for 20 minutes.

[0035] The preparation method of modified steel slag powder: grind the steel slag to a fineness of 200-250m 2 / kg, soak in 30% sodium hydroxide solution for 3 hours, steam at 80°C and 0.8MP for 1.5 hours, rinse and dry. Then at 450°C CO 2 Calcined in atmosphere for 2 hours.

[0036] The coarse aggregate is: 300 parts...

Embodiment 3

[0040] A high impermeability concrete is prepared from the following raw materials in parts by mass: 240 parts of modified cement, 200 parts of modified steel slag powder, 40 parts of water-absorbing resin, 720 parts of coarse aggregate, 1200 parts of fine aggregate and 120 parts of water.

[0041] The modified cement is composed of 420 parts of sulfoaluminate cement, 30 parts of water-absorbing resin and 8 parts of nano silicon dioxide. Preparation method of modified cement: mix water-absorbing resin and nano-silica, stir for 7 minutes while using microwave dispersion to eliminate agglomeration, then mix with sulphoaluminate cement and stir for 12 minutes.

[0042] The preparation method of modified steel slag powder: grind the steel slag to a fineness of 200-250m 2 / kg, soak in 30% sodium hydroxide solution for 2.2 hours, steam at 70°C and 1.0MP for 0.8 hours, rinse and dry. Then at 410°C CO 2 Calcined in atmosphere for 2.5 hours.

[0043] The coarse aggregate is: 340 parts...

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Abstract

The invention provides a high impermeability concrete, which is prepared from the following raw materials in parts by mass: 220-270 parts of modified cement, 180-230 parts of modified steel slag powder, 30-50 parts of water-absorbing resin, and 600-parts of coarse aggregate 900 parts, fine aggregate 900‑1300 parts and water 100‑160 parts. The modified cement is composed of 400-450 parts of sulphoaluminate cement, 20-50 parts of water-absorbing resin and 5-10 parts of nano silicon dioxide. By increasing the compactness, reducing the connectivity rate of pores, and adjusting the stability of the material, the purpose of improving the permeability resistance of concrete is achieved.

Description

technical field [0001] The invention belongs to the field of concrete, in particular to a high-impermeability concrete and a preparation method thereof. Background technique [0002] Sulphoaluminate cement concrete has been widely used in marine projects such as docks, cross-sea bridges and island reef projects due to its high resistance to sulfate erosion, wide range of raw material sources and strong adaptability. However, concrete itself is a gas-liquid-solid three-phase porous structure, and corrosion and freeze-thaw damage will inevitably occur during marine engineering service. Therefore, it is necessary to increase the compactness of concrete itself to improve its impermeability and durability. At present, many researchers use mathematical models to study the influence of particle size distribution on the bulk density of solid particles and the properties of hardened paste, such as particle microgradation, that is, the optimization of particle size distribution betwee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B5/06C04B111/27
CPCC04B5/06C04B28/065C04B2111/27C04B2201/50C04B2201/52C04B2103/0051C04B14/062C04B18/142C04B14/00
Inventor 宫晨琛王子荣吴波芦令超程新
Owner UNIV OF JINAN