Impermeable self-compacting concrete and preparation method thereof

Abstract

The invention relates to impermeable self-compacting concrete and a preparation method thereof, and belongs to the technical field of concrete preparation. The preparation method comprises the following steps: firstly, taking aluminum sulfate as an aluminum source, urea as a precipitator and methyl amyl alcohol as a dispersing agent, preparing superfine spherical aluminum oxide with the particle size of 200nm, high dispersity and good spherical roundness through an auxiliary homogeneous precipitation method, then preparing porous silicon carbide, adhering tetraethoxysilane into the porous silicon carbide, and performing packaging with paraffin to prepare a self-made dense filler. The two self-made additives are used for improving the compactness and the impermeability of the final concrete material, and the concrete has a wide application prospect.

Description

technical field

[0001] The invention relates to an anti-seepage self-compacting concrete and a preparation method thereof, belonging to the technical field of concrete preparation. Background technique

[0002] Known concrete components are rigid structures. At present, the evaluation of known concrete components pays more attention to compressive strength. Therefore, the existing concrete components have strong compressive strength, and the concrete components are brittle, and the surface is prone to cracks and damages; the main reason After the concrete is solidified, the capillary porosity in it is relatively high, and the splitting tensile strength is poor. In this way, under the action of frequent or instantaneous heavy pressure or impact force, the concrete component will be frequently or extremely loaded and cracks will appear on the surface of the component. , damaged, under the pressure of internal and external water underground, water seepage is prone to occur. ...

Examples

example 1

[0043] Mix a urea solution with a concentration of 1 mol / L and an aluminum sulfate solution with a concentration of 0.05 mol / L at a molar ratio of 20:1 to obtain a mixed solution, and mix the obtained mixed solution with methyl amyl alcohol at a mass ratio of 50:1 Then put it into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, control the filling degree to 50%, conduct a hydrothermal reaction at 90°C for 12 hours, cool and filter to obtain a filter cake, and use pure water and absolute ethanol to ultrasonically cross-wash respectively 5 times, freeze-dried and then calcined at a high temperature in a box-type resistance furnace for 3 hours, and then discharged to obtain ultra-fine spherical alumina; weighed rice husks, washed them, put them in a carbonization furnace, and kept carbonized at 400°C for 2 hours to obtain carbonized rice husks , mix carbonized rice husk and iron powder with a mass ratio of 100:1, put them into a vacuum furnace, pass argon into...

example 2

[0045] Mix a urea solution with a concentration of 1 mol / L and an aluminum sulfate solution with a concentration of 0.05 mol / L at a molar ratio of 20:1 to obtain a mixed solution, and mix the obtained mixed solution with methyl amyl alcohol at a mass ratio of 50:1 Then put it into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, control the filling degree to 50%, conduct a hydrothermal reaction at 90°C for 12 hours, cool and filter to obtain a filter cake, and use pure water and absolute ethanol to ultrasonically cross-wash respectively 5 times, freeze-dried and then calcined at a high temperature in a box-type resistance furnace for 3 hours, and then discharged to obtain ultra-fine spherical alumina; weighed rice husks, washed them, put them in a carbonization furnace, and kept carbonized at 400°C for 2 hours to obtain carbonized rice husks , mix carbonized rice husk and iron powder with a mass ratio of 100:1, put them into a vacuum furnace, pass argon into...

example 3

[0047]Mix a urea solution with a concentration of 1 mol / L and an aluminum sulfate solution with a concentration of 0.05 mol / L at a molar ratio of 20:1 to obtain a mixed solution, and mix the obtained mixed solution with methyl amyl alcohol at a mass ratio of 50:1 Then put it into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, control the filling degree to 50%, conduct a hydrothermal reaction at 90°C for 12 hours, cool and filter to obtain a filter cake, and use pure water and absolute ethanol to ultrasonically cross-wash respectively 5 times, freeze-dried and then calcined at a high temperature in a box-type resistance furnace for 3 hours, and then discharged to obtain ultra-fine spherical alumina; weighed rice husks, washed them, put them in a carbonization furnace, and kept carbonized at 400°C for 2 hours to obtain carbonized rice husks , mix carbonized rice husk and iron powder with a mass ratio of 100:1, put them into a vacuum furnace, pass argon into ...

technical field

[0001] The invention relates to an anti-seepage self-compacting concrete and a preparation method thereof, belonging to the technical field of concrete preparation. Background technique

[0002] Known concrete components are rigid structures. At present, the evaluation of known concrete components pays more attention to compressive strength. Therefore, the existing concrete components have strong compressive strength, and the concrete components are brittle, and the surface is prone to cracks and damages; the main reason After the concrete is solidified, the capillary porosity in it is relatively high, and the splitting tensile strength is poor. In this way, under the action of frequent or instantaneous heavy pressure or impact force, the concrete component will be frequently or extremely loaded and cracks will appear on the surface of the component. , damaged, under the pressure of internal and external water underground, water seepage is prone to occur. ...

Examples

example 1

[0043] Mix a urea solution with a concentration of 1 mol / L and an aluminum sulfate solution with a concentration of 0.05 mol / L at a molar ratio of 20:1 to obtain a mixed solution, and mix the obtained mixed solution with methyl amyl alcohol at a mass ratio of 50:1 Then put it into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, control the filling degree to 50%, conduct a hydrothermal reaction at 90°C for 12 hours, cool and filter to obtain a filter cake, and use pure water and absolute ethanol to ultrasonically cross-wash respectively 5 times, freeze-dried and then calcined at a high temperature in a box-type resistance furnace for 3 hours, and then discharged to obtain ultra-fine spherical alumina; weighed rice husks, washed them, put them in a carbonization furnace, and kept carbonized at 400°C for 2 hours to obtain carbonized rice husks , mix carbonized rice husk and iron powder with a mass ratio of 100:1, put them into a vacuum furnace, pass argon into...

example 2

[0045] Mix a urea solution with a concentration of 1 mol / L and an aluminum sulfate solution with a concentration of 0.05 mol / L at a molar ratio of 20:1 to obtain a mixed solution, and mix the obtained mixed solution with methyl amyl alcohol at a mass ratio of 50:1 Then put it into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, control the filling degree to 50%, conduct a hydrothermal reaction at 90°C for 12 hours, cool and filter to obtain a filter cake, and use pure water and absolute ethanol to ultrasonically cross-wash respectively 5 times, freeze-dried and then calcined at a high temperature in a box-type resistance furnace for 3 hours, and then discharged to obtain ultra-fine spherical alumina; weighed rice husks, washed them, put them in a carbonization furnace, and kept carbonized at 400°C for 2 hours to obtain carbonized rice husks , mix carbonized rice husk and iron powder with a mass ratio of 100:1, put them into a vacuum furnace, pass argon into...

example 3

[0047]Mix a urea solution with a concentration of 1 mol / L and an aluminum sulfate solution with a concentration of 0.05 mol / L at a molar ratio of 20:1 to obtain a mixed solution, and mix the obtained mixed solution with methyl amyl alcohol at a mass ratio of 50:1 Then put it into a hydrothermal reaction kettle with a polytetrafluoroethylene liner, control the filling degree to 50%, conduct a hydrothermal reaction at 90°C for 12 hours, cool and filter to obtain a filter cake, and use pure water and absolute ethanol to ultrasonically cross-wash respectively 5 times, freeze-dried and then calcined at a high temperature in a box-type resistance furnace for 3 hours, and then discharged to obtain ultra-fine spherical alumina; weighed rice husks, washed them, put them in a carbonization furnace, and kept carbonized at 400°C for 2 hours to obtain carbonized rice husks , mix carbonized rice husk and iron powder with a mass ratio of 100:1, put them into a vacuum furnace, pass argon into ...

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