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Concrete filler and preparation method thereof

A technology for concrete and filler materials, which is applied in the field of concrete pressure-resistant materials, concrete fillers and their preparation, which can solve the problems of insufficient pressure resistance, complicated preparation methods, and high costs, and achieve the effect of improving the ability of pressure resistance

Inactive Publication Date: 2013-01-16
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the concrete fillers in the prior art have insufficient seepage pressure resistance, and the preparation method is complicated and the cost is high.

Method used

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  • Concrete filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 prepares the method for nanoscale magnesium oxide magnesium chloride calcium carbonate mixture

[0025] Law one

[0026] (1) Mix calcium hydroxide, ammonium chloride and water, filter after 10 minutes to obtain filter residue A. Calcium hydroxide, ammonium chloride and water are mixed in a molar ratio of 1:2:5. Filter residue A is calcium chloride.

[0027] (2) Mix carbon ammonia, filter residue A and water, and filter with filter paper to obtain filter residue B after 10 minutes. The molar ratio of carbon ammonia, filter residue A and water is 2:1:5. Filter residue B was washed with water five times, placed in an electric blast drying oven at 110°C and dried for 1 hour to obtain nanometer calcium carbonate.

[0028] (3) Add 50 mol of nano-calcium carbonate and 50 mol of light magnesium oxide powder into 1 liter of magnesium chloride aqueous solution with a concentration of 50 mol / L, react in a 90-degree water bath under stirring conditions for 20 minut...

Embodiment 2

[0037] Example 2 concrete filler

[0038] Recipe 1

[0039] Portland cement: refined quartz sand: nano-sized magnesium oxide calcium chloride magnesium calcium carbonate mixture is 27:70:2.

[0040] Recipe 2

[0041] Portland cement: refined quartz sand: nano-sized magnesium oxide calcium chloride magnesium calcium carbonate mixture is 27:70:5.

[0042] Recipe 3

[0043] Portland cement: refined quartz sand: nano-sized magnesium oxide calcium chloride magnesium calcium carbonate mixture is 27:70:3.

[0044] Recipe 4

[0045] Portland cement: refined quartz sand: nano-sized magnesium oxide calcium chloride magnesium calcium carbonate mixture is 27:70:1.

[0046] Recipe 5

[0047] Portland cement: refined quartz sand: nano-sized magnesium oxide calcium chloride magnesium calcium carbonate mixture is 27:70:6.

[0048] Prepare the concrete filler according to the above 5 recipes.

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Abstract

The invention provides a concrete filler material and belongs to the field of materials. The concrete filler consists of the following components in part by weight: 27 parts of Portland cement, 70 parts of refined quartz sand, and 2 to 5 parts of nano magnesium oxide, magnesium chloride and calcium carbonate mixture. A preparation method for the nano magnesium oxide, magnesium chloride and calcium carbonate mixture comprises the following steps of: preparing nano calcium carbonate; adding nano calcium carbonate and light magnesium oxide powder into a magnesium chloride aqueous solution; reacting with stirring at the temperature of between 80 and 100 DEG C; aging at the temperature of between 40 and 60 DEG C, and filtering to obtain filter residues C; washing the filter residues C by using water and an organic solvent, and filtering to obtain filter residues D; and drying the filter residues D to obtain the nano magnesium oxide, magnesium chloride and calcium carbonate mixture. The concrete filler is excellent in using performance, high compressive capacity and low in cost.

Description

technical field [0001] The invention belongs to the field of concrete materials, relates to a concrete filler and a preparation method thereof, and belongs to concrete pressure-resistant materials. Background technique [0002] At present, the properties and preparation of concrete fillers are research hotspots. However, the concrete filler in the prior art has insufficient osmotic pressure resistance, and the preparation method is complicated and the cost is high. For example, the invention patent with the application number 201110288095.8 discloses a pressure-resistant material, which is composed of the following components mixed in proportion (mass percentage): ultrafine mineral powder: 35% to 65%, fly ash: 15% to 30% %, calcium hydroxide: 8% to 20%, nano silicon dioxide: 1% to 3%, organic silicon additives: 5% to 14%, sodium polyacrylate: 0% to 2.4%, polycarboxylate superplasticizer : 0.1% to 1.5%. Contents of the invention [0003] The invention provides a concrete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/04C04B28/04
Inventor 蒋晓龙赵浩峰王玲邱奕婷张咏林莹莹郑泽昌张金花陆阳平刘光宇
Owner NANJING UNIV OF INFORMATION SCI & TECH
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