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High-strength ultralight cement based composite material and preparation method thereof

A composite material and ultra-lightweight technology, applied in the field of concrete, can solve the problems of unconsidered resistance to chloride ion corrosion resistance, low strength, and corrosion of steel bars, and achieve excellent chloride ion permeability resistance, good application prospects, and low effect of density

Active Publication Date: 2018-08-24
CCCC SECOND HARBOR ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] CN 106007599 A discloses an ultra-lightweight concrete and its preparation method. The components contain cementitious materials (Portland cement, granulated blast furnace slag, silica fume), hollow glass microspheres, water reducing agent, water, latex , polyvinyl alcohol fiber, the density is 650kg / m 3 , but the strength is too low at 8.1-8.3MPa to be used in offshore construction materials
[0004] CN 107602019 A discloses an ultra-lightweight concrete, the components of which contain cement, floating beads, silica fume, water reducing agent, water, fly ash, limestone powder, free state calcium oxide, polypropylene fiber or steel fiber or its Combination, shrinking agent, water reducing agent, the density of the concrete is 1179-1380kg / m 3 , 50-65.5MPa at 30°C, and 8.2-19.4MPa at 900°C, so this concrete is used in high-temperature burst-resistant building components, and its density higher than water makes it impossible to apply to offshore building materials
[0005] The special environment at sea will cause the concrete to be corroded by chloride ions, and the corrosion of steel bars is very serious. The above-mentioned ultra-lightweight concrete has not considered the important index of resistance to chloride ion corrosion resistance. Therefore, it is necessary to develop a low density, high strength, and anti-corrosion Ultra-light composite material with good chloride ion permeability and its preparation method, promoting the construction of floating buildings on the sea

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  • High-strength ultralight cement based composite material and preparation method thereof
  • High-strength ultralight cement based composite material and preparation method thereof

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Embodiment 1

[0029] An ultra-light cement-based composite material provided in this implementation includes the following components: cementitious material, hollow glass microspheres, polycarboxylate-based high-performance water reducer, water,

[0030] Among them, the mass ratio of gelling material, polycarboxylate high-performance water reducer and water is 100:2:100;

[0031] The volume ratio of gelling material to hollow glass microspheres is 1:5;

[0032] The cementitious material is obtained by mixing the following components in mass percentage: 62.5% of cement, 25% of floating beads, 5% of silica fume, 2.5% of phosphogypsum, and 5% of polyaluminum chloride.

[0033] The technical process of the preparation method of the above-mentioned ultra-light cement-based composite material is as follows: figure 1 As shown, the specific steps are:

[0034] (1) Place the hollow glass microspheres in a saturated lime water solution at 17-23°C and stir for 2 hours, then rinse until neutral, dry at...

Embodiment 2

[0038] An ultra-light cement-based composite material provided in this implementation includes the following components: cementitious material, hollow glass microspheres, polycarboxylate-based high-performance water reducer, water,

[0039] Among them, the mass ratio of gelling material, polycarboxylate high-performance water reducing agent and water is 100:2.5:200;

[0040] The volume ratio of gelling material to hollow glass microspheres is 1:4;

[0041] The cementitious material is obtained by mixing the following components in mass percentage: 57% of cement, 25% of floating beads, 10% of silica fume, 3% of phosphogypsum, and 5% of polyaluminum chloride.

[0042] The technical process of the preparation method of the above-mentioned ultra-light cement-based composite material is as follows: figure 1 As shown, the specific steps are:

[0043] (1) Place the hollow glass microspheres in a saturated lime water solution at 17-23°C and stir for 2 hours, then rinse until neutral...

Embodiment 3

[0047] An ultra-light cement-based composite material provided in this implementation includes the following components: cementitious material, hollow glass microspheres, polycarboxylate-based high-performance water reducer, water,

[0048] Among them, the mass ratio of gelling material, polycarboxylate high-performance water reducing agent and water is 100:1.5:160;

[0049] The volume ratio of gelling material to hollow glass microspheres is 1:7;

[0050] The cementitious material is obtained by mixing the following components in mass percentage: 69% of cement, 19.5% of floating beads, 5.5% of silica fume, 2% of phosphogypsum, and 4% of polyaluminum chloride.

[0051] The technical process of the preparation method of the above-mentioned ultra-light cement-based composite material is as follows: figure 1 As shown, the specific steps are:

[0052] (1) Place the hollow glass microspheres in a saturated lime water solution at 17-23°C and stir for 2 hours, then rinse until neut...

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Abstract

The invention discloses a high-strength ultralight cement based composite material. The high-strength ultralight cement based composite material is characterized by being prepared from the following components: a cementing material, hollow glass beads, a polycarboxylate superplasticizer and water, wherein the mass ratio of the cementing material, the polycarboxylate superplasticizer and the wateris 100:(1-2.5):(100-200), and the volume ratio of the cementing material to the hollow glass beads is 1:(3-8); the cementing material is prepared from components in percentage by mass as follows: 57%-78% of cement, 15%-25% of floating beads, 3%-10% of silica fume, 1%-3% of ardealite and 3%-5% of polyaluminum chloride, and the sum of percentages by mass of the cement, the floating beads, the silicafume, the ardealite and polyaluminum chloride is 100%. The low-density and high-strength ultralight cement based composite material is obtained under cooperation of the cementing material and the hollow glass beads, has better resistance to chloride ion penetration and has better application prospect in offshore floating buildings.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a high-strength ultra-light cement-based composite material and a preparation method thereof. Background technique [0002] Ultra-light cement-based composite material refers to the bulk density of less than 1000kg / m 3 , a cement-based material that is less dense than water. The existing cement-based materials with a bulk density less than water mainly include foam concrete and aerated concrete, that is, air is introduced into the concrete to form a honeycomb cavity. in engineering load-bearing structures. The use of hollow glass microspheres as a component to reduce the density of concrete has become a trend for ultra-lightweight concrete. [0003] CN 106007599 A discloses an ultra-lightweight concrete and its preparation method. The components contain cementitious materials (Portland cement, granulated blast furnace slag, silica fume), hollow glass microspheres, water reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/40C04B111/24
CPCC04B28/04C04B2111/24C04B2111/40C04B2201/20C04B2201/50C04B14/22C04B2103/302C04B18/08C04B18/146C04B22/144C04B22/12
Inventor 张国志张永涛陈飞翔黄灿朱浩王紫超周仁忠项梁郑建新荀东亮陈尚雷翁方文刘丹丁巍李浩黎晖白佳曹高威
Owner CCCC SECOND HARBOR ENG