High-strength and high performance lightweight aggregate and preparation method thereof

A high-performance, lightweight aggregate technology, applied in the fields of ceramic products, climate sustainability, and other household appliances, can solve the problems of difficulty in preparing ultra-high-strength lightweight aggregate concrete, high energy consumption, high power consumption, and low cylinder compressive strength and other problems, to achieve the effect of low production cost, low water absorption and low energy consumption

Active Publication Date: 2009-06-17
CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the generally low cylinder compressive strength (7

Method used

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  • High-strength and high performance lightweight aggregate and preparation method thereof
  • High-strength and high performance lightweight aggregate and preparation method thereof
  • High-strength and high performance lightweight aggregate and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0029] Example 1:

[0030] A high-strength and high-performance lightweight aggregate, which is prepared from solid raw materials and sodium water glass solution, and the mass ratio of sodium water glass solution (also known as sodium water glass) to solid raw materials is 0.65:1; The raw material is composed of metakaolin and gas-generating agent raw materials. The mass percentages of metakaolin and gas-generating agent in the solid raw material are: metakaolin 99.75% and gas-generating agent 0.25%.

[0031] The metakaolin is a commercially available coal-based kaolin, obtained by calcining at 700° C. for 7 hours; the gas-generating agent is aluminum powder; the modulus of the sodium water glass is 1.5, and the Baumé degree is 40.

[0032] The preparation method of the above-mentioned high-strength and high-performance lightweight aggregate comprises the following steps:

[0033] 1) According to the mass percentage of each raw material in the solid raw material: metakaolin 9...

Example Embodiment

[0051] Example 2:

[0052] A high-strength and high-performance lightweight aggregate, which is prepared from solid raw materials and potassium water glass solution, and the mass ratio of potassium water glass solution to solid raw materials is 0.52:1; wherein, the solid raw materials are composed of metakaolin, steel slag, The composition of fly ash, slag and gas-generating agent raw materials, the mass percentage of metakaolin, steel slag, fly ash, slag, and gas-generating agent in the solid raw materials is: metakaolin 39.7%, steel slag 10%, pulverized coal Ash 20%, slag 30%, gas generating agent 0.3%.

[0053] The metakaolin is a commercially available coal-based kaolin, obtained by calcining at 740°C for 5 hours; the steel slag is the waste slag in the steelmaking production process, with a specific surface area of ​​4700cm 2 / g; Described fly ash is Class I fly ash; Described slag is granulated blast furnace slag powder, specific surface area 4200cm 2 / g; the gas gener...

Example Embodiment

[0074] Example 3:

[0075] A high-strength and high-performance lightweight aggregate is prepared from solid raw materials and potassium water glass solution, and the mass ratio of potassium water glass solution to solid raw material is 0.73:1; wherein, the solid raw material is composed of metakaolin, steel slag and The composition of aluminum powder raw materials, the mass percentages of metakaolin, steel slag and aluminum powder in the solid raw materials are: metakaolin 89.7%, steel slag 10%, aluminum powder 0.3%.

[0076] The metakaolin is a commercially available coal-based kaolin, obtained by calcining at 670°C for 6 hours; the steel slag is the waste slag in the steelmaking production process, with a specific surface area of ​​4500cm 2 / g; the modulus of the potassium water glass solution is 1.8, and the Baume degree is 41.

[0077] The preparation method of the above-mentioned high-strength and high-performance lightweight aggregate comprises the following steps:

...

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Abstract

The invention belongs to the field of inorganic non-metallic material, and in particular relates to a light aggregate with high strength and high performance and a preparation method thereof. The light aggregate with high strength and high performance is characterized in that the light aggregate is prepared from solid raw materials and water glass solution, and the mass ratio of the water glass solution to the solid raw materials is 0.3-0.8:1, wherein the solid raw materials consist of metakaolin, steel slag, coal ash, mineral slag and foaming agent; each raw material in the solid raw materials by mass percentage comprises: 30 to 99.9 percent of the metakaolin, 0 to 30 percent of the steel slag, 0 to 50 percent of the coal ash, 0 to 70 percent of the mineral slag, and 0.1 to 0.5 percent of the foaming agent; and the sum of the each raw material in the solid raw materials by mass percentage is 100 percent. The method has the advantages of simple process and low production cost; and the light aggregate with high strength and high performance prepared by the method has the characteristic of high cylinder pressing strength.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a high-strength and high-performance lightweight aggregate and a preparation method thereof. Background technique [0002] Lightweight aggregate concrete has been widely used in various types of prefabricated components and cast-in-place concrete projects in industrial and civil buildings due to its light weight, fire resistance, heat insulation, thermal insulation, and good seismic performance, especially in high-rise and long-span structures. more superior. However, due to the generally low cylinder compressive strength (<8MPa), high water absorption and high brittleness of artificial lightweight aggregates at present, and the high energy consumption and power consumption in the production process, it is difficult to prepare ultra-high-strength (>70MPa) high-performance aggregates. lightweight aggregate concrete. In order to meet the high-stre...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/10C04B18/14C04B18/08C04B18/12
CPCC04B28/008C04B18/021Y02P40/10Y02W30/91C04B14/044C04B18/08C04B18/12C04B18/142C04B38/10
Inventor 杨文吴文贵王军孙克平吴静黄波
Owner CHINA STATE CONSTR READY MIXED CONCRETE CO LTD
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