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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the generally low cylinder compressive strength (70MPa) high-performance aggregates. lightweight aggregate concrete

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
Comparison scheme
Effect test

Embodiment 1

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

[0031] The metakaolin is commercially available coal series kaolin, which is obtained by calcining at 700° C. for 7 hours; the gas-generating agent is aluminum powder;

[0032] A kind of preparation method of above-mentioned high-strength and high-performance lightweight aggregate, it comprises the steps:

[0033] 1) According to the mass percentage of each raw material in the solid raw material: metakaolin 99.75%, aluminum powder 0.25%, select metakaolin and aluminum powd...

Embodiment 2

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

[0053] The metakaolin is commercially available coal series kaolin, which is obtained by calcination at 740°C for 5 hours; the steel slag is waste slag from the steelmaking process, with a specific surface area of ​​4700 cm 2 / g; the described fly ash is Class I fly ash; the described slag is granulated blast furnace slag powder with a specific surface area of ​​4200cm 2 / g; the gas-generating agent is aluminum powder; the...

Embodiment 3

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

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

[0077] A kind of preparation method of above-mentioned high-strength and high-performance lightweight aggregate, it comprises the steps:

[0078] 1) According t...

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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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