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
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[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...
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[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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