Geopolymer-coated high-strength lightweight aggregate and preparation method thereof: Fid-Bau Portal

Geopolymer-coated high-strength lightweight aggregate and preparation method thereof

MA BIN / CHEN ZHIYUAN / LAN LIGENG / ZHAO JUN / HUANG XIAOLIN

The invention provides geopolymer-coated high-strength lightweight aggregate and a preparation method thereof, and relates to the technical field of building material preparation. The geopolymer-coated high-strength lightweight aggregate is prepared from the following raw materials in parts by weight: 48 to 52 parts of fly ash, 48 to 52 parts of slag, 67 to 72 parts of lightweight aggregate, 43 to 45 parts of water glass, 5 to 6 parts of sodium hydroxide and 20 to 22 parts of water. Wherein the particle size of the fly ash is 300-400 meshes, the particle size of the slag is 800-1000 meshes, and the particle size of the lightweight aggregate is 5-10 mm; the mixing amount ratio of the lightweight aggregate to the powder is less than 80%. The preparation method provided by the invention is low in cost, green and environment-friendly and excellent in mechanical property, and the geopolymer-coated lightweight aggregate with excellent performance is prepared through the steps of carrying out ultrasonic cleaning, drying and mixing on the lightweight aggregate, carrying out vacuum treatment, maintaining, carrying out ultrasonic cleaning again and the like. Under the same density, the cylinder compressive strength of the coated lightweight aggregate reaches more than three times of the industrial standard requirement.

本发明提供了一种地聚合物裹覆高强轻骨料及其制备方法，涉及建筑材料制备技术领域。该地聚合物裹覆高强轻骨料按重量份计包括如下原料：粉煤灰48～52份，矿渣48～52份，轻骨料67～72份，水玻璃43～45份，氢氧化钠5～6份，水20～22份；其中，粉煤灰的粒度为300～400目，矿渣的粒度为800～1000目，轻骨料的粒径为5～10mm；轻骨料与粉体的掺量比小于80％。本发明提供了一种成本低廉、绿色环保、力学性能优越的制备方法，通过将轻骨料超声清洗、烘干、混合，经真空处理、养护和再超声清洗等步骤，制备出性能优良的地聚合物裹覆轻骨料。该裹覆轻质骨料在同等密度下其筒压强度达到了行业标准要求的3倍以上。

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