Geopolymer artificial aggregate based on crushing method and preparation method thereof

Abstract

The invention discloses a geopolymer artificial aggregate based on a crushing method and a preparation method thereof. The preparation method comprises the following steps: mixing a cementing material, an alkali activator and water, and stirring to obtain slurry; maintaining the slurry for the first time to obtain hardened geopolymer slurry; crushing the geopolymer slurry to obtain geopolymer aggregate particles; and carrying out secondary maintenance on the geopolymer aggregate particles to obtain the geopolymer artificial aggregate, wherein the cementing material is prepared from the following components in percentage by mass: 50%-100% of a main material and 0%-50% of a secondary material. The crushing technology adopted by the invention is easy to operate, high energy consumption is notneeded, and cement does not need to be added, so that the problem that a large amount of greenhouse gas is discharged during cement calcination is avoided. In addition, the strength of the artificialaggregate is increased along with the increase of the placement time. 本发明公开一种基于破碎方法的地聚合物人工骨料及其制备方法。所述制备方法包括步骤：将胶凝材料、碱激发剂和水混合，并搅拌，得到浆体；将所述浆体进行第一次养护，得到硬化的地聚合物浆体；将所述地聚合物浆体进行破碎处理，得到地聚合物骨料颗粒；将所述地聚合物骨料颗粒进行第二次养护，得到所述地聚合物人工骨料；其中，按质量百分比计，所述胶凝材料由主要材料50％‑100％和次要材料0％‑50％组成。本发明所采用的破碎技术操作简单，无需高耗能，且无需添加水泥，从而避免了水泥煅烧排放大量温室气体的问题。另外，本发明人工骨料强度随放置时间的增加而增长。