Composite environment-friendly brick and preparation method thereof

The invention discloses a composite environment-friendly brick and a preparation method thereof. The composite environment-friendly brick comprises the following components in parts by weight: 15-30 parts of mineral slag powder, 10-20 parts of diatomaceous earth, 6-15 parts of cement, 3-10 parts of waterborne polyurethane, 3-7 parts of plasticized starch, 2-5 parts of a flame retardant, 14-20 parts of a mildew preventive, 12-18 parts of volcanic ash, 10-15 parts of coal ash, 15-20 parts of plant ash, 8-16 parts of gypsum, 15-25 parts of a water reducer, 12-22 parts of a foaming stabilizer and5-15 parts of water. The composite environment-friendly brick is simple in preparation process, has high brick body strength, is resistant to crack, saves energy, is friendly to the environment, has remarkable economic benefits and is suitable for popularization. 本发明公开了种复合环保砖及其制备方法，其包括：以下按重量份计的组成成分：矿渣粉15～30份、硅藻土10～20份、水泥6～15份、水性聚氨酯3～10份、塑化淀粉3～7份、阻燃剂2～5份、防霉剂14～20份、火山灰12～18份、煤灰10～15份、草木灰15～20份、石膏8～16份、减水剂15～25份、发泡稳定剂12～22份、