Non-self-weight collapsible loess area manure pit backfill material and backfill method

The invention relates to a non-self-weight collapsible loess area manure pit backfill material and a backfill method. The non-self-weight collapsible loess area manure pit backfill material comprisesthe following raw materials in parts by mass: 65-74 parts of loess, 3-20 parts of cement, 2-5 parts of fly ash, 1-5 parts of a dispersing agent, 5-8 parts of ultrafine powder and 15-25 parts of water.Self-compaction and loess solidification can be achieved, the strength, the volume stability and the permeability of the loess are good, and the compactness of backfilling of the fertilizer tank andthe safety, the applicability and the durability of a building are guaranteed. 本发明涉及一种非自重湿陷性黄土区域肥槽回填材料及回填方法。回填材料包括以下质量配比的原料：黄土65-74份、水泥3-20份、粉煤灰2-5份、分散剂1-5份、超细粉5-8份和水15-25份。本发明可实现自密实、固化黄土，其强度、体积稳定性和渗透性好，保证了肥槽回填的密实性，建筑物的安全性以及适用性和耐久性。