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研究了单掺改性材料(水泥、石灰、石膏、粉煤灰和矿渣)对生土材料吸放湿性能的影响,采用等温吸放湿法对其吸放湿性能进行测试;为了更好的反映改性生土材料吸放湿性能变化规律,与未改性生土材料相比,利用XRD、FT-IR、SEM手段对其生成产物、结构组成及微观形貌进行了分析。结果表明:改性生土材料较纯生土材料的吸放湿性低,但是当石膏掺量为8%时,仍然能保持较优的吸放湿性能的同时,其力学性能明显优于纯生土材料。
The effects of single modified materials (cement, lime, gypsum, fly ash and slag) on the moisture absorption and desorption properties of raw soil were studied. The adsorption and desorption properties were tested by isothermal absorption and desorption wetting method. The changes of moisture absorption and desorption properties of the modified raw soil were compared. Compared with the unmodified raw soil, the products, structure and microstructure were analyzed by XRD, FT-IR and SEM. The results showed that the modified soil-forming material had lower moisture absorption and desorption than pure soil, but its mechanical properties were better than pure soil when the content of gypsum was 8% Soil material.