本文以西北粘土为对象,对其压实行为、热传导、膨胀特性,以及吸附和渗透性能进行了初步研究,借以探讨西北粘土在高放废物处置中用作回填材料的可行性。试验表明,以西北粘土为基材,经过适当的热改性和吸附改性,在初始含水量约为9%,于70MPa 下成型,用作高放废物处置中的回填材料是可行的。 In this paper, the Northwest clay as the object, its compaction behavior, heat conduction, swelling characteristics, as well as the adsorption and permeability of a preliminary study to explore the feasibility of Northwest clay for the disposal of high level waste for backfill. Experiments show that it is feasible to use northwestern clay as the substrate, which has been modified by appropriate thermal modification and adsorption. The initial moisture content is about 9% and is formed at 70MPa. It is feasible to use it as backfill material in HLW disposal.