Abstract
Large amount of Tertiary mudstones appears by the major construction works, and the efficient use of mudstone is expected. But it is well known that Tertiary mudstone exhibits “slaking.” In order to use mudstone with advantage, it is necessary to understand the effect of the slaking on mechanical behavior. Tertiary mudstones are used in assembly of crushed mudstone pebbles on using for construction. So, one-dimensional compression tests are carried out for the assembly of two types of Tertiary mudstones having a different resistance to slaking. And then these one-dimensional compression properties are simulated by the SYS Cam-clay model. The findings are as follows.(1) The stress state of the mudstone pebbles with a low resistance to slaking can be existed below the normal consolidation line (NCL) of the remolded mudstone under loading in e-σv, space, while the mudstone pebbles with a high resistance to slaking can be existed above the NCL.(2) Through the model, the mudstone assembly with a low resistance to slaking can be regarded as sand, of which structure collapses quickly and overconsolidation loses slowly, while the mudstone assembly with a high resistance to slaking can be regarded as clay, of which structure decays slowly and overconsolidation loses quickly.
