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首页> 外文期刊>Ground improvement >Stiffness and strength mobilisation in steel-slag-mixed dredged clays in early curing
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Stiffness and strength mobilisation in steel-slag-mixed dredged clays in early curing

机译：在早期固化中钢 - 渣混合疏浚粘土的刚度和力量动员

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摘要

The presence of portlandite (Ca(OH)(2)) in steel slag leads to potential hydration capacity, and this can be exploited to improve the engineering properties of high-water-content dredged clays. The strength and stiffness mobilisation characteristics of four dredged clays from Japan mixed with two steel slags were continuously investigated from early hours to 28 d of curing in this study, by using direct shear apparatus and bender elements, which allowed testing of mixed specimens from the initial, soft, uncemented states. The stiffness and strength increase rates in the second, main stage of evolution in the clay-slag mixtures were found to be loosely correlated to the amount of amorphous silica. The correlation was also influenced by the amount of portlandite in the slags. The results can be used to screen out clays that are hard to solidify in the medium term, based on quick on-site measurement of the amorphous silica content. For quality control in practice, the strength-stiffness relationship was critically examined as a means to assess the strength using non-destructive stiffness probes. Close observation revealed that to represent a wide range of curing time and mixing conditions by a single line, as proposed in existing studies, could be misleading. A new interpretation for the relationship is proposed.
机译：钢渣中的波特兰石（CA（OH）（2））导致潜在的水合能力，这可以利用，以改善高水含量疏浚粘土的工程性能。通过使用直接剪切装置和弯曲元件，连续研究来自日本与两种钢渣混合的日本与两种钢渣混合的四个疏浚粘土的强度和刚度动员特性。 ，软，未发言的国家。第二次刚度和强度提高速率，发现粘土渣混合物中的进化的主要阶段被发现与无定形二氧化硅的量松散地相关。相关性也受到渣中波特兰数量的影响。基于无定形二氧化硅含量的快速现场测量，该结果可用于筛选难以在中期固化的粘土。对于实践中的质量控制，强度刚度关系严重检查为使用非破坏性刚度探针评估强度的方法。密切观察表明，在现有研究中提出的单线表示广泛的固化时间和混合条件可能是误导性的。提出了对这种关系的新解释。

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