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- W3131277551 abstract "In mechanised tunnelling, the filling of the annular gap behind the precast concrete segments is one of the essential operations. The main goal of filling this space is to reduce surface settlements and limit movements due to tunnel excavation in the soil mass. To achieve this aim, a two-component grout is often used to fill the annular gap. Determination of the amounts of ingredients in the two-component grout should be carried out in such a way that the injection materials will be able to fulfil the required performance and technical properties. In this study, laboratory tests were carried out to investigate two-component grout properties, such as flowability, bleeding, gelling time and uniaxial compressive strength. The effect of lateral pressure on grout resistance was studied according to real excavation situations. The influences of the grout ingredients and effective parameters such as bentonite and cement contents, water–cement ratio and the dosage of accelerator (sodium silicate) and accelerator ratio were also investigated." @default.
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- W3131277551 date "2022-12-01" @default.
- W3131277551 modified "2023-10-18" @default.
- W3131277551 title "Experimental study of the mechanical properties of two-component backfilling grout" @default.
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- W3131277551 doi "https://doi.org/10.1680/jgrim.20.00037" @default.
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