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- W577378323 abstract "The top 315mm of a Northampton Road subgrade has been transformed into a capping layer conforming to government specification by mixing 3% quicklime into soft in situ clay. The required fifteen-fold increase in CBR values was achieved in less than seven days and the lime will continue to strengthen the clay for several months. Although North America and Europe currently stabilise clay and subgrades with lime as a matter of course, for some reason the method has never been popular in Britain. Provided the clay was treated to a depth of 350mm, the type I sub-base could be reduced from 430mm to 150mm due to the stabilised clay forming the capping layer. Once the contractor had removed the topsoil and excavated to formation level, stabilisation of the 2.5km long 7.3M wide formation was completed in 12 days. Details are given of the lime spreading operation and the mixing process performed by a self-propelled fully hydraulic Bomag MPH 100 pulverising machine specially designed for stabilising operations. A brief explanation of the chemical/physical principles behind the process is included. Amongst the conclusions listed are: that it is worthwhile testing the soil acidity before lime quantities are established; and the formation is probably sufficiently strong after its second pulverization to allow immediate placing of the sub-base. The environment benefitted greatly by utilising local material and so reducing the amount of haulage traffic. (TRRL)" @default.
- W577378323 created "2016-06-24" @default.
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- W577378323 date "1982-09-23" @default.
- W577378323 modified "2023-09-24" @default.
- W577378323 title "LIME MIX STABILISES SUBGRADE" @default.
- W577378323 hasPublicationYear "1982" @default.
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