Reinstatement of slopes: report on discussion

With reference to paper 2.1, it was noted that in his presentation Or Murray referred to the use of quicklime when reinstating the slope with Netlon reinforcement mesh. As quicklime or hydrated lime is very corrosive and yet commonly used in building sites and road sites, Or Murray was asked whether any research has been carried out into this topic and whether any adverse effects were

noted where the mesh and quicklime were in contact.

It was confirmed that no research is being carried out at TRRL into the corrosivity of quicklime. As described in the paper, the quicklime was employed to improve the properties of the London Clay such that the construction plant could operate effectively, particularly after wet weather. No adverse effects were noted to the exposed mesh in direct contact with the quicklime and as the inclinometer measurements through the reinstated slope showed no movements subsequent to completion, it is reasonable to suppose that the mesh at deeper levels was unaffected.