Water and Alternative Materials
Recycled and alternative materials are finding increased use in the construction of road pavements and embankments. Environmental concerns are leading to constraints on quarrying of the materials that have, conventionally, been used while tax incentives and legislative limitations are encouraging the uptake of wastes, by-products and recycled elements in their place. These materials do not, necessarily, behave in the same manner in the presence of water as many conventional materials do. Self-cementation due to pozzolanic activity may help to stabilise some, others may exhibit undesirable leaching, yet others may have much higher permeability than the material they replace...
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