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Rock fill. Introduction. Processing of fragmented rock to produce rock fill is relatively simple comprising breakage of oversize and sizing or grading of the material using grids and screens. Crushing of rock should not be necessary to meet the specification but may be carried out to reduce blasted rock to a size suitable for other construction uses within the same project, for example, road sub-base.
Secondary breaking.Oversize blocks of stone produced by quarry blasting may be sorted as armourstone by the face excavator or set aside for secondary breakage. In highway cuttings, oversize blocks may be used for landscaping purposes but would normally be set aside for secondary breakage. In most cases, however, the design of the blast should provide material substantially within the grading specified without the need for further breakage. In most cases, however, the design of the blast should
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This 250-word extract was created in the absence of an abstract.
