. Construction materials for coastal structures. Coastal engineering; Building materials. Figure 5. Power shovel loading trucks at Catalina Quarry. materials in a loosened state. This requires heavy blasting or extensive reworking with a dozer. In all cases, the type of equipment, the capacity, the general handling procedures, and rates of excavations should be docu- mented and the effect of the overall operation on the material gradation evaluated. This is generally done by observing the operation, then sampling and determining the gradation of the material from the muck pile before excavatio
. Construction materials for coastal structures. Coastal engineering; Building materials. Figure 5. Power shovel loading trucks at Catalina Quarry. materials in a loosened state. This requires heavy blasting or extensive reworking with a dozer. In all cases, the type of equipment, the capacity, the general handling procedures, and rates of excavations should be docu- mented and the effect of the overall operation on the material gradation evaluated. This is generally done by observing the operation, then sampling and determining the gradation of the material from the muck pile before excavation and after handling by the equipment. The basic methods of transporting the stone materials are by scrapers, trucks, and belt conveyors. The type of truck generally has little in- fluence on the properties or processing of the embankment'material. In recent years, there has been a dramatic increase in the use of conveyor belts, due partly to improvements in belting materials and designs which permit the conveyors to be moved more rapidly. Clearly, lack of mobility is a serious limitation. It is also important to consider carefully the size and gradation of the stone products and the elevation changes required for transport. Most conveyors are easily damaged by large stones, and special designs are required in steep topography. It is not common on construction projects to require cutting and splitting of dimension stone. When such products are required (usually for facing of completed structures), it is customary to purchase these products, as would be done for any other manufactured product. Only a very limited number of sites are suitable for producing dimension stone, and their production requires equipment and skills that are not ordinarily readily available. 39. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original
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