...R STRUTHERS; J W LOVATT CONSTRUCTION HEAVY DUTY CONCRETE RUNWAYS MATERIALS PLANT SPECIFICATIONS MIX PROPORTIONS AGGREGATES EXCAVATING CHALK EXCAVATIONS TRACTORS SCRAPERS BULLDOZERS ANGLEDOZERS DRAINAGE CONCRETING TESTING CONTROL PLACING VIBRATIONS EXPANSION JOINTS...

...W BARNES © Thomas Telford and ICE 1941 DUGALD CLERK LECTURE METHODS EXCAVATING WORKS EXCAVATIONS OVERSEAS MACHINERY PLANT EXCAVATORS GRABS DREDGERS EQUIPMENT TRACTORS SCRAPERS SHOVELS CANALS BARRAGES CONSTRUCTION IRON ORES MINES MINING OPEN CAST IRONSTONE COPPER...

... that thewater-bound macadam, though sealed with cold emulsion, did not stand up to traffic for any length of timeand a considerable amount of repair workwas constantly involved. Wherevepr ossible, the excavation was carried out by means of mechanical tractor-drawn scrapers of the LeTourneautype,mainly of 8...