. A practical treatise on natural and artificial concrete; its varieties and constructive adaptations . e the size of thebroken granite (being exactly the natural size) now used inmaking the Victoria stone. Fig. 1 on Frontispiece showsa section of Victoria stone, nine years old (also the exactnatural size), when much larger pieces were used. Sincethat time the advantage of small-sized aggregates has beenfully recognized, and is now adopted in all cases, whateverthe character of the manufacture, and whether it is requiredfor simple paving slabs, or the most ornate mouldings as aidsto architectu
. A practical treatise on natural and artificial concrete; its varieties and constructive adaptations . e the size of thebroken granite (being exactly the natural size) now used inmaking the Victoria stone. Fig. 1 on Frontispiece showsa section of Victoria stone, nine years old (also the exactnatural size), when much larger pieces were used. Sincethat time the advantage of small-sized aggregates has beenfully recognized, and is now adopted in all cases, whateverthe character of the manufacture, and whether it is requiredfor simple paving slabs, or the most ornate mouldings as aidsto architectural embellishment. Fig. 2 on Frontispiece shows a piece of Victoria stone,six years old, which exhibits smaller aggregates than thoseof Fig. 1. Pavements have been laid with slabs made accordingto both systems, one of which, of the quality of Fig. 1, maybe seen at Piccadilly, near Devonshire House, and the other,of the mixture of Plate 2, in Holborn, between the FireBrigade Station and Chancery Lane on the same side of thestreet. BRIQUETTE SECTION OF PATEiNT V:iCTORlA STONE AND AS AT PRESENT MADE WITH FINE GRANITE THREE MONTHS VALUE 740 LBS PER SQUARE INCH. ENGLISH CONCRETE INDUSTRIES. 215 The above references to works of easy inspection are givenfor the purpose of affording those desirous of information onthe subject an opportunity of personal examination. A considerable mileage of paving has been laid in Londonas well as in other parts of the country. Having secured the preparation of the aggregate, the nextingredient required is all-important, and no precaution isneglected to secure its being of undoubted excellence. The Portland cement is at present obtained from theMedway or Thames, and when possible weighs upwards of112 lb. per imperial bushel. Under existing circumstancesthe fineness of the cement is not equal to the requirements ofthe Victoria Stone Works, and to bring it up to the wished-for condition it is put through a sieve so as to
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1879
