. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . .It is ground at the harbour works, for which purpose, and for mixing the mortar, there have beenerected four vertical double-roller mills and two sieves, driven by an engine of 20 horse-power. In the part of the pier which has been already executed, the stone facing under low waterbeing made to slip into the groove formed by the flanges of the iron piles, the outer flange is leftexposed to the action of the salt water, which no doubt will in the course of
. Spons' dictionary of engineering, civil, mechanical, military, and naval; with technical terms in French, German, Italian, and Spanish . .It is ground at the harbour works, for which purpose, and for mixing the mortar, there have beenerected four vertical double-roller mills and two sieves, driven by an engine of 20 horse-power. In the part of the pier which has been already executed, the stone facing under low waterbeing made to slip into the groove formed by the flanges of the iron piles, the outer flange is leftexposed to the action of the salt water, which no doubt will in the course of time exert an injuriouseffect upon the iron, Figs. 3878 and 3881. To remedy this, it is intended in the remainder of thework to reverse this plan, and to make the grooves in the stone facing, into which the outer ironpiling will fit, Figs. 3876 and 3879. The stone blocks will therefore overlap the iron piles, andform a continuous stone facing, so that no part of the iron will be exposed to the action of the saltwater. The grooves will be filled from the top with cement, which will enclose the iron flange,and effectually preserve The concrete employed is formed of Arden hydraulic lime, iron-mine dust, sand, gravel, andstone chips—the lime and the mine dust being well ground, under edge stone mills, before beingmixed with the other materials. The proportions are by measure—1 part of ground lime, half apart of mine dust, 1 part of sand, and 3 parts of gravel and stone chips. Immediately afterbeing mixed, and when brought to a proper consistency with water, it is conveyed to where it is tobe used, is let down under water in the discharging boxes, and in a short time sets very boxes used are either of iron or of wood, and contain 1 cub. yd. each. Those of iron arefound to be preferable, as the buoyancy of the wooden ones renders them somewhat unmanageablein a tideway, after their contents have been discharged. This mode of constructing walls in deep water without c
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Keywords: ., bookcentury1800, bookdecade1870, bookidsp, booksubjectengineering
