Author: Clarke, J P
First published: N/A
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Clarke, J P
Concrete Machinery and Concrete construction are well represented in the "Winget" exhibits on the stand of their agents for South Wales, Messrs. Charles D. Phillips, Ltd. of Newport. Three models are included of the new open drum mixer with the Burn-Lancaster Papent Drum, a machine which is stated to have created a revolution in the concrete mixing world, and to have produced a perfect mix in record time.
We have already seen that in dealing with rectangular slabs, supported upon four edges
and reinforced in two directions at right angles to each other, the allowance to be made for determining the bending movements in the respective directions is difficult of exact determination; but that it is quite easy to apply certain approximate formulae which different authorities have advanced.
Ewart S. Andrews
The accompanying photograph is of a reinforced-concrete bridge, carrying the roadway over the River Alde, and is part of a scheme prepared by the County Surveyor, Mr. W. Jervis. The superstructure above the normal water level is in Portland Cement, and the whole structure is carried on twenty Ciment Fondu piles. A rather interesting feature of this bridge is the construction of the 4/13 ft. counterfooted walls; these are properly bonded into, and are part of, the bridge; in fact, the piers seen at the corners are really part and parcel of these walls. The walls at their outer ends are free, and can slide on the pile heads, a bituminous pad being placed between the pile cap and the underside of the wall base to allow for free movement. The wall is prevented from sliding outward from the roadway by being keyed into the inner pile cap.