1933-09-23 — Page 2

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HONG KONG DAILY PRESS, SATURDAY, SEPTEMBER 23, 1933,

ENGINEERING AND

CONCRETE ROADS IN GREAT BRITAIN

Careful Experiment At Harmondsworth

new

varied prim

by 10

BUILDING

CANNING IN GREAT BRITAIN

EXTENSIONS OF THE INDUSTRY

In spits of the fact that many of the industries which consume large quantities of Tin have for the past three years been suffering from the effects of the slump, there are many signs of the re- Vival to which Tin producers may look for encouragement, particu- larly in the United Kingdom.

sure being the imports of Mala yan pineapple, which increased during that year by 30 per cent.

to 50,000 tons

RHODESIA PLANS TO USE VICTORIA FALLS

Plant Not To Despoil Natural Beauty Of Great Cataract

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Livingstone, N. Rhodesia. A company to submit all plans to the scheme to generate electricity in Government, and that no works Northern Rhodesia by water power

from the Victoria Falls, provided can be erected without the Gov- that the beauty of the falls them-ernment's sanction. The quantity selves shall in no way be impair of water that may be diverted at ed has been approved by the Gor- any one time will be limited, and a special" condition will operate ernment.

All through the discussions of when the flow of water drops be-- plans for the project the Northern low a certain quantity, a

The scheme as thus far disclosed Rhodesian Government has em- phasized the necessity, and indeed shows a generating station at, the the Government's determination," | Silent Pool, which is well away to preserve the beauty of the falls. from the lip of the Fall, and is

It is understood that the agree- | said not to intrude Into any view; requires the water-power from popular vantage points.

ment

HULUTAO

Dutch Plant To Be Moved To Macao

„SCOTTISH SHIPBUILDING

Very

The Union Steamship Company of New Zealand, Limited, have placed ** order with ........ Mesars..

and Alexander Stephen

Bons, We understand that, so far Two new cunning factories were

as | Limited, Linthouse, Glasgow, for a at Aintree, Chinese enterprise is concerned, no cargo steamier about 270 ft. in opened this month, near Liverpool, and one at West progress is likely to be made for a length. This order will be

work. Mesars. Stephen's yard is. Lynn, Norfolk. The former will considerable time in the develop welcome, as except for some repair pack 40 tons of peas daily this ment, of the port of Hulutso.

The Japanese have made this-itu-empty-Engineering. season, as well as beet, small car rots and asparagus. The co-opera-possible, so much so that all the tion of farmers in the district has paraphernalia accumulated there by been so pronounced that 250 acres the Dutch Company for Port Works. of peas have been grown on land is being transferred by the China in Macao, where the work of har previously allocated to unproit- Navigation Co.'s vessels the bour improvement is being indus able potatoes and cabbages. Em-south, The plant is to be delivered triously and necessarily pursued. ployment has been found for an additional 400 people...

London-Although concrete has sections. Of these, two were laid been used for many decades with in, reinforced concrete-slabe, as a foundation for a wood or the reinforcement being the one wee

The people of the United King asphalt pavemeist, its employ tion at both top and bottom, and ment for road construction within the other, at the top only. In the dom last year consumed 190,000 t such a protective carpet is other four malu beetions, the slabs tons of canned fruit. Although in England and Scotland the number elatively novel. It was tried in were 8-in" thick. The concrete was

and Chester in 1912, and the concrete in one section, wilbout reinforce of factories canning fruit

during the Tilbury Dock road dates from 1917, ment; in another it was it the top vegetables Increased

the bottom year from 59 to 72, the imports of and has given good service. It is, only; in a third at

canned fruit reached the record however, America which has taken only; whilst in the fourth section, the lead in this system of road con- the concrete had both top and bot-gure of 180,000 tons to the vulne at £6,000,000, the most remarkable struction. Thus, whilst by the end tom reinforcement. The founda- of 1831 some 1,500 miles of concrete tion throughout consisted of a 3-in, roadway had been constructed in layer of clinker, but for the pur this country, this aggregate was poses of the research, in each main hardly one-sixth of the American section of 8-in stabs, a number mileage-laid down in a single year. were selected for determining the The system being novel, there has effect of thoroughly saturating the been much to learn as to, the value clinker bed before depositing the of different methods of laying, the concrete; of protecting it, in an slabs, of preparing the concrete, other case, by a sheet of waterproof and of the advantages of reinforce paper, so as to prevent it absorbing meat. To secure definite date on water from the concrete; whilst in these heads, the Roads Department third case, the clinker was kept of the Ministry of Transport de dry, but unprotected, so that it was rided, some years ago, to lay out an possible for it to rob the newly de- experimental read at Harmonda posited concrete of part of its content. The experiment worth as a loop to the Colnbrook water ty-pass. This had the advantage was" further that traffic could be excluded from each instances, arranging, that one-

The site of the West Lynn fac concrete should tary covers 10 acres and an output or admitted to the road at will. third of the

dry Provision was also made for a care be deposited as

Wi of several million cans -a year. of ful study of the behaviour of the consistent with reasonable work-fruit and vegetables is anticipat concrete on .the

ed. Chertsey ability, in another third, the con- arterial road, the Hampton Court-crete was so wet that it would bare- Esher road, and the Leatherheady keep its camber when laid, case the by-pass. The results of this inquiry whilst in the remaining from the subject of a report re- mixture was of "medium" wetness.

Problem of Cracks. cently published by the Ministry of! Transport:

The temperature differences were The points specially studied on mainly responsible for the cracks, the Chertsey and the Hampton which occurred predominantly dur Court Esher roads were the relative ing the warmer half of the year.

Messrs. Merryweather and Sons, merits of different forms of joints In winter few new cracks appear- between successive slabs, Twelve ed, but it was during this season Limited, Greenwich-road, London, different types were tried, includ-that the most careful maintenance S.E.10; have just received another ing a simple but joint filled in with was required, since the contraction order from the London County, cellular rubber packing, tongued due to cooling enused the cracks to Council for two "dual purpose” en- Great care was taken to gines, Le., motor pumps arranged snd-grooved joints, rabbeted joints, open,

to carry fire escapes. This con- bracket joints, and sleeper jointa. keep both cracks and joints - as The traffic over these roads has not watertight as possible. During 1932 tract, with four motor escape vans Fet been heavy, so that definite con- many of the joints between the recently ordered, makes a total of clusions as to relative value would reinforced. occrete Alabs gave trou-six new machines now under con- he premature, but on the Chertsey bla. They were filled with bit struction by the firm for the Lon- road the deflection was least with men, but this soon disappeared, don Fire Brigade. the sleeper joints and the simple sinking into the foundation. butt joint is definitely condemned. remedy was found by packing the joint with oakum before applying the bitumen. In the three years covered in the report a total of 35 cracks were recorded, of which 158 made their appearance during the some 12,000 first twelve months and 200 within vehicles to 13,000 vehicles passing the first two years. Top reinforce and will have a gross tonnage of over it per bay. The whole road-ment appeared to retard cracking 170, while the engines will have an way was divided up, for the pur during the first year, but by the end th.p. of 600. They will have a pose of the research, into six main of the third year slabs thus rein- length, between perpendiculars, of forced had about as many cracks 93 ft., & breadth moulded, of 26 as unreinforced ́ ́eancrete. Bottom ft, and a depth, moulded, of 13 reinforcement proved better, but, ft. 8 in..

Harmandsworth Experiment.

The Harmondsworth experimental road has been open to traffic for

over

three years,

For Constructural Work of Every

Description

Use Green Island Cement

•

TWO REFLEX TYPE ROTARY KILNS HAVING AN OVER ALL

LENGTH

OF 254 FEET. THESE KILNS ARE USED TO

MANUFACTURE GREEN ISLAND CEMENT.

Issued by the

GREEN ISLAND CEMENT CO., LTD.

2ND FLOOR

EXCHANGE BUILDING

A

ENGINEERING CONTRACTS

PLACED WITH BRITISH FIRMS

Messrs. Cammell Laird and Com- pany. Limited, Birkenhead, have received an order from the Lon- don, Midland and Scottish Rail- way Company, for two steam tuga- for service at Barrow Harbour and Docks. The new vessels are to re- place the Cartmel and the Furness,

con-

the double reinforcement was best. Mesars. Lodge-Cottrell, Limited, The bottom reinforced 8-in, alabs 47-51; King William-street, Lon- cracked more than the unreinforced don, E.C.4. have secured i 8-in. slabs. The experiments made tract from Messrs. Tata Iron and with thewes," "medium," and Steel Company, Limited, India, for "dry" coneratex showed that where a large blast-furnace gas-cleaning the foundation layer could pick up plant. This will be an electrosta- moisture, a "wet" mix had advantic plant of the two-stage nine- tages, but with the waterproof cleaning type, similar to that now. foundation the "dry" concrete showed up, best."Engineering.."

OIL POLLUTION IN SEA

WATERS

was stated at the annual meeting of the South Wales Sea Fisheries Committee, held at Ten- by, that further correspondence | had been received complaining of of pollution on the coast, and ask- ing what steps could be taken in the matter. The Fishery Omcer, Lieutenant-Commander E. Kirk- patrick-Crockett, RN, said a copy of the correspondence would be sent to Bir Cooper. Rawson, M.P. and Mr. D. R. Grenfell, M.P. who were interested in the promotion of a Eur to require the Installation of oil separators in ships. Any form of oil pollution was harmful to crab and lobsters, and the ques- tion covered the whole fishing in- dustry.—Engineering,

BOILER DRUMS FOR FUL HAM POWER STATION One of the 18 solid forged steel boller drums which the English Steel Corporation, Limited, Vickers Works, Shemeld, are making för the Stirling boilers to be installed in the new Fulham power station was dispatched from Vickers' works on July 1 We are informa- ed that these, drums, which have an internal diameter of 54 in, and a length of 40 ft 9 in are among the lariteat ever made in this country; the weight of each is 12 tons. The drum has been torged in one piece, with Integral closed by the EH.C. procent“ corporation we undi

is also

making both

power stati

Bratzes.

being installed by the company for the South African Kión and Steel Industrial Corporation, and for Messrs. Stewarts and Lloyd's new plant at Corby: The gas volume is 11,000,000 cub. ft. per hour, the dust content of which is 16 grains per cuble foot, and the guaranteed performance is that the dust con- tent of the cleaned gas shall not exceed 0-0088 grains per cub. It

Engineering.

Shanks

& CO LTD

BARRHEAD-SCOTLAND

to

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