1955-1956 — Page 53

Public Works Department Annual Report 工務司署年報 All AI Reviewed

206. In the case of aggregate testing a total of 882 tests were carried out. In addition to sieve analysis the crushing strength, density and organic impurities of aggregates were investigated.

207. A total of 599 extraction tests were made from bituminous materials for Government Quarries. Many tests were also carried out for bitumen, asphalt and tar to ensure that the standard was up to British Standards Specification.

208. Soil tests amounting to 324 were carried out on the physical and chemical properties of soil.

209. Some of the varied types of materials tested were timber, iron man-hole covers, wood wool blocks and slabs.

ROADS OFFICE

Chief Engineer, W. A. Johnson, A.M.I.Mun.E., A.R.I.C.S.

General

210. Demands on the sub-department continued to increase, and the lack of sufficient professional and technical staff made it impossible to carry out all the work which required attention.

211. The increase in work resulted from an unabated increase in traffic, both in weight and volume, the deterioration of the pre-war lightly constructed type of road and the inadequacy of carriageway and footpath widths. The attached graph shows how road lengths, numbers of vehicles licensed, population and output of crushed stone and bituminous materials from the Government Quarries have increased since 1920, and all these factors, directly or indirectly, are indicative of the demands upon the Roads Office and the alarming increase in those demands since 1946.

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206. In the case of aggregate testing a total of 882 tests were carried out. In addition to sieve analysis the crushing strength, density and organic impurities of aggregates were investigated. 207. A total of 599 extraction tests were made from bituminous materials for Government Quarries. Many tests were also carried out for bitumen, asphalt and tar to ensure that the standard was up to British Standards Specification. 208. Soil tests amounting to 324 were carried out on the physical and chemical properties of soil. 209. Some of the varied types of materials tested were timber, iron man-hole covers, wood wool blocks and slabs. ROADS OFFICE Chief Engineer, W. A. Johnson, A.M.I.Mun.E., A.R.I.C.S. General 210. Demands on the sub-department continued to increase, and the lack of sufficient professional and technical staff made it impossible to carry out all the work which required attention. 211. The increase in work resulted from an unabated increase in traffic, both in weight and volume, the deterioration of the pre-war lightly constructed type of road and the inadequacy of carriageway and footpath widths. The attached graph shows how road lengths, numbers of vehicles licensed, population and output of crushed stone and bituminous materials from the Government Quarries have increased since 1920, and all these factors, directly or indirectly, are indicative of the demands upon the Roads Office and the alarming increase in those demands since 1946. 43

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206. In the case of aggregate testing a total of 882 tests were carried out. In addition to sieve analysis the crushing strength, density and organic impurities of aggregates were investigated. 207. A total of 599 extraction tests were made from bituminous materials for Government Quarries. Many tests were also carried out for bitumen, asphalt and tar to ensure that the standard was up to British Standards Specification. 208. Soil tests amounting to 324 were carried out on the physical and chemical properties of soil. 209. Some of the varied types of materials tested were timber, iron man-hole covers, wood wool blocks and slabs. ROADS OFFICE Chief Engineer, W. A. Johnson, A.M.I. Mun. E., A.R.I.C.S. General 210. Demands on the sub-department continued to increase, and the lack of sufficient professional and technical staff made it impossible to carry out all the work which required attention. 211. The increase in work resulted from an unabated increase in traffic, both in weight and volume, the deterioration of the pre-war lightly constructed type of road and the inade- quacy of carriageway and footpath widths. The attached graph shows how road lengths, numbers of vehicles licensed, popula- tion and output of crushed stone and bituminous materials from the Government Quarries have increased since 1920, and all these factors, directly or indirectly, are indicative of the demands upon the Roads Office and the alarming increase in those demands since 1946. 43

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206. In the case of aggregate testing a total of 882 tests were carried out. In addition to sieve analysis the crushing strength, density and organic impurities of aggregates were investigated.

208. Soil tests amounting to 324 were carried out on the physical and chemical properties of soil.

209. Some of the varied types of materials tested were timber, iron man-hole covers, wood wool blocks and slabs.

ROADS OFFICE

Chief Engineer, W. A. Johnson, A.M.I. Mun. E., A.R.I.C.S.

General

210. Demands on the sub-department continued to increase, and the lack of sufficient professional and technical staff made it impossible to carry out all the work which required attention.

211. The increase in work resulted from an unabated increase in traffic, both in weight and volume, the deterioration of the pre-war lightly constructed type of road and the inade- quacy of carriageway and footpath widths. The attached graph shows how road lengths, numbers of vehicles licensed, popula- tion and output of crushed stone and bituminous materials from the Government Quarries have increased since 1920, and all these factors, directly or indirectly, are indicative of the demands upon the Roads Office and the alarming increase in those demands since 1946.

1955-1956 — Page 53

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