Tilted steel mould being cleaned
line plan for the development of
20-acre site at Jalan Pekililing by the erection of 3,008 units in seven 17-storey blocks and four four-storey blocks of shops and flats using precast techniques.
Resume Concrete aggregates and
cement
CONCRETE MIX PROPERTIES
1: 2.2: 3.5
lb/cu.yd.
Concrete
w/c = 0.50 lb/ton Concrete
Tasek rapid
560
319
hardening
cement
Sand
1,200
Granite
1,900
684
1,083
Water
270
Total
3,930
154
2,240
UNIT WEIGHTS
Concrete
1.75 ton/cu.yd.
Granite
1.1 ton/cu.yd.
Sand
1.0 ton/cu.yd.
Cement
94 lb./cu.ft.
SLUMP OF CONCRETE
lin. minimum to 2in. maximum
QUALITY CONTROL
Six 6in. test cubes are made daily from random batches. Compressive 28 days strength of test tubes is generally between 4,450 p.s.i. and 4,700 p.s.i. with 'standard deviation' approximately 120 p.si. Specified works cube strength after 28 days is 4,500 p.s.i. Sand is checked for moisture content in the morning and in the afternoon, determining required adjustments to the above average water dosage (corresponding to approximately 5 weight per cent moisture in sand). This test is carried out with a Gammon-Mor- gan flask.
Placing reinforcement for a facade element
Five European system-builders, in joint ventures with local companies, were invited to tender for the scheme and the contract was awarded in July 1966 to a consortium of the Danish firm, Larsen and Nielsen Consultor A/S, and Gammon South East Asia Berhad.
Structural and mould designs and a factory layout were prepared at the Copenhagen headquarters of Larsen and Nielsen, while preparation and piling work was put in hand simul- taneously at both the factory site and the building site.
For the casting factory an area at Jalan Damansara, 10 miles from the building site, was selected. Land in this area was comparatively cheap. It had a direct connection by road with the building site and it was adjacent to a large granite quarry, making aggregate readily available.
About 120,000 cu. yd. of fill from the quarry was used to reclaim the fac- tory site. Piling began in August 1966. Column foundations and erection of prefabricated steel structures for the halls and stacking yard began in Octo- ber and the factory halls were under roof by December 1966.
During this period work was also started on the storage and office build- ing, water tower, batching plant, fac- tory floor with mould supports, rails for overhead cranes and the electrical installation.
The construction phase of the works ended and the installation of overhead cranes and the first moulds to arrive from Denmark began in Janu- ary 1967. Moulds for the facade and slab units were built in Europe but most of the moulds for wall panels were built in Malaysia. The first con-
crete panels for use in the four-storey blocks, were cast in May 1967.
The area/cost data for the factory and equipment was as follows: Production and
57,000 sq.ft.
repair
Stacking and loading Storage Workshops
51,000 sq.ft.
12,000 sq.ft.
25,000 sq.ft.
Total
145,000 sq.ft.
M$1.34 m
M$1.06 m
Construction Moulds
Ancillary equipment (transporters not included)
Total
M$0.50 m
M$2.9 m
Taking the running-in period as the time consumed from the casting of the first element to the stage when the factory attained a 100 per cent rate of production, this period amounted
Dumping concrete
dr
18
Far East BUILDER, January 1969.
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