CEPCO PHC Piles are manufactured to generally comply with the requirements of:-
|MS 1314:Part 4:2004||Precast Pretensioned Spun Concrete Piles (Class A, B and C)|
|JIS A 5373||Precast Prestressed Concrete Products|
|BS 8110:1997||Structure Use of Concrete|
|BS 8004:2015||Code of Practice for Foundations|
|BS EN 1992-1-1:2004+A1:2014||Eurocode 2: Design of Concrete Structures. General Rules and Rules for Buildings|
|MS EN 1992-1-1:2010||Eurocode 2: Design of Concrete Structures - Part 1-1: General Rules and Rules for Buildings|
|MS EN 1992-1-1:2010 (National Annex)||Malaysia National Annex to Eurocode 2: Design of Concrete Structures – Part 1-1: General Rules and Rules for Buildings.|
|SS EN 206:2014||Concrete - Specification, Performance, Production and Conformity|
Cement Predominantly ordinary Portland cement (OPC) is used conforming to the requirements of MS EN 197-1:2014 although some projects may require other types of cement to be used.
AggregatesCoarse aggregates shall be clean granite crushed stone not exceeding 20mm in size conforming to MS EN 12620:2010. Fine aggregates shall be clean river sand or washed mining sand averaging 5mm in size.
AdditivesHigh range water reducing agent meeting any of the requirements of JIS A 6204, ASTM C494 Type F, BS EN 480-1:2014, BS EN 1008:2002 or equivalent.
Prestressing SteelHigh frequency induction heat prestressing steel bars conforming to JIS G 3137:2008, or equivalent.
Spiral WireHard drawn wire conforming to MS 144: 2014, BS EN 10025:2004 or equivalent.
The minimum concrete cube strength at
a) Transfer of prestress 30 N/mm²
b) 28 days 80 N/mm²
With the high concrete compressive strength of 80 N/mm² being achieved, the overall structural strength of the spun piles is also enhanced in terms of the allowable axial bearing capacity, the tensile capacity and also the bending capacity.
The durability of the spun piles is further improved in particular with respect to resistance to corrosion and sulphate attack due to improved reduction in the permeability of the concrete.
All spun piles will be supplied with steel end-plated for jointing / splicing. When two lengths of the spun pile are joined by welding along their entire periphery, the bending strength of the completed joint has been so designed to have at least the same structural characteristics as the pile body.
Lifting points for the piles will be marked on all the spun piles of 12m and above. The lifting of the piles is generally carried out by wire ropes at the specified lifting positions or by any approved hook mechanism at both ends.
All CEPCO spun piles shall carry the following markings like company logo, trademark, name, Malaysia Standard reference of pile size and class, date of cast, serial number and factory code, pile length and type.
The delivery of preliminary test piles for installation can normally be arranged at a very short notice.
Semi-circular steel moulds which have been thoroughly cleaned, are then fed with concrete up to the required volume. Thereafter, they are properly locked, subjected to prestressing and then to a designed centrifugal compaction process by spinning. They are then transferred to steam curing chambers where steam is being supplied for curing in order to achieve the necessary transfer strength for demoulding purpose. After the curing is completed, the spun piles are then demoulded for the checking of defects while the steel moulds are then re-cycled back into the manufacturing flow sequence for the next concreting.