construction site

Site Tests

There are quite a lot of site tests to be conducted on construction site before, during and after the execution of a construction project. Most of these site tests are to be carried out by the laboratory staff, however, in some cases, some of these tests are to be looked after by the supervisory staff on the job site. This chapter only introduces the scope of work of a site test and describes the preparatory works to be handled by the staff on site. In view of the calculation of the test result, it should be left to the independent laboratory staff to determine.

Site test is used to determine the acceptance of a material or a semi-finished product or the site condition at some specified stage of works before further work is allowed to proceed, or optionally as required by the Engineer in case of query. The individual or collection of acceptable test results does not define the final acceptance of the work but could be used to support the interim performance at various stages. The site staff should bear in mind to clean the testing apparatus after each use, to store and maintain in good condition and to carry out periodical calibration.

A ) For Concrete Works
– Sampling of Trial Mix ( at Batching Plant )
– Sampling of Aggregates ( at stockpile )
– Sampling of Reinforcement
– Speedy Test ( for moisture content )
– Slump Test ( for workability of concrete )
– Compacting Factor Test ( for self compaction of concrete )
– Temperature Test ( for green concrete )
– Compression Test ( for Compression Test )
– Sand Patch Test ( for surface texture of rigid pavement )
– Rolling Edge Test ( for surface profile of rigid or flexible pavement )
– Test Cores ( for hardened concrete / asphalt concrete )
– Cover Metre Test ( for reinforced concrete structure )
– Schimdt Hammer Test ( for structural concrete )

B ) For Steelwork
– Torque Test
– Pull Out Test ( for cast-in sockets of anchorage system )
– Paint Thickness Test
– Radiographic Test ( for welding )
– Ultrasonic Test ( for welding )
– Magnetic Particle Inspection ( MPI )

C ) For Water Leakage
– Soil Permeability Tests
– Dye Test
– Ponding Test ( for service reservoir / penstock )

D ) For Piling work
– Kentledge Pile Loading Test

E ) For Drainage works
– Air Test ( for gravity pipeline )
– Water Test ( for gravity pipeline )
– Infiltration Test ( for sewage drainage system )
– Pigging
– Closed Circuit Television ( CCTV )

F ) For Marine works
– Sand Content Test ( for seabed material )
– Bar Check Test ( for Echo Sounder )

G ) For Earthworks
– GEO Probe Test ( Drop Hammer Test )
– Proctor Test ( to determine the max dry density and optimum moisture content )
– Sand Replacement Test ( to determine compacted soil condition )
– California Bearing Ratio ( CBR ) Test
– Compaction by Roller ( product spec )