Concrete cover to the steel bars inside a concrete pour is critical to the durability of reinforcement for the structure. Once the Engineer is in doubt, it may require to conduct a Cover Metre Test to verify the as-cast concrete cover to the reinforcement to see whether the condition is acceptable. During casting, the concrete …
Prior to the placing of concrete in its final position, although there are always some site tests conducted to verify the consistency of the material, however, the degree of final compaction is still uncertain. Visual inspection on the deployment of exterior or internal vibrators or the paving machine may help to justify the degree of …
This is a test conducted on-site to determine the surface profile and the cross-fall of the as-cast concrete pavement and is conducted by the laboratory staff. Normally, the acceptance of the surface profile is to be determined by the survey results and the respective sections. However, in case there are some local areas that are …
This is a site test to determine the surface texture of concrete pavement and is conducted by the laboratory staff. Most of the concrete pavement ( if without specified surface finishes ) requires a surface texture to provide non-skid resistance to pedestrians or traffic. This surface texture is usually formed with the use of a …
Sampling of reinforcement is always conducted by the site supervisor who should also get the copy of mill certificate and letter of origin of the sampled batch of steel bars available at time of submission for tests. The frequency and number of samples to be taken may vary at different contract stages and with different …
The fine and coarse aggregates stored at the stockpile or batching plant should be periodically sampled for sieve analysis, ie the Grading Test, before bringing up to the overhead hoppers for batching purpose. When the aggregates are delivered to the stockpile on site, it usually causes segregation during unloading, no matter whether by conveyor belt …
This process is usually conducted at the approved batching plant. When the trial mix of concrete ( with a nominal load ) produced from the batching plant is sufficiently mixed inside the mixer or the drum of a concrete truck, the mix is then discharged with a chute for testing. 3 separate increments should be …
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 …
Waterproofing structures may be required to test for watertightness after completion of work . The test is to apply static pressure by means of ponding water on the internal face and no head of water on the external face . Testing period may vary from 24 hours to 3 days as required by the Specification …
Kentledge testing involves the use of dead weights as a reaction system. For bored, cast-in-situ piles where anchor piles cannot be installed, the use of a kentledge reaction system can be an appropriate testing solution. Also, where insufficient friction capacity may be available to allow the use of tension piles, the kentledge system is commonly …
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