AS 1012.8.3:2015 pdf free

AS 1012.8.3:2015 pdf free.Methods of testing concrete
The procedure for the moulding of specimens shall be as follows:
(a) Thinly coat the inside surface of moulds, base plates and covers with a concrete release agent to prevent adhesion of the concrete. Mould base plates and covers other than steel may not require oiling， depending on the material used in their construction.
(b) Take the sample of grout or mortar as quickly as possible to the place selected for moulding the specimens.
(c) After mixing the test sample to offset any segregation that has occurred during transportation, commence casting without delay.
(d) Place grout or mortar in the mould in approximately two equal layers using a scoop ensuring symmetrical distribution of the grout or mortar within the mould.
(e) Compact the grout or mortar without causing segregation or excessive laitance as follows:
(i) Grout Tap the mould with the mallet until no air bubbles are seen to rise and the grout is level. The corners of the mould shall be completely filled. Less tapping may be required where the grout is more fluid. Repeat the process for the second layer, slightly overfilling the mould.
(ii) Mortar Rod the entire surface of the mould with firm even pressure with the tamping rod, sufficient to produce even consolidation without segregation.Avoid striking through the mortar as this can leave holes behind after filling the second layer. The number of strokes per layer, required to produce full compaction will vary according to the mortar or mixed material type. At the conclusion of the tamping, lift and drop the mould through a height of 10 mm 5 times to force any remaining air bubbles out. Repeat the process for the second layer, slightly overfilling the mould.
Each specimen shall be identified by the mould marking or by other means that will not adversely affect the strength of the concrete. Scratch markings shall not be used. As each specimen is removed from its mould in accordance with the provisions of Clause 10, it shall be identified by marking with a suitable indelible marking medium.AS 1012.8.3 pdf free download.