AS 3583.6:2018 pdf free download – Methods of test for supplementary cementitious materials
1 SCOPE
This Standard sets out the reference method for determining the relative water requirement and two methods, one the standard test and the other an accelerated test, for determining the strength index of fly ash and slag only. Both properties are determined by comparing results for a test sample mortar with results for a General Purpose cement mortar. The methods do not provide a basis for comparison between different types of supplementary cementitious materials because of the differing total binder volumes used with each. Also， since the performance of these materials is affected by interaction with the cement, the test results for a given sample are dependent upon the properties of the cement used. The results for relative water requirement and strength index should not be used to infer potential concrete performance. Relative water requirement and strength index for amorphous silica should be performed according to the appropriate method given in ASTM C1240 Standard Specification for Silica Fume Used in Cementitious Mixtures.
8.3 Test mortar
The procedure shall be as follows: .
(a) Mix the batch of mortar as described in AS 2350.12.
(b) Measure the flow of the mortar as described in AS 2701. If the flow is not within three units of the flow recorded for the control mortar, the mortar shall be discarded and a new batch prepared with an adjusted water content.
(c) Provided the flow is within three units of the figure recorded for the control mortar,record the mass of water used and the flow.
(d) Discard the mortar batch used to determine the flow.
8.4 Strength index specimens
The procedure shall be as follows: .
(a) Prepare, mix and cure each set of three specimens as described in AS/NZ 2350.11 and AS 2350.12, using the water contents determined in Clauses 8.2 and 8.3 above.
(b) Demould each set of specimens as described in AS/NZ 2350.11.
(c) For a standard test, cure the specimens in lime saturated water at 23 +2°C, as described in AS/NZ 2350.11, before testing at an age of 28 days (see Note 1). .
(d) For an accelerated test, after initial 24 h curing in the humidity cabinet, cure the specimens in lime saturated water at 23+2°C, as described in AS/NZS 2350.11 for 4 days+1 h. Remove and immerse the specimens in a water bath at 50+1°C for 46 h +0.5 h. Remove and condition the specimen in water at 23 +2°C for 2 h +0.25 h before testing at age seven days (see Note 2).
NOTES:
1 Caution should be exercised when attempting to correlate results between 28 day and 7 day (accelerated) results. Where possible, 28 day results should be used – they are more reliable.
2 Specimens from both the control mortar and the test mortar should be subjected to the same curing regime.