i want know to calculate the bleeding rate for any mix design.
1) with only cement =307 kg/m3 2) with cement and flyash =210+95 kg/m3
Aggregate ratio FA/CA=0.6 and FA/ total Agg.=0.38
three cement having C3A8%
Is there any mix design following above parameters from which i can get good data to measure bleed rate evaluation for my project?
Hi Bhupesh, You pretty much need to separate the bleed water and measure its mass over time to calculate the bleed rate. You also need to account for any evaporation during these measurements. Please read more in this article: https://link.springer.com/article/10.1007/BF02480511
Water is having lower specific gravity as compared to other ingredients of concrete and hence tends to rise at top due to capillary rise, Water cement ratio is main factor that will decide rate of bleeding. Other factors are proportion of Coarse aggregates to fine aggregates, use of additives like flyash, admixtures etc.Bleeding can be expressed quantitatively as total settlement of concrete per unit height of concrete ( thickness). Bleeding can also be measured as percentage of mixing water . bleeding can be found out experimentally. The standard test method for bleeding of concrete is given in ASTM C 232-09. Bleeding may be up to 20 % in worst case. Sometimes rising water may get entrapped underside of aggregates or reinforcements which will also affect bleeding rate.
Initially Bleeding rate remains higher ( linear) but decreases with time .
You can use this test procedure:
AS 1012.6 (1999) Methods of testing concrete Method 6 : Method for the determination of bleeding of concrete. Sydney, Australia https://infostore.saiglobal.com/store/PreviewDoc.aspx?saleItemID=2775278
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