Coarse Aggregate change
Coarse Aggregate change
(OP)
Hi everyone,
Is there any problem can be developed, if during concrete tank construction, the coarse aggregate type has been changed in the wall design mix to a diffrent type other than the one used in the tank's slab.
Is there any problem can be developed, if during concrete tank construction, the coarse aggregate type has been changed in the wall design mix to a diffrent type other than the one used in the tank's slab.





RE: Coarse Aggregate change
RE: Coarse Aggregate change
RE: Coarse Aggregate change
RE: Coarse Aggregate change
Each concrete mix would have its own characteristics. We do not know, from the original post, what the difference of aggregate is - other than it is likely from a different source. The gradation (say nominal or maximum aggregate size) difference between the two is not known. One would presume that each of the aggregates has a history locally of being used successfully in concrete. So, unless the source is a new one with no history, one would presume that considerations of alkali reaction or other detrimental effects would not be of concern.
In a concrete tank one would presume that permeability would be of an utmost concern. You would want a "tighter" mix for a concrete tank holding liquid. This would be a matter to consider in approving the concrete mix design. If the wall has been poured with an unapproved mix design, then I would say you have certain problems (potential) that must be addressed by the design and construction players - both from a technical and contractual point of view.
RE: Coarse Aggregate change
Also, you may need to consider the potential change in other characteristics of the mix as well, like shrinkage, freeze thaw durability, compressive strength, etc. All these properties can be affected by chaging the aggregate type. Remember that the aggragates (coarse and fine) makes the bulk of the mix, so their characteristics must be evaluated carefully.
RE: Coarse Aggregate change