Curing concrete w/o lime water

[TDC84]

Hi,

So I've got some samples that were cured in tap water without any lime added. It was noted that there was a film on top of the water after a couple days. I take it this was lime that leached out? How useful will the break data be?

 

[dBasement]

It depends. If it is strictly information or for QC, then it should be fine, if it is for QA purposes, potential litigation or comparison testing, then the results can't be used. Tank temperature is more important. Was the temperature of the water monitored?

 

[TDC84]

It's for QC.

The water temperature has been 70-75 F the whole time so far.

 

[bb29510]

specification are guideline so everybody test the same way, portable water, so its clean, instead of using sewer water. the lime to keep the concrete from leaching out but after couple days and couple cycles of cylinder, there usually enough lime in the water. The question is, are the cylinder breaking good. if its comes down that your lime water is causing the samples to break low, you got other problem. keep from freezing, keep from cooking, stay iniform

ICC Master Special Inspector, Structural Masonry, Reinforced Concrete, Soils, Structural Bolted Joints, Structural Welding, AWS CWI D1.1

 

[Ron]

You are not likely to make the cylinders break higher than they should, so if the strength is OK, the storage did not compromise them. Lime in the water is to reduce the extraction of lime from the specimens...relatively minor point, but part of the standard procedure.