The Influence of Aggregate Size and Binder Material on the Properties of Pervious Concrete

Table 5

Chemical composition of phosphoric acid.

Item	Phosphoric acid
Test item	Test results
Chloride (Cl)	Max. 0.001%
Nitrate (NO3)	To pass test
Sulfate (SO4)	Max. 0.006%
Alkali and other phosphates (sulfate)	To pass test
Substances reducing KMnO4	To pass test
Heavy metals (As and Pb)	Max. 0.001%
Iron (Fe)	Max. 0.005%
Arsenic (As)	Max. 0.0003%
Specific gravity	1.700–1.710
Assay	Max. 85.0%