... , also called silica fume or micro silica, is a byproduct of producing silicon metal or ferrosilicon alloys. Silicon metal and ... extremely strong surface active.Microsilica can be used in a variety of cementation products, such as concrete, grouts, and ... attack from chlorides, acids, nitrates and sulfates.3. Specification of Microsilica JH85 ParametersStandard ValueSilicon Dioxide(SiO2)min 85 %Loss ...