Hello sir,i'm Sai Pavan from INDIA studying masters in K.L.UNIVERSITY,Vijayawada.As a part of our project i would like to do research on granite sludge/powder which is obtained from the cutting of raw stone block.In my area i found 110 granite cutting industries so you can imagine how much wastage is producing every year because of that wastage local people are getting many health problems
Here i'm planning for the replacement of those powder with sand or cement in concrete and replacement of sand with this powder in filling works in embankments and regular constructions.
there may have possibility of sulfurs it may leads to damage of our construction
sir please tell me what are the basic chemical tests to be conducted to check whether it is perfect to use in concrete or filling.
You can not easily replace sand with granite flour. Problem is not the chemical composition, but grain size distribution: sand has quite narrow grain size distribution and granite flour - a very wide. Too fine granite particles are harmful to the concrete because they land between cement particles and thus reduce the strength of the concrete ( in contrast to the cement particle, the granite particles do not react with water and do not form a chemical bond). Sand, on the other hand, has very little of such fine particles.
The other way round, but also bad, with the use of granite flour as a feeler for rubber or other polymers. You need very fine particles for this, but granite flour contains fine as well as coarse particles. Unlike concrete, coarse particles are detrimental to the filling of polymers.
In other words, before you use granite flour as a filler you must either sift out the fine particles or finely grind them all.
Hi Pavan,
Granite processing requires lot of water when compared to other stones. That is why, the quantum of granite slurry is more. Due to its high fineness, zoning all the materials would be little difficult. You can homogenize the particle size before using them.
For characterization, you can use tests like XRF, XRD and SEM.
U can expect changes in the argillaceous-calcareous ratios mainly SiO2 and content CaO which might have an effect on the behavior of both cement pastes and concrete mix.
Also, low CaO and high SiO2 and Al2O3 contents might affect the chemical composition of mixtures.
All the best!
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