We have used filter sand to construct our home and for mold we have used trichy sand, The building is almost completer just final Flor is pending, Now many people come to me and say that we are using wrong sand this sand is not so good for construction. Is there anything I can do about this Please do let me know if there is anything.
I had to Google Trichy and filter sand to try to decipher your question.
I'm guessing you mean you are using river sand from the Trichy area (Bangalore, India). For structural concrete, you should have sand (about 1 mm), gravel (5 to 20 mm), and cement.
If you have sand but no gravel, that is not good. Gravel but no sand, also not good.
Some sand is dirty, with clay or organic material, and that is not good...but you say filter sand so that should be clean. Some sand is too round/smooth to make a good bond and some, like crushed coral or pumice, is too soft.
In US we have very specific mix designs, test the sand and gravel, and we break samples of cured concrete to make sure it is as strong as advertised before removing formwork or shoring.
From what I understand when sand prices went high certain unscrupulous elements dug out mud and repeatedly washed it, to produce what is called as filter sand, near Herbal Bangalore a school girl was killed when a wall collapsed which was made of filter sand. Ever since the govt has banned use of this sand. Finally you can do a test yourself take some sand and put it in water you will find a lot if silt and mud which does not provide good bonding, if you still want to use it Pls increase proportion of cement, and never use for concrete and building foundations. It could be used for plastering? Pls consult experts.