?????? ???：???? ??? ????? ???? ?????? ?????? ?? ????? ??? ?? ??? ?????? ????? ???? ??? ??? ??????? ???? ??? ???????? ?? ???? ????? ??? ???? ??????? ?????? ??? ?????? ???? ???? ??? ??? ?? ???? ???? ???? ??? ????? ???? ?????

???? ??? ???? ??? ??? ???

???? ?? ?? ???? ????? ??? ??????? ??? ??? ??????

???? ??? ???? ????? ?? ?5? ????? ???? ???? ???? ??? ????? ??? ??? ??? ?? ????? ???? ?? ???? ??? ???? ????? ???

????? ????? ????? ??? ???? ??? ??????? ??? ??? ????? ??? ?4.7 ?? ??? ???? ??? ??? ?? ???? ????? ????????? ???? ??? ?? ???? ?????? ??? ?? ??? ?? ???? ????? ??? ??? ??? ?????

Natural sand vs Manufactured sand

????? ?? ????

1. ????? ????? ??? ???? ??? ???? ???? ????? ????? ? ??? ?????? ???? ????? ??? ????? ???? ????? ????? ??? ??? ?????? ???? ??? ???????? ???????? ??? ????? ???? ??? ?? ???? ??? ??? ??? ???? ????? ??? ???? ??? ???? ???? ??? ????? ??? ????

2. ???? ???? ??? ??? ???? ????? ??? ?????? ????? ?????? ????? ???? ???? ???? ????? ????? ?? ??? ??? ????? ???? ???? ??? ???? ????? ???? ????? ??? ???? ?? ???? ??? ?? ????? ??? ?????????

3. ???? ??? ??? ????? ???? ???? ??? ???? ?????? ???? ??? ?????? ???? ???? ????? ???? ???? ???? ???? ??? ??? ??? ?? ??? ??? ??? ???? ????? ?????? ??? ??? ??? ???? ???? ?? ????? ???? ?? ??? ????? ??? ???

4. ?.?.? ??? ????? ??? ???? ?? ???? ??? ?? ??? ??? ??? ?? ????? ??? ?????? ?????? ???? ???? ??? ??? ??? ?? ???? ???? ???? ??????

???? ??? ???? ???? ???

(1) ???? ?????? ????

????? ????? ?? ????? ?? ???? ?? ????? ?????? ??? ??? ????? ????? ??? ???? ? ??????? ???? ?????? ??? ???? ???? ? ???? ??? 2 ???? ??? ???? ??? ???? ???? ???? ?????? ?????? ?????? ??? ???? ????

1. ?????? ????? ????? ?????? ??? ???? ?????? ??? ???? ?????? ????? ???? ???? ???? ????? ??? ????? ??? ???? ????? ??? ???? ???? ??? ???? ???? ?? ??? ???? ??? ?????

2. mine: ???? ?????? ??? ??? ??? ??? ??? ??? ???? ??? ?????? ??? ?? ?? ???? ?? ?? ??? ???? ????? ???? ??? ?? ???? ???? ???? ??? ??? ?? ????? ???? ????

3. ???? ???? ??? ??????? ???? ????? ???? ??? ????? ??? ?????? ???? ??? ???? ??? ??????? ??? ??? ???? ??? ???? ?????

???? ???? ?? ??? ???? ?????? ???? ???? ??? ???????? ??? ????? ??? ?????? ??? ????? ??? ?????? ??? ??????? ??? ??????? ??? ????? ??? ??? ??? ????? ??? ????? ??? ???? ??? ?????? ??? ?????? ????? ??? 65 ???? ????? ????? ??? ?? ???? ??? ????? ?????? ??? ???? ???? ???? ????? ????? ????? ???? ?????

(2) ??? ????? ???

????? ??? ????? ????? ??? ????? ??????- ?????? ?? ??? ????? → ???? ????? → ??? ????? → ??? ???? → ??????? ????? → ????? ?? ??? ???? ??? ????? ???? ????? ???? ??? ??? ???? ???? ??? ???? ??? 4.75 ?? ??? ???? ???? ????? ???? ??? ????? ???? ????

production process of manufactured sand

(3) ??? ??? ??? ???

?? ???? ???? ??????? ????? ????? ????? ???? ???? ??? ????? ?????? ???? ????? ????? ?? "??? ????? ?????" ?? ?? ???? ?????? ???? ????? ???? ?????? ???? ???? ???? "????? ????? ?????" ?????

??? ??? ???? ?????? ?? ?? ?????? ????? ?? ????? ???? ?????? ??? ?? ??? ??? ????? ????? ????? ??? ??? ???? ????? ????? ?? ?? ?????? ???? ??? ?? ?? ????? ?????? ???? ???? ????? ???? ????? ??? ??? ??? ?? ??? ???? ??? ??? ????? ??? ?? ??? ???? ?? ???? ????? ??? ???? ???? ??? ????? ????? ???? ????? ????? ?????? ????? ?? ???? ????? ???? ??? ???????