?????： ??? ???? ????? ?形成 ?? ??? ????? ????? ??????, ?? ??? ????? ???????? ?????? ??????, ???? ???? ????? ????? ???????, ??? ????? ????? ?????? ?????? ????. ????? ??, ??? ?????? ???? ????? ?????? ????.

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

??? ???? ???? ???? ???? ???? ?????：

??? ????: ?????? ??? ????? ??????? ?? ???? ?-5 ?"?, ?????? ?????? ?????? (????? ???? ?????), ?????? ??? ????.

??? ?????： ?????? ???, ????? ???? ?? ????? ???????? ????? ??????? ?? ???? ?-4.7 ?"?, ???????? ?? ??? ????? ?????? ???? ???? ????? ???? ????, ??? ??????? ???? ???????? ???? ??????.

Natural sand vs Manufactured sand

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

1. ???? ???? ?? ??? ?????? ???? ?????? ???? ????? ?? ??? ???? ????? ?????. ??? ?????? ?????? ????? ?? ????? ??? ?????? ??? ?????, ????? ?????? ?????, ????? ?????? ?? ???????? ?????????? ??? ??????? ???? ??????? ?????? ????? ????? ???????, ?? ????? ????? ????? ??? ???? ???? ??? ?????.

2. ??? ???? ?? ??? ????? ???? ??? ????? ???? ?????? ?? ??? ????? ???, ???? ??? ?????? ?? ???? ????? ????? ??????, ?? ??????? ???? ???????? ?????? ?????? ???? ?? ?????? ?????? ??? ???.

3. ????? ???? ?? ??? ?????? ?????? ?????? ???? ????? ?????. ????? ????, ?????? ??????? ????? ???????, ???? ????? ???? ????? ?? ????? ????? ??????? ??????? ?????? ??? ????? ??????? ?? ???? ??????, ??? ?? ?? ???? ?? ????? ????? ??????, ??? ?? ???? ?? ????? ?????? ??????? ??????.

4. ?????? ???? ????? ??? ????? ?????? ????? ????? ????, ???? ?????? ?? ???? ?????? ?? ????? ????? ?????? ?? ?????? ?? ????? ??????.

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

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

?? ?? ??????? ?????? ???? ?????? ??? ?????. ???? ??????? ??? ?????, ?? ?????? ??????? ?????? ????, ????:

1. ?? ?????? ???? ??????? ?????? ??? ????? ?? ?????? ??????? ???? ?????? ????, ???????? ?? ?????? ???? ?? ???????? ?????????? ?? ??????? ???????, ?? ?????? ??????? ?????, ???? ???? ??????? ????.

2. ????: ?????? ??????? ????? ???? ???, ???? ??? ?????? ?????? ?????? ??? ????? ???????.

3. ????? ???? ?? ????? ??????: ?? ???? ????? ????? ???? ?? ???? ???? ??? ?????, ?? ?????? ???? ????? ????.

????? ??? ?????? ?????? ??? ??????: ???, ???, ?????, ????, ??????, ??? ???, ???????, ?????, ???, ???, ??????, ???? ????; ????? ?????, ????? ??????, ????? ?????? ???'. ????? ????? ????, ?? ?????? ??????? ???????.

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

????? ?????? ?? ??? ???? ????? ???? ???? ????? ???? ?????? ?????: ??? ???? → ????? ?? → ????? ???? → ????? ?? → ????? → ???? ??? → ??? ???? ?????. ?????, ????? ????? ???? ??? ???? ?? ???? ??????? ???? ????? ??? ????? ??? ???? ????? ?? ???? ??????? ?? ???? ?-4.75 ?"?.

production process of manufactured sand

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

?? ?? ???? ????? ???? ????, ????? ????? ???? ???? ???? ?-"????? ??? ????", "????? ??? ???" ?-"????? ??? ??? ???"; ?? ?? ???? ??????, ???? ???? ?-"????? ??? ????" ?-"????? ??? ?????"; ?? ?? ?????, ???? ???? ?-"????? ??? ????" ?-"????? ??? ???? ????".

????? ??? ???? ???? ????? ???? ??? ?????? ??? ????? ?? ???? ??? ????, ??? ???? ????? ????? ???? ?? ???? ????, ?? ????? ???? ??? ???? ??? ???? ??????? ??? ???????. ????? ??? ??? ???? ????? ?????? ??? ?? ??? ???? ????? ???. ???? ??? ???? ????, ???? ???? ???? ???? ??????, ?????? ???? ??? ???? ????, ?? ?? ????? ?????? ??????? ?? ???? ???? ?? ????? ????.