Qhov loj ntawm cov hmoov roj hmab feem ntau yog ntsuas hauv mesh, uas qhia cov naj npawb ntawm qhov qhib ib square inch ntawm lub vijtsam sieve. Ib qho mesh suav ntau dua txhais tau tias cov hmoov hmoov zoo dua. Roj hmab hmoov ntawm ntau qhov sib txawv muaj qhov sib txawv ntawm cov ntawv thov.Cov hauv qab no yog cov ntsiab lus ntawm cov roj hmab hmoov mesh qhov ntau thiab tsawg, lawv qhov sib thooj ntawm lub cev, thiab cov xwm txheej ntawm daim ntawv thov:
| mesh | aperture loj (mm) | roj hmab particle loj (mm) |
| 5 | 4.0 | 4.0 |
| 8 | 2.5 | 2.362 |
| 10 | 2.0 | 1.7 |
| 16 | 1.18 | 1.0 |
| 20 | 1.00 | 0.833 |
| 24 | 0.75 | 0.701 |
| 26 | 0.71 | 0.635 |
| 30 | 0.6 | 0.542 |
| 40 | 0.45 | 0.38 |
| 60 | 0.28 | 0.25 |
| 80 | 0.22 | 0.18 |
I. Coarse roj hmab hmoov (5-30 mesh)
Cov yam ntxwv: Loj particle loj, zoo elasticity, thiab siab cua / dej permeability. Cov ntawv thov tseem ceeb: Feem ntau yog siv rau kev ua kis las ua si surfacing, dag turf infill, roj hmab hauv pem teb vuas, suab rwb thaiv tsev pads, thiab automotive underbody anti- kev sib tsoo txheej.
II. Nruab nrab- cov hmoov roj hmab zoo (40–60 mesh)
Cov yam ntxwv: Ntsuas lub zog thiab elasticity; yooj yim sib xyaw nrog cov roj hmab nkauj xwb. Daim ntaub ntawv tseem ceeb: Siv dav hauv cov log tsheb retreading, conveyor siv siv, roj hmab hoses, roj hmab ntawv, waterproofing membranes, thiab khau ib leeg cov ntaub ntawv.
III. Cov roj hmab zoo (80-100 mesh)
Cov yam ntxwv: siab tshwj xeeb thaj chaw thiab siab reactivity; zoo heev compatibility nrog cov ntaub ntawv polymer. Cov ntawv thov tseem ceeb: Feem ntau siv hauv kev tsim cov khoom siv siab- cov log tsheb ua haujlwm, cov txheej txheem dej tsis zoo, cov nplhaib sib khi, thiab kev poob siab- cov khoom nqus dej, nrog rau cov khoom siv ntxiv rau kev hloov kho asphalt (txhim kho txoj kev loj tiv thaiv kev laus thiab tawg).
