Ngā Hua
Tohu Rori Whakaata Oneone Whakakākahu Pīrere Karāhe Mārama
Whakaahuatanga o ngā Pīra Karāhe
Ko ngā pirepire karāhe whakaata-tiketike, e mōhiotia ana ko ngā pirepire karāhe whakaata-muri, he pirepire porowhita iti e whakamahia ana i ngā tohu rori hei whakapai ake i te tirohanga me te whakapai ake i te haumaru.
Ko te kaupapa matua o te whakamahi i ngā pirepire karāhe whakaata-teitei i roto i ngā tohu rori, he mea kia kitea ake ai ngā tohu rori, ngā tohu ara, me ētahi atu tohu huarahi, inā koa i te pō me te ua.
Ngā Pīra KarāheNgā Whakatakotoranga
| Tono | Ngā Rahi e Wātea ana |
| Te pupuhi onepu | 20# 30# 40# 40# 60# 70# 80# 90# 120# 140# 150# 170# 180# 200# 220# 240# 325# |
| Te huri | 0.8-1mm 1-1.5mm 1.5-2mm 2-2.5mm 2.5-3mm 3.5-4mm 4-4.5mm 4-5mm 5-6mm 6-7mm |
| Tohu rori | 30-80 mata 20-40 mata BS6088A BS6088B |
Ngā Pīra KarāheTe Hanganga Matū
| SiO2 | ≥65.0% |
| Na2O | ≤14.0% |
| CaO | ≤8.0% |
| MgO | ≤2.5% |
| Al2O3 | 0.5-2.0% |
| K2O | ≤1.50% |
| Fe2O3 | ≥0.15% |
Ngā Painga o ngā Pīra Karāhe:
-Kāore e whakarerekē i te rahi o te rauemi turanga
-He pai ake te taiao i ngā maimoatanga matū
-Waiho he tānga porowhita, ōrite ki te mata o te wāhanga kua pahūtia
-He iti te tere pakaru
-He iti ake ngā utu whakakore me te tiaki
-Kāore te karāhe Soda Lime e tuku paitini (kāore he silica kore utu)
-He pai mō ngā taputapu pupuhi pēhanga, momi, pupuhi mākū me te pupuhi maroke
-E kore e poke, e waiho rānei he toenga ki runga i ngā wahi mahi
Ngā Pīra KarāheTono
-Te horoi pahūtanga–te tango i te waikura me te unahi mai i ngā mata whakarewa, te tango i ngā toenga pokepokea ai mai i te whakarewanga me te tango i te tae whakamahana
-Te whakaotinga o te mata–te whakaoti i ngā mata hei whakatutuki i ngā pānga tirohanga motuhake
-Whakamahia hei kaiwhakamarara, hei huri i ngā mea me ngā rauemi tātari i roto i te ahumahi awatea, peita, waituhi me te matū
-Tohu rori
Tō Uiui
Mena he pātai āu, tēnā whakapā mai.
