Ka whakaranua ā-tinanatia te paura pūmua marara me ētahi atu mea here kore-waro (pērā i te sima, te raima kua whakamaroketia, te gypsum, me ētahi atu) me ngā momo rauemi, ngā whakakī me ētahi atu tāpiri (pērā i te methyl hydroxypropyl cellulose ether, te māngaro ether, te lignocellulose, ngā mea ārai-wai, me ētahi atu) hei hanga moata maroke-ranu. Ina whakaranua te moata maroke-ranu ki te wai, i raro i te mahi a te colloid tiaki wai-aro me te kutikuti miihini, ka marara ngā matūriki paura rapa ki roto i te wai.
Nā te rerekētanga o ngā āhuatanga me ngā whakarerekētanga o ia paura rapa kua wehea, he rerekē anō hoki tēnei pānga, ko ētahi he pānga ki te whakatairanga i te rere, ko ētahi he pānga ki te whakanui ake i te thixotropy. Ko te tikanga o tōna awe mai i ngā āhuatanga maha, tae atu ki te awe o te paura rapa ki te kaha o te wai i te wā e horapa ana, te awe o te matotoru rerekē o te paura rapa i muri i te horapa, te awe o te colloid tiaki, me te awe o te whitiki sima me te wai. Ko te awe o ngā āhuatanga e whai ake nei ko te awe ki te pikinga o te ihirangi hau o te moata me te tohatoha o ngā mirumiru hau, me te awe o ōna ake tāpiri me te taunekeneke ki ētahi atu tāpiri. Nō reira, ko te whiriwhiringa kua whakaritea me te wehea o te paura polymer ka horapa anō he huarahi nui ki te pā ki te kounga hua. I roto i ēnei, ko te tirohanga whānui ko te paura polymer ka horapa anō ka whakanui ake i te ihirangi hau o te moata, ā, ka whakahinuhinu i te hanganga o te moata, me te kaha me te matotoru o te paura polymer, inā koa ka horapa te colloid tiaki, ki te wai. Ko te pikinga o te α ka whai wāhi ki te whakapai ake i te hononga o te moata hanga, ā, ka whakapai ake i te mahi o te moata. Whai muri i tēnā, ka pania te moata maku kei roto te paura rapa ki te mata mahi. Mā te whakahekenga o te makuku i ngā taumata e toru – te mimiti o te paparanga turanga, te kai o te tauhohenga whakamakuku sima, me te mimiti o te makuku mata ki te rangi, ka whakatata haere ngā matūriki kapia ki te taha, ka hanumi haere te atanga tetahi ki tetahi, ā, ka mutu ka noho hei kiriata pūmua tonu. Ko te nuinga o tēnei tukanga ka puta i roto i ngā pūwero o te moata me te mata o te totoka.
Me whakanui, kia kore ai tēnei tukanga e taea te whakakore, arā, ina kore te kiriata pūmua e marara anō ina tūtaki anō ki te wai, me wehe te kōroiti tiaki o te paura pūmua ka marara anō mai i te pūnaha kiriata pūmua. Ehara tēnei i te raruraru i roto i te pūnaha moata sima kawakore, nā te mea ka whakapūpūtia e te kawakore i hangaia e te whakamakuku o te sima, ā, i te wā kotahi, ka wehea mārire e te mimiti o ngā rauemi quartz mai i te pūnaha me te kore he tiaki wai. Ko te kōroiti, he kiriata kāore e wairewa i roto i te wai, ā, i hangaia mā te marara kotahi o te paura rapa ka marara anō, ka taea te mahi i raro i ngā āhuatanga maroke anake, engari i raro hoki i ngā āhuatanga o te rumaki roa ki te wai. I roto i ngā pūnaha kore-kawakore, pērā i ngā pūnaha gypsum, i ngā pūnaha rānei he whakakī anake, kei te noho tonu ngā kōroiti tiaki i roto i te kiriata pūmua whakamutunga mō ētahi take, ka pā ki te ātete wai o te kiriata, engari nā te mea kāore ēnei pūnaha e whakamahia mō te rumaki roa ki te wai, ā, kei te mau tonu ngā āhuatanga miihini ahurei o te pūmua, kāore e pā ki te tono o te paura pūmua ka marara i roto i ēnei pūnaha.
Wā tuku: Paenga-whāwhā-25-2024