He aha te whakamahinga o te cellulose ether?

Etera celluloseKa roa ake te wā whakatakoto o te whakapiri sima, te kupenga moata rānei, ka whakaroa i te tere o te makuku o te sima, he mea whai hua tēnei hei whakapai ake i te wā mahi o te rauemi turanga sima, hei whakapai ake i te ōritetanga me te hinga o te raima i muri i te ngaromanga, engari ka whakaroa pea i te ahunga whakamua o te hanganga, inā koa i ngā āhuatanga taiao pāmahana iti mō te whakamahinga o te moata me te raima.

I te nuinga o te wā, ko te nui ake o te ihirangi o te cellulose ether, ka roa ake te wā whakatō o te paru sima me te moata, ā, ka kitea ake te puhoi o te whakatōtōtanga o te matū. Ka taea e te cellulose ether te whakaroa i te whakatōtōtanga o ngā wāhanga kohuke clinker tino nui, arā, te tricalcium aluminate (C3A) me te tricalcium silicate (C3S) i roto i te sima, engari kāore te pānga ki ō rātou kaha whakatōtōtanga i te rite. Ko te cellulose ether te mea nui hei whakaiti i te tere tauhohenga o te C3S i te wāhanga whakaterenga, engari mō te pūnaha C3A-Caso4, ka roa ake te wā whakatōtōtanga.

I whakaatuhia e ngā whakamātautau anō ka taea e te cellulose ether te aukati i te whakarewatanga o te C3A me te C3S, te whakaroa i te tioata o te konupūmā aluminate me te konupūmā hauwaiwai, me te whakaiti i te nucleation me te tere tipu o te CSH i runga i te mata o ngā matūriki C3S, engari he iti noa te pānga ki ngā tioata ettringite. I kitea e Weyer et al. ko te nui o te whakakapinga DS te mea matua e pā ana ki te makuku sima, ā, ko te iti o te DS, ko te kitea ake o te whakaroa o te makuku sima. Mō te tikanga o te cellulose ether ka whakaroa i te makuku sima.

I whakapono a Sliva me ētahi atu i whakanui ake te cellulose ether i te matotoru o te wairewa pore, ā, i aukati i te tere o te nekehanga katote, ā, i whakaroa i te whakamakuku o te sima. Heoi, i kitea e Pourchez me ētahi atu kāore i te mārama te whanaungatanga i waenga i te cellulose ether i whakaroa i te whakamakuku o te sima me te matotoru o te paru sima. I kitea e Schmitz me ētahi atu kāore he pānga o te matotoru o te cellulose ether ki te tere o te whakamakuku o te sima.

I kitea anō hoki e Pourchez he tino pumau te cellulose ether i raro i ngā āhuatanga kawakore, ā, kāore e taea te kī ko tōna whakaroa i te whakamakuku o te sima nā te pirau ote etera celluloseKo te mimiti pea te tino take e whakaroa ai te whakamakuku o te sima etera cellulose, he maha ngā tāpiringa rauropi ka mimiti ki ngā matūriki sima me ngā hua whakamakuku, ka ārai i te whakarewanga o ngā matūriki sima me te tioata o ngā hua whakamakuku, ā, ka whakaroa i te whakamakuku me te whakatōtō o te sima. I kitea e Pourchcz me ētahi atu, ko te kaha ake o te kaha mimiti o ngā hua whakamakuku me te etera cellulose, ka kitea te whakaroa.

E whakaponohia whānuitia ana ka piri te nuinga o ngā ngota cellulose ether ki ngā hua waikura, ā, he onge te piri ki te wāhanga kohuke taketake o te clinker.