Hydroxypropyl methyl cellulose i roto i te kumete maroke, he iti rawa te taapiri etera cellulose, engari ka taea te whakapai ake i te mahi o te kumete maku, ko te mahi hanga moata tetahi o nga taapiri matua. Na, hydroxypropyl methyl cellulose whakamahia i roto i te kumete maroke cellulose ether ko te nuinga o te hydroxypropyl methyl cellulose ether (HPMC). Hydroxypropyl methyl cellulose i roto i te kumete maroke HPMC te nuinga whai wāhi i roto i te pupuri wai, thickening, te whakapai ake i te mahi o te hanga. Ko te Hydroxypropyl methylcellulose HPMC kaore e uru ki tetahi tauhohenga matū, he mahi awhina anake. Ko te paura putty he wai taapiri, ki runga i te pakitara, he tauhohenga matū, no te mea kei reira te whakatipuranga o nga mea hou, te paura putty ki runga i te pakitara mai i te pakitara, ka kuia ki te paura, katahi ka whakamahia, kua kore, na te mea kua hanga he he mea hou (konupora warowaiha). Ko nga waahanga matua o te paura konupūmā hina ko: Ca(OH)2, CaO me te iti o te ranunga CaCO3, CaO+H2O=Ca(OH)2 – Ca(OH)2+CO2=CaCO3↓+H2O pungarehu konupūmā i roto i te wai. me te rangi i raro i te mahi o CO2, te hanganga o te konupūmā pākawa waro, me te HPMC anake te pupuri wai, konupūmā awhina pungarehu pai tauhohenga, ona ake kihai i whai wāhi i roto i tetahi tauhohenga.
Ko te kounga teitei o te hydroxypropyl methyl cellulose ka taea te marara i roto i te kumete ciment me nga hua raima, me te kikii i nga matūriki totoka katoa, ka hanga he paparanga o te kiriata makuku, ka tukuna te makuku i roto i te turanga mo te wa roa, me te tauhohenga o te wai pararopi. , kia rite ki te whakarite i te kaha here me te kaha compressive o rauemi. Na reira, i roto i te hanga raumati tiketike pāmahana, i roto i te tikanga ki te whakatutuki i te pānga pupuri wai, Me ki te tāpiri i te kounga teitei hua HPMC i runga i te tātai, ki te kore, ka maroke tere rawa, ka meinga e te iti hydration, whakaiti kaha, kapiti, kau. pahū me te taka atu me etahi atu raruraru kounga, engari ka piki ake te uaua o te hanga kaimahi. I te hekenga o te pāmahana, ka taea te whakaiti i te nui o te wai e tapirihia ana e te HPMC, a ka taea te whakatutuki i taua mana pupuri wai.
Te wa tuku: Sep-16-2022