Ko te aukati marara he tohu hangarau nui hei ine i te kounga o te anti – dispersant.Ko te Hydroxypropyl methyl cellulose he pūhui polymer wairewa-wai, e mohiotia ana ano he kapia wairewa-wai, he polymer wairewa-wai ranei.Ka whakanui ake i te rite o te ranunga ma te whakanui ake i te pokey o te wai whakaranu.He momo rauemi polymer hydrophilic, ka taea te rewa ki te wai ka hanga he otinga, he wai marara ranei.Ko nga whakamatautau e whakaatu ana ka piki ake te nui o te superplasticizer punaha naphthalene, ko te taapiri o te superplasticizer ka whakaiti i te aukati marara o te kumete ciment hou.Ko tenei na te mea ko te raupapa naphthalene teitei o te wai whakaheke wai e whai hua ana ki te kaihoko kaha o te mata, i te wa e tapirihia ai te kaihoko whakaheke wai ki te kumete, ko te kaihoko whakaheke wai i roto i te matūriki ciment te mata o te matūriki ciment me te utu kotahi, te hanganga o nga matūriki ciment i hangaia ma te wehewehe, te takai i roto i te hanganga o te tuku wai, ka mate te wahanga o te sima.I te wa ano, ka kitea ko te pikinga o te ihirangi HPMC, he pai ake, he pai ake te whakamararatanga anti o te kumete ciment hou.
Te kaha o te raima:
Ko te whakaurunga raima kore-dispersive HPMC i raro i te wai i whakamahia i roto i te miihini turanga piriti o te huarahi tere, a ko te tohu kaha hoahoa ko C25.I muri i te whakamatautau taketake, ko te inenga ciment he 400kg, he 25kg/m3 te inenga i konatunatua, he 0.6% o te inenga ciment HPMC, he 0.42 te tauwehenga sima wai, he 40% te tere o te onepu, he 8% te hua o te naphthalene. o te inenga ciment, te tauira raima i roto i te rangi 28d, te kaha toharite ko 42.6MPa, Ko te kaha toharite o te raima i ringihia ki raro i te wai me te teitei hinga o 60mm i roto i te wai ko 36.4mpa mo te 28 ra, me te ōwehenga kaha o te raima i hanga i roto i Ko te wai me te raima i hangaia i te hau he 84.8%, e whakaatu ana i te painga nui.
1. Ko te tapiritanga o te HPMC he tino whakaahuru i te ranunga moata.Na te pikinga o te inenga o te HPMC, ka roa te wa whakatuu moata.I raro i te ahua ano o te inenga HPMC, he roa ake te wa whakarite mo te kumete i raro i te wai i to te hau.He painga tenei ahuatanga mo te pupuhi raima i raro i te wai.
2, i konatunatua ki te hydroxypropyl methyl cellulose o te kumete ciment hou he pai te whakakotahitanga, tata kore te ahua o te toto.
3, HPMC inenga me te moata tono wai tuatahi heke, ka nui haere tino.
4. Ko te kaporeihana o te whakaheke wai ka whakapai ake i te raru o te piki ake o te hiahia wai mo te kumete, engari me whakahaere tika, ki te kore ka whakaitihia i etahi wa te aukati marara o raro i te wai o te kumete ciment hou.
5. He iti te rereketanga o te hanganga i waenga i nga tauira slurry kupenga sima whakauru HPMC me nga tauira paatea, a he iti te rereketanga o te hanganga me te kiato i waenga i nga tauira ciment kua ringihia ki te wai me nga tauira slurry kupenga kupenga ki te hau.Ko te 28d te tauira hanga i raro i te wai he paku wetewete.Ko te take nui ko te taapiri o te HPMC ka nui te whakaheke i te mate me te marara o te ciment i te wa e ringihia ana te wai, engari ka whakaheke ano hoki i te tohu o te taapiri ciment.I roto i te kaupapa, i raro i te ahua o te whakapumau i te paanga o raro o te wai kaore e marara, ka whakahekehia te nui o te whakaranu o te HPMC i te mea ka taea.
6, tāpiri HPMC raro wai e kore e titaria admixture raima, whakahaere i te nui o te kaha pai, whakaatu te kaupapa pairati e te ōwehenga kaha o te hanga raima i roto i te wai, me te hanga i roto i te rangi ko 84.8%, he nui ake te pānga.
Te wa tuku: Sep-17-2022