Te whakapai ake o te hydroxypropyl methylcellulose (HPMC) i runga i nga rauemi ciment

I nga tau kua pahure ake nei, me te whanaketanga tonu o te hangarau whakamarumaru taiepa o waho, te ahunga whakamua tonu o te hangarau hanga cellulose, me nga ahuatanga pai o te HPMC ake, kua whakamahia nuitia a HPMC i roto i te umanga hanga.

Hei tuhura ake i te tikanga o te mahi i waenga i te hydroxypropyl methylcellulose (HPMC) me nga mea hanga sima, ka aro tenei pepa ki te painga o te whakapai ake a Jinshuiqiao hydroxypropyl methylcellulose (HPMC) i runga i nga ahuatanga honohono o nga rawa-kima.

wā whakatō

Ko te wa whakatuu o te raima te nuinga e pa ana ki te wa whakatuu o te ciment, a he iti te awe o te whakahiato, na reira ka taea te whakamahi i te waa whakatakoto o te kumete hei utu ki te ako i te awe o te HPMC i runga i te waa whakatuu o te ranunga raima kore-dispersible i raro i te wai, no te mea ko te wa whakatuu o te kumete e pa ana ki te wai Na reira, ki te arotake i te awe o te HPMC i runga i te wa whakatuu o te moata, he mea tika ki te whakatika i te tauwehenga wai-ciment me te tauwehenga moata o te moata.

E ai ki te whakamatautau, ko te taapiri o te HPMC he nui te paheketanga o te ranunga moata, a ko te wa whakatuu o te kumete ka roa haere i muri i te pikinga o te ihirangi HPMC.I raro i te ihirangi HPMC kotahi, he tere ake te kumete whakakikorua i raro i te wai i te kumete i hangaia i te rangi.He roa ake te wa whakatuu mo te hanga reo.Ina ine i roto i te wai, ka whakatauritea ki te tauira patea, ka whakaroa te wa whakatuu o te kumete i konatunatua ki te HPMC ma te 6-18 haora mo te tuunga tuatahi me te 6-22 haora mo te whakatakotoranga whakamutunga.Na reira, me whakamahi te HPMC me nga kaiwhakatere.

Ko te HPMC he polymer molecular teitei me te hanganga raina macromolecular me te roopu hydroxyl i runga i te roopu mahi, ka taea te hanga i nga here hauwai me nga ngota ngota wai whakaranu me te whakanui ake i te pokey o te wai whakaranu.Ko nga mekameka ngota roa o te HPMC ka kukume tetahi ki tetahi, ka uru nga ngota ngota HPMC tetahi ki tetahi ki te hanga i te hanganga whatunga, te takai sima me te whakaranu wai.I te mea ka hangahia e te HPMC he hanganga whatunga e rite ana ki te kiriata me te takai i te sima, ka whai hua te aukati i te wawaotanga o te wai i roto i te kumete, me te aukati, te whakaroa ranei i te tere o te hydration o te sima.

Te whakaheke toto

Ko te ahua o te whakaheke toto o te kumete he rite ki tera o te raima, ka nui ake te taunga whakahiato, ka piki ake te ōwehenga wai-sima o te paparanga o runga o te slurry, ka nui te whakaheke kirihou o te paparanga o runga o te slurry i te timatanga. atamira, a tae noa kapiti, me te kaha o te paparanga mata o te slurry He ngoikore.

Ka eke ki runga ake i te 0.5% te horopeta, karekau he ahua toto.Ko tenei na te mea ka whakauruhia te HPMC ki roto i te kumete, he hanga kiriata me te hanganga whatunga a HPMC, a, ko te whakauru o nga roopu hydroxyl i runga i te mekameka roa o nga macromolecules ka hanga te ciment me te whakaranu i te wai i roto i te kumete hei pupuhi, hei whakarite i te hanganga pumau. o te moata.Whai muri i te taapiri HPMC ki te kumete, he maha nga mirumiru hau iti motuhake ka puta.Ka tohatohahia enei mirumiru hau ki roto i te kumete, ka aukati i te tukunga o te whakahiato.Ko te mahi hangarau a te HPMC he nui te awe ki runga i nga taonga ciment-based, a he maha nga wa e whakamahia ana ki te whakarite i nga rauemi hiato hou o te ciment penei i te paura paura maroke me te paru polymer, kia pai ai te pupuri i te wai me te pupuri kirihou.

Te hiahia wai moata

Mena he iti te nui o te HPMC, he nui te awe ki te hiahia wai o te moata.I roto i te take o te pupuri i te tohu roha o te kumete hou kia rite tonu, ko te ihirangi HPMC me te tono wai o te kumete ka huri i roto i te hononga raina i roto i tetahi waa, ka heke te tono wai o te kumete i te tuatahi ka piki ake. mārama.A, no te iti iho i te 0.025% te nui o te HPMC, me te piki ake o te nui, ka heke te tono wai o te kumete i raro i te tohu roha ano, e whakaatu ana ka iti te nui o te HPMC, ka whai hua te whakaheke wai ki te kumete, me te HPMC he awenga hau.He maha nga mirumiru hau iti motuhake kei roto i te kumete, a ko enei mirumiru hau hei whakahinuhinu hei whakapai ake i te rere o te moata.Ka nui ake te inenga i te 0.025%, ka piki te tono wai o te moata me te pikinga o te inenga.Ko tenei na te mea kua oti ake te hanganga whatunga o te HPMC, a ka poto te aputa i waenga i nga flocs i runga i te mekameka ngota roa, e whai hua ana te kukume me te whakakotahitanga, me te whakaheke i te rerenga o te moata.Na reira, i raro i te ahuatanga he rite tonu te tohu o te roha, ka whakaatu te slurry i te pikinga o te hiahia wai.

01. Whakamātautau ātete marara:

Ko te anti-dispersion he tohu hangarau nui hei ine i te kounga o te kaihoko anti-dispersion.Ko te HPMC 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 rauemi polymer hydrophilic ka memeha ki te wai hei otinga.marara ranei.

Ko nga whakamatautau e whakaatu ana ka piki ake te nui o te superplasticizer kaha-nui-te-naphthalene, ko te taapiri o te superplasticizer ka whakaiti i te aukati marara o te kumete ciment hou i konatunatua.Ko tenei na te mea ko te whakaheke wai kaha-nui-a-naphthalene he surfactant.Ina whakauruhia te whakaheke wai ki te kumete, ka anga te whakaheke wai ki runga i te mata o nga matūriki ciment kia rite ai te utu o te mata o nga matūriki ciment.Ko tenei whakakorenga hiko e hanga ana i nga matūriki ciment te ahua Ka whakakorehia te hanganga flocculation o te ciment, ka tukuna te wai i takai ki roto i te hanganga, ka puta te ngaro o te waahanga o te ciment.I te wa ano, ka kitea na te pikinga o te ihirangi HPMC, kei te pai haere te aukati marara o te kumete ciment hou.

02. Te kaha o te raima:

I roto i te kaupapa turanga pairati, i whakamahia te whakauru raima kore-dispersible HPMC ki raro i te wai, a ko te tohu kaha hoahoa ko C25.E ai ki te whakamatautau taketake, ko te nui o te ciment he 400kg, ko te 25kg / m3 te nui o te ciment, ko te nui o te HPMC ko te 0.6% o te nui o te ciment, ko te tauwehenga wai-ciment he 0.42, ko te tere o te kirikiri he 40%, me te whakaputanga o te whakaheke wai kaha-nui-a-naphthalene Ko te nui o te ciment he 8%, ko te kaha 28d toharite o te tauira raima i te rangi ko te 42.6MPa, ko te 28d te kaha o te raima o raro me te teitei o te maturuturu o te 60mm i roto i te wai ko te 36.4MPa, me te kaha o te kaha o te raima i hangaia e te wai ki te raima i hangaia e te hau he 84.8 %, he nui ake te painga.

03. Ka whakaatuhia e nga whakamatautau:

(1) Ko te taapiri o te HPMC ka kitea he paheketanga o te ranunga moata.Na te pikinga o nga ihirangi HPMC, ka roa te wa whakatuu moata.I raro i te ihirangi HPMC kotahi, ko te kumete i hangaia i raro i te wai he tere ake i tera i hangaia i te hau.He roa ake te wa whakatuu mo te hanga reo.He painga tenei ahuatanga mo te pupuhi raima i raro i te wai.

(2) Ko te kumete ciment hou i konatunatua ki te hydroxypropyl methylcellulose he pai nga ahuatanga whakakotahi me te tata kore toto.

(3) Ko te nui o te HPMC me te hiahia wai mo te kumete i heke i te tuatahi, katahi ka tino piki haere.

(4) Ko te whakaurunga o te kaihoko whakaheke wai ka whakapai ake i te raru o te nui haere o te tono wai mo te kumete, engari me tika te whakahaere i tana inenga, ki te kore ka heke iho te aukati marara o raro i te wai o te kumete ciment hou i konatunatua i etahi wa.

(5) He iti te rereketanga o te hanganga i waenga i te tauira whakapiri ciment i konatunatua ki te HPMC me te tauira tuwhera, a he iti noa te rereketanga o te hanganga me te kiato o te tauira whakapiri ciment i ringihia ki te wai me te hau.Ko te tauira i hangaia i raro i te wai mo nga ra 28 he paku kirikiri.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 ki te wai, engari i te wa ano ka whakaitihia te iti o te ciment.I roto i te kaupapa, i raro i te ahua o te whakarite i te paanga o te kore e marara i raro i te wai, me whakaheke te inenga o te HPMC ka taea.

(6) Ko te taapiri i te whakaurunga raima kore-dispersible HPMC i raro i te wai, ka whai hua ki te kaha te whakahaere i te inenga.Ko te kaupapa pairati e whakaatu ana ko te kaha o te kaha o te raima i hangaia i te wai me te raima i hangaia e te hau he 84.8%, a he mea tino nui te paanga.