Idethi Yokuthumela: 20, Jun, 2022

3. Indlela yokusebenza yama-superplasticizers

Indlela ye-ejenti yokunciphisa amanzi yokuthuthukisa uketshezi lwengxube kakhonkolo ikakhulukazi ihlanganisa umphumela wokuhlakaza kanye nomphumela wokugcoba.I-ejenti yokunciphisa amanzi empeleni iyi-surfactant, enye ingxenye yochungechunge olude lwamangqamuzana luncibilika kalula emanzini - iqembu le-hydrophilic, kanti elinye ekugcineni alincibiliki emanzini - iqembu le-hydrophobic.

a.Ukuhlakazeka: Ngemva kokuba usimende uxutshwe namanzi, ngenxa yokukhanga kwamangqamuzana ezinhlayiya zikasimende, udaka lukasimende lwakha isakhiwo se-flocculation, ukuze u-10% kuya ku-30% wamanzi okuxuba ahlanganiswe ezinhlayiyeni zikasimende futhi angakwazi ukuhlanganyela mahhala. ukugeleza kanye nokugcoba.umphumela, ngaleyo ndlela kuthinte uketshezi lwengxube kakhonkolo.Lapho i-ejenti yokunciphisa amanzi yengezwa, ngenxa yokuthi ama-athomu e-ejenti yokunciphisa amanzi angakhangiswa ngendlela eqondile ebusweni bezinhlayiya zikasimende, ingaphezulu lezinhlayiya zikasimende linenkokhelo efanayo (imvamisa ukushaja okungekuhle), okwenza umphumela we-electrostatic repulsion, okuyinto ikhuthaza ukuhlakazeka kwezinhlayiya zikasimende kanye nokubhujiswa kwesakhiwo se-flocculation., khulula ingxenye egoqiwe yamanzi futhi uhlanganyele ekugelezeni, ngaleyo ndlela ukwandisa ngokuphumelelayo uketshezi lwengxube yekhonkrithi.

b.Ukugcoba: iqembu le-hydrophilic ku-superplasticizer li-polar kakhulu, ngakho-ke ifilimu ye-adsorption ye-superplasticizer ebusweni bezinhlayiya zikasimende ingakha ifilimu lamanzi elincibilikisiwe elizinzile elinama-molecule amanzi, futhi le filimu yamanzi ine-Lubrication enhle inganciphisa ngempumelelo ukushelela. ukumelana phakathi kwezinhlayiya zikasimende, ngaleyo ndlela kuthuthukiswe uketshezi lukakhonkolo.

Umthelela wesinciphisi samanzi kukhonkolo, njll.:

a.Setha isikhathi.Ama-superplasticizer ngokuvamile awanawo umphumela wokuhlehlisa, futhi angase akhuthaze ngisho nokufakwa kwamanzi kanye nokuqina kukasimende.I-superplasticizer ehlehlisiwe iyinhlanganisela ye-superplasticizer ne-retarder.Ngaphansi kwezimo ezivamile, ukuze kubambezeleke ukugeleza kukasimende futhi kunciphise ukulahlekelwa kwe-slump, inani elithile le-retarder lengezwa ku-ejenti yokunciphisa amanzi.

b.Okuqukethwe kwegesi.Njengamanje, i-polycarboxylate water reducer evame ukusetshenziswa inokuqukethwe okuthile komoya, futhi okuqukethwe komoya wekhonkrithi akufanele kube phezulu kakhulu, ngaphandle kwalokho amandla okhonkolo azoncishiswa kakhulu.

c.Ukugcinwa kwamanzi.

Ama-Superplasticizer awafaki isandla kakhulu ekwehliseni ukopha kukakhonkolo, futhi angase andise nokopha.Ukopha okukhonkolo kuyanda lapho umthamo udlulele.