Idethi yokuthunyelwe:5,Meyi,2022

Lapho usimende uxutshwa namanzi, ngenxa yokukhangana phakathi kwama-molecule usimende, ukungqubuzana kokunyakaza okushisayo kwezinhlayiya zikasimende esixazululweni, amacala aphikisanayo amaminerali usimende phakathi nenqubo yokufakwa kwamanzi, kanye nokuhlangana okuthile kwamanzi ancibilikisiwe. ifilimu ngemva kokuba amaminerali usimende afakwe emanzini. kuhlangene, ukuze udaka lukasimende lwakha isakhiwo se-flocculation. Inani elikhulu lamanzi ashukumisayo ligoqwe esakhiweni se-flocculation, ukuze ubuso bezinhlayiya ze-samente bungaxhunywanga ngokugcwele namanzi, okuholela ekwandeni kokusetshenziswa kwamanzi kanye nokwehluleka ukufeza umsebenzi wokwakha odingekayo.

Ngemva kokwengeza i-superplasticizer, iqembu le-hydrophobic le-molecule ye-superplasticizer ekhokhiswayo iqondiswa ngokuqondile phezu kwezinhlayiya zikasimende, futhi iqembu le-hydrophilic likhomba isisombululo esinamanzi, lenze ifilimu ye-adsorption ebusweni bezinhlayiya zikasimende, ukuze indawo engaphezulu. yezinhlayiyana zikasimende zinenani elifanayo. Ngaphansi kwesenzo sokuxoshwa kukagesi, izinhlayiya ze-samente zihlukaniswa komunye nomunye, futhi isakhiwo se-flocculation ye-cement slurry sihlakazwa. Ngakolunye uhlangothi, amanzi amahhala esakhiweni se-flocculation ye-cement slurry ekhishwa, okwandisa indawo yokuxhumana phakathi kwezinhlayiya ze-cement namanzi, ngaleyo ndlela andise i-fluidity yengxube; Ngaphezu kwalokho, ukushelela phakathi kwezinhlayiya zikasimende nakho kuyanda ngenxa yokuqina kwefilimu yamanzi ancibilikisiwe eyenziwe ebusweni bezinhlayiya zikasimende. Lesi isimiso sokuthi ama-ejenti anciphisa amanzi anciphisa ukusetshenziswa kwamanzi ngenxa yokukhangisa, ukuhlakazeka, ukumanzisa kanye nokugcotshwa.

Isimiso: Ngamafuphi, i-ejenti yokunciphisa amanzi ngokuvamile i-surfactant ekhangisa phezu kwezinhlayiya zikasimende, okwenza izinhlayiya zibonise izakhiwo zikagesi. Izinhlayiya ziyaxoshana ngenxa yenkokhelo efanayo kagesi, ukuze izinhlayiya ze-samente zihlakazeke, futhi amanzi amaningi phakathi kwezinhlayiya akhululwe ukuze kuncishiswe amanzi. Ngakolunye uhlangothi, ngemva kokwengeza i-ejenti yokunciphisa amanzi, ifilimu ye-adsorption yakhiwa ebusweni bezinhlayiya zikasimende, ezithinta isivinini se-hydration sikasimende, yenza ukukhula kwekristalu ye-slurry kasimende kuphelele kakhulu, isakhiwo senethiwekhi singaphezulu. kuminyene, futhi kuthuthukisa amandla kanye nokuminyana kwesakhiwo sodaka lukasimende.

Lapho ukwehla kukakhonkolo kufana ngokuyisisekelo, ingxube enganciphisa ukusetshenziswa kwamanzi ibizwa ngokuthi i-concrete water reducer. I-ejenti yokunciphisa amanzi ihlukaniswe yaba yi-ejenti evamile yokunciphisa amanzi kanye ne-ejenti yokunciphisa amanzi esebenza kahle kakhulu. Labo abanezinga lokunciphisa amanzi elingaphansi noma elilingana no-8% babizwa ngokuthi abanciphisi bamanzi abavamile, kanti labo abanezinga lokunciphisa amanzi elingaphezu kuka-8% babizwa ngokuthi izinciphisi zamanzi ezisebenza kahle kakhulu. Ngokusho kwemiphumela ehlukene i-superplasticizers engayiletha kukhonkolo, ihlukaniswe ngama-superplasticizers wamandla okuqala kanye nama-superplasticizers afaka umoya.

Ngokwethula umsebenzi wokwengeza i-ejenti yokunciphisa amanzi ku-ejenti yokwelapha uphawu, siyiqonda ngokucacile inkinga yokwengeza i-ejenti yokunciphisa amanzi ekwakhiweni kwe-ejenti yokwelapha izimpawu. Ngamagama alula, indima ye-ejenti yokunciphisa amanzi i-ejenti esebenzayo engaphezulu, engenza izinhlayiya ze-samente zilethe i-electrode efanayo, futhi zikhulule amanzi phakathi kwezinhlayiya ngokusebenzisa izakhiwo ezibonakalayo zokuxoshwa okufanayo kwecala, ngaleyo ndlela kuncishiswe amanzi.