Umhla wokuPoswa:20,Feb,2023
Yintoni iarhente yokunciphisa amanzi?
I-arhente yokunciphisa amanzi, eyaziwa ngokuba yi-dispersant okanye i-plasticizer, yeyona nto isetyenziswa kakhulu kwaye iyimfuneko kwi-concrete edibeneyo edibeneyo.Ngenxa ye-adsorption kunye nokusasazwa kwayo, ukumanzisa kunye neziphumo ezityibilikayo, inokunciphisa kakhulu ukusetyenziswa kwamanzi kwekhonkrithi entsha kunye nokusebenza okufanayo emva kokusetyenziswa, ngaloo ndlela iphucula kakhulu amandla, ukuqina kunye nezinye iipropathi zekhonkrithi.
I-arhente yokunciphisa amanzi inokwahlulwa ibe ziindidi ezimbini ngokwesiphumo sayo sokunciphisa amanzi: i-arhente yokunciphisa amanzi aqhelekileyo kunye ne-agent ephezulu yokunciphisa amanzi.I-arhente yokunciphisa amanzi inokudityaniswa kunye nezinye ii-admixtures ukwenza uhlobo lwamandla okuqala, uhlobo oluqhelekileyo, uhlobo lwe-retarding kunye ne-air entraining uhlobo lokunciphisa amanzi ngokweemfuno zobunjineli kwisicelo.
Izinto zokunciphisa amanzi zinokwahlulwa zibe lignosulfonate kunye nezinto eziphuma kuyo, iityuwa ze-polycyclic aromatic sulfonic acid, iityuwa ze-resin ezinyibilikayo ze-sulfonic acid, i-aliphatic sulfonic acid salts, ii-polyols eziphezulu, iityuwa ze-hydroxy carboxylic acid, i-polyol complexes, i-polyoxyethylene ethers kunye ne-derivatives yazo. amacandelo aphambili ekhemikhali.
Yintoni indlela yokusebenza yesinciphisi samanzi?
Zonke ii-agent zokunciphisa amanzi zi-ejenti ezisebenza phezulu.Isiphumo sokunciphisa amanzi se-arhente yokunciphisa amanzi sibonwa ngokukodwa ngumsebenzi ongaphezulu we-arhente yokunciphisa amanzi.Eyona ndlela iphambili yokwenza isinciphisi samanzi ngolu hlobo lulandelayo:
I-1) Umnciphisi wamanzi uya kubhengeza kwi-interface e-slid-liquid interface, ukunciphisa ukunyanzeliswa komhlaba, ukuphucula ubumanzi bomhlaba weengqungquthela ze-samente, ukunciphisa ukungazinzi kwe-thermodynamic ye-cement dispersion, kwaye ngaloo ndlela ufumane ukuzinza okuhambelanayo.
I-2) Umnciphisi wamanzi uya kuvelisa i-adsorption ye-directional kwi-surface ye-cement particles, ukwenzela ukuba umphezulu we-cement particles ube nentlawulo efanayo, ukuvelisa i-electrostatic repulsion, ngaloo ndlela ukutshabalalisa isakhiwo se-flocculated se-cement particles kunye nokusabalalisa i-cement particles.Kwi-polycarboxylate kunye ne-sulfamate superplasticizers, i-adsorption ye-superplasticizer ikwimo yeringi, ucingo kunye negiya, ngaloo ndlela inyusa umgama phakathi kwamasuntswana esamente ukuvelisa i-electrostatic repulsion, ebonisa ukusasazwa okungcono kunye nokugcinwa kwe-slump.
I-3) Ifilimu yamanzi ehlanjululweyo yenziwe ngombutho we-hydrogen bond phakathi kokunciphisa amanzi kunye neamolekyu zamanzi ukuvelisa ukukhuselwa kwendawo, ukuthintela ukudibanisa ngokuthe ngqo kweengqungquthela zesamente kunye nokuthintela ukubunjwa kwesakhiwo esidibeneyo.
I-4) Njengoko i-adsorption layer yenziwe phezu kweengqungquthela ze-samente, inokuthintela i-hydration yokuqala ye-samente, ngaloo ndlela ikhulise umthamo wamanzi wamahhala kunye nokuphucula ubuninzi be-cement paste.
I-5) Amanye ama-agent okunciphisa amanzi aya kwazisa umlinganiselo othile we-bubbles encinci ukunciphisa i-friction phakathi kwamaqhekeza e-samente, ngaloo ndlela kuphuculwe ukusasazeka kunye nokuzinza kwe-sement slurry.
Ixesha lokuposa: Feb-20-2023