Ekwakhekeni kodaka oluyimpuphu eyomile,i-cellulose etheriyisengezo esibalulekile esinenani eliphansi lokwengeza, kodwa ingathuthukisa kakhulu ukusebenza kokuxuba nokwakha kwe-mortar. Kalula nje, cishe zonke izakhiwo zokuxuba ezimanzi ze-mortar ezingabonakala ngeso lenyama zinikezwa yi-cellulose ether. Kuyi-cellulose derivative etholakala ngokusebenzisa i-cellulose eyenziwe ngokhuni kanye nekotini, isabela nge-caustic soda, bese i-etherifying nge-ejenti etherifying.
Izinhlobo ze-cellulose ethers
A. I-Hydroxypropyl methyl cellulose (HPMC), eyenziwe kakhulu ngokotini ocwengisiswe ngobumsulwa obukhulu njengezinto zokusetshenziswa, ishiswa ngokukhethekile ngaphansi kwezimo ze-alkaline.
B. I-Hydroxyethyl methylcellulose (HEMC), i-non-ionic cellulose ether, inombala omhlophe okhanyayo, ayinaphunga futhi ayinambitheki.
C. I-Hydroxyethyl cellulose (HEC), i-surfactant engeyona i-ionic, emhlophe ngokubukeka, ayinaphunga, ayinambitheki futhi iphuphu eligeleza kalula.
Okungenhla yi-non-ionic cellulose ethers, kanye ne-ionic cellulose ethers (njenge-carboxymethyl cellulose CMC).
Ngesikhathi sokusetshenziswa kodaka oluyimpuphu eyomile, ngoba i-ionic cellulose (CMC) ayizinzile uma kukhona ama-ion e-calcium, ayisetshenziswa kakhulu ezinhlelweni ze-gelling ezingaphili ngesamente kanye ne-slaked lime njengezinto zokufaka usimende. Kwezinye izindawo eShayina, amanye ama-putty odongeni angaphakathi acutshungulwa ngesitashi esiguquliwe njengezinto eziyinhloko zokufaka usimende kanye ne-Shuangfei powder njenge-filler asebenzisa i-CMC njenge-thickener. Kodwa-ke, ngoba lo mkhiqizo uthambekele ekukhunteni futhi awumelani namanzi, ususwa kancane kancane yimakethe. Njengamanje, i-cellulose ether esetshenziswa kakhulu eShayina yi-HPMC.
I-Cellulose ether isetshenziswa kakhulu njenge-ejenti yokugcina amanzi kanye ne-thickener ezintweni ezisekelwe kusimende
Umsebenzi wayo wokugcina amanzi ungavimbela i-substrate ekumunceni amanzi amaningi futhi uvimbele ukuhwamuka kwamanzi, ukuze kuqinisekiswe ukuthi i-simende inamanzi anele uma imanzi. Thatha umsebenzi wokuplasta njengesibonelo. Uma kufakwa i-slurry evamile ye-simende ebusweni besisekelo, i-substrate eyomile nenezimbobo izomunca ngokushesha inani elikhulu lamanzi kusuka ku-slurry, kanti ungqimba lwe-slurry ye-simende eduze nongqimba lwesisekelo luzolahlekelwa kalula amanzi adingekayo ukuze kumanziswe. , ngakho-ke akugcini nje ngokukwazi ukwakha ijeli ye-simende enamandla okubopha ebusweni be-substrate, kodwa futhi ithambekele ekugobekeni nasekuphumeni kwamanzi, ukuze ungqimba lwe-slurry ye-simende engaphezulu lube lula ukuwa. Uma i-grout esetshenziswayo incane, kulula futhi ukwakha imifantu kuyo yonke i-grout. Ngakho-ke, esikhathini esidlule sokuplasta kwe-surface, amanzi avame ukusetshenziswa ukumanzisa i-substrate kuqala, kodwa lo msebenzi awudingi nje kuphela umsebenzi omningi futhi udla isikhathi, kodwa futhi nekhwalithi yokusebenza kunzima ukuyilawula.
Ngokuvamile, ukugcinwa kwamanzi kwe-slurry yesimende kuyanda ngokwanda kokuqukethwe kwe-cellulose ether. Uma i-viscosity ye-cellulose ether eyengeziwe inkulu, ukugcinwa kwamanzi kuba ngcono.
Ngaphezu kokugcinwa kwamanzi kanye nokuqina, i-cellulose ether ithinta nezinye izakhiwo ze-cement mortar, njengokulibazisa, ukucindezela umoya, kanye nokwandisa amandla e-bond. I-Cellulose ether yehlisa ijubane lenqubo yokubeka kanye nokuqina kwe-cement, ngaleyo ndlela yandise isikhathi sokusebenza. Ngakho-ke, ngezinye izikhathi isetshenziswa njenge-coagulant.
Ngokuthuthukiswa kodaka oluxutshwe okomile,i-cellulose ethersekuyinto ebalulekile exutshwe ngodaka lukasimende. Kodwa-ke, kunezinhlobo eziningi kanye nemininingwane ye-cellulose ether, futhi ikhwalithi phakathi kwamaqoqo isashintshashintsha.
Isikhathi sokuthunyelwe: Ephreli-25-2024