N'ime ngwa agha agwakọtara agwakọta, ntakịrị ntakịrị cellulose ether nwere ike imeziwanye arụmọrụ nke ngwa agha mmiri. Enwere ike ịhụ na cellulose ether bụ ihe mgbakwunye bụ isi nke na-emetụta arụ ọrụ nke ngwa agha. Ịhọrọ cellulose ethers dị iche iche, dị iche iche viscosities, dị iche iche urughuru nha, dị iche iche viscosity degrees na agbakwunyere ichekwa nwekwara mmetụta dị iche iche na-emeziwanye arụmọrụ nke akọrọ ngwa agha. Ka ọ dị ugbu a, ọtụtụ ngwa agha masonry na plasta nwere ihe eji ejide mmiri adịghị mma. Mmiri slurry ga-ekewa ma hapụ ya naanị nkeji ole na ole. Ya mere, ọ dị ezigbo mkpa ịgbakwunye cellulose ether na ciment mortar. Ka anyị leba anya nke ọma na ọrụ cellulose ether na ngwa ngwa ciment!
1.Cellulose ether-mmiri njide
Njide mmiri bụ ihe dị mkpa nke cellulose ether, ọ bụkwa ihe onwunwe nke ọtụtụ ndị na-emepụta ihe ọkụkụ na-ekpo ọkụ na-ekpo ọkụ, karịsịa ndị nọ na mpaghara ndịda nke nwere okpomọkụ dị elu, na-aṅa ntị. Na mmepụta nke ihe owuwu ụlọ, karịsịa akọrọ-mix mortar, cellulose ether na-arụ ọrụ na-enweghị atụ, karịsịa n'ịmepụta ngwa agha pụrụ iche (mgbochi a gbanwere), ọ bụ ihe dị mkpa na ihe dị mkpa.
The viscosity, usoro onunu ogwu, ambient okpomọkụ na molekụla Ọdịdị nke cellulose ether nwere nnukwu mmetụta na ya ọrụ njigide mmiri. N'okpuru otu ọnọdụ ahụ, ka viscosity nke cellulose ether dị ukwuu, ka mma na-ejigide mmiri; dị elu nke usoro onunu ogwu, ka mma na-ejigide mmiri. Na-emekarị, obere ego nke cellulose ether nwere ike ime ka ọnụ ọgụgụ mmiri na-ejide mmiri dịkwuo mma. Mgbe usoro onunu ogwu rutere n'ogo ụfọdụ, usoro nke ịba ụba nke njide mmiri na-ebelata; njide mmiri nke cellulose ether na-emekarị ka ọ na-ebelata na mmụba nke ọnọdụ okpomọkụ, ma ụfọdụ cellulose ethers gbanwetụrụ nwekwara ezigbo njigide mmiri n'okpuru ọnọdụ okpomọkụ dị elu; cellulose ethers nwere akara ngbanwe dị ala nwere arụmọrụ njigide mmiri ka mma.
Otu hydroxyl dị na cellulose ether molecules na oxygen atoms na ether bonds ga-eme ka njikọ hydrogen na mkpụrụ ndụ mmiri, na-atụgharị mmiri n'efu n'ime mmiri agbụ, si otú ahụ na-arụ ọrụ dị mma na njide mmiri; mgbasa ozi dị n'etiti mkpụrụ ndụ mmiri na cellulose ether molecular chains na-enye ohere ka mkpụrụ ndụ mmiri banye n'ime ime cellulose ether macromolecular chain ma na-edo onwe ya n'okpuru mgbochi siri ike, si otú a na-akpụ mmiri n'efu na mmiri gbakọtara, si otú a na-eme ka njigide mmiri nke ciment slurry; cellulose ether mma rheological Njirimara, porous netwọk Ọdịdị na osmotic mgbali nke ọhụrụ ciment slurry, ma ọ bụ ihe nkiri-akpụ Njirimara nke cellulose ether egbochi mgbasa nke mmiri.
2.Cellulose ether-thickening na thixotropy
Cellulose ether na-enye mmiri mmiri mmiri viscosity magburu onwe ya, nke nwere ike ime ka njikọ dị n'etiti ngwa agha mmiri na oyi akwa dị elu dịkwuo elu, ma melite ọrụ mgbochi sag nke ngwa agha ahụ. A na-eji ya eme ihe na plasta ngwa agha, ngwa agha tile bonding na sistem mkpuchi mgbidi mpụta. The ndim mmetụta nke cellulose ether nwekwara ike dịkwuo dispersion eguzogide na homogeneity nke ọhụrụ ihe, gbochie ihe delamination, segregation na ọbara ọgbụgba, na ike ga-eji na eriri ihe, n'okpuru mmiri ihe na onwe compacting ihe.
Mmetụta siri ike nke cellulose ether na ihe ndị dabeere na ciment sitere na viscosity nke cellulose ether ngwọta. N'okpuru otu ọnọdụ ahụ, ka viscosity nke cellulose ether dị elu, ka mma viscosity nke ihe eji eme ciment gbanwere. Otú ọ dị, ọ bụrụ na viscosity dị elu, ọ ga-emetụta mmiri na ịrụ ọrụ nke ihe onwunwe (dị ka ịrapagidesi ike na mma plasta). Mgbọ ndị na-edozi onwe ha na ihe ndị na-emepụta ihe na-achọ ka mmiri dị elu chọrọ obere viscosity nke cellulose ether. Tụkwasị na nke ahụ, mmetụta na-eme ka ọkpụkpụ cellulose ethers na-eme ka mmiri na-achọ ihe ndị dabeere na ciment ma na-amụba ngwa ngwa.
Nnukwu viscosity cellulose ether aqueous ngwọta nwere thixotropy dị elu, nke bụkwa isi njirimara cellulose ether. Aqueous ngwọta nke methylcellulose n'ozuzu nwere pseudoplastic, na-abụghị thixotropic eruba Njirimara n'okpuru ha gel okpomọkụ, ma na-egosipụta Newtonian eruba Njirimara na ala shiee ọnụego. Pseudoplasticity na-abawanye na mmụba nke molekụla arọ ma ọ bụ itinye uche nke cellulose ether, n'agbanyeghị ụdị na ogo nke nnọchi nke nnọchi. Ya mere, cellulose ethers nke otu viscosity ọkwa, ma MC, HPMC, ma ọ bụ HEMC, ga-mgbe niile na-egosipụta otu rheological Njirimara ma ọ bụrụhaala na ịta na okpomọkụ na-na-na-adịgide adịgide. Mgbe okpomọkụ na-abawanye, a na-emepụta gel nhazi na nnukwu thixotropic eruba na-eme.
Ọnụ ọgụgụ dị elu na obere viscosity cellulose ethers na-egosipụta thixotropy ọbụna n'okpuru okpomọkụ gel. Ngwongwo a bara uru nke ukwuu n'imeziwanye ihe nrịbama na ihe na-adighi nma nke ulo ogwu n'oge owuwu. Ekwesiri iburu n'uche ebe a na elu viscosity nke cellulose ether, mma njigide mmiri, ma elu viscosity, elu nke ikwu molekul arọ nke cellulose ether, na solubility na-ebelata otú ahụ, nke nwere mmetụta ọjọọ na ya. na ngwa agha ịta na ịrụ ọrụ ihe owuwu.
3.Cellulose ether-ikuku mmetụta mmetụta
Cellulose ether nwere mmetụta dị ịrịba ama nke ikuku ikuku na ihe ndị dabeere na ciment ọhụrụ. Cellulose ether nwere ma hydrophilic otu (hydroxyl otu, ether otu) na hydrophobic otu (methyl otu, glucose mgbanaka). Ọ bụ surfactant nwere ọrụ elu ma si otú ahụ nwee mmetụta ntinye ikuku. Mmetụta ikuku nke cellulose ether ga-emepụta mmetụta "bọọlụ", nke nwere ike imeziwanye arụmọrụ nke ihe ndị a gwakọtara ọhụrụ, dị ka ịba ụba plasticity na ire ụtọ nke ngwa agha n'oge ọrụ, nke bara uru na paving nke ngwa agha; ọ ga-abawanye mmepụta nke ngwa agha ma belata ọnụahịa mmepụta nke ngwa agha; ma ọ ga-eme ka porosity nke ihe ndị siri ike na-eme ka ọ dịkwuo elu ma belata ihe eji arụ ọrụ ha dị ka ike na mgbanwe modulus.
Dị ka a surfactant, cellulose ether nwekwara a wetting ma ọ bụ lubricating mmetụta na simenti irighiri, nke ọnụ ya ikuku entraning mmetụta na-eme ka fluidity nke simenti dabeere n'ihe, ma ya ndim mmetụta ga-ebelata fluidity. Mmetụta nke cellulose ether na mmiri mmiri nke ihe ndị dabeere na ciment bụ nchikota nke plasticization na ndim mmetụta. N'ikwu okwu n'ozuzu, mgbe usoro ọgwụgwọ cellulose ether dị ntakịrị, ọ na-egosipụtakarị dị ka plasticizing ma ọ bụ mmetụta na-ebelata mmiri; mgbe usoro onunu ogwu dị elu, mmetụta nke cellulose ether na-ebuwanye ibu ngwa ngwa, yana mmetụta ikuku ikuku ya na-eme ka saturation, ya mere ọ na-egosipụta dị ka mmetụta na-egbuke egbuke ma ọ bụ ụbara mmiri.
4.Cellulose ether-retarding mmetụta
Cellulose ether ga-agbatị oge ntọala nke ciment mado ma ọ bụ ngwa agha na-egbu oge na ciment hydration Dynamic, nke bara uru na-amụba operability oge nke ọhụrụ mix ihe ma melite oge na-adabere ọnwụ nke ngwa agha agbanwe agbanwe na ihe slump, ma ọ nwekwara ike. na-egbu oge ọganihu ihe owuwu ahụ.
Oge nzipu: Sep-24-2024