Ukumelana nokusasazeka luphawu olubalulekileyo lobugcisa lokulinganisa umgangatho we-anti-dispersant.I-Hydroxypropyl methyl celluloseyi-polymer compound enyibilikayo emanzini, eyaziwa ngokuba yi-resin enyibilikayo emanzini okanye i-polymer enyibilikayo emanzini. Yonyusa ukuhambelana komxube ngokunyusa i-viscosity yamanzi axutywayo. Luhlobo lwezinto ze-polymer eziphila emanzini, ezinokunyibilika emanzini kwaye zenze isisombululo okanye ulwelo olusasazekayo. Uvavanyo lubonisa ukuba xa ubungakanani be-superplasticizer yenkqubo ye-naphthalene busanda, ukongezwa kwe-superplasticizer kuya kunciphisa ukumelana nokusasazeka kwe-mortar entsha yesamente. Oku kungenxa yokuba i-arhente yokunciphisa amanzi esebenza kakuhle ye-naphthalene series iyinxalenye ye-arhente esebenzayo kumphezulu, xa i-arhente yokunciphisa amanzi yongezwa kwi-mortar, i-arhente yokunciphisa amanzi kumphezulu we-particle yesamente ejolise kumphezulu wee-particle zesamente enetshaja efanayo, isakhiwo se-flocculation sombane se-particles zesamente esenziwe ngokwahlulahlula, ukugoqa kwisakhiwo sokukhululwa kwamanzi, kuya kubangela ukulahleka kwenxalenye yesamente. Kwangaxeshanye, kufunyaniswe ukuba ngokonyuka komxholo we-HPMC, i-anti dispersion ye-mortar entsha yesamente ingcono kwaye ingcono.
Iimpawu zokuqina kwekhonkrithi:
Umxube wekhonkrithi ongaphantsi kwamanzi we-HPMC wasetyenziswa kubunjineli besiseko sebhulorho yendlela enkulu, kwaye umgangatho wamandla oyilo yayiyi-C25. Emva kovavanyo olusisiseko, umthamo wesamente yi-400kg, i-compound mixed silica fume yi-25kg/m3,I-HPMCUmlinganiselo ofanelekileyo yi-0.6% yomlinganiselo wesamente, umlinganiselo wesamente yamanzi yi-0.42, izinga lesanti yi-40%, i-naphthalene esebenza kakuhle kakhulu isivuno se-arhente yokunciphisa amanzi yi-8% yomlinganiselo wesamente, isampuli yesamente emoyeni yi-28d, amandla aphakathi yi-42.6MPa, Amandla aphakathi ekhonkrithi egalelwe phantsi kwamanzi enokuphakama okuhlayo kwe-60mm emanzini yi-36.4mpa kangangeentsuku ezingama-28, kwaye umlinganiselo wamandla ekhonkrithi eyenziwe emanzini kunye nekhonkrithi eyenziwe emoyeni yi-84.8%, ebonisa impembelelo ebalulekileyo.
1. Ukongezwa kwe-HPMC kunempembelelo ecacileyo yokulibazisa umxube we-mortar. Njengoko umthamo we-HPMC wonyuka, ixesha lokuseta i-mortar liyanda ngokulandelelana. Phantsi kwemeko efanayo ye-HPMC dosage, ixesha lokuseta i-mortar engaphantsi kwamanzi lide kunelo lomoya. Olu phawu luluncedo ekupompeni i-concrete engaphantsi kwamanzi.
2, xa ixutywe ne-hydroxypropyl methyl cellulose yodaka lwesamente entsha, idibene kakuhle, phantse akukho nto ibangela ukopha.
3, idosi ye-HPMC kunye nemfuno yamanzi edaka kuqala yehla yaza yanda kakhulu.
4. Ukufakwa kwesinciphisi samanzi kuphucula ingxaki yokwanda kwemfuno yamanzi kwi-mortar, kodwa kufuneka ilawulwe ngokufanelekileyo, kungenjalo ngamanye amaxesha kuya kunciphisa ukumelana nokusasazeka kwamanzi kwi-mortar entsha yesamente.
5. Akukho mahluko mkhulu kwisakhiwo phakathi kweesampuli zesamente ezixutyiweyo zesamente kunye neesampuli ezingenanto, kwaye akukho mahluko mkhulu kwisakhiwo kunye nobuncinci phakathi kweesampuli zesamente ezithululwe ngamanzi kunye neesampuli zesamente ezithululwe ngomoya. Isampuli yokubumba engaphantsi kwamanzi engama-28d ikhululekile kancinci. Isizathu esiphambili kukuba ukongezwa kwe-HPMC kunciphisa kakhulu ukulahleka kunye nokusasazeka kwesamente ngexesha lokugalelwa kwamanzi, kodwa kunciphisa nomlinganiselo wokuxinana kwesamente. Kwiprojekthi, phantsi kwemeko yokuqinisekisa isiphumo sokungasasazeki phantsi kwamanzi, ubungakanani bokuxuba be-HPMC buncitshiswa kangangoko kunokwenzeka.
6, yongezaI-HPMCphantsi kwamanzi ayisasazi umxube wekhonkrithi, ilawula ubungakanani bamandla alungileyo, iprojekthi yovavanyo ibonisa ukuba umlinganiselo wamandla okwenza ikhonkrithi emanzini nokwenziwa emoyeni yi-84.8%, umphumo ubaluleke ngakumbi.
Ixesha leposi: Epreli-25-2024