I-Hydroxypropyl methylcellulose yi-polymer compound enyibilikayo emanzini, eyaziwa ngokuba yi-resin enyibilikayo emanzini okanye i-polymer enyibilikayo emanzini. Iyenza ibe lukhuni le ngxube ngokwandisa i-viscosity yamanzi axutywayo. Yinto ye-polymer ethanda amanzi. Inokunyibilika emanzini ukuze yenze isisombululo okanye i-dispersion. Uvavanyo lubonisa ukuba xa ubungakanani be-superplasticizer esekelwe kwi-naphthalene busanda, ukufakwa kwe-superplasticizer kuya kunciphisa i-dispersion resistance ye-samente mortar exutywe ngokutsha. Oku kungenxa yokuba i-naphthalene superplasticizer yi-surfactant. Xa i-arhente yokunciphisa amanzi yongezwa kwi-mortar, i-arhente yokunciphisa amanzi ibekwe phezu kwamasuntswana esamente, ukuze umphezulu wamasuntswana esamente ube ne-charge efanayo. Le repulsion yombane iyachitha isakhiwo se-flocculation esenziwe ngamasuntswana esamente, kwaye amanzi asongwe kwisakhiwo ayakhululwa, nto leyo ebangela ukulahleka kwenxalenye yesamente. Kwangaxeshanye, kwafunyaniswa ukuba ngokonyuka komxholo we-HPMC, i-dispersion resistance ye-samente mortar entsha iba ngcono nangakumbi.
Iimpawu zokuqina kwekhonkrithi:
Umxube wekhonkrithi ongaphantsi kwamanzi we-HPMC usetyenziswa kubunjineli besiseko sebhulorho yeendlela, kwaye inqanaba lamandla oyilo yi-C25. Ngokwesi vavanyo sisisiseko, ubungakanani besamente yi-400kg, ubungakanani be-microsilica yi-25kg/m3, ubungakanani obufanelekileyo be-HPMC yi-0.6% yesixa sesamente, umlinganiselo wamanzi nesamente yi-0.42, umlinganiselo wesanti yi-40%, kwaye imveliso ye-naphthyl superplasticizer yi-8% yesixa sesamente. , Iisampulu zekhonkrithi emoyeni kangangeentsuku ezingama-28 zinamandla aphakathi kwe-42.6MPa, kwaye ikhonkrithi egalelwe phantsi kwamanzi kangangeentsuku ezingama-28 enethontsi lamanzi elingama-60mm inamandla aphakathi kwe-36.4 MPa.
1. Ukongezwa kwe-HPMC kunempembelelo ecacileyo yokulibazisa umxube we-mortar. Njengoko umthamo we-HPMC usanda, ixesha lokuseta i-mortar liyanda kancinci kancinci. Phantsi komxholo ofanayo we-HPMC, i-mortar eyenziwe phantsi kwamanzi ingcono kune-mortar eyenziwe emoyeni. Ixesha lokuqina lokubumba lide. Olu phawu lwenza kube lula ukupompa i-concrete phantsi kwamanzi.
2. I-mortar entsha yesamente exutywe ne-hydroxypropyl methylcellulose isebenza kakuhle ekubopheleleni kwaye ayiphumi kakhulu.
3. Umxholo we-HPMC kunye nemfuno yamanzi kwi-mortar yehle kuqala yaza yanda kakhulu.
4. Ukufakwa kwesixhobo sokunciphisa amanzi kuphucula ingxaki yokwanda kwemfuno yamanzi kwi-mortar, kodwa kufuneka ilawulwe ngokufanelekileyo, kungenjalo ngamanye amaxesha kuya kunciphisa ukumelana nokusasazeka kwamanzi kwi-mortar esandula ukuxutywa nesamente.
5. Akukho mahluko mkhulu kwisakhiwo sesampuli yentlama yesamente exutywe ne-HPMC kunye nesampuli engenanto, kwaye akukho mahluko mkhulu kwisakhiwo kunye nobuninzi besampuli yentlama yesamente ekugaleleni amanzi nomoya. Isampuli eyenziwe emva kweentsuku ezingama-28 phantsi kwamanzi ikhululekile kancinci. Isizathu esiphambili kukuba ukongezwa kwe-HPMC kunciphisa kakhulu ukulahleka kunye nokusasazeka kwesamente ngexesha lokugalela amanzi, kodwa kukwanciphisa ukuxinana kwelitye lesamente. Kwiprojekthi, ubungakanani be-HPMC kufuneka buncitshiswe kangangoko kunokwenzeka ngelixa kuqinisekiswa isiphumo sokungasasazeki phantsi kwamanzi.
6. Ukudibanisa i-HPMC phantsi kwamanzi kunye nekhonkrithi engasasazekayo, ulawulo lobungakanani lunceda ekuphuculeni amandla. Iiprojekthi zovavanyo zibonise ukuba ikhonkrithi eyenziwe emanzini inomlinganiselo wamandla we-84.8% waleyo yenziwe emoyeni, kwaye isiphumo sibaluleke ngakumbi.
Ixesha lokuthumela: Juni-16-2023