Indlela yokuphucula ukusebenza kweConcrete?

Ngokuthelekisa uvavanyo, ukongezwa kwe-ether ye-cellulose kunokuphucula kakhulu ukusebenza kwekhonkrithi eqhelekileyo kunye nokuphucula ukumpompa kwekhonkrithi empompayo. Ukufakwa kwe-cellulose ether kuya kunciphisa amandla ekhonkrithi.

Amagama angundoqo: i-cellulose ether; ukusebenza okubambekayo; ukumpompa

1.Intshayelelo

Ngophuhliso oluqhubekayo loluntu, imfuno yekhonkrithi yezorhwebo iyanda. Emva kweminyaka engaphezu kweshumi yophuhliso olukhawulezayo, ikhonkrithi yezorhwebo ingene kwinqanaba lokuqola noko. Ikhonkrithi eyohlukeneyo yorhwebo ihlangabezana neemfuno zeeprojekthi ezahlukeneyo. Nangona kunjalo, kumsebenzi wokwenyani, sifumanise ukuba xa kusetyenziswa ikhonkrithi emponthiweyo, ngokufuthi ngenxa yezizathu ezinjengokungasebenzi kakuhle kwekhonkrithi kunye nesantya sesanti engazinzanga, ilori yempompo iya kuvalelwa, kwaye ixesha elininzi kunye nabasebenzi baya kuchithwa kwindawo yokwakha. kunye nesikhululo sokuxuba, esiya kuthi sichaphazele iprojekthi. umgangatho we. Ngokukodwa kwikhonkrithi yezinga eliphantsi, ukusebenza kwayo kunye nokumpompa kubi kakhulu, kungazinzi ngakumbi, kwaye amathuba okufakwa kombhobho kunye nokuqhuma kuphezulu. Ngokuqhelekileyo, ukunyusa izinga lesanti kunye nokwandisa izinto ze-cementitious kunokuphucula imeko engentla, kodwa kuphucula umgangatho wekhonkrithi. iindleko zezinto eziphathekayo. Kwizifundo zangaphambili, kwafunyaniswa ukuba ukongezwa kwe-ether cellulose kwikhonkrithi enogwebu kuya kuvelisa inani elikhulu lamaqamza amancinci avaliweyo kumxube, okwandisa umbane wekhonkrithi, iphucula ukugcinwa kokuwa, kwaye kwangaxeshanye idlala. indima ekugcinweni kwamanzi kunye nokuncipha kudaka lwesamente. Ngoko ke, ukongeza i-cellulose ether kwikhonkrithi eqhelekileyo kufuneka ibe nefuthe elifanayo. Okulandelayo, ngokusebenzisa iimvavanyo, phantsi kwesiseko somlinganiselo wokuxuba rhoqo, inani elincinci le-ether ye-cellulose yongezwa ukujonga ukusebenza komxube, ukulinganisa ubuninzi bobuninzi obumanzi, kunye nokuvavanya amandla oxinzelelo lwekhonkrithi 28d. Oku kulandelayo yinkqubo kunye neziphumo zovavanyo.

2. Linge

2.1 Vavanya imathiriyeli ekrwada

(1) Isamente yiYufeng brand PO42.5 isamente.

(2) I-admixtures yamaminerali esebenzayo esetyenziswayo yiLaibin Power Plant Class II fly ash kunye neYufeng S75 class powder powder.

(3) I-aggregate edibeneyo yintlabathi eyenziwe ngumatshini we-limestone eveliswa yi-Guangxi Yufeng Concrete Co., Ltd., kunye ne-fineness modulus ye-2.9.

(4) I-aggregate erhabaxa yi-5-25 mm yekalika esemgangathweni eqhubekayo eveliswe yiYufeng Blasting Company.

(5) Isinciphisi samanzi yi-polycarboxylate esebenza ngokufanelekileyo yokunciphisa amanzi i-AF-CB eveliswe yiNanning Nengbo Company.

(6) I-cellulose ether yi-HPMC eveliswe yi-Kima Chemical Co., Ltd, kunye ne-viscosity ye-200,000.

2.2 Indlela yovavanyo kunye nenkqubo yovavanyo

(1) Ngaphantsi kwesiseko sokuba umlinganiselo wokubopha amanzi kunye nomlinganiselo wesanti uhambelana, qhuba iimvavanyo ngeendlela ezahlukeneyo zokuxuba, ukulinganisa ukuhla, ukuwa kwexesha elide, kunye nokwandiswa komxube omtsha, ukulinganisa ubuninzi besampulu nganye, kwaye qwalasela umlinganiselo wokuxuba. Ukusebenza kwezinto eziphathekayo kunye nokwenza irekhodi.

(2) Emva kovavanyo lwe-slump loss for 1 iyure, umxube wesampuli nganye uphinde waxutywa ngokulinganayo kwaye ulayishwe kumaqela e-2 ngokulandelanayo, kwaye uphilise iintsuku ze-7 kunye neentsuku ze-28 phantsi kweemeko eziqhelekileyo.

(3) Xa iqela le-7d lifikelela kwiminyaka yobudala, qhuba uvavanyo lokuqhawula ukufumana ubudlelwane phakathi kwe-dosage kunye namandla e-7d, kwaye ufumane ixabiso le-dosage x kunye nokusebenza kakuhle komsebenzi kunye namandla aphezulu.

(4) Sebenzisa i-dosage x ukwenza iimvavanyo eziphathekayo kunye neelebhile ezahlukeneyo, kwaye uthelekise amandla eesampuli ezingenanto ezihambelanayo. Fumana ukuba angakanani amandla ekhonkrithi amabakala ahlukeneyo achatshazelwa yi-cellulose ether.

2.3 Iziphumo zovavanyo kunye nohlalutyo

(1) Ngexesha lovavanyo, jonga imeko kunye nokusebenza komxube omtsha weesampulu ezinamathamo ahlukeneyo, kwaye uthathe imifanekiso yeerekhodi. Ukongeza, inkcazo yokusebenza kukarhulumente kunye nokusebenza kwesampulu nganye yomxube omtsha nayo irekhodwa.

Ukudibanisa urhulumente kunye nokusebenza komxube omtsha weesampuli kunye needosi ezahlukeneyo kunye nenkcazo yelizwe kunye neempawu zomxube omtsha, kunokufunyanwa ukuba iqela elingenanto ngaphandle kwe-ether ye-cellulose inokusebenza ngokubanzi, ukopha kunye ne-encapsulation embi . Xa i-cellulose ether yongezwa, zonke iisampuli zazingenayo into yokopha, kwaye ukusebenza kwaphuculwa kakhulu. Ngaphandle kwesampulu ye-E, amanye amaqela amathathu ane-fluidity enhle, ukwanda okukhulu, kwaye kulula ukupompa nokwakha. Xa idosi ifikelela malunga ne-1‰, umxube uba yi-viscous, iqondo lokwandiswa liyancipha, kwaye i-fluidity iphakathi. Ngoko ke, umthamo ngu-0.2‰～0.6‰, enokuphucula kakhulu ukusebenza kunye nokumpompa.

(2) Ngexesha lovavanyo, ukuxinana kobuninzi bomxube kulinganiswe, kwaye kwaphuka emva kweentsuku ze-28, kwaye imithetho ethile yafunyanwa.

Inokubonwa kubudlelwane phakathi kobuninzi bobuninzi / amandla kunye nobuninzi obukhulu / amandla omxube omtsha kunye nedosi yokuba ubuninzi bomxube omtsha buyancipha njengoko idosi ye-cellulose ether inyuka. Amandla oxinzelelo nawo ehla ngokunyuka komxholo we-cellulose ether. Iyangqinelana nekhonkrithi yogwebu efundwe nguYuan Wei.

(3) Ngokusebenzisa iimvavanyo, kufunyenwe ukuba i-dosage ingakhethwa njenge-0.2‰, engakwaziyo ukufumana ukusebenza kakuhle nje kuphela, kodwa nokuba nelahleko encinci yamandla. Emva koko, uvavanyo loyilo lwe-C15, i-C25, i-C30, i-C35 i-4 amaqela angenanto kunye namaqela angama-4 ngokulandelanayo axutywe kunye ne-0.2‰i-cellulose ether.

Jonga ukusebenza komxube omtsha kwaye uthelekise kunye nesampuli engenanto. Emva koko fakela ukungunda ukunyanga okusemgangathweni, kwaye uqhawule ukungunda kangangeentsuku ezingama-28 ukuze ufumane amandla.

Ngexesha lovavanyo, kwafunyaniswa ukuba ukusebenza kweesampulu zomxube omtsha oxutywe ne-cellulose ether kuye kwaphuculwa kakhulu, kwaye akuyi kubakho ulwahlulo okanye ukopha konke. Nangona kunjalo, imixube esezantsi ngokwentelekiso ye-C15, i-C20, kunye ne-C25 kwisampulu engenanto kulula ukwahlula kunye nokopha ngenxa yexabiso elincinci lomlotha. Amanqaku e-C30 nangaphezulu nawo aphucukile. Inokubonwa kwidatha ekuthelekiseni amandla eelebhile ezahlukeneyo ezixutywe ne-2‰i-cellulose ether kunye nesampuli engenanto yokuba amandla ekhonkrithi ayancipha ukuya kwinqanaba elithile xa i-ether ye-cellulose yongezwa, kunye nobukhulu bokuhla kwamandla kwandisa ngokunyuka kweleyibhile.

3. Isiphelo sovavanyo

(1) Ukongeza i-cellulose ether kunokuphucula ukusebenza kwekhonkrithi ephantsi kunye nokuphucula ukumpompa.

(2) Ngokudityaniswa kwe-cellulose ether, ubuninzi bekhonkrithi buyancipha, kwaye ubuninzi bexabiso, buncinci ubuninzi bobuninzi.

(3) Ukubandakanya i-cellulose ether kuya kunciphisa amandla ekhonkrithi, kwaye ngokunyuka komxholo, iqondo lokunciphisa liya kwanda.

(4) Ukongeza i-cellulose ether kuya kunciphisa amandla ekhonkrithi, kwaye ngokunyuka kwebakala, ubukhulu bokunciphisa buya kunyuka, ngoko akufanelekile ukusetyenziswa kwikhonkrithi ephezulu.

(5) Ukongeza i-cellulose ether ingasetyenziselwa ukuphucula ukusebenza kweC15, C20, kunye neC25, kwaye umphumo ufanelekile, ngelixa ukulahlekelwa kwamandla akukhulu. Inkqubo yokupompa inokunciphisa kakhulu ithuba lokuvala umbhobho kunye nokuphucula ukusebenza kakuhle.