Izongezo zeConcrete eziKhala | Ii-Agents eziFoaming eziSebenza ngokuPhezulu kwiSellula Concrete
Hydroxypropyl Methylcellulose, okanye HPMC, ngumxube we-ether cellulose ophucula ngokusisiseko iipropathi ze-fresh-state ze isamente nikezela ngokusebenza njengogcino lwamanzi olunamandla kunye nokuqina. Olu tshintsho lwekhemikhali luguqula udaka olulula ukusuka kumxube othambekele ekulahlekeni kwamanzi ngokukhawuleza kunye nesicelo esiqinileyo sibe yinto enokucoleka., ehlangeneyo, kunye nezinto ezisebenzisekayo ezibambelela ngokufanelekileyo kwiindawo ezithe nkqo. Yeekontraka kunye nabaqulunqi, ukuqonda i-HPMC kubalulekile ekufezekiseni okufanayo, ukugqiba umgangatho ophezulu kunye nokunciphisa umgudu wabasebenzi kunye nenkunkuma yezinto eziphathekayo.
Indlela engundoqo: Ukugcinwa kwamanzi ngefilimu yeColloidal
Embindini wayo, HPMC isebenza ngokulawula ngokwasemzimbeni amanzi ngaphakathi kwimatrix yesamente. Xa udibana namanzi, iimolekyuli zayo ze-polymer ezinde-chain zi-hydrate kunye ne-uncoil, ukudala inethiwekhi ye-colloidal ekhuselayo. Le nethiwekhi ibamba ngokufanelekileyo iimolekyuli zamanzi zamahhala. Xa ixutywe kwi unikezelo lwesamente, esi senzo sinciphisa kakhulu izinga lokunyuka kwamanzi abe ngumphunga kwiisubstrates ezinamathambo kunye nomoya. Amanzi agciniweyo ahlala ekhona kwabo babalulekileyo inkqubo ukuhanjiswa kwesamente ixesha elide. Kwimeko, I-HPMC yenza uvimba wokusebenza, ukuthintela ukuqina kwangaphambi kwexesha okwenziwa sisibetho kuxutywe namanzi alula. A 2018 ingxelo yoshishino yiGlobal Mortar Additives Consortium ilinganise esi siphumo, ukuqaphela ukuba izongezo ze-HPMC eziqhelekileyo zinokunyusa amaxabiso ogcino lwamanzi ukusuka ngezantsi 75% ukuya ngaphaya 95%, njengoko kulinganiswa ngendlela yephepha lokucoca.
Iimpembelelo ezibambekayo ekuBonelweni kokuSebenza kunye neSicelo
Abagciniweyo amanzi iguqulela ngokuthe ngqo kuphuculo olunokulinganiswa ekusebenzeni kwe-trowel. Eyokuqala yiplastiki ephuculweyo. Udaka luba yibhotolo, ukuyivumela ukuba isasazeke ngokulula ngaphandle kokukrazula okanye ukurhuqa. Isibini, ifumana umanyano. Oku kuthetha ukuba amasuntswana esanti abanjwe ngokunqunyanyiswa, ukuthintela ukwahlukana kunye nokopha. Okubaluleke kakhulu kwisicelo esithe nkqo, lo mzimba ubambeneyo unciphisa kakhulu ukudodobala. Unikezelo oluxutywe ne-HPMC lubambelela eludongeni, ukuvumela abafaki-zicelo benze iileya ezityebileyo kwipasi enye. Abafaki-zicelo abangamagqala bahlala bechaza umahluko njengo “ubusuku nemini.” Njengomtyabi obalaseleyo uJames Kowalski waphawula kudliwanondlebe lwejenali yorhwebo, “Unikezelo olwenziwe ngokufanelekileyo kunye ne-HPMC lukunika ixesha elivulekileyo elongezelelweyo. Awubaleki ngokuchasene newotshi, into ethetha ukuba ungagxila ekuphumezeni iflethi egqibeleleyo, ukugqiba izixhobo ngaphandle koloyiko.” Oku kwandisa ixesha lokuvula, rhoqo 30 ukuya 90 imizuzu ubude ngokuxhomekeke ithamo kunye neemeko ambient, sisiphumo esithe ngqo se-hydration elawulwayo.
Umthamo osebenzayo, Ukuxuba, kunye neNgqwalasela yeNtsebenziswano
| IBanga leViscosity (mPa·s) | Umthamo oqhelekileyo (% ye-binder) | Isiphumo esiPhambili kuNikezo |
|---|---|---|
| 400 – 4,000 | 0.1 – 0.2% | Ukuphucula ukusebenza kunye nokugcinwa kwamanzi kunye nokunyuka okuncinci kwe-viscosity. |
| 10,000 – 20,000 | 0.2 – 0.3% | Ukulungelelaniswa kokusebenza kunye nokuxhathisa i-sag kunikezelo oluthe nkqo jikelele. |
| 60,000 – 100,000 | 0.3 – 0.5% | Ubumbano oluphezulu kunye ne-anti-sag yokutyeba, izicelo zengubo enye okanye umsebenzi ongaphezulu. |
I-HPMC iyahambelana ngokubanzi nolunye unikezelo oluqhelekileyo imixube, kodwa intsebenziswano ikhona. Isebenza ngokubambisana kunye ne-air-entraining agents ukuphucula ukuqina kwe-frize-thaw kunye neplastiki. Xa isetyenziswe kunye ne-superplasticizers (izinciphisi zamanzi ezinoluhlu oluphezulu), udibaniso olulandelelanayo luhlala lungcono: yongeza i-superplasticizer kumanzi okuxuba kuqala ukuze usasaze, emva koko udibanise i-HPMC-dry mix. Urhwebo oluphambili lulibaziseko olunokubakho ekubekeni ixesha kunye nophuhliso lwamandla kwangethuba. Oku kulawulwa, hayi ukonakalisa, isiphumo. I-render ifumana amandla aneleyo aluhlaza ukuxhathisa ukuphatha umonakalo, ngelixa amandla okugqibela onyango engaphazamiseki. Inyaniso, Ukuhanjiswa kwamanzi okuphuculweyo kudla ngokukhokelela kumandla aphezulu aphezulu xa kuthelekiswa nonikezelo apho amanzi aba ngumphunga phambi kwexesha.
Iindleko-iNzuzo kunye noMgangatho woBoniso wokuGqibela
Yeekontraka, ubalo luthe ngqo. Ukongeza i-HPMC yonyusa iindleko zezinto zodaka ngomda omncinci. Ezi ndleko zihlawulelwa amaxesha amaninzi ngenxa yeenzuzo ezisebenzayo-ukusebenza ngokukhawuleza, ukusebenza kwakhona okuncinci, kunye nokunciphisa inkunkuma yezinto eziphathekayo ukusuka kwi-sagging okanye iibhetshi ezikhatywayo. Unikezelo oluqinileyo lokugqibela lubonisa umgangatho ophezulu: kuncitshiswe kakhulu ukushwabana kweplastiki ngenxa yokwabiwa kokufuma, amandla okubopha okuphuculweyo ukusuka kwi-substrate engcono yokumanzisa kunye nokubambelela, kunye ne-denser, indawo egudileyo efuna umzamo omncinci wokugqiba. Le ndlela yokusebenzela iphezulu kakhulu kunenkqubo yakudala yokongeza nje ukugqithisa amanzi ukuphucula ukusebenza, indlela eqinisekisa ubuthathaka, ezinemingxuma, kunye neziphumo zokuqhekeka.
Namhlanje, I-HPMC ngumqolo phantse kuzo zonke iimveliso zodaka olomileyo ezikumgangatho ophezulu ukuze zinikezelwe. Ukusebenza kwayo okuthembekileyo kuye kwabangela ukuba kube yimfuneko kwimveliso yomzi-mveliso kunye nokwaziswa kwi-site batching. Kuba naziphi na iingcali ezifuna ukonyuswa kwazo unikezelo lwesamente isicelo, ukuphonononga kunye nokudibanisa okukhethwe kakuhle HPMC imveliso linyathelo elibalulekileyo. Qala ngokubonisana nomthengisi wakho we-admixture ukukhetha ibakala elichanekileyo le-viscosity kwiimfuno zakho zeprojekthi., kwaye uqhube ibhetshi encinci yovavanyo ukulungisa kakuhle idosi yezixhobo zakho zasekhaya kunye nemozulu. Ukuphuculwa kokusebenza kunye nomgangatho ogqityiweyo uya kubonakala ngokukhawuleza.
Umthengisi
I-ConcreteAndMore ngumthengisi othembekileyo wehlabathi jikelele wezinto ezixubeneyo zekonkrithi ezisebenza kakhulu kunye neekhemikhali zokwakha.. Ngeminyaka yobungcali kwishishini, Sisebenza ngokukhethekileyo ekuboneleleni ngezisombululo ezintsha eziquka iipolycarboxylate superplasticizers, imicu yekhonkrithi, defoamers, ii-arhente zogwebu, kunye neemveliso zokugquma ubushushu be-airgel. Ukuba unomdla kwi-concrete admixture, nceda uzive ukhululekile ukuqhagamshelana nathi!