Cement
Cement yog cov hmoov zoo uas ua haujlwm hauv cov pob zeb thiab mortar, qhov tseem ceeb rau kev tsim kho. Nws yog tsim los ntawm cua sov limestone thiab av nplaum minerals nyob rau hauv ib lub kiln los tsim clinker, uas yog ces av mus rau ib tug nplua hmoov nrog rau lwm cov khoom xyaw.
Cement yog dab tsi
Cement yog cov hmoov zoo uas ua haujlwm hauv cov pob zeb thiab mortar, qhov tseem ceeb rau kev tsim kho. Nws yog tsim los ntawm cua sov limestone thiab av nplaum minerals nyob rau hauv ib lub kiln los tsim clinker, uas yog ces av mus rau ib tug nplua hmoov nrog rau lwm cov khoom xyaw. Thaum sib tov nrog dej, cement teeb thiab hardens los ntawm cov tshuaj tiv thaiv hu ua hydration, txuas nrog xuab zeb los yog aggregates los tsim cov khoom siv zoo li pob zeb. Ntau hom cement, zoo li Portland cement, ua haujlwm sib txawv raws li lawv qhov muaj pes tsawg leeg thiab cov khoom, ua rau muaj ntau yam kev xav tau kev tsim kho.
Lub zog thiab durability
Cement, thaum sib xyaw nrog dej thiab cov khoom sib xyaw xws li xuab zeb thiab gravel, hardens mus rau hauv cov khoom muaj zog thiab ruaj khov. Cov khoom siv tawv tawv no muaj lub zog tshwj xeeb compressive, ua rau nws zoo tagnrho rau kev coj tus kheej hnyav thiab tiv thaiv kev puas tsuaj los ntawm sab nraud. Cov vaj tse pob zeb, xws li txuas hniav, txoj kev, thiab cov vaj tse, tuaj yeem nyob tau ntau xyoo nrog kev saib xyuas kom raug.
Ntau yam
Cement tuaj yeem sib xyaw nrog ntau yam khoom siv los tsim ntau hom pob zeb, txhua tus muaj nws tus kheej tshwj xeeb. Los ntawm kev kho qhov sib piv ntawm cov cement, dej, thiab aggregate, peb tuaj yeem ua tiav qhov kev xav tau, ua haujlwm tau zoo, thiab ua haujlwm ntev rau kev siv tshwj xeeb. Cement kuj tseem siv tau rau ntau hom ntawv, xws li mortar, grout, thiab qhob blocks, ntxiv rau nws ntau yam.
Yooj yim ntawm kev siv
Cement yog ib qho yooj yim los tuav thiab ua haujlwm nrog, tshwj xeeb tshaj yog thaum piv rau lwm yam khoom siv. Nws tuaj yeem sib xyaw ntawm qhov chaw siv cov cuab yeej siv yooj yim thiab cov tswv yim, tso cai rau kev tsim kho sai thiab siv tau zoo. Cement-raws li cov ntaub ntawv kuj tseem yooj yim rau cov duab thiab pwm rau hauv cov ntawv xav tau, yooj yim rau kev tsim cov txheej txheem nyuaj.
Hluav taws kub
Cov vaj tse pob zeb ua nrog cov cement yog qhov tiv taus hluav taws heev, ua tsaug rau qhov tsis muaj zog ntawm cov cement matrix. Thaum muaj hluav taws kub, pob zeb tsis kub hnyiab, thiab nws tuaj yeem muab kev tiv thaiv tiv thaiv kev sib kis ntawm cov nplaim taws. Qhov kev tiv thaiv hluav taws no ua rau cov cement yog cov khoom siv zoo tshaj plaws rau kev siv hauv cov chaw muaj kev pheej hmoo siab xws li cov chaw tsim khoom, tsev khaws khoom, thiab cov tsev lag luam.
Nqi-zoo
Cement yog tus pheej yig dua piv rau lwm cov ntaub ntawv tsim kho, ua rau nws xaiv tus nqi zoo rau ntau qhov haujlwm. Thaum pib nqis peev hauv cov cement thiab cov ntaub ntawv sib txuas yuav siab dua li qee qhov kev xaiv, qhov ntev ntev thiab kev saib xyuas tsis pub muaj cov qauv cement-based feem ntau cuam tshuam cov nqi no.
Adaptability rau cov huab cua sib txawv
Cov ntaub ntawv cement-based tuaj yeem tsim kom haum rau ntau yam kev nyab xeeb. Piv txwv li, nyob rau hauv cov huab cua txias, tshwj xeeb admixtures tuaj yeem ntxiv rau cov pob zeb sib xyaw kom tsis txhob khov thiab tawg. Ib yam li ntawd, nyob rau hauv qhov chaw kub thiab qhuav, cov cement tuaj yeem tov nrog cov dej tuav cov neeg ua haujlwm kom muaj kev ua haujlwm ntawm cov pob zeb.
Vim Li Cas Xaiv Peb
Siab zoo
Peb cov khoom yog tsim los yog ua raws li tus txheej txheem siab heev, siv cov ntaub ntawv zoo tshaj plaws thiab cov txheej txheem tsim khoom.
Pab neeg tshaj lij
Peb cov kws tshaj lij pab pawg sib koom tes thiab sib txuas lus zoo nrog ib leeg, thiab mob siab rau muab cov txiaj ntsig zoo. Peb muaj peev xwm los daws cov teeb meem nyuaj thiab cov haujlwm uas xav tau peb cov kws tshaj lij thiab kev paub dhau los.
Cov cuab yeej siv siab heev
Lub tshuab, cuab yeej lossis cov cuab yeej tsim los nrog cov thev naus laus zis thiab kev ua haujlwm kom ua tiav cov haujlwm tshwj xeeb nrog ntau dua precision, efficiency thiab kev ntseeg tau.
Tus nqi sib tw
Peb muab cov khoom lag luam zoo dua lossis kev pabcuam ntawm tus nqi sib npaug. Yog li ntawd peb muaj kev loj hlob thiab loyal cov neeg siv khoom.
Kev tswj kom zoo
Peb tau tsim pab pawg tswj xyuas kev ua haujlwm zoo los soj ntsuam txhua yam khoom siv raw thiab txhua txheej txheem tsim khoom.
24H online kev pabcuam
Peb sim thiab teb rau txhua qhov kev txhawj xeeb hauv 24 teev thiab peb pab pawg yeej ib txwm muab koj pov tseg thaum muaj xwm txheej ceev.
Hom Cement
Ordinary portland cement (opc)
Qhov no yog hom cement ntau tshaj plaws, uas yog tsim los ntawm kev sib tsoo sib xyaw ntawm limestone thiab av nplaum, thiab tom qab ntawd muab cua sov rau hauv qhov cub kom sov. Opc teev thiab hardens los ntawm reacting nrog dej, tsim cov tshuaj tiv thaiv hu ua hydration. Nws yog ntau yam thiab tuaj yeem siv rau hauv ntau daim ntawv thov kev tsim kho.
Portland pozzolana cement (ppc)
Ppc yog ib hom cement uas intergrinds opc nrog pozzolanic cov ntaub ntawv, uas yog volcanic tshauv, av nplaum, los yog ya tshauv. Cov ntaub ntawv no txhim khu kev ruaj khov thiab lub zog ntawm cov cement, ua rau nws zoo tagnrho rau cov qauv uas raug rau huab cua hnyav.
Ceev ceev hardening cement
Raws li lub npe qhia, ceev ceev hardening cement tau lub zog sai sai thaum teeb tsa. Nws muaj feem ntau ntawm tricalcium aluminate thiab qis feem pua ntawm gypsum. Cov cement no yog siv rau kev tsim kho sai uas yuav tsum tau muaj zog thaum ntxov.
Sulphate resistant cement
Hom cement no yog tsim los tiv thaiv kev tawm tsam ntawm cov tshuaj sulphates tam sim no hauv av thiab dej hauv av. Qhov sib ntxiv ntawm tricalcium aluminate yog qhov tsawg kawg nkaus los tiv thaiv kev tsim cov expansive compounds uas tuaj yeem ua rau cov pob zeb puas.
Tsawg cua sov cement
Cov cement no tso tawm cua sov ntawm qhov qeeb qeeb thaum lub sij hawm hydration, txo cov thermal tawg hauv cov pob zeb loj xws li cov dams thiab piers. Nws muaj qis feem pua ntawm tricalcium silicate thiab alumina.
Cua nkag cement
Los ntawm kev sib koom ua ke cov neeg ua haujlwm huab cua, cov cement no tsim cov hnab ntim cua me me hauv cov pob zeb, txhim kho nws txoj kev tiv thaiv kom khov-thaw mus thiab txhim kho kev ua haujlwm tsis muaj zog.
Dawb cement
Ua los ntawm cov khoom siv raw uas muaj cov hlau me me thiab manganese, cov cement dawb paub txog nws cov xim ci thiab kev zoo nkauj. Nws feem ntau yog siv rau hauv cov pob zeb zoo nkauj thiab cov ntaub ntawv masonry.
Kev nthuav dav cement
Cov cement tshwj xeeb no nthuav tawm me ntsis tom qab sib xyaw nrog dej, tso cai rau nws sau cov voids thiab tsim cov ntawv kaw ntom ntom hauv cov khoom ua vaj tsev precast.
Qhov chaw qhuav
Cov cement yuav tsum tau muab cia rau hauv qhov chaw qhuav kom tsis txhob nqus cov dej noo los ntawm huab cua lossis hauv av, uas tuaj yeem ua rau clumping lossis deterioration hauv qhov zoo. Qhov chaw uas muaj qhov cua zoo, npog qhov chaw yog qhov zoo tagnrho, xws li lub tsev rau khoom lossis chaw cia khoom.
Tawm hauv av
Khaws cov hnab cement tawm hauv av kom tsis txhob muaj cov av noo uas tuaj yeem nce hauv av. Siv cov pallets, ntoo planks, lossis lwm yam kev txhawb nqa kom ua tiav qhov no.
stacking
Muab cov hnab cement kom huv si hauv kab. Tsis txhob muab lawv ntau dhau kom tsis txhob muaj kev pheej hmoo ntawm kev tawg. Xyuas kom muaj qhov chaw txaus nyob nruab nrab ntawm pawg kom muaj cua zoo.
Kev tiv thaiv los ntawm tshav ntuj ncaj qha
Thaum ziab yog qhov tseem ceeb, lub hnub ci ncaj qha tuaj yeem ua rau qhov kub thiab txias, uas yuav cuam tshuam rau qhov zoo ntawm cov cement. Yog li ntawd, nws yog qhov zoo tshaj kom khaws cov hnab cement kom deb ntawm tshav ntuj ncaj qha.
Ntim
Xyuas kom cov hnab cement tsis zoo thiab tsis torn lossis puas, vim qhov no tuaj yeem ua rau cov dej noo nyob hauv. Xyuas cov kua muag lossis qhov thiab rov muab lub hnab yog tias tsim nyog.
Lub sijhawm raug txwv
Sim txo qis lub sij hawm cov hnab ntim cement raug rau cov kab mob thiab cov dej noo. Siv yam koj xav tau thiab khaws cia kom sai.
Saib xyuas
Tsis tu ncua xyuas cov cement uas khaws cia rau txhua qhov pom tias muaj dej noo lossis puas tsuaj. Yog tias koj pom muaj teeb meem, hais rau lawv tam sim ntawd.
Kev tswj qhov kub thiab txias
Tsis txhob khaws cov cement nyob rau hauv qhov chaw uas qhov kub thiab txias fluctuates heev. Qhov txias txias lossis cua sov tuaj yeem cuam tshuam cov tshuaj lom neeg ruaj khov ntawm cov cement.
Kev sib cais
Khaws cov cement sib cais los ntawm lwm cov khoom siv hauv tsev, tshwj xeeb tshaj yog cov uas tso cov dej noo, xws li masonry lossis ntoo tshiab.
Kev siv tau
Xyuas kom qhov chaw cia khoom siv tau yooj yim rau kev txav mus los thiab muab cov hnab ntim cement.
Kev tsim kho tej yaam num
Cement yog lub hauv paus ntawm kev tsim kho vaj tse xws li vaj tse nyob mus rau skyscrapers, txuas hniav, dams, thiab txoj kev. Nws khi aggregates zoo li xuab zeb thiab gravel los ua pob zeb, uas yog tom qab ntawd molded rau hauv cov khoom siv.
Mortars thiab plasters
Ntxiv nrog rau pob zeb, cement yog ib qho tseem ceeb ntawm cov mortars thiab plasters. Mortar yog siv los ua tus neeg sawv cev rau cib, pob zeb, thiab cov blocks, muab kev ncaj ncees rau cov phab ntsa masonry. Plaster, ntawm qhov tod tes, yog siv los ua kom tiav cov txheej txheem sab hauv thiab sab nrauv.
Precast qhob khoom
Cement yog siv nyob rau hauv kev tsim cov khoom ua vaj tse precast xws li cov kav dej, blocks, kab teeb, thiab panels. Cov khoom no yog tsim nyob rau hauv ib puag ncig tswj thiab thauj mus rau qhov chaw tsim kho rau kev teeb tsa.
Grouting
Cement grout yog siv los sau cov voids thiab kho misalignments hauv cov qauv. Nws yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig zoo nyob rau hauv cov xwm txheej uas qhov kev sib raug zoo los yog kev thauj mus los yog qhov tseem ceeb, xws li hauv qab cov slabs, nruab nrab ntawm cov blocks, lossis ib puag ncig cov khoom sib xyaw.
Cov pob zeb tshwj xeeb
Qee hom cement, zoo li sulfate-resistant cement, yog siv rau cov ntawv thov uas cov pob zeb raug cuam tshuam los ntawm sulfate hnyav los ntawm cov av lossis dej hauv av. Lwm cov cement tshwj xeeb yog tsim rau kev tsim kho hauv qab dej, ua haujlwm refractory, thiab txawm tias cov pob zeb zoo nkauj.
Toj roob hauv pes architecture
Cement yog ua hauj lwm nyob rau hauv toj roob hauv pes architecture rau txoj kev, patios, tuav phab ntsa, thiab vaj vaj tse. Nws durability ua rau nws haum rau sab nraum zoov daim ntaub ntawv uas yuav tsum tau tiv thaiv huab cua thiab ko taw tsheb.
Kev tsim kho vaj tse
Cement plays lub luag haujlwm tseem ceeb hauv kev tsim kho vaj tse, suav nrog kev thauj mus los xws li kev loj, qhov av, thiab kev tsheb ciav hlau. Nws ua kom lub neej ntev thiab kev ntseeg siab ntawm cov txheej txheem tseem ceeb no.
Waterproofing
Cementitious cov ntaub ntawv yog siv rau waterproofing hauv qab daus, ru tsev, thiab lwm yam lug siv los tiv thaiv cov dej infiltration thiab tej kev puas tsuaj.
Artistic creations
Tshaj li kev siv tswv yim, cov kws kos duab thiab cov sculptors siv cov cement rau nws cov khoom zoo nkauj, tsim ob qho tib si ua haujlwm thiab cov khoom zoo nkauj.
Kev ceev faj thaum siv Cement
Kev tiv thaiv ua pa
Cement plua plav yog teeb meem thaum nqus tau, yog li nws tseem ceeb heev uas yuav tsum siv lub ntsej muag plua plav lossis lub tshuab ua pa rau cov khoom me me. Xyuas kom meej tias lub npog ntsej muag haum snugly thiab xis hnav.
Tiv thaiv daim tawv nqaij
Cov cement tuaj yeem ua rau tawv nqaij tawv nqaij lossis muaj tshuaj lom neeg kub hnyiab, yog li hnav lub tes tsho ntev, ris, thiab cov khau kaw-ntiv taw kom npog cov tawv nqaij ntau li ntau tau.
Chaw ua haujlwm qhov cua
Xyuas kom muaj qhov cua zoo hauv qhov chaw ua haujlwm kom tawg cov cement plua plav thiab tiv thaiv nws los ntawm kev nyob hauv huab cua. Siv cov kiv cua lossis lub tshuab tso pa tawm qhov tsim nyog.
Kev tuav cov cement
Ua tib zoo tuav lub hnab cement kom tsis txhob tawg lossis nchuav. Thaum hloov cov cement rau hauv lwm lub thawv los yog tov khoom, ua kom maj mam thiab ua tib zoo kom tsis txhob muaj plua plav thiab spillage.
Cov txheej txheem sib xyaw
Ua raws li qhov tseeb qhov sib piv ntawm cov dej rau cement thaum sib tov kom ua tiav qhov xav tau sib xws. Cov dej ntau dhau tuaj yeem ua rau qhov sib tov tsis muaj zog, thaum me me tuaj yeem ua rau nws nyuaj rau kev ua haujlwm nrog.
Tswj dej noo
Khaws cov cement kom qhuav kom txog thaum npaj siv. Kev sib tov yuav tsum tau ua nyob rau hauv ib qho chaw qhuav kom tsis txhob muaj cov tawv nqaij ntxov ntxov.
Cov cuab yeej tu
Tsis tu ncua ntxuav thiab tswj cov cuab yeej thiab cov cuab yeej siv nrog cov cement kom tsis txhob txhaws thiab xyuas kom lawv ua haujlwm kom raug.
Cia
Khaws cov cement nyob rau hauv qhov chaw qhuav kom tsis txhob ya raws thiab lwm yam khoom uas tuaj yeem ua rau nws kis tau. Xyuas kom lub chaw cia khoom muaj kev ruaj ntseg los tiv thaiv kev nkag tsis tau.
Kev pov tseg pov tseg
Pov tseg cov cement uas tsis siv thiab cov khoom siv tu lub luag haujlwm. Tsis txhob muab pov tseg rau hauv ib puag ncig vim lawv tuaj yeem ua rau muaj kev puas tsuaj rau tsiaj qus thiab ecosystems.
Kuv Yuav Xaiv Qhov Cement Zoo Li Cas
Xav txog kev nyab xeeb thiab ib puag ncig uas yuav siv cov cement. Nyob rau hauv cov cheeb tsam uas muaj high humidity los yog nquag sib cuag nrog dej, waterproof los yog dej-resistant cement hom yog advisable. Ib yam li ntawd, sulfate-resistant cement yog tsim nyob rau hauv cov cheeb tsam uas muaj siab sulfates nyob rau hauv cov av los yog dej.
Cov cement sib txawv muaj lub sijhawm teem sijhawm sib txawv, uas cuam tshuam rau kev tsim kho. Kev teeb tsa ceev ceev yog qhov muaj txiaj ntsig zoo hauv kev kho thaum muaj xwm txheej ceev lossis thaum xav tau kev hloov pauv sai. Hloov pauv, portland cement tsis tu ncua muaj lub sijhawm teeb tsa tus qauv uas haum rau cov sijhawm tsim kho feem ntau.
Qhov xav tau tiav ntawm cov khoom kawg tuaj yeem cuam tshuam kev xaiv cov cement. Piv txwv li, yog xav tau ib tug du, polished tiav, ib tug xis mas nrog zoo hais thiab tsawg alkali ntsiab lus yog nyiam dua. Rau kev ntxhib los yog rustic tiav, ntau cov pa cement sib tov yuav txaus.
Xyuas kom meej tias cov cement uas tau xaiv yog sib xws nrog lwm cov ntaub ntawv siv hauv koj qhov project, xws li kev sib sau, cov khoom sib xyaw, thiab cov khoom siv ntxiv. Kev tsis sib haum xeeb tuaj yeem ua rau txo qis zog lossis kev coj tus cwj pwm tsis zoo ntawm cov khoom tiav.
Txoj kev tsim cov cement
Raw khoom extraction thiab npaj
Txoj kev mus rau kev tsim cov cement pib nrog kev rho tawm cov ntaub ntawv raw, feem ntau limestone (calcium carbonate) thiab av nplaum (nplua nuj silica thiab alumina). Cov ntaub ntawv no yog muab rho tawm los ntawm quarries thiab ces crushed kom txo lawv loj thiab npaj rau kev ua ntxiv.
Raw zaub mov sib tsoo
Cov khoom siv crushed yog hauv av rau hauv cov hmoov zoo hauv lub pob zeb los yog ntsug cov menyuam zeb. Cov txheej txheem no yog hu ua raw khoom sib tsoo thiab xyuas kom meej tias cov khoom siv raw yog sib xyaw thiab muaj cov tshuaj muaj pes tsawg leeg rau kev tsim cov clinker.
Calcination
Cov zaub mov nyoos yog tom qab ntawd rhaub kom kub siab tshaj 1450 ° C hauv qhov cub thaum lub sij hawm calcination. Cov txheej txheem no ua rau muaj cov tshuaj tiv thaiv uas limestone thiab av nplaum hloov mus rau hauv clinker, cov khoom siv tawv nodular uas yog lub hauv paus rau kev ua cov cement.
Clinker txias thiab sib tsoo
Thaum txias, lub clinker yog hauv av rau hauv cov hmoov zoo nrog ntxiv ntawm gypsum thiab lwm yam additives nyob rau hauv ib lub cement zeb. Gypsum ntxiv los tswj lub sijhawm teeb tsa ntawm cov cement. Cov khoom siv hauv av no hu ua cov cement tiav thiab khaws cia hauv silos ua ntej xa mus.
Kev tswj kom zoo
Thoob plaws hauv cov txheej txheem tsim khoom, kev tswj xyuas nruj nruj yog siv los xyuas kom meej tias cov cement ua tau raws li cov qauv xav tau. Cov qauv raug kuaj tsis tu ncua rau lub cev thiab tshuaj lom neeg kom muaj kev sib xws thiab ua raws li cov lus qhia tshwj xeeb.
Alternative fuels thiab raw khoom
Cov nroj tsuag niaj hnub niaj hnub tau siv ntau dua cov roj thiab cov khoom siv los txo cov kev cuam tshuam ib puag ncig. Cov no tuaj yeem suav nrog cov khoom lag luam xws li slag los ntawm steel mills lossis ya tshauv los ntawm cov hluav taws xob hluav taws xob hluav taws xob, nrog rau cov khoom siv hluav taws xob tauj dua tshiab rau kev tua hluav taws.
Zog efficiency
Kev siv hluav taws xob yog qhov kev txhawj xeeb loj hauv kev tsim cov cement. Cov thev naus laus zis xws li preheaters, precalciners, thiab cov khoom siv hluav taws xob pov tseg tau ua haujlwm los txhim kho kev siv hluav taws xob thiab txo cov pa roj carbon monoxide tag nrho ntawm kev tsim cov cement.
Dab tsi yog Cov Cheebtsam ntawm Cement
Calcium Oxide (txiv qaub)
Qhov no yog cov khoom tseem ceeb ntawm cov cement, suav txog li 60-75% ntawm nws qhov loj. Nws yog muab los ntawm calcium carbonate (limestone) thiab cov ntaub ntawv clayey thaum lub sijhawm tsim khoom. Calcium oxide ua lub luag haujlwm tseem ceeb hauv cov tshuaj tiv thaiv hydration ntawm cov cement, pab txhawb kev loj hlob ntawm lub zog dhau sijhawm.
Silica (SiO2)
Silica ua li ntawm 20-30% ntawm cov cement. Nws feem ntau yog los ntawm cov xuab zeb, av nplaum, thiab lwm yam pob zeb tsim. Silica yog koom nrog hauv kev tsim cov calcium silicates, uas yog lub luag haujlwm rau kev txhim kho thaum ntxov ntawm lub zog hauv cov cement.
Alumina (Al2O3)
Alumina muaj li ntawm 4-8% ntawm cov cement thiab yog los ntawm bauxite thiab aluminous av nplaum. Nws reacts nrog calcium hydroxide los tsim calcium aluminate hydrate, uas ua rau lub zog ntxov nce thiab kub hloov pauv thaum lub sijhawm teeb tsa.
Hlau oxide (Fe2O3)
Cov hlau oxide suav txog kwv yees li 0 5-6% ntawm cov cement muaj pes tsawg leeg. Nws tau txais los ntawm cov hlau ore thiab pab rau cov xim ntawm cov cement, feem ntau xws li grey mus rau xim av. Hlau oxide kuj tseem ua lub luag haujlwm hauv kev tsim cov tricalcium aluminate thiab dicalcium silicate, uas yog cov theem tseem ceeb hauv cov txheej txheem hydration.
Magnesium oxide (MgO)
Magnesium oxide muaj nyob rau hauv me me, feem ntau tsawg dua 5%. Nws yog muab los ntawm magnesite los yog dolomic limestone. MgO tuaj yeem cuam tshuam lub sijhawm teeb tsa thiab kev tiv thaiv ntawm cement rau tshuaj tua kab mob, tshwj xeeb tshaj yog los ntawm sulfates.
Sulfur trioxide (SO3)
Sulfur trioxide tau muab tso rau hauv cov cement nyob rau hauv daim ntawv ntawm gypsum (calcium sulfate), uas ua rau li ntawm 1-2% ntawm qhov sib tov. Gypsum ua hauj lwm raws li ib tug txheej txheem regulator, ncua sij hawm thawj qhov chaw ntawm cov cement los xyuas kom meej workability. Nws kuj tseem pab tiv thaiv kev teeb tsa flash, uas tuaj yeem tshwm sim vim qhov kub thiab txias thaum lub sij hawm xa khoom lossis tso.
Alkalis (K2O thiab Na2O)
Potassium oxide (K2O) thiab sodium oxide (Na2O) muaj nyob rau hauv me me, feem ntau tsawg dua 2% ua ke. Lawv tuaj yeem cuam tshuam cov kev ua haujlwm thiab teeb tsa lub sijhawm ntawm cov cement. Tshaj alkalis tuaj yeem ua rau efflorescence, ib qho dawb deposit uas ua rau saum npoo ntawm pob zeb thaum nws kho.
Cov kab ke
Cov kab ke, xws li titanium dioxide (TiO2), phosphorous pentoxide (P2O5), thiab lwm yam, tuaj yeem muaj nyob hauv cov cement ntawm qhov tsis tshua muaj siab thiab tuaj yeem tsim los ntawm cov khoom siv raw lossis ib puag ncig thaum tsim khoom. Cov ntsiab lus no tuaj yeem muaj kev cuam tshuam me me rau cov khoom ntawm cov cement.
Cement yog cov hmoov av nplua nuj ua los ntawm cov cua sov limestone thiab av nplaum hauv qhov cub los ua cov clinker, uas tom qab ntawd muab cov hmoov av rau cov hmoov zoo nrog cov khoom me me, xws li gypsum. Nws yog cov binder, cov khoom muaj zog uas ua kom tawv thiab khi ua ke rau lwm cov khoom xyaw los ua cov khoom sib xyaw. Pob zeb, ntawm qhov tod tes, yog cov khoom sib xyaw uas muaj cov khoom sib xyaw (gravel thiab xuab zeb), dej, thiab cement. Thaum cov khoom xyaw no sib tov, lawv tsim ib qho dej ib nrab uas tuaj yeem nchuav thiab molded rau hauv txhua yam. Nyob rau tib lub sijhawm, nws hardens mus rau hauv ib qho khoom, zoo li pob zeb. Nws yog kev sib xyaw ntawm cov khoom sib xyaw, dej, thiab cement. Nws muaj tus nqi qis dua piv rau cov cement ntshiab thaum xav txog qhov ntim. Nws muaj lub zog compressive siab, ua rau nws zoo tagnrho rau kev siv cov qauv. Lub ntsiab sib txawv yog nyob rau hauv lawv lub luag hauj lwm thiab muaj pes tsawg leeg: cement ua raws li tus neeg sawv cev nyob rau hauv cov pob zeb, thaum lub pob zeb nws tus kheej yog cov khoom siv uas siv cov cement nrog rau cov khoom sib xyaw thiab dej. Pob zeb lub zog thiab durability yog los ntawm cov tshuaj tiv thaiv uas tshwm sim thaum cov cement thiab dej sib cuam tshuam, uas ua rau lub hardened matrix uas khi cov aggregates ua ke. Hauv cov ntsiab lus tswv yim, koj tsis tuaj yeem muaj pob zeb tsis muaj cement vim tias cov cement yog qhov ua kom pob zeb muaj peev xwm ua kom tawv thiab nce lub zog thaum lub sijhawm. Txawm li cas los xij, cov cement ntawm nws tus kheej tsis muab cov qauv tsim muaj zog; nws yuav tsum tau aggregates thiab dej los ua pob zeb. Tsis tas li ntawd, kev siv cov cement thiab pob zeb sib txawv. Cement yog siv nyob rau hauv ntau yam kev siv uas yuav tsum tau ib tug binder, xws li nyob rau hauv mortars, stucco, thiab tsis-structural qhob shrink-siv daim ntaub ntawv. Pob zeb, vim nws lub zog thiab ntau yam, yog siv dav hauv kev tsim kho rau lub hauv paus, phab ntsa, pem teb, txoj kev, txuas hniav, thiab ntau lwm yam khoom siv.
Lub zog ntawm Cement yog dab tsi?
Lub zog yog cov cuab yeej tseem ceeb ntawm cov cement, xav txog nws lub peev xwm los tiv thaiv ntau lub zog yam tsis muaj deformation lossis tsis ua haujlwm. Nws yog ntsuas los ntawm kev ntsuas lub zog compressive, uas ntsuas lub peev xwm ntawm cov khoom siv los tiv thaiv lub zog compression thov perpendicularly rau cov nplej. Hauv cov ntsiab lus ntawm cov cement thiab pob zeb, qhov no feem ntau yog ntsuas los ntawm kev ntsuas lub tog raj kheej lossis lub voos xwmfab thiab ua rau lawv mus rau qhov kev sim compression ntawm cov hnub nyoog sib txawv tom qab sib tov. Lub zog ntawm cov cement tsis yog tus nqi tas li tab sis txhim kho lub sijhawm dhau los ntawm cov txheej txheem hu ua hydration. Thaum cov dej ntxiv rau cov cement, cov tshuaj lom neeg tshwm sim ntawm cov cement thiab dej, ua rau cov khoom loj. Thaum xub thawj, cov cement paste tsis muaj zog, tab sis raws li hydration zuj zus, cov muab tshuaj maj mam nce zog. Tus nqi ntawm lub zog nce yog cuam tshuam los ntawm cov yam ntxwv xws li qhov kub thiab txias, muaj cov khoom sib xyaw, thiab muaj pes tsawg leeg ntawm cov cement nws tus kheej. Compressive zog feem ntau ntsuas hauv megapascals (MPa) lossis phaus ib square inch (psi). Cov txheej txheem ntsuas tus qauv txhais tau tias thaum ntsuas yuav tsum tau ua, feem ntau ntawm 1, 3, 7, 14, thiab 28 hnub tom qab casting. Cov ntsiab lus tseem ceeb no raug xaiv vim lawv sawv cev rau theem tseem ceeb hauv kev txhim kho lub zog. Piv txwv li, feem ntau cov pob zeb ncav cuag li ntawm 70% ntawm lawv 28-hnub compressive zog nyob rau hauv thawj lub lim tiam. Lub 28-hnub compressive zog yog dav txais raws li tus qauv qhia ntawm qhov zoo thiab kev ua tau zoo ntawm cov cement. Txawm li cas los xij, qhov kawg ntawm lub zog ntawm cov cement tuaj yeem txhim kho tshaj li 28 hnub, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj dej txaus rau dej. Lub zog ntawm cov cement kuj tseem cuam tshuam los ntawm qhov zoo ntawm cov khoom siv raw, qhov zoo ntawm kev zom, thiab cov tshuaj lom neeg muaj pes tsawg leeg, uas txiav txim siab qhov sib txawv ntawm cov sib txawv binding compounds tsim thaum lub sij hawm hydration. Piv txwv li, cov cements uas muaj ntau dua calcium silicates feem ntau yuav muaj zog sai dua li cov calcium aluminates ntau dua.
Peb lub Hoobkas
Peb muaj ob txoj kab ntau lawm rau kev tsim cov ntxhia hmoov. Ob txoj kab ntau lawm no siv cov cuab yeej siv siab tshaj plaws thiab cov cuab yeej siv los ua kom cov txheej txheem ntau lawm thiab ruaj khov thiab ua kom cov khoom zoo. Txhua xyoo, lub Hoobkas cov ntxhia hmoov ntau lawm muaj peev xwm tshaj li ib lab tons, muaj peev xwm ntau lawm thiab kev ua tau zoo, muaj peev xwm ua tau raws li qhov xav tau loj rau cov hmoov ntxhia hauv kev lag luam hauv tsev thiab txawv teb chaws.
FAQ
Q: Dab tsi yog cement?
Q: Dab tsi yog qhov sib txawv ntawm cov cement?
Q: Portland cement yog dab tsi?
Q: Dab tsi yog qhov tseem ceeb ntawm cov cement?
Q: Cov cement ua li cas?
Q: Dab tsi yog kev siv cov cement?
Q: Qhov txawv ntawm cov cement thiab pob zeb yog dab tsi?
Q: Dab tsi yog qhov txawv ntawm cement thiab mortar?
Q: Qhov txawv ntawm cement thiab grout yog dab tsi?
Q: Dab tsi yog cov yam ntxwv ntawm cov cement?
Q: Lub zog ntawm cement yog dab tsi?
Q: Dab tsi yog qhov durability ntawm cement?
Q: Dab tsi yog qhov ua haujlwm ntawm cement?
Q: Lub sijhawm teeb tsa ntawm cov cement yog dab tsi?
Q: Dab tsi yog qhov kub ntawm hydration ntawm cement?
Q: Dab tsi yog yam uas cuam tshuam rau lub zog ntawm cov cement?
Q: Cov cement puas tuaj yeem siv rau hauv cov ntawv thov hauv qab dej?
Q: Puas yog cement zoo li pob zeb?
Q: Puas yog cement dej pov thawj?
Q: Kuv puas tuaj yeem siv cov cement tsis muaj xuab zeb?
Cim npe nrov: Cement - Tangshan Enpeng Trading Co., Ltd
