Lub teeb pob zeb Additives | High-Performance Foaming Agents rau Cellular Concrete
Cov lus teb luv luv: ib tug ntau yam dej txo cov superplasticizer admixture yog ib qho zoo tshaj plaws cuab yeej peb yuav tsum tau ua txhaum lub hnub nyoog-laus tradeoff ntawm pob zeb. zog thiab ua haujlwm tau zoo. Nws cia peb hla dej los ntawm 12 rau 30 feem pua thaum ua kom cov dej sib xyaw kom txaus rau cov twj tso kua mis, qhov chaw, thiab ua kom tiav yam tsis muaj kev sib ntaus. Tab sis ntawm no yog tus kicker – siv tsis ncaj ncees lawm, thiab koj yuav caum slump txhua hnub, sib ntaus sib tua, los yog xaus nrog cov pob zeb uas teeb tsa ua ntej koj tuaj yeem tawm ntawm lub tsheb. Kuv tau pom nws tshwm sim ntawm qhov chaw ua haujlwm los ntawm cov cores siab hauv Dubai mus rau precast yards hauv Ohio. Qhov no tsis yog txoj kev xav. Nov yog qhov peb tau kawm txoj kev nyuaj.
Yuav Ua Li Cas Yog Qhov Siab Ntau Yam Dej Txo Superplasticizer Admixture?
Peb hu nws HRWR luv luv, Tab sis qhov kev xaiv nom tswv rau ASTM C494 yog Hom F (siab ntau dej txo) los yog Type G (high-qib dej txo thiab retarding). Nws yog ib tug chemical admixture tsim los ua ib yam exceptionally zoo: deflocculate cement hais. Nyob rau hauv ib tug standard mix, cement nplej zoo li clump ua ke, dej ntxiab uas tsis muaj dab tsi rau kev ua haujlwm. Cov dej uas raug kaw ntawd pov tseg. Ib tug HRWR disperses cov clumps, tso cov dej los lubricate lub paste. Qhov tshwm sim yog qhov txo qis hauv cov dej xav tau yam tsis muaj kev poob qis. Peb tab tom tham txog tig ib qho tawv, xoom-slump mix rau hauv ib qho ntws, self-leveling ib – los yog conversely, noj tib qho sib tov thiab ua kom nws nruj thaum tso cov dej ntsiab lus rau dab compressive zog.
Yuav Ua Li Cas? Kev tshawb fawb peb siv tiag tiag
Ob lub tswv yim tswj hwm qhov kev txiav txim ntawm niaj hnub siab ntau dej txo cov superplasticizer admixtures. Ua ntej, electrostatic dispersion. Cov molecules nyob rau hauv tshuaj sib tov adsorb rau saum npoo ntawm cov cement hais, muab lawv lub zog tsis zoo. Zoo li cov nqi them rov qab, yog li cov khoom sib tsoo sib nrug. Qhov no yog cov tshuab qub, thiab nws ua haujlwm, tab sis nws muaj qhov tsis muaj zog – lub repulsion tuaj yeem raug tshuaj xyuas los ntawm ions hauv cov pore daws lub sijhawm, ua rau poob poob. Tias yog vim li cas koj pom qee tus txiv neej ntawm Reddit yws yws tias lawv cov pob zeb khov kho hauv 20 feeb. Thib ob, thiab tseem ceeb tshaj rau hnub no, steric hindrance. Qhov tshiab polycarboxylate ether (PCE) superplasticizers muaj cov hlua ntev ntev uas lub cev thaiv cov khoom los ntawm kev sib ze txaus rau flocculate. Qhov no muaj zog dua. Nws tuav dispersion ntev dua, txawm nyob rau hauv high-alkali ib puag ncig. Peb tau sim ob sab ntawm ib sab hauv chav kuaj. Qhov txawv yog tsis maj.
Qhov Kev Ntsuas Kev Ua Haujlwm tiag tiag yog qhov tseem ceeb
Tsis nco qab cov lej lag luam. Peb mob siab li cas txog ntawm txoj hauj lwm yog peb yam: pib poob siab, poob ruaj khov, thiab compatibility.
- Initial poob siab: Ib tug zoo HRWR yuav tsum cia koj ntaus ib 9- mus rau 10-nti slump los ntawm kev sib xyaw uas ib txwm muab rau koj 3 ntiv tes. Yog koj tsis pom qhov ntawd, koj koob tshuaj lawm, los yog koj cov cement sib ntaus sib tua.
- Slump tuav: Koj xav tau qhov poob qis los tuav tsawg kawg 45 rau 60 feeb raws li ib txwm muaj. Yog nws poob sai, koj yog ib tug overdosing accelerating admixture, los yog koj tus superplasticizer tsis yog tsim los rau koj cov cement chemistry. Txheeb xyuas qhov sib npaug ntawm sulfate.
- Kev sib haum xeeb: Qhov no yog qhov zais zais. Cov dej ntau yam uas txo cov superplasticizer admixture tuaj yeem ua haujlwm zoo nrog Hom I / II cement los ntawm ib tsob nroj thiab tig mus rau hauv cov gel tsis muaj txiaj ntsig nrog Hom III los ntawm lwm tus.. Peb tau pom nws tshwm sim. Tus neeg ua txhaum feem ntau yog C3A cov ntsiab lus ntawm cov cement. High C3A cements (dhau 8 feem pua) tuaj yeem haus cov superplasticizer ua ntej nws muaj sijhawm ua haujlwm. Qhov kho yog qhov sib txawv ntawm cov tshuaj sib xyaw lossis ntxiv HRWR tom qab hauv lub voj voog batching.
Qhov twg koj xav tau HRWR kiag li
Peb muaj peb qhov kev siv thawj zaug uas tsis tuaj yeem sib tham.
High-kev ua tau zoo pob zeb (HPC). Yog koj aim 8,000 psi los yog siab dua, koj txiav koj cov dej-cement ratio hauv qab no 0.35. Tsis muaj dej ntau ntau txo superplasticizer tshuaj sib tov, uas mix yog unworkable. Nws yuav qhuav, rocky mess uas tsis muaj vibrator kho tau. HRWR tso cai rau koj tso nws, sib sau ua ke, thiab tau txais qhov ntom ntom microstructure xav tau rau kev ua haujlwm ntev.
Self-consolidating qhob (SCC). Qhov no yog daim ntawv tshaj tawm me nyuam rau superplasticizers. SCC tso siab rau tag nrho cov khoom sib xyaw kom ua tiav cov dej ntws uas xav tau kom ntws los ntawm congested reinforcement yam tsis muaj kev vibration.. Peb tau siv nws ntawm tus choj pier kab nrog rebar sib nrug kom nruj koj tsis tuaj yeem haum ib qho cwj mem nruab nrab ntawm lawv. Zoo HRWR, tsis muaj SCC. Lub sijhawm.
Pumped pob zeb rau cov qauv siab. Thaum koj ua pob zeb 300 ko taw vertically, koj xav tau ib tug sib tov uas yog cohesive txaus tsis cais tab sis kua txaus los thawb los ntawm txoj kab. Cov dej ntau yam uas txo cov superplasticizer admixture muab koj qhov sib npaug. Peb tau pom cov haujlwm uas tus neeg ua haujlwm twj tso kua mis tuaj yeem hnov qhov txawv ntawm txoj kab siab – smoother, siv tau yooj yim dua, thiab hnav tsawg dua ntawm cov khoom siv.
Qhov Feem ntau yuam kev peb pom (thiab yuav zam lawv li cas)
Nov yog qhov ua rau tib neeg muaj teeb meem. Ua ntej, overdosing. Nws yog ntxias kom ntxiv HRWR kom tau txais kev poob qis dua. Tab sis dhau los ntawm ib qho chaw, koj ntaus diminishing rov qab. Lub pob zeb tuaj yeem ua oversanded thiab nplaum, los yog phem dua, nws tuaj yeem cais – cov aggregates daws, thiab ib txheej ntawm paste ntab mus rau saum. Peb hu qhov no “los ntshav ntawm steroids.” Kev kho yog ua raws li cov chaw tsim khoom tau pom zoo ntau npaum li cas thiab tsuas yog nce nws yog tias koj tau sim qhov sib xyaw hauv koj cov xwm txheej tshwj xeeb.
Thib ob, kev sib xyaw ua ke. Qhov no yog qhov tseem ceeb. Yog tias koj ntxiv cov dej ntau ntau uas txo cov superplasticizer admixture rau cov cement qhuav, nws tuaj yeem ua rau flash teeb lossis poob sai ntawm kev ua haujlwm. Admixture xav tau dej thiab shear kom disperse zoo. Txoj kev xyaum peb qhia yog sib tov dej thiab cement ua ntej, cia nws ntub dej rau 30 rau 60 vib nas this, ces ntxiv cov tshuaj tov. Qhov no muab lub sijhawm rau cov cement hais kom hydrate me ntsis ua ntej cov dispersant ua. Peb tau sau cov ntaub ntawv uas hloov qhov sib txuas ntxiv ib leeg nce qhov poob qis los ntawm 30 feeb.
Peb, tsis quav ntsej qhov kub thiab txias. Huab cua kub ceev cov tshuaj tiv thaiv. Ib koob tshuaj uas ua haujlwm zoo kawg nkaus ntawm 70 ° F tuaj yeem ua tsis tiav ntawm 95 ° F. Koj yuav tsum tau kho – txawm tias nce qhov ntau npaum li cas los yog hloov mus rau ib qho kev hloov pauv (Hom G). Hloov pauv, huab cua txias qeeb txhua yam. Tej zaum koj yuav xav tau cov khoom sib xyaw tsawg dua los yog lub accelerator kom sib npaug ntawm lub sijhawm teem.
Sib piv HRWR rau Mid-Range Water Reducers
Ib lo lus nug peb tau txais tas li: “Yog vim li cas ho tsis yog siv ib tug mid-range dej reducer?” Cov lus teb los ntawm kev ua haujlwm thiab tus nqi. Mid-range dej reducers (ASTM C494 Hom A) feem ntau ua tiav 6 rau 10 feem pua dej txo. Qhov ntawd yog qhov zoo rau niaj hnub flatwork qhov twg koj xav tau me ntsis siab dua. Tab sis lawv tsis tuaj yeem tsim cov dej-cement ratios ultra-low-cement ratios los yog tus kheej-consolidating ntws uas muaj ntau yam dej uas txo cov superplasticizer admixture tuaj yeem.. Tus nqi sib txawv yog tiag tiag – HRWRs kim dua ib nkas loos – tab sis tus nqi yog undeniable thaum koj xav tau qhov kev ua tau zoo ntxiv. Peb tau khiav cov lej: rau lub siab-lub zog kem ncuav, tus nqi ntxiv ntawm superplasticizer feem ntau yog offset los ntawm kev txuag nyiaj hauv kev ua haujlwm thiab kev vibration ib leeg.
Kev Tswj Xyuas Zoo: Qhov Peb Tshawb Xyuas Txhua Lub Sijhawm
Kev sib raug zoo yog lub npe ntawm qhov kev ua si. Peb tsis txhob cia ib lub nra tawm ntawm cov nroj tsuag yam tsis tau kuaj peb yam.
- Cov ntsiab lus cua: Qee HRWRs tuaj yeem nkag tau me me ntawm huab cua (1 rau 3 feem pua). Qhov ntawd feem ntau zoo, tab sis koj yuav tsum paub nws. Yog tias koj tseem siv cov cua-entraining admixture, koj yuav tsum tau kho cov tshuaj. Peb tau pom cov xwm txheej uas qhov sib xyaw ua ke tau muab tso tseg 8 feem pua cua, tus nqi 20 feem pua compressive zog.
- Slump vs. sij hawm: Peb ntsuas slump tam sim ntawd tom qab sib tov, ces dua ntawm 30 thiab 60 feeb. Yog qhov poob ntau dua 2 inches ib teev, peb kho qhov ntau npaum li cas los yog ntxiv ib qho nruab nrab ntawm cov dej reducer raws li qhov saum toj kawg nkaus ntawm qhov chaw ua haujlwm. Qhov no yog tus qauv kev coj ua rau lub sijhawm ntev.
- Chav ntsuas hnyav: Qhov no catches segregation. Yog hais tias chav tsev qhov hnyav poob qis heev los ntawm lub hom phiaj tsim, lub pob zeb yog airy dhau los yog pib los ntshav. Nres lub ncuav thiab rov npau taws.
Cia thiab txee lub neej tseem ceeb, ib yam nkaus. Cov dej ntau yam uas txo cov superplasticizer admixture yuav tsum muab cia rau hauv qhov txias, qhov chaw qhuav, tawm ntawm tshav ntuj ncaj qha. Yog nws khov, nws tuaj yeem poob nws cov txiaj ntsig. Peb ib txwm tig Tshuag – ua ntej hauv, ua ntej tawm – thiab tsis txhob siv cov khoom uas ntau tshaj 12 lub hlis tshwj tsis yog peb tau sim nws hauv chav kuaj. Tus nqi ntawm ib qho kev thauj khoom tsis tau deb tshaj tus nqi pov tseg cov khoom qub.
Qhov Tseeb Txog Qhov Tsis Zoo
Cia peb ua siab ncaj. HRWRs tsis yog cov mos txwv khawv koob. Kev poob qis dhau lub sijhawm yog qhov kev tsis txaus siab thib ib uas peb hnov ntawm cov rooj sib tham thiab los ntawm cov npoj yaig. Nws yog tiag. Lub admixture disperses cov khoom, tab sis raws li hydration pib, cov khoom ntawm hydration pib nplaum lawv rov qab ua ke. Lub slump ploj mus. Tib txoj hauv kev los tswj nws yog ntxiv cov khoom sib xyaw kom lig li sai tau hauv lub voj voog sib xyaw thiab kom tsis txhob muaj qhov kub thiab txias..
Kev cais tawm yog lwm qhov kev pheej hmoo loj. Thaum koj txo cov viscosity ntawm paste ntau dhau, cov aggregates tsis tuaj yeem nyob twj ywm. Peb tau pom qhov no tshwm sim ntawm txoj haujlwm flatwork qhov twg cov neeg ua tiav tiav nrog cov txheej saum toj kawg nkaus thiab pob zeb hauv qab. Txoj kev daws yog ua kom cov ntsiab lus mortar sib npaug. Yog tias koj ntxiv ib qho superplasticizer, koj feem ntau yuav tsum tau nce cov ntsiab lus zoo sib sau me ntsis kom muaj kev sib koom ua ke.
Thaum kawg, compatibility nrog rau lwm yam additives. Kev sib xyaw ntawm HRWR nrog cov koob tshuaj ntau ntawm retarder tuaj yeem muab rau koj cov pob zeb uas nyob twj ywm rau plaub teev. Qhov ntawd suab zoo heev txog thaum koj paub tias nws yuav tsis muaj zog rau ob hnub. Hloov pauv, sib tov nws nrog lub accelerator tuaj yeem ua rau flash teeb. Ntsuam xyuas koj qhov sib xyaw ua ntej. Peb tsis tuaj yeem ntxhov siab qhov no txaus.
Peb xav kom koj ua tam sim no
Yog tias koj yog tus tshiab siv cov dej ntau yam uas txo cov superplasticizer admixture, pib nrog kev sim batch. Tsis yog lab batch – ib lub tsheb loj loj batch nrog koj cov ntaub ntawv tiag tiag, ntawm qhov kub tiag tiag koj yuav muab tso. Ntsuas txhua yam. Sau qhov poob, cua cov ntsiab lus, thiab kub txhua txhua 15 feeb rau thawj teev. Sib piv cov txiaj ntsig rau koj tus qauv tsim tshwj xeeb. Kho cov koob tshuaj thiab kev sib xyaw ua ke kom txog thaum koj muaj qhov sib xyaw uas rov ua dua. Qhov kev rov ua dua ntawd yog koj qhov kev pov hwm.
Yog koj muaj kev paub tab sis tsoo phab ntsa, saib koj qhov chaw cement. Hloov nws. Peb tau pom cov neeg cog lus hloov cov khoom siv cement thiab mam li nco dheev lawv HRWR ua haujlwm zoo vim tias C3A poob los ntawm 11 feem pua rau 6 feem pua. Qhov kev hloov ntawd tau cawm lawv ntau txhiab tus nqi sib xyaw.
Peb tsis muag admixtures. Peb lub hom phiaj nkaus xwb yog los pab koj kom tau txais qhov tseeb thawj zaug. Pob zeb yog cov khoom muaj sia. Kho nws nrog kev hwm, nkag siab txog chemistry, thiab ntau yam dej txo cov superplasticizer admixture yuav yog koj tus phooj ywg zoo tshaj plaws. Kho nws zoo li ib qho yooj yim additive, thiab nws yuav txo hwj chim rau koj. Kuaj, kho, sim dua. Qhov ntawd yog txoj kev.
Tus neeg muab khoom
ConcreteAndMore yog ib qho kev ntseeg siab thoob ntiaj teb cov khoom lag luam ntawm cov khoom siv ua haujlwm siab thiab cov tshuaj siv tsim kho.. Nrog xyoo ntawm kev lag luam kev txawj ntse, peb tshwj xeeb hauv kev muab cov kev daws teeb meem tshiab suav nrog polycarboxylate superplasticizers, pob zeb fibers, defoamers, foaming agents, thiab advanced airgel thermal rwb thaiv tsev cov khoom. Yog tias koj txaus siab rau kev sib xyaw ua ke, thov koj xav tiv tauj peb!