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Vim li cas kuv thiaj li hloov mus rau RDP Powder - thiab tsis txhob tig rov qab
Kuv tseem nco txog thaum sawv ntxov. 2004, ib lub ru tsev tiaj tus hauv Munich. Cov neeg siv khoom tau siv tus qauv cement mortar xyoo ua ntej. Txhaum qhov txhia chaw. Cov dej hauv lub ces kaum zoo li lub pas dej me me tu siab.
Hnub ntawd yog hnub kuv kawm txoj kev nyuaj: zoo tib yam cement mortar tsis muaj a polymer modifier tsis yog cov khoom siv waterproofing. Nws yog daim txhuam cev.
Kuv tus cob qhia, ib tug qub German chemist hu ua Klaus, muab ib lub hnab me me ntawm cov hmoov dawb rau kuv. “Qhov no,” nws hais, “yog RDP hmoov rau cement raws waterproofing. Siv nws txoj cai, thiab dej nyob twj ywm. Siv nws yuam kev, thiab koj yuav rov qab los ntawm no xyoo tom ntej.”
Kuv yeej tsis ntsia rov qab. Hnub no, Kuv xav muab tib lo lus ncaj nraim Klaus muab rau kuv. Tsis muaj fluff. Tsis muaj kev lag luam. Tsuas yog yam ua haujlwm xwb.
1. To taub dab tsi RDP Powder yog (thiab Tsis yog)
Redispersible polymer hmoov (RDP) yog ib qho tshuaj tsuag-dub polymer. Yog lawm. Nws tsis yog cement. Nws tsis yog fiber ntau. Nws yog qhuav, free-flowing resin rehydrates thaum tov nrog dej hauv koj cov mortar.
Thaum cov cement hydrates, RDP particles fuse rau hauv cov yeeb yaj kiab txuas ntxiv. Cov yeeb yaj kiab ntawd hloov tau. Nws txuas hniav micro-tawg. Nws thaiv dej.
- Kev sib xyaw: Feem ntau yog copolymer ntawm vinyl acetate thiab ethylene (KOOB), los yog acrylic-raws li rau kev ua tau zoo formulations.
- Particle loj: 50-200 microns ua hmoov qhuav.
- Zaj duab xis tsim kub: Feem ntau RDP hom tsim ib zaj duab xis saum 0 ° C. Xyuas cov ntaub ntawv technical (TDS) rau koj cov khoom tshwj xeeb.
Tsis txhob cuam tshuam RDP nrog kua latex lossis SB latex. Cov no yog cov emulsions ntub dej. RDP yog hmoov qhuav. Nws yog nyob rau hauv cov nroj tsuag qhuav los yog ib lub hnab uas koj tuaj yeem khaws cia rau hauv lub txee rau lub hlis.
2. Ntsuas qhov tseeb npaum li cas—tsis muaj kwv yees
Klaus muaj txoj cai: hnyav txhua yam. Tsis pom qhov muag.
Qhov kev pom zoo ntawm RDP hmoov rau cov cement raws li kev tiv thaiv dej los ntawm 2% rau 6% los ntawm qhov hnyav ntawm cement. Rau feem ntau cov qauv siv (chav dej, balconies, lub ru tsev), 3-4% yog qhov chaw qab zib.
Mus hauv qab no 2%, thiab zaj duab xis nyias dhau lawm. Cracks yuav tsim. Mus saum toj no 6%, thiab koj pheej hmoo ua nplaum, qeeb-setting mess.
| Daim ntawv thov | RDP % los ntawm Cement Weight | Nco ntsoov Elongation (ASTM C 1305 Cov) |
|---|---|---|
| Sab hauv skim tsho waterproofing | 2.5 - 3.5% | 20 - 40% |
| Sab nrauv sam thiaj lossis ru tsev txheej | 3.5 - 5.0% | 40 - 70% |
| Hauv qab-qib waterproofing (dej siab) | 5.0 - 6.0% | 60 - 100% |
Chav ntsuas: Yog koj muaj ib tug 50 kg hnab, thiab koj lub hom phiaj yog 4% RDP, ntxiv raws nraim 2.0 kg ntawm RDP hmoov. Siv lub ntsuas. Chav ua noj nplai ua haujlwm rau cov khoom me me. Rau cov khoom loj, siv calibrated industrial scale.
3. Sib tov nyob rau hauv Qhov Tseeb
Kev txiav txim tseem ceeb. Yog tias koj muab RDP pov rau hauv dej ua ntej, koj tau lumps. Cov qog tsis zoo.
Nov yog cov txheej txheem sib xyaw ua ke uas kuv tau siv dhau los 200 chaw ua haujlwm:
- Qhuav ua ntej. Nyob rau hauv ib lub thawv huv, muab koj cov cement, xuab zeb (0.1-0.5 mm qib silica xuab zeb yog qhov zoo tshaj plaws), thiab RDP hmoov. Mix rau 2 feeb kom txog thaum cov xim sib xws.
- Ntxiv 80% ntawm cov dej. Siv dej huv ntawm 20 ° C ± 5 ° C. Pib lub tov khoom ntawm tsawg ceev (200-300 RPM).
- Mix rau 3 feeb. Qhwv lub sab thiab hauv qab nrog ib tug trowel. Ntxiv qhov seem 20% dej yog qhov sib xws zoo li tawv.
- Qhov kawg mix rau 2 feeb ntawm nruab nrab ceev (400-600 RPM). Lub mortar yuav tsum yog creamy, tsis nqhis.
Tseem ceeb: Cia lub mortar so rau 5 feeb. Qhov no hu ua “slaking.” Ces do maj mam rau 30 vib nas this. Thov tam sim ntawd. Tsis txhob ntxiv dej tom qab slaking.
4. Thov nrog Cov Cuab Yeej Zoo thiab Thickness
Koj qhov kev sib xyaw yog qhov zoo. Tam sim no tsis txhob rhuav tshem nws nrog kev siv tsis zoo.
- Txhuam: Qhov zoo tshaj plaws rau thaj chaw me me thiab cov ces kaum. Siv cov txhuam nylon tawv. Ob lub tsho loj, hla ntawm 90 qib.
- Cov menyuam: Qhov zoo tshaj plaws rau qhov chaw tiaj tus. Siv ib tug nruab nrab-nap mohair roller. Tsis txhob over-roll. Tsuas yog ob zaug xwb.
- Txau: Rau lub ru tsev loj lossis phab ntsa. Siv lub twj tso kua mis piston nrog cov tshuaj tsuag nozzle. Hnav PPE tag nrho. Atomization siab: 0.4-0.6 MPa.
Txawm li cas los xij, thov hauv ob lub tsho loj. Thawj lub tsho loj: 1.0 - 1.2 mm ntub zaj duab xis thickness. Cia nws qhuav rau 4-6 teev (ntawm 23 ° C, 50% RH). Lub tsho thib ob: 1.0 - 1.2 mm ntub zaj duab xis thickness. Tag nrho cov zaj duab xis qhuav thickness: 1.5 - 2.0 mm.
Tsis txhob siv ntau tshaj 2.5 mm ntub hauv ib lub tsho loj. Nws yuav tawg. Ntseeg kuv, Kuv muaj cov duab los ua pov thawj.
5. Kho kom raug—los yog saib tsis taus
RDP hmoov rau cement raws li waterproofing xav tau kev kho kom zoo los tsim cov yeeb yaj kiab polymer txuas ntxiv. Cement hydration thiab polymer zaj duab xis tsim tshwm sim ib txhij. Disrupt ib, thiab koj poob rau lwm tus.
Hnub 1: Khaws cov coated nto moist. Muab nws nrog dej txhua 4 teev. Los yog npog nrog ntub burlap. Tsis txhob cia nws qhuav sai. Kub: 10-30 ° C.
Hnub 2–3: Khaws cia. Tsis ncaj tshav ntuj. Tsis muaj nag. Rau cov haujlwm sab nrauv, tsev pheeb suab thaj tsam nrog cov ntaub ntawv yas.
Hnub 4–7: Ib txwm ambient tej yam kev mob. Cov yeeb yaj kiab polymer txuas ntxiv ua ke. Tag nrho cov dej tsis kam tsim tom qab 7 hnub. Test nrog lub pas dej ua ke (25 mm dej tob rau 24 teev) nyob rau hnub 8.
Txoj cai nyuaj-thiab-ceev: yog tias koj tuaj yeem khawb qhov chaw nrog koj cov ntiv tes rau hnub 2, koj kho mob qhuav dhau lawm. Ntxiv noo noo.
6. Saib Compatibility-Polymer, Cement, thiab Additives
Tsis yog txhua cov cement coj zoo ib yam nrog RDP. Nov yog qhov kuv tau kawm thoob plaws peb lub tebchaws:
- Cement hom: Ordinary Portland Cement (OPC) CEM I 42.5 ua haujlwm flawlessly. CEM II and CEM III (nrog slag) kuj ua haujlwm, tab sis txo RDP ntau npaum li cas los ntawm 0.5% kom tsis txhob over-retardation.
- Aggregates: Siv silica xuab zeb nrog qhov siab tshaj particle loj ntawm 0.6 mm. Rau cov coatings tuab, mus txog 1.0 mm yog txais. Tsis txhob siv cov hmoov av limestone; nws absorbs dej thiab cuam tshuam kev tsim cov yeeb yaj kiab.
- Plasticizers: Yog tias koj siv polycarboxylate-based superplasticizer, ntxiv rau dej ua ntej sib tov. Tsis txhob tshaj 0.2% los ntawm cement hnyav. Plasticizer ntau dhau ncua kev teeb tsa nrog RDP.
Cov lus qhia tshwj xeeb: Rau freeze-thaw kuj, ntxiv 0.1% los ntawm qhov hnyav ntawm polypropylene microfiber (6 mm ntev). Qhov no yog raws li cov ntaub ntawv los ntawm lub 2021 RILEM TC-EMR tsab ntawv ceeb toom qhia a 40% txhim kho nyob rau hauv khov-thaw durability nrog no ua ke.
7. Khaws cov hmoov kom raug
RDP hmoov yog hygroscopic. Nws absorbs noo noo los ntawm huab cua. Yog nws absorbs ntau heev, nws yuav tsis redisperse. Zaj duab xis yuav tsis muaj zog.
Txoj cai cia:
- Khaws cov hnab ntim tsis tau qhib ntawm 5-35 ° C. txheeb ze humidity hauv qab no 60%.
- Tsis txhob qhib lub hnab kom txog thaum koj npaj siv nws.
- Ib zaug qhib, siv tag nrho lub hnab hauv 24 teev. Los yog muab khi rau hauv lub nruas yas nrog lub hnab desiccant.
- Txee lub neej: 12 lub hlis txij li hnub tsim khoom hauv ntim ntim. Tom qab ntawd, xeem rau kev tsim zaj duab xis ua ntej siv.
Yog tias koj khaws RDP hmoov rau cov cement raws li cov dej tsis muaj dej hauv lub tsev khaws khoom ntub dej, koj yuav them tus nqi. Kuv tau pom tag nrho pallet tig mus rau hauv ib qho khoom thaiv. Nqe lus kawm.
8. Kuaj Ua Ntej Koj Ntseeg
Txhob coj kuv lo lus rau nws. Ntsuam xyuas koj cov formulation.
Yuav tsum tau kuaj xyuas zoo (ASTM C 1305 Cov):
- Kuaj tensile adhesion ntawm lub pob zeb substrate: yam tsawg kawg nkaus 1.0 MPa tom qab 28 hnub.
- Kuaj elongation: yam tsawg kawg nkaus 30% rau general-purpose waterproofing.
- Ntsuas dej permeability: tsawg dua 5 ml ntawm dej nkag mus tom qab 24 teev sub 0.5 MPa siab.
Xa cov qauv mus rau lub chaw kuaj sim. Los yog ua qhov yooj yim 100-teev kev sim dej rau hauv koj lub khw. Yog tus qauv nce ntau dua 5% hnyav, koj cov tshuaj RDP tsawg dhau lossis koj qhov kev kho mob tsis zoo.
Klaus tau hais, “Lub lab yog kim. Lub rework yog kim dua.” Nws hais yog lawm.
Zaum Kawg: Koj daim ntawv qhia ib kauj ruam dhau-kauj ruam
Cia kuv sau txhua yam rau hauv ib lub rooj huv si. Khaws qhov no hauv koj lub xov tooj. Khaws rau ntawm phab ntsa ntawm koj qhov chaw sib tov.
| Kauj ruam | Kev ua | Cov ntsiab lus tseem ceeb |
|---|---|---|
| 1. Tsim qauv | 3-5% RDP los ntawm cement hnyav | Ntsuas qhov tseeb. Tsis muaj kwv yees. |
| 2. Qhuav sib tov | Cement + xuab zeb + RDP | Sib tov 2 min kom txog thaum uniform |
| 3. Ntxiv dej | 80% ua ntej, 20% tom qab ntawd | Dej kub 20 ° C ± 5 ° C |
| 4. Sib tov | 3 min qis ceev, 2 min nruab nrab ceev | So kom txaus 5 min. Ces do. |
| 5. Siv lub tsho tiv no 1 | 1.0-1.2 hli ntub dej thickness | Txhuam, cov menyuam, los yog tshuaj tsuag |
| 6. Tos 4-6 teev | Cia nws qhuav ntawm 23 ° C, 50% RH | Duab ntxoov ntxoo, tsis muaj nag |
| 7. Siv lub tsho tiv no 2 | 1.0-1.2 hli ntub dej thickness | Hla ntawm 90 ° rau lub tsho 1 |
| 8. Kho | Khaws damp rau 3 hnub | Mist txhua 4 teev hnub 1 |
| 9. Kuaj | Ponding test rau hnub 8 | 25 mm dej, 24 teev |
Tam sim no koj muaj tib qhov system kuv tau siv rau 20 xyoo. Kuaj nws ntawm ib thaj me me ua ntej. Kho cov koob tshuaj rau koj qhov kev nyab xeeb. Khaws cov ntaub ntawv.
Waterproofing tsis yog khawv koob. Nws yog chemistry. Tau txais cov hmoov RDP rau cov cement raws li dej tsis zoo, thiab koj txoj haujlwm yuav tuav dej rov qab rau xyoo lawm. Qhov ntawd yog hom lub koob npe nrov uas tsim kev ua haujlwm.
Mus sib tov ib yam uas kav ntev.
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!