Yuav ua li cas yog tias pob zeb ntub dhau?

1. Taw qhia

Pob zebyog lub hauv paus ntawm kev tsim kho niaj hnub. Los ntawm txoj kev thiab txuas hniav mus rau lub tsev thiab skyscrapers, nws durability thiab versatility ua rau nws nyiam lub tsev khoom thoob ntiaj teb. Txawm li cas los xij, qhov kev ua tau zoo ntawm pob zeb yog nyob ntawm nws qhov sib xyaw ua ke. Ib qho tseem ceeb tshaj plaws yog qhov dej-rau-cement (w / c) piv. Txawm hais tias dej yog qhov tseem ceeb rau hydration thiab kev ua haujlwm, ntau dhau ntawm nws tuaj yeem ua rau muaj ntau yam teeb meem.KimaCell® tshawb nrhiav qhov tshwm sim thaum cov pob zeb ntub dej dhau lawm, tshuaj xyuas qhov tshwm sim ntawm lub zog, durability, zoo nkauj, thiab kev ua haujlwm ntev.

2. Lub luag haujlwm ntawm dej hauv pob zeb

Cov dej hauv pob zeb ua haujlwm rau ntau lub hom phiaj:

• Pib cov tshuaj tiv thaiv nrog cement (hydration)
• Txhim khu kev ua haujlwm rau kev tso kawm thiab ua tiav
• Yooj yim compaction thiab consolidation

Txawm li cas los xij, tsuas yog li 25-30% ntawm cov dej los ntawm qhov hnyav ntawm cov cement yog xav tau kom muaj dej puv. Ib qho dej ntxiv nce qhov sib piv w / c thiab dilutes qhov sib tov, cuam tshuam cov khoom kawg.

3. Nkag siab txog dej-rau-Cement ratio

Qhov sib piv w / c yog qhov piv ntawm qhov hnyav ntawm cov dej rau qhov hnyav ntawmcement siv rau hauv kev sib xyaw ua ke. Ib qho piv txwv qis ua rau muaj zog dua thiab durability tab sis txo kev ua haujlwm. Qhov sib piv ntau dua txhim kho kev ua haujlwm tab sis txo lub zog thiab nce porosity. Qhov zoo tshaj plaws piv feem ntau yog li ntawm 0.4 mus rau 0.6 rau feem ntau cov qauv siv.

4. Cov tsos mob ntawm cov pob zeb ntub dej ntau dhau

Thaum cov pob zeb ntub dej dhau lawm, ntau cov cim qhia tau tshwm sim:

• Cov ntshav ntau dhau (dej nce mus rau saum npoo)
• Segregation ntawm aggregates thiabmuab tshuaj cement
• Lub sijhawm teem sijhawm qeeb
• Cov nqi poob siab tshaj qhov teev tseg
• Deg laitance los yog plua plav tag

5. Cov teebmeem ntawm Compressive Strength

Compressive zog yog cov cuab yeej tseem ceeb tshaj plaws ntawm cov pob zeb hauv kev siv cov qauv. Cov dej ntau dhau ua rau muaj zog capillary porosity, uas ua rau cov matrix tsis muaj zog. Kev tshawb fawb qhia tau hais tias nce qhov sib piv ntawm w / c los ntawm 0.4 mus rau 0.6 tuaj yeem txo qis compressive zog mus txog 30%. Qhov kev poob no cuam tshuam rau lub peev xwm thauj khoom thiab tuaj yeem ua rau lub cev tsis ua haujlwm ntxov.

6. Kev cuam tshuam rau kev ua haujlwm ntev

Durability hais txog cov pob zeb muaj peev xwm tiv taus ib puag ncig xws li lub voj voog khov-thaw, tshuaj lom neeg, thiab puas. Cov dej ntau dhau ua rau muaj qhov permeability, ua kom cov pob zeb ua rau muaj kev cuam tshuam rau:

• Chloride nkag mus thiab steel reinforcement corrosion
• Sulfate nres thiab alkali-silica cov tshuaj tiv thaiv
• Moisture ingress ua rau khov-thaw puas

7. Cracking thiab Shrinkage

Cov ntsiab lus dej ntau dua ua rau kom qhuav qhuav ntau dua vim tias cov khoom sib tov poob dej ntau dhau. Qhov no ua rau:

• Yas shrinkage cracking
• Qhuav shrinkage tawg
• Crazing (zoo nto tawg)

Cov kab nrib pleb no txo ​​qhov kev ncaj ncees thiab kev zoo nkauj ntawm cov pob zeb thiab tuaj yeem ua txoj hauv kev rau dej thiab tshuaj.

8. Nto tsis txaus

Kev sib xyaw ntub dej feem ntau ua rau tsis zoo ntawm qhov chaw tiav vim:

• Los ntshav thiab laitance
• Dusting (pem hauv ntej tsis muaj zog yuav hnav)
• Tsis zoo adhesion ntawm coatings thiab finishes

Cov kev tsis zoo no tsis yog kev zoo nkauj xwb tab sis kuj ua haujlwm zoo, tshwj xeeb tshaj yog nyob rau hauv pem teb thiab pavements.

9. Teem sij hawm thiab kho cov teeb meem

Tshaj dhauntub pob zebsiv sijhawm ntev dua los teeb tsa. Kev teem sijhawm txuas ntxiv ua rau nyuaj rau cov sijhawm tsim kho thiab yuav ua rau kev kho tsis txaus. Kev kho tsis zoo tuaj yeem ua rau:

• Dej tsis tiav
• Txoj kev loj hlob tsis zoo
• Nto tawg

10. Kev sib cais thiab kev sib tsoo

Cov dej ntau dhau tuaj yeem ua rau hnyav sib sau ua ke thaum lub sib zog cement paste nce, ua rau kev sib cais. Qhov no ua rau:

• Honeycombing (voids hauv lub pob zeb)
• Kev faib khoom tsis sib xws
• Txo cov qauv kev ncaj ncees

11. Kev txhawj xeeb txog kev ua haujlwm ntev

Cov pob zeb ntub dej ntau dhau tuaj yeem dhau qhov kev tshuaj ntsuam thawj zaug tab sis raug kev txom nyem los ntawm:

• Txo txoj sia
• Thaum ntxov ntawm deterioration
• Cov nqi kho mob ntxiv

Cov teeb meem no feem ntau tshwm sim xyoo tom qab, ua rau kev sib xyaw ua ke thaum ntxov tseem ceeb heev.

12. Kev nyab xeeb thiab kev pheej hmoo ntawm tus qauv

Cov tswv cuab tsim los ntawm cov pob zeb tsis muaj zog ua rau muaj kev pheej hmoo loj:

• Cov kab thiab kab teeb yuav tsis txhawb nqa cov qauv tsim
• Qhov chaw tawg lossis tawg tuaj yeem ua rau tus neeg mob raug mob
• Accelerated corrosion ntawm reinforcement tuaj yeem ua rau tawg

13. Kev cuam tshuam nyiaj txiag

Kev siv dej ntau dhau hauv kev sib xyaw ua ke tuaj yeem txo cov nqi luv luv los ntawm kev txhim kho kev ua haujlwm, tab sis kev cuam tshuam nyiaj txiag mus sij hawm ntev suav nrog:

• Kho thiab kho cov nqi
• Txoj cai liabilities
• Txo kev siv lub neej

14. Kev coj ua zoo tshaj plaws kom tsis txhob ntub dej ntau dhau

Txhawm rau tiv thaiv dej ntau dhau:

• Sivdej reducers or plasticizers
• Ua haujlwm tswj batching thiab sib tov
• Ua cov kev ntsuas slump thiab kho cov ntsiab lus dej kom haum
• Qhia cov neeg ua haujlwm ntawm qhov chaw txog kev sib xyaw ua ke

Dej yog ib rab ntaj ob sab hauv pob zeb. Txawm hais tias qhov tseem ceeb rau hydration thiab kev ua haujlwm, cov dej ntau dhau cuam tshuam ze li txhua yam khoom tsim nyog ntawm cov pob zeb tawv tawv. Los ntawm kev txo lub zog thiab ua kom ntev mus rau qhov tawg thiab qhov tsis xws luag, qhov kev pheej hmoo ntawm cov pob zeb ntub dej ntau dhau yog qhov tseem ceeb. Los ntawm kev nkag siab txog qhov cuam tshuam thiab siv cov qauv tsim thiab kev tswj kom zoo, cov kev pheej hmoo no tuaj yeem txo qis, ua kom cov vaj tse ruaj khov thiab ruaj khov.

At Kima Tshuaj, peb muab high-zookev tsim kho-qib additivessuav nrog:

HPMC(Hydroxypropyl Methylcellulose) - rau kev tuav dej zoo thiab ua haujlwm tau zoo

MHEC(Methyl Hydroxyethyl Cellulose) - zoo tagnrho rau cov viscosity zoo ib yam thiab daim ntawv thov du

RDP(Redispersible Polymer Powder) - rau kev txhim kho kev sib raug zoo, kev yooj yim, thiab kev ua haujlwm tawg
Txawm hais tias koj tab tom tsim cov pob zeb ua kom tiav, coarse leveling, lossis hloov tau yooj yim hauv cov txheej txheem rwb thaiv tsev niaj hnub,Kima Tshuajadditives pab koj xa cov khoom siv tau ntev, kev ua haujlwm siab uas koj cov neeg siv khoom tuaj yeem ntseeg tau.