Hnub Kawg:15, Ib,2024
1.Kev siv rau cement:
Qhov sib xyaw ntawm cov cement thiab cementitious cov ntaub ntawv yog complex thiab hloov tau. Los ntawm qhov kev xav ntawm adsorption-dispersion mechanism, nws tsis yooj yim sua kom nrhiav tau tus neeg saib xyuas dej uas tsim nyog rau txhua yam. Txawm tiaspolycarboxylate Cov dej-txo tus neeg sawv cev muaj kev hloov pauv dav dua li naphthalene series, nws tseem yuav muaj kev hloov pauv tsis zoo rau qee cov cements. Qhov kev hloov pauv no feem ntau tshwm sim hauv: txo cov dej txo qis thiab nce poob poob. Txawm hais tias nws yog tib cov cement, cov nyhuv ntawm cov dej txo tus neeg sawv cev yuav txawv thaum lub pob milled rau qhov sib txawv fineness.
Phenomenon:Lub chaw sib tov siv ib qho P-042.5R cement nyob rau hauv cheeb tsam los muab C50 pob zeb rau qhov chaw tsim kho. Nws siv apolycarboxylate muajsupperplasticizerdej-txo tus neeg sawv cev. Thaum ua cov pob zeb sib xyaw, nws pom tau tias tus nqi ntawm cov dej-txo tus neeg sawv cev siv hauv cov cement yog me ntsis ntau dua li lwm cov cements, tab sis thaum lub sij hawm sib xyaw tiag tiag, qhov poob ntawm lub Hoobkas pob zeb sib tov yog pom tau tias yog 21Omm. Thaum kuv mus rau qhov chaw tsim kho kom tshem tawm lub pob zeb twj tso kua mis, kuv pom tias lub tsheb thauj khoom tsis tuaj yeem thauj cov pob zeb. Kuv ceeb toom rau lub Hoobkas kom xa ib lub thoob. Tom qab cov dej-txo tus neeg sawv cev tau ntxiv thiab sib xyaw, qhov pom kev poob qis yog 160mm, uas ua tau raws li qhov yuav tsum tau ua. Txawm li cas los xij, thaum lub sijhawm thauj khoom, nws tshwm sim tias nws tsis tuaj yeem rub tawm. Lub tsheb pob zeb tau raug xa rov qab mus rau lub Hoobkas tam sim ntawd, thiab cov dej ntau thiab cov neeg ua haujlwm txo qis tau ntxiv. Tus neeg sawv cev ua kua tau NW nyuam qhuav tawm thiab yuav luag solidified nyob rau hauv lub mixer tsheb.
Yog vim li cas tsom xam:Peb tsis tau hais kom ua qhov kev ntsuas kev hloov pauv nrog cov khoom sib xyaw ntawm txhua pawg ntawm cov cement ua ntej qhib.
Kev Tiv Thaiv:Ua ib qho kev sib xyaw ua ke nrog qhov sib xyaw ntawm kev tsim kho rau txhua pawg ntawm cov cement ua ntej qhib. Xaiv cov khoom sib xyaw kom haum. "Gangue" raws li kev sib xyaw rau cov cement tsis zoo rau kev hloov pauv mus rau polycarboxylate muaj supperplasticizerdej txo cov neeg ua haujlwm, yog li tsis txhob siv nws.
2.Sensitivity rau dej siv
Vim yog kev sivpolycarboxylate dej-txo tus neeg sawv cev, cov dej siv ntawm cov pob zeb yog txo qis heev. Kev siv dej ntawm ib qho kev ua vaj tse feem ntau yog 130-165kg; Cov dej-cement piv yog 0.3-0.4, lossis txawm tias tsawg dua 0.3. Nyob rau hauv cov ntaub ntawv ntawm kev siv dej tsawg, kev hloov pauv hauv cov dej ntxiv tuaj yeem ua rau muaj kev hloov pauv loj hauv kev poob qis, ua rau cov pob zeb sib xyaw ua kom nrawm nrawm thiab los ntshav.
Phenomenon:Ib qho chaw sib tov siv P-032.5R cement los ntawm ib lub tuam txhab cement los npaj C30 pob zeb. Daim ntawv cog lus xav kom qhov kev poob qis rau qhov chaw tsim kho yog 150mm: t30mm. Thaum cov pob zeb tawm ntawm lub Hoobkas, qhov ntsuas qhov poob qis yog 180mm. Tom qab thauj mus rau qhov chaw tsim kho, cov pob zeb raug ntsuas ntawm qhov chaw tsim kho. Qhov kev poob qis yog 21Omm, thiab ob lub tsheb thauj khoom ntawm pob zeb tau rov qab los ua ntu zus. Thaum rov qab mus rau lub Hoobkas, nws tau txheeb xyuas tias qhov poob qis tseem yog 21Omm, thiab muaj cov ntshav thiab delamination.
Yog vim li cas:Cov cement no muaj qhov hloov tau zoo rau tus neeg saib xyuas dej-txo, thiab tus neeg saib xyuas dej txo qis me ntsis. Lub sij hawm sib tov tsis txaus, thiab qhov slump ntawm cov pob zeb thaum tawm hauv lub tshuab tsis yog qhov tseeb slump vim lub sij hawm sib tov luv.
Kev Tiv Thaiv:Rau cov cement uas yog rhiab heev rau cov koob tshuaj polycarboxylate muajsupperplasticizerdej-txo admixtures, ntau npaum li cas ntawm admixtures yuav tsum tsim nyog thiab ntsuas qhov tseeb yuav tsum siab. Ua kom ntev lub sij hawm sib tov. Txawm hais tias muaj qhov sib tov sib xyaw ua ke, lub sijhawm sib xyaw yuav tsum tsis pub tsawg dua 40 vib nas this, nyiam dua 60 vib nas this.
Post lub sij hawm: Jan-15-2024
