1. Dab tsi yog npaj-mixed pob zeb?
Teb: Cov pob zeb sib xyaw ua ke yog cov cement, dej, xuab zeb, pob zeb, admixtures thiab ntxhia admixtures thiab lwm yam khoom hauv ib qho kev faib ua feem, tom qab ntsuas thiab sib xyaw ntawm qhov chaw sib tov, nws raug thauj mus rau tus neeg yuav khoom qhov chaw xa khoom hauv lub sijhawm. qhob mix. Pob zeb txhais tau hais tias yog pob zeb ua pob zeb, sawv cev rau pob zeb. Cov lus hais hauv phau ntawv txhais lus yog tóng, thiab nws tuaj yeem hais tau hùn níng tu.
2. Cov qhab nia ntawm cov pob zeb ua kom muaj zog yog dab tsi?
Teb: Raws li lub zog ntawm cov txheej txheem kev ntsuas kev ntsuas tom qab 28 hnub ntawm kev kho tus qauv, nws tuaj yeem muab faib ua 13 qib: C10, C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C70 ,,c80 ua. C yog thawj tsab ntawv loj ntawm lo lus Askiv rau pob zeb, uas txhais tau hais tias pob zeb, thiab tus lej nyob rau hauv lub ces kaum qhia lub zog.
3. Dab tsi yog cov khoom siv dav dav thiab cov khoom tshwj xeeb yog dab tsi?
Teb: Cov qib zog tsis ntau dua C60, qhov poob qis tsis ntau tshaj 180mm, thiab tsis muaj lwm yam yuav tsum tau ua vaj tse. Ib qho ntawm cov ntsuas ntsuas tau tshaj li qhov tau teev tseg ntawm cov khoom siv dav dav lossis pob zeb ua ke nrog cov kev cai tshwj xeeb. Xws li cov pob zeb zoo pob zeb, pawg hauv paus pob zeb, impervious qhob, antifreeze pob zeb, thiab lwm yam.
4. Kev tshuaj xyuas kev xa khoom yog dab tsi?
Teb: Kev tshuaj xyuas ntawm kev lag luam pob zeb yog ua los ntawm cov khoom siv thiab cov neeg xav tau thiab tus saib xyuas ntawm qhov chaw xa khoom. Xws li kev soj ntsuam slump, ua cov ntawv xeem, ntsuas qhov muag pom kev poob qis, ua haujlwm tau zoo, thiab lwm yam.
5. Lub Hoobkas tshuaj xyuas yog dab tsi?
Teb: Kev tshuaj xyuas zoo ntawm kev lag luam pob zeb ua ntej tawm hauv lub hoobkas. Xws li kev kuaj xyuas kom pom qhov poob qis, ua rau lub zog ntsuas qhov ntsuas, ntsuas qhov pom kev poob qis, ua haujlwm tau zoo, thiab lwm yam.
6. Ntau npaum li cas cov cement feem ntau siv rau hauv kev sib xyaw cov nroj tsuag, thiab cov khoom dab tsi rov kuaj dua?
Teb: Feem ntau siv cements hauv cov nroj tsuag sib xyaw yog: Portland cement, Portland cement zoo tib yam thiab cov cement sib xyaw. Portland cement tau muab faib ua P·Ⅰ thiab P·Ⅱ hom, thiab Portland cement zoo tib yam muab faib ua hom zoo tib yam thiab lub zog thaum ntxov, code-named P·O. Cov khoom uas yuav tsum tau rov xyuas dua rau cov cement yog teem sijhawm, kev ruaj ntseg, lub zog, thiab fineness (tshwj xeeb cheeb tsam).
7. Muaj pes tsawg qhov yuav tsum tau muaj rau qhov zoo ntawm cov xuab zeb zoo?
Teb: Muaj cov khoom hauv qab no:
(1) Qhov loj me me faib ua tau raws li qhov xav tau ntawm cov xuab zeb nruab nrab;
(2) Qhov loj me me yog cov xuab zeb nruab nrab, thiab cov ntsiab lus ntawm cov khoom loj dua 10 hli yog me me, txog li 10 feem pua;
(3) Tsis muaj av nkos qe, cov av nkos loj, cov av nkos tsis tshaj 3 feem pua;
(4) Tsis muaj cov cag ntoo, cov cag nyom, av nkos, hnab yas thiab lwm yam khoom siv.
8. Vim li cas cov xuab zeb nruab nrab thiaj li nyiam siv cov pob zeb?
Teb: Xuab zeb muab faib ua xuab zeb ntxhib (3.1-3.7), xuab zeb nruab nrab (2.3-3.0) thiab xuab zeb zoo (1.6-2.2 ) raws li nws cov fineness modulus. Qhov gradation ntawm cov xuab zeb nruab nrab yog qhov tsim nyog, thiab cov ntsiab lus ntawm cov khoom hauv qab 0.3mm tuaj yeem ncav cuag li 15 feem pua, uas yog qhov zoo rau kev siv. Coarse xuab zeb muaj kev sib txhuam siab, uas tsis haum rau kev siv. Qhov chaw ntawm cov xuab zeb zoo yog loj, thiab ntau cov cement yog siv nyob rau hauv tib lub zog, thiab qhov tshwm sim ntawm kev tawg yog siab.
9. Dab tsi yog qhov tseem ceeb ntawm cov pob zeb zoo?
Teb: Feem ntau yog cov khoom hauv qab no:
(1) Qhov loj me me ua tau raws li qhov yuav tsum tau ua, thiab qhov particle gradation yog tas li;
(2) Tsis muaj cov tawv nqaij daj (sov av nplaum nplaum), cov qe av nkos, cov av nkos loj, thiab cov pob zeb loj;
(3) Qhov tsawg dua cov koob-zoo li thiab flake-zoo li hais, qhov zoo dua (cov koob zoo li thiab flake-zoo li cov pob zeb siv rau kev siv cov pob zeb yuav tsum tsis pub tshaj 10 feem pua);
(4) Cov ntsiab lus shale tsawg dua, qhov zoo dua (vim lub zog ntawm shale qis dua, thiab cov ntsiab lus ntawm flaky hais yog nce)
10. Vim li cas thiaj yuav tsum xaiv cov pob zeb ua ntu zus rau kev siv cov pob zeb?
Teb: ib qib grain thiab nruam grain qib. Qib ib leeg yog: 10-20, 16-31.5, 20-40. Cov qib kawm txuas ntxiv yog: 5 ~ 10, 5 ~ 16, 5 ~ 25, 5 ~ 31.5, 5 ~ 40. Nyob rau hauv cov ntaub ntawv ntawm tib lub siab tshaj plaws particle loj ntawm lub pob zeb, lub porosity ntawm ib leeg-grain qib yog loj dua li ntawm cov nruam-grain qib, thiab qhov loj void ratio yuav tsum tau sau nrog mortar. Lub fluidity ntawm cov pob zeb sib xyaw nrog cov pob zeb tsis tu ncua yog zoo dua li ntawm cov pob zeb qib ib, uas yog qhov zoo rau kev siv cov twj siv.
11. Dab tsi yog cov khoom soj ntsuam rau ya tshauv nkag mus rau hauv lub Hoobkas?
Teb: Cov hmoov tshauv ya yog cov hmoov zoo uas tau sau los ntawm cov khoom siv tshem tawm cov plua plav hauv cov pa taws ntawm cov pa taws pulverized thee rauv hauv lub tshuab fais fab, thiab nws muab faib ua peb qib; qib I, qib II thiab qib III. Lub fineness thiab dej xav tau piv ntawm yoov tshauv yuav tsum tau soj ntsuam, thiab cov khoom tseem ceeb yog cov dej xav tau ratio. Yog hais tias qhov fineness me ntsis tshaj tus qauv thiab cov dej xav tau piv raws li qhov yuav tsum tau ntawm chav II, cov tshauv yuav siv tau, txwv tsis pub nws yuav siv tsis tau.
12. Yam khoom twg yuav tsum tau kuaj xyuas thaum tus neeg sawv cev twj tso kua mis nkag mus rau hauv lub hoobkas?
Teb: Nws yuav tsum tau soj ntsuam: dej txo tus nqi, teem sij hawm, 1h slump hloov lub sij hawm, compressive zog piv. Kev ntsuam xyuas niaj hnub tuaj yeem siv C30 theoretical mix test rau kev tsim khoom, thiab cov slurry fluidity tsis tuaj yeem siv los hloov cov pob zeb sib xyaw ua ke (cov txiaj ntsig ntawm cov slurry huv thiab cov kev sib xyaw ua ke sib txawv heev, uas tsis tsim nyog rau kev coj ua ntau lawm). Tus neeg saib xyuas zoo feem ntau muaj qhov tsim nyog dej txo tus nqi, zoo fluidity ntawm cov pob zeb sib tov, thiab zoo slump tuav.
13. Dab tsi yog qhov kev ua yeeb yam tseem ceeb ntawm cov pob zeb sib xyaw?
Teb: Feem ntau sim ua haujlwm, poob qis, thiab roj cov ntsiab lus ntawm qhov sib tov, thiab kev ua haujlwm tau qhia los ntawm kev sib koom ua ke, dej tuav, fluidity, thiab kev ua tiav;
(1) Kev sib koom tes. Kev soj ntsuam pom pom tau hais tias thaum ntsuas qhov poob qis, qhov ntsuas lub cev poob mus rau ib puag ncig, qhia tias muaj kev sib koom ua ke zoo, thaum lub cev ntsuas lub cev tawg mus rau ib sab lossis qee lub pob zeb tawm, thiab qhov chaw tsis lo rau hauv mortar, qhia tias tsis sib haum xeeb.
(2) Kev tuav dej - tom qab cov pob zeb sib tov tau ntim rau hauv lub tog raj kheej slump thiab compacted, muaj me ntsis slurry los yog tsis muaj slurry nyob rau hauv qab ntawm lub tog raj kheej, uas txhais tau hais tias cov dej tuav tau zoo. Yog tias cov pob zeb sib xyaw yog nchuav rau ntawm lub phaj hlau, yuav muaj dej los yog cov cement slurry nyob rau saum npoo Cov dej nag qhia tias cov dej tuav tsis zoo (uas yog, qhov tshwm sim sib cais).
(3) Fluidity - lub fluidity yog qhov zoo yog tias qhov sib tov sib xyaw thiab ntws ncig tam sim ntawd, txwv tsis pub nws tsis zoo fluidity.
14. Kev sib cais ntawm kev sib xyaw ua ke zoo li cas?
Teb: Yog tias pom tias cov cement slurry ntws tawm ntawm ntug ntawm pawg pob zeb sib tov. Tom qab ob peb feeb, cov xuab zeb thiab pob zeb yuav ntog, thiab qhov tshwm sim hauv qab rub tawm yuav raug tsim, uas yog qhov tshwm sim ntawm kev sib cais ntawm cov pob zeb sib xyaw. Kev sib cais yog qhov tshwm sim ntawm kev ua haujlwm tsis zoo ntawm cov pob zeb, uas yooj yim los thaiv cov kav dej thaum lub sij hawm siv thiab yuav txo tau lub zog ntawm cov pob zeb. Feem ntau yog vim li cas rau qhov tshwm sim ntawm kev cais tawm yog tias tus neeg sawv cev siv dej ntau dhau. Koj tuaj yeem txo qhov nyiaj los ntawm 0.2 feem pua thiab sim dua.
15. Qee lub sij hawm qee lub pob zeb hauv cov pob zeb sib tov tsis lo rau hauv mortar, lossis tsis nplaum zoo li taum curd residue. Yog vim li cas?
Teb: Qee cov pob zeb uas tsis yog-stick mortars tshwm sim vim hais tias cov twj tso kua mis muaj cov khoom xyaw viscosity tsawg dua. Cov tsos ntawm taum curd residue yog qhov tshwm sim ntawm kev tsis sib haum xeeb ntawm tus neeg sawv cev ntawm cov twj tso kua mis thiab qee cov khoom hauv cov cement.
16. Dab tsi yog qhov ntsuas ntsuas tus qauv?
Teb: Qhov kev sim thaiv nws sab ntev yog 150mm × 150mm × 150mm yog tus qauv ntsuas ntsuas. Qhov kev sim thaiv nrog ib sab ntev ntawm 100mm × 100mm × 100mm yog qhov ntsuas tsis yog qauv, thiab qhov tshwm sim tom qab compression yuav tsum muab sib npaug los ntawm kev hloov pauv ntawm 0.95 los hloov nws mus rau hauv cov qauv ntsuas ntsuas lub zog.
17. Kev saib xyuas tus qauv yog dab tsi, kev saib xyuas tib yam yog dab tsi?
Teb: Muab cov pob zeb tsim kev sim thaiv rau hauv ib puag ncig nrog qhov kub ntawm 20 ± 2 degree thiab cov av noo ntau dua 95 feem pua yog tus qauv kho. Cov kev kho mob ntawm cov pob zeb tsim kev sim yog tib yam li cov kev kho mob uas tau txais los ntawm cov khoom siv hauv tsev, uas yog hu ua tib yam mob kho.
18. Dab tsi yog qhov impermeability ntawm pob zeb?
Teb: Nws yog hais txog kev ua tau zoo ntawm pob zeb nws tus kheej los tiv thaiv kev nkag mus ntawm cov dej siab rau sab hauv. Ob qho tib si hauv qab daus thiab lub reservoir yuav tsum muaj kev ua haujlwm zoo los tiv thaiv dej. Muaj plaub feem ntau siv los tiv thaiv cov qib: S6, S8, S10, S12 (cov ntawv qub) lossis P6, P8, P10, P12 (cov ntawv sau tshiab), S yog thawj tsab ntawv loj ntawm lo lus "seepage", P yog tus thawj tsab ntawv loj ntawm lo lus Askiv "impervious".
19. Dab tsi yog qhov Frost tsis kam ntawm pob zeb?
Teb: Nws yog hais txog lub peev xwm ntawm pob zeb los tiv thaiv rov qab khov thiab thawing. Frost resistance qib yog F100, F150, F200, F txhais tau hais tias Frost tsis kam, thiab tus naj npawb nyob rau hauv lub ces kaum qhia tus naj npawb ntawm rov qab khov thiab thawing ntawm qhob los ntawm -15 degree mus rau chav tsev kub.
20. Qhov txawv ntawm Frost Resistance thiab Frost Resistance ntawm pob zeb yog dab tsi?
Teb: Qhov kev tiv thaiv ntawm cov pob zeb yog hais txog lub peev xwm ntawm cov pob zeb ua kom rov ua kom khov thiab thawing tom qab ncav cuag lub zog tsim, thaum lub pob zeb ua kom tsis muaj zog yog hais txog lub peev xwm ntawm cov pob zeb sib tov los tiv thaiv qhov kub thiab txias tsis zoo thaum lub sij hawm teeb tsa thiab cov txheej txheem hardening.
21. Tus tub txib yuav tsum xyuam xim rau txoj hauj lwm twg?
teb:
(A) Tshaj tawm cov lus txib thiab npaj cov khoom tsim nyog
(B) Xa cov tsheb tsim nyog, kom qhov chaw tsim kho tsis dhau lub tsheb, ua kom muaj zog, thiab ua haujlwm tsis tu ncua;
(C) Qhib daim nqi tsheb thauj mus los: tus lej sib tov sib xyaw, qhov hnyav piv thiab lub Hoobkas poob qis yog raws li cov ntaub ntawv muab los ntawm lub chaw soj nstuam.
22. Kuv yuav ua li cas yog tias qee qhov chaw tsim kho qhia txog kev tsis txaus ntseeg?
Teb: Tam sim ntawd ceeb toom rau tus thawj tswj kev tsim khoom thiab tus thawj coj ntawm chav kuaj kom paub tias yog vim li cas. Ua ntej, xyuas seb puas muaj qhov sib txawv tsis zoo nyob rau hauv cov ntaub ntawv tsim tawm ntawm lub khoos phis tawj, seb puas muaj cov dej txo qis xwb tsis ntxiv xuab zeb; Thib ob, xyuas seb puas muaj pwm nthuav tawm ntawm qhov chaw nchuav Phenomenon, dhau-thickness ntawm cam khwb cia-hauv-qhov chaw slabs lossis tawg tawg; qhov thib peb yog los xyuas kom meej seb qhov kev npaj ntau npaum li cas tsis raug.
23. Vim li cas thiaj yuav tsum tau siv dej ntau tshaj plaws hauv cov txheej txheem tsim khoom?
Teb: Vim tias thaum huab cua qhuav heev, cov av noo ntawm cov xuab zeb yuav tsawg dua 4 feem pua. Lub sijhawm no, kev siv dej siab tshaj plaws rau ib lub cubic meter ntawm pob zeb tuaj yeem nce ntxiv los ntawm 10kg raws li kev siv dej ntau hauv cov hnub qhuav. Yog tias qhov kev xav tau poob qis, nws yuav tshwm sim los ntawm kev txo cov dej ntawm tus neeg sawv cev ntawm cov twj tso kua mis tsawg dhau. Lub sijhawm no, qhov ntau npaum li cas ntawm cov twj tso kua mis yuav tsum tau nce los ntawm 0.1 feem pua rau 0.2 feem pua. Kev siv dej yuav tsum tsis txhob nce qhov muag tsis pom kev thiaj li ua tau raws li qhov yuav tsum tau ua kom poob qis. Thaum cov dej haus ntau tshaj 5 kg, nws yuav tsum tau qhia rau tus thawj coj ntawm lub chaw kuaj pom zoo.
24. Puas tuaj yeem soj ntsuam cov stirring tam sim no kwv yees qhov degree ntawm dryness ntawm cov pob zeb sib tov?
Teb: Nws tuaj yeem kwv yees tau. Vim tias qhov sib xyaw kom qhuav, qhov ntau dua qhov stirring tam sim no; lub thinner qhov sib tov, qhov me me lub stirring tam sim no. Tus maub los yuav tsum tau ua tib zoo saib xyuas thiab sau cov nplawm tam sim no ntawm txhua qhov sib tov, thiab txiav txim siab qhov sib txawv ntawm qhov sib xyaw ua ke tam sim no sib haum rau qhov tsim nyog slump. Thaum qhov tam sim no tsawg dua qhov ntau, kev siv dej yuav tsum raug txo; thaum qhov tam sim no ntau dua qhov ntau, qhov kev siv dej yuav tsum tau nce ntxiv. Thaum qhov tam sim no loj dhau los yog me me dhau lawm, cov pob zeb tawg yuav tsum tau kuaj pom ntawm lub tank tsheb, thiab yog tias nws tsis ua raws li qhov yuav tsum tau ua, kho nws kom dhau.
25. Dab tsi yuav tsum tau saib xyuas ua ntej kev tsim khoom hauv lub caij ntuj nag?
Teb: (1) Ua ntej, mus rau lub tsev khaws khoom kom pom qhov muag ntsuas cov dej noo ntawm cov xuab zeb thiab pob zeb, thiab txiav txim siab seb txoj kab ntawm qhov sib xyaw siv los siv.
(2) Khiav txoj siv kom qhuav rau ntau tshaj kaum vib nas this ua ntej pub mis kom tshem tawm cov dej ntau ntawm txoj siv. Tom qab ntawd lees paub qhov sib xyaw qhib qhov sib piv thiab kev siv dej raws li qhov xav tau ntawm daim ntawv teev cov haujlwm. Ua ntej tshem tawm, nws yuav tsum tau lees paub tias tus neeg tsav tsheb tau thim rov qab lub tank kom ntws dej, tshwj xeeb tshaj yog tom qab los nag, nws yuav tsum tau ntws tawm ua ntej thauj khoom, thiab tom qab ntawd tshem tawm mus rau hauv lub tank. Tsis pub dhau 10 vib nas this tom qab lub tswb nrov, koj yuav tsum paub tseeb tias lub tsheb tau tawm ntawm qhov chaw nres tsheb los tiv thaiv lub tsheb tsis ncaj ncees los ntawm kev thauj khoom.
26. Kuv puas yuav tsum tau kuaj xyuas thaum muab qhov sib tov sib xyaw rau hauv lub computer?
Teb: Nws yuav tsum tau kuaj xyuas. Ib tug neeg nkag mus thiab lwm tus xyuas kom tsis txhob ua yuam kev. Hauv qee qhov chaw nres tsheb, tus nqi ntawm cov cement tau nkag mus tsis raug; Hauv qee qhov chaw, cov hmoov ntxhia tau siv los ua cov cement, thiab lwm qhov, cov hmoov tshauv ya tau siv los ua cov cement, ua rau rov ua haujlwm ntawm qhov project.
27. Vim li cas lub tsheb thauj khoom pob zeb thim rov qab lub tank kom ntws cov dej phwj tuaj ua ntej thauj khoom?
Teb: Ua ntej thauj txhua lub tsheb, lub tank lub cev yuav tsum tau thim rov qab los xyuas seb puas muaj dej. Yog tias muaj dej, nws yuav tsum tau ntws tam sim ntawd, thiab yog tias tsis muaj dej, ces rov pib dua. Tiv thaiv lub tsheb los ntawm kev ntxuav lub tsheb yam tsis muaj dej huv, ua rau lub Hoobkas pob zeb ua kom nyias nyias siv, lossis thauj lub tsheb tsis muaj dej los nag tom qab los nag, ua rau cov khoom siv rov qab los ntawm qhov chaw tsim kho.
28. Vim li cas tsis muaj leej twg tso dej ntxiv rau hauv cov pob zeb sib xyaw ntawm qhov xav tau?
Teb: Ntxiv dej rau qhov sib tov ua kom cov dej-binder ratio, thiab lub zog ntawm pob zeb yog inversely proportional rau dej-binder ratio. Qhov loj dua cov dej-binder ratio, qhov qis zog. Cov pob zeb sib xyaw tuaj yeem raug diluted los ntawm kev ntxiv tus nqi tsim nyog ntawm cov twj tso kua mis, uas tau tso cai los ntawm lub teb chaws tus qauv "Ready Mixed Concrete" GB/T14902-2012.
29. Qhov kev teeb tsa thawj zaug thiab qhov kawg ntawm pob zeb yog dab tsi?
Teb: Lub mortar nyob rau hauv cov pob zeb sib tov pib poob nws cov plasticity thiab txhais tau tias yog thawj qhov chaw, uas tsis yooj yim los txiav txim rau lub sijhawm no. Feem ntau, lub sijhawm pib yog 8-12 teev (4-6 teev thaum kub siab). Lub sijhawm teem sijhawm kawg yog 12 ~ 16h (5 ~ 7h ntawm qhov kub thiab txias). Nyob rau lub caij nplooj zeeg thiab lub caij ntuj no los yog lub caij ntuj no thiab caij nplooj ntoos hlav, lub sij hawm zaum kawg yuav nyob nruab nrab ntawm 18 thiab 24 teev. Thaum cov pob zeb sib tov tsis tiav 24 teev tom qab nchuav, nws yog retarded, thiab cov retarded yog tshwm sim los ntawm cov khoom xyaw retarding ntau sib xyaw rau hauv cov twj tso kua mis. Qee lub sij hawm thaum huab cua kub poob qis los ntawm 5-10 degree , lub sij hawm teeb tsa ntawm cov pob zeb ua kom ntev, thiab qhov teeb tsa rov qab tshwm sim.
30. Cov teeb meem dab tsi yuav tsum tau them rau hauv cov pob zeb loj?
Teb: Thaum qhov tsawg kawg nkaus ntawm cov pob zeb ua vaj tse loj dua lossis sib npaug li 1m, lossis cov pob zeb uas xav tias yuav ua rau tawg vim qhov kub thiab txias sib txawv ntawm sab hauv thiab sab nraud ntawm cov pob zeb (ntau dua 25 degree) vim yog cov dej kub ntawm cov cement yog hu ua cov pob zeb loj.
(1) Siv cov cement me me li sai tau thaum ua kom lub zog, thiab sib tov ntau cov hmoov tshauv lossis hmoov ntxhia zoo.
(2) Siv cov twj tso kua mis retarding kom ntev lub sij hawm zaum kawg ntawm pob zeb thiab txo qhov kub siab. Tswj qhov kub ntawm qhov sib txawv ntawm qhov nruab nrab thiab qhov chaw ntawm lub pob zeb ua tswv cuab hauv 25 degree. Daim ntawv sab nraud tsis tuaj yeem raug tshem tawm ntxov dhau, thiab daim ntawv yuav tsum tau muab tshem tawm tsuas yog tom qab qhov sib txawv ntawm qhov kub thiab txias ntawm sab hauv thiab sab nrauv ntawm cov khoom yog tsawg dua 20 degree.
31. Vim li cas koj thiaj li yuav tsum tau muab cov ntaub ntawv pov tseg thaum tso cov yeeb nkab mortar?
Teb: Vim hais tias lub zog ntawm cov yeeb nkab-khiav mortar yog qhov tsawg, yog tias cov twj tso kua mis yog concentrated nyob rau hauv ib qho chaw, lub pob zeb muaj zog ntawm cov khoom ntawm qhov chaw yuav tsis ua raws li cov qauv tsim.
32. Dab tsi yog txoj hauv kev zoo tshaj plaws los tiv thaiv cov kab nrib pleb hauv qhov chaw ua vaj tse hauv lub caij nplooj ntoo hlav?
Teb: Qhov zoo tshaj plaws txoj kev yog: tom qab nchuav ib ntu ntawm lub slab nto, siv lub vibrator los co lub pob zeb, rub lub slab nto nrog ib tug ntoo washboard, thiab ces siv lub thatched yas zaj duab xis los ntawm pem hauv ntej mus rau sab nraum qab, thiab siv ib tug trowel. cais cov yeeb yaj kiab los ntawm kev sib koom ua ke lossis qhov kawg. Lub pob zeb yog compacted los ua kom daim ntawv cog lus ruaj khov thiab tiv thaiv nws los ntawm cua tshuab. Yog tias nws yog qhov ceev kom teeb tsa txoj kab thaum lub pob zeb ua tiav thaum kawg, siv daim ntawv riam txiav tawm qhov uas cuam tshuam txoj kab-tawm ntawm qhov ntsuas, thiab tsis txhob nqa nws tag nrho.
33. Vim li cas ho tsis tso cai rau dai tej yam hnyav ntawm lub pob zeb tom qab thaum kawg tau teeb tsa?
Teb: Cov pob zeb tsuas yog ua tiav thiab nws lub zog tsawg heev. Kev dai cov khoom hnyav xws li cov hlau tuav yuav ua rau muaj qhov deformation loj thiab tawg hauv cov slab. Kev nqa cov khoom hnyav yuav tsum tau nqa tawm 24 teev tom qab qhov kawg ntawm cov pob zeb ua los yog thaum lub zog ntawm cov pob zeb nce mus txog 1.2MPa lossis ntau dua.
34. Kev tshawb nrhiav rov qab yog dab tsi?
Teb: Siv ib tug rebound rauj thaws lub nto ntawm lub pob zeb ua qauv. Tom qab lub bounce, lub bounce rauj nyob rau hauv lub ntsuas rebounds tsav lub qhov taw qhia slider mus, thiab nyeem cov rebound tus nqi raws li scale kab ntawm qhov taw qhia slider. Txhua qhov chaw (kev ntsuas cheeb tsam) bounces 16 cov ntsiab lus, tshem tawm 3 qhov siab tshaj qhov tseem ceeb thiab 3 yam tsawg kawg nkaus, yuav siv qhov nruab nrab tus nqi ntawm qhov seem 10 raws li tus nqi rov qab ntawm thaj chaw ntsuas, thiab tom qab ntawd ntsuas tus nqi carbonization qhov tob ntawm cov qauv; siv Tus nqi rebound thiab carbonation qhov tob tus nqi ntawm cheeb tsam kev soj ntsuam tuaj yeem kuaj xyuas hauv "conversion table of concrete strength in survey area" los txiav txim seb tus nqi zog ntawm cov pob zeb hauv qhov chaw soj ntsuam.
35. Yog vim li cas yog vim li cas lub cam khwb cia-nyob rau hauv-qhov chaw slab rau ntawm lub beam los yog nyob rau sab saum toj ntawm lub phab ntsa yog feem ntau yuav tawg?
Teb: Muaj peb yam tseem ceeb:
(1) Qhov saum npoo ntawm cov nqaj lossis phab ntsa vaj huam sib luag yog raug rau tensile kev nyuaj siab, thiab tsim tsis zoo qhov cuab lub zog (kab rov tav reinforcement) tsis txaus.
(2) Tus nqi ntawm kev txhawb nqa yog txaus, tab sis cov neeg ua haujlwm uas tau nchuav cov pob zeb thaum lub sij hawm tsim kho ntawm qhov tsis zoo rau qhov nruab nrab thiab qis ntawm cov nplais, uas tsis tuaj yeem ua lub luag haujlwm ntawm kev tiv thaiv lub zog tensile ntawm lub slab.
(3) Hauv qee lub tsev ib-zaj dab neeg tsim los ntawm cov tib neeg, lub thickness ntawm cov cam khwb cia-hauv-qhov chaw slab yog tsawg tshaj li qhov tsim tshwj xeeb uas yuav tsum tau lossis cov pob zeb muaj zog tsawg dhau.
