Dab tsi yog qhov txiaj ntsig ntawm kev siv cov dej-txo cov neeg ua haujlwm hauv cov khoom sib xyaw ua ke?

Taw qhia txog cov dej txo tus neeg sawv cev

Dej-txo cov neeg ua haujlwm yog ib hom kev sib xyaw ua ke uas tuaj yeem siv ib leeg lossis ua ke nrog lwm cov khoom siv los txhim khokev ua tau zoo ntawm cov pob zeb tshiab thiab tawv tawv. Thaum ntxiv rau cov cement, tsis muaj kev hloov pauv ntawm cov khoom sib xyaw, cov neeg ua haujlwm no tuaj yeem ua kom muaj peev xwm ua haujlwm tau zoo thiab poob qis ntawm kev sib xyaw ua ke; los yog, tsis muaj kev hloov pauv kev ua haujlwm, lawv tuaj yeem txo cov dej sib tov uas yuav tsum tau ua, yog li ua kom cov pob zeb muaj zog thiab ua haujlwm ntev thiab txo cov phenomena xws li tawg, shrinkage, thiab thermal deformation los ntawm hydration ntawm cement. Cov dej-txo cov neeg ua haujlwm los ntawm adsorbing thiab dispersing cement hais, tso dej encapsulated nyob rau hauv cement agglomerates, yog li txhim kho lub zog thiab ntom ntawm pob zeb. Kev tshawb fawb tsis ntev los no ntawm cov neeg ua dej txo qis tau piav qhia txog cov txheej txheem kev sib txuas thiab kev ua haujlwm ntawm cov pa dej-txo cov neeg ua haujlwm, sawv cev los ntawm lignosulfonate, thiab cov dej-txo cov neeg ua haujlwm siab, sawv cev los ntawm polycarboxylate ethers. Nws raug suav hais tias kev tsim cov khoom tshiab nrog cov dej txo qis dua, kev ua tau zoo dua, thiab kev lag luam zoo dua yuav yog lub ntsiab lus tseem ceeb rau kev txhim kho yav tom ntej ntawm cov khoom siv dej-txo cov neeg ua haujlwm siab.

Kev ua haujlwm ntawm cov dej-txo cov neeg ua haujlwm

1.Txo qhov shrinkage tus nqi ntawm qhov chaw ua vaj tse, tiv thaiv cov kab nrib pleb hauv cov khoom ua vaj tse. Nws txhim kho Frost tsis kam, zoo rau lub caij ntuj nokev tsim kho tej yaam num.

2.Yog tsis hloov qhov sib npaug ntawm ntau yam khoom siv raw (tsis suav cov cement) thiab cov pob zeb ua kom muaj zog, txo cov kev siv cov cement. Ntxiv 0.2% rau 0.5% ntawm cov dej ua kom txo qis rau cov cement sib tov tuaj yeem txuag tau ntau dua 15% mus rau 30% ntawm cov cement.

3.Kev sib xyaw ua ke nrog cov dej-txo cov neeg ua haujlwm siab tuaj yeem ua ob npaug rau lub neej ntawm cov pob zeb, txawm tias muaj peev xwm txuas ntxiv lub neej siv lub neej ntawm lub tsev ntau dua li ob npaug.

4.Yog tsis hloov cov proportions ntawm ntau yam raw cov ntaub ntawv (tsis suav dej) thiab pob zeb slump, txo cov dej siv yuav ua rau kom cov pob zeb muaj zog. Lub zog thaum ntxov thiab tom qab tuaj yeem ua tau ntau dua 60% thiab 20% siab dua, raws li cov pob zeb tsis muaj dej-txo cov neeg ua haujlwm. Kev txo cov dej tso cai rau kev tsim cov pob zeb ua kom muaj zog nrog C100 daim ntawv lo.

5.Yog tsis hloov cov proportions ntawm ntau yam raw cov ntaub ntawv, nws muaj peev xwm txhim kho lub rheology thiab plasticity ntawm pob zeb, enabling kev tsim kho yam tsis tas yuav tsum tau rau tus kheej-leveling, twj, los yog vibrating.

Raws li paub zoo, cement, raws li cov ntaub ntawv tseem ceeb hauv cov pob zeb, yog qhov tseem ceeb ntawm kev cuam tshuam rau lub zog thiab kev ua haujlwm ntawm cov pob zeb thiab tseem ceeb ntawm cov pa roj carbon emissions ntawm cov khoom ua vaj tse.

Kev tshwm sim ntawm polycarboxylate dej-txo cov neeg ua haujlwm tso cai rau txo qis ntawm cov cement siv thaum txaus siab rau kev tsim kho thiab kev ua kom tawv tawv ntawm cov pob zeb sib xyaw. Feem ntau, los tsim ib lub cubic meter ntawm pob zeb nrog fluidity compressive zog ntawm 30 mus rau 35 MPa, ntau tshaj 360 kg ntawm cement thiab tshaj 220 kg ntawm cov dej sib tov yog xav tau. Tom qab ntxiv polycarboxylate dej-txo cov neeg ua haujlwm, cov cement tuaj yeem txo qis dua 240 kg, thiab cov dej sib xyaw uas xav tau tsawg dua 160 kg, txuag li ib feem peb ntawm cov cement siv.

Lub luag haujlwm tseem ceeb ntawm polycarboxylate dej-txo cov neeg ua haujlwm hauv kev txo qis kev siv cov cement feem ntau yog tshwm sim hauv ob yam. Ntawm ib sab tes, nws ua tau zoo txo ​​cov qauv void tshwm sim los ntawm cov dej dawb, txhim kho qhov ntom ntom ntawm cov pob zeb; Ntawm qhov tod tes, nws ua tiav ib nrab hloov ntawm cov cement nrog yoov tshauv.