Hnub Kawg: 13 Lub Ib Hlis, 2022
Admixtures xa mus rau ib chav kawm ntawm cov ntaub ntawv uas tuaj yeem txhim kho ib lossis ntau yam khoom ntawm pob zeb.Nws cov ntsiab lus feem ntau tsuas yog suav nrog tsawg dua 5% ntawm cov ntsiab lus cement, tab sis nws tuaj yeem txhim kho kev ua haujlwm, lub zog, ua haujlwm ntev ntawm pob zeb lossis kho lub sijhawm teeb tsa thiab txuag cov cement.
1. Kev faib tawm ntawm cov khoom sib xyaw:
Concrete admixtures feem ntau yog cais raws li lawv lub luag haujlwm tseem ceeb:
ib.Admixtures los txhim kho cov khoom rheological ntawm pob zeb.Muaj cov dej txo tus neeg saib xyuas, tus neeg saib xyuas huab cua, tus neeg saib xyuas dej thiab lwm yam.
b.Admixtures rau kho qhov chaw thiab hardening zog ntawm pob zeb.Muaj feem ntau yog retarders, accelerators, thaum ntxov zog, thiab lwm yam.
c.Admixtures rau kho cov huab cua ntsiab lus ntawm pob zeb.Muaj cov neeg ua haujlwm huab cua nkag, cua nkag mus, cov neeg ua npuas dej, thiab lwm yam.
d.Admixtures los txhim kho pob zeb durability.Feem ntau muaj cov khoom siv cua nkag, cov tshuaj tiv thaiv dej, cov tshuaj tiv thaiv xeb thiab lwm yam.
e.Admixtures uas muab cov khoom tshwj xeeb ntawm pob zeb.Feem ntau muaj cov tshuaj tiv thaiv kab mob, nthuav tawm tus neeg sawv cev, tshuaj pleev xim, tus neeg saib xyuas huab cua thiab cov twj tso kua mis.
2. Feem ntau siv superplasticizers
Dej txo tus neeg saib xyuas yog hais txog cov khoom sib xyaw uas tuaj yeem txo cov dej sib xyaw ua ke nyob rau hauv tib qho xwm txheej ntawm pob zeb slump;los yog tuaj yeem ua kom cov pob zeb poob qis thaum qhov sib xyaw ua ke thiab kev siv dej tsis hloov.Raws li qhov loj ntawm cov dej txo tus nqi lossis qhov nce ntawm qhov poob qis, nws tau muab faib ua ob pawg: tus neeg saib xyuas dej zoo tib yam thiab cov dej ua kom muaj txiaj ntsig zoo.
Tsis tas li ntawd, muaj cov dej-txo cov khoom sib xyaw ua ke, xws li cov khoom siv dej-txo cov dej-txo, uas muaj cov dej-txo thiab huab cua-entraining;thaum ntxov-lub zog dej-txo cov neeg sawv cev muaj ob qho tib si dej-txo thiab thaum ntxov-lub zog-txo cov teebmeem;Dej txo tus neeg sawv cev, kuj muaj kev ua haujlwm ncua sijhawm teem sijhawm thiab lwm yam.
Lub luag haujlwm tseem ceeb ntawm dej reducer:
ib.Tseem ceeb txhim kho fluidity nrog tib sib tov piv.
b.Thaum lub fluidity thiab cement ntau npaum li cas tsis hloov, txo cov dej noj, txo cov dej-cement piv, thiab nce lub zog.
c.Thaum lub fluidity thiab lub zog tseem tsis hloov, cov cement noj tau txais kev cawmdim thiab tus nqi txo.
d.Txhim kho kev ua haujlwm ntawm pob zeb
e.Txhim kho qhov durability ntawm pob zeb
f.Configure high-strength thiab high-kev ua tau zoo pob zeb.
Polysulfonate series: suav nrog naphthalene sulfonate formaldehyde condensate (NSF), melamine sulfonate formaldehyde polycondensate (MSF), p-aminobenzene sulfonate formaldehyde polycondensate, hloov lignin sulfonate, polystyrene Sulfonates thiab sulfonated ketones, thiab lwm yam. Naphthalene sulfonate formaldehyde condensate.
Polycarboxylate series: zoo tswj cov txheej txheem hydration thawj zaug thiab txo qhov poob ntawm pob zeb.
Qhov sib txawv ntawm qhov ua tau zoo ntawm cov dej-txo tus neeg saib xyuas thiab tus neeg saib xyuas dej-txo zoo tib yam yog qhov tseem ceeb hauv qhov kev ua tau zoo ntawm cov dej-txo tus neeg sawv cev tuaj yeem ua kom cov dej ntau ntxiv hauv ntau qhov ntau, lossis tsis tu ncua txo cov dej xav tau.Qhov ua tau zoo ntawm cov dej reducers zoo tib yam yog me me.
Cov nyhuv ntawm superplasticizer ntawm ib qho me me tsis tuaj yeem siv los ua lub hauv paus rau kev txiav txim siab kev ua haujlwm ntawm superplasticizer.Qhov no yuav tsum tau coj mus rau hauv tus account thaum xaiv cov dej reducer.Qhov ntau npaum li cas ntawm superplasticizer yuav tsum tau txiav txim siab los ntawm kev sim, thiab nws yuav tsum tsis txhob siv tsuas yog raws li qhov ntau npaum ntawm cov chaw tsim khoom superplasticizer.
Post lub sij hawm: Jun-13-2022