Npaj-mix mortar yog cov khoom siv hauv tsev tsim los siv rau hauv kev tsim kho.Nws yog tsim los ntawm kev sib xyaw cov cement, xuab zeb thiab dej hauv qhov sib txawv, nyob ntawm qhov xav tau lub zog thiab sib xws ntawm cov khoom tiav.Ntxiv nrog rau cov khoom xyaw yooj yim no, cov khoom sib xyaw ua ke kuj muaj ntau yam tshuaj ntxiv uas tsim los txhim kho nws cov kev ua tau zoo thiab ua haujlwm ntev.
Chemical additives yog cov tshuaj ntxiv rau cov khoom siv los txhim kho lossis hloov nws cov khoom.Rau cov mortars npaj txhij, cov additives no feem ntau xaiv rau lawv lub peev xwm los txhim kho kev ua hauj lwm, txo lub sij hawm teem caij, nce dej tuav, thiab txhim khu lub zog thiab durability ntawm cov khoom tiav.
Nyob rau hauv tsab xov xwm no peb yuav saib qee qhov tseem ceeb ntawm cov tshuaj additives uas feem ntau siv hauv kev npaj sib tov mortar manufacturing.
1.Retarder
Retarders yog ib chav kawm ntawm cov tshuaj additives siv los ua kom qeeb lub sij hawm ntawm cov khoom siv cement.Lawv ua hauj lwm los ntawm kev ncua cov tshuaj tiv thaiv uas tshwm sim thaum cov cement los rau hauv kev sib cuag nrog dej, muab sijhawm rau cov neeg ua haujlwm kom ua tiav cov haujlwm ua ntej cov mortar.
Retarders yog tshwj xeeb tshaj yog pab tau nyob rau hauv cov huab cua kub los yog thaum ua hauj lwm nrog ntau ntau ntawm mortar, uas yuav txwv tsis pub dhau sai heev.Lawv feem ntau yog ntxiv rau hauv qhov sib tov ntawm mortar ntawm tus nqi ntawm 0.1% mus rau 0.5% ntawm cov ntsiab lus cement.
2. Plasticizer
Plasticizers yog lwm hom tshuaj ntxiv uas feem ntau siv rau hauv cov khoom sib xyaw ua ke.Lawv lub hom phiaj yog txo cov viscosity ntawm cov tshuaj khib, ua kom yooj yim rau kev lis thiab siv.
Plasticizers feem ntau yog ntxiv rau hauv mortar sib tov ntawm tus nqi ntawm 0.1% mus rau 0.5% ntawm cov ntsiab lus cement.Lawv txhim kho cov yam ntxwv ntws ntawm cov mortar, ua kom yooj yim rau kev sib kis thiab ua tiav cov txheej txheem saum npoo.
3. Tus neeg saib xyuas dej
Dej-retaining tus neeg saib xyuas yog ib hom tshuaj additives uas txhim kho cov dej-retaining kev ua tau zoo ntawm mortar.Lawv lub hom phiaj yog los txo cov dej poob los ntawm evaporation thaum lub sij hawm kho, uas pab tiv thaiv shrinkage thiab tawg.
Cov dej khaws cia feem ntau yog ntxiv rau cov tshuaj khib nyiab sib xyaw ntawm tus nqi ntawm 0.1% mus rau 0.2% ntawm cov ntsiab lus cement.Lawv txhim kho kev ua haujlwm ntawm cov mortar, ua kom yooj yim rau kev thov thiab ua tiav ib qho du, txawm nto.
4. Air-entraining tus neeg saib xyuas
Cov khoom siv cua nkag tau siv los ua kom paub cov cua npuas me me rau hauv cov khoom sib tov sib xyaw.Cov npuas no ua raws li cov khoom poob siab me me, ua rau cov kav ntev thiab khov-thaw tsis kam ntawm cov khoom tiav.
Cov neeg ua haujlwm huab cua feem ntau yog ntxiv rau cov tshuaj khib nyiab sib xyaw ntawm tus nqi ntawm 0.01% mus rau 0.5% ntawm cov ntsiab lus cement.Lawv tuaj yeem txhim kho kev ua haujlwm ntawm cov mortar thiab ua kom yooj yim rau kev thov, tshwj xeeb tshaj yog thaum ua haujlwm nrog cov khoom sib xyaw nyuaj.
5. Accelerator
Accelerators yog cov tshuaj additives siv los ua kom lub sijhawm teem sijhawm ntawm mortar.Lawv feem ntau yog siv nyob rau hauv huab cua txias los yog thaum mortar yuav tsum tau ua kom tiav sai sai.
Accelerators feem ntau yog ntxiv rau hauv qhov sib tov ntawm mortar ntawm tus nqi ntawm 0.1% mus rau 0.5% ntawm cov ntsiab lus cement.Lawv tuaj yeem pab txo lub sijhawm nws siv rau mortar los kho thiab ncav cuag lub zog tag nrho, uas yog ib qho tseem ceeb ntawm kev tsim kho lub sijhawm.
6. Kev ua haujlwm siab dej-txo tus neeg sawv cev
Superplasticizer yog cov yas siv los txhim kho kev ua haujlwm ntawm mortar.Lawv ua hauj lwm los ntawm dispersing cement hais ntau tusyees thoob plaws hauv mortar sib tov, yog li txhim kho nws cov yam ntxwv ntws.
Superplasticizers feem ntau yog ntxiv rau hauv qhov sib tov ntawm mortar ntawm tus nqi ntawm 0.1% mus rau 0.5% ntawm cov ntsiab lus cement.Lawv txhim kho kev ua haujlwm ntawm cov mortar, ua kom yooj yim rau kev thov thiab ua tiav ib qho du, txawm nto.
Npaj-mix mortar yog cov khoom siv hauv tsev nrov uas tau siv dav hauv ntau yam kev tsim kho.Nws muaj kev sib xyaw ntawm cov cement, xuab zeb thiab dej, nrog rau ntau yam tshuaj ntxiv siv los txhim kho nws cov kev ua tau zoo thiab kav ntev.
Qee qhov tseem ceeb ntawm cov tshuaj ntxiv uas siv rau hauv cov khoom sib xyaw ua ke muaj xws li retarders, plasticizers, dej tuav cov neeg ua haujlwm, cov khoom siv cua nkag mus, cov accelerators thiab superplasticizers.Cov additives no tau ua tib zoo xaiv los txhim kho kev ua tau zoo, txo lub sijhawm teem sijhawm, nce dej tuav thiab txhim kho lub zog thiab kav ntev ntawm cov khoom tiav.
Los ntawm kev nkag siab txog lub luag haujlwm ntawm txhua yam tshuaj ntxiv, cov kws tshaj lij kev tsim kho tuaj yeem xaiv qhov tseeb ntawm cov khoom sib xyaw ua ke rau lawv qhov project tshwj xeeb thiab xyuas kom nws ua tau raws li nws cov kev ua tau zoo thiab kev ua haujlwm ntev.
Post lub sij hawm: Sep-26-2023