Dej ntsuab additives mus rau hauv lub slurry noj thiab cov qauv ntawm cov kev siv

Lower kub tej zaum yuav tsawg sai hardening ntawm qhob. Dej freezes nyob rau hauv xws tej yam kev mob, thiab cov co ntawm cov phau ntawv yog tshem tawm.

qhov yuav tsum tau siv

Rau vaj tse, xws dab yog undesirable vim hais tias lawv adversely cuam tshuam rau lub zog. Raws li ib tug tshwm sim, tus qauv yuav xoob, thiab nws txias kuj yog neeg pluag. Nyob rau hauv thiaj li yuav xyuas kom meej li qub curing thaum uas tsis muaj kub, nws yog tsim nyog los noj uas tsim nyog ntsuas uas ua rau kom cov dej nyob rau hauv cov kua theem.

General hauj lwm dej ntsuab additives

Dej ntsuab additive nyob rau hauv MAAs cug ntxiv ntawm qis kub. Lawv yog cov kua, uas muaj peev xwm muaj ib tug yellowish los yog lub teeb-grey tint, thiab muaj peev xwm kuj yuav kiag li tsis muaj kob. Cov sib tov muaj ib tug ntom nyob rau hauv cov kab kev los ntawm 1.4 kilograms ib liter. Raws li rau qhov loj feem ntawm calcium nitrate, nws yog hom twg los ntawm 42 mus rau 45%. Cov yam ntxwv yuav sib txawv, nyob ntawm seb lub hom substance.

Dej ntsuab additives mus rau hauv lub slurry yog ntxiv yog tias tsim nyog ua rau kom cov kev mus ncig ntawm lub nyob tus yeees, uas zoo heev tswj lub tsim ntawm cov yam ntxwv hais. Nyob rau hauv cov mixtures muaj ib tug xeb inhibitor, uas tiv thaiv lub cuab lub zog tuav los ntawm oxidation. Tom qab rau qhov sib ntxiv ntawm lub piav muaj pes tsawg leeg mortar nreg zog nyob rau hauv ib tug luv luv lub sij hawm, thiab cov dej kuj ntawm cov khoom qab.

Txoj kev siv ntawm additives nyob rau hauv qhov kev npaj ntawm cov tshuaj

Thaum dej ntsuab additives ntxiv mus rau hauv lub slurry, lub plasticizer siv nyob rau hauv parallel, xuab zeb thiab xis mas. Nws yog ntshaw kom ntxiv hais tias muaj pes tsawg leeg ua ke nrog cov dej, txij li thaum cov kua dej ntsuab muaj pes tsawg leeg muaj peev xwm sawv ntawm cov hloov lub nws cov dej.

Tag nrho cov khoom xyaw yog zoo tov, thaum lub sij hawm uas lub sij hawm koj yuav tsum tau siv ib tug qhob tov. Qhov no theem yuav tsum kav rau cov sij hawm. Qhov kawg no yog ib tug homogeneous sib tov. Lub degree ntawm uniformity yuav yog nyob ntawm seb nws lub sij hawm thiab qhov zoo tshaj ntawm lub pob zeb ua tov. Tus nqi ntawm cov additive yuav tsum sib npaug zos rau lub ntim uas yog sau npe rau hauv lub ntim. Feem ntau cov feem ntau nws yog 0.2% los ntawm lub ntim ntawm MAAs by luj. Nws yog ib qho tseem ceeb los ua tim nyob rau hauv lub siab hais tias qhov no npaum li cas raws li ib tug kub nqi teev nyob rau hauv cov lus qhia.

Thaum dej ntsuab additives ntxiv mus rau hauv lub slurry nyob rau hauv lub tsev, nws yog ib qho tseem ceeb los xav txog tias nrog zuj zus lawm kub ntawm cov khoom ntim yuav tsum tau nce. Nws yog ib qho tseem ceeb coj mus rau hauv tus account uas nyob tus yeees ntawm 0.05% sau raws nkaus Ii ib tug degree. Cov tshuaj no feem ntau yog teev nyob rau hauv grams. Yog hais tias cov nqi no yog qhia nyob rau hauv millimeters, los mus txiav txim rau qhov nyiaj ntawm nws qhov hnyav muaj pes tsawg leeg yuav tsum tau muab faib los ntawm 1,45. Nyob rau hauv lub kawg, yuav tsum tau los ua tus uas yuav tsum tau ntim, qhia nyob rau hauv millimeters. Yuav tsuas ntsuas yuav tsum tau npaum li cas ntawm sib tov, thiab ces kom paub nws mus rau hauv cov tshuaj.

Dej ntsuab additive nyob rau hauv grout, cov lus teb uas lom zem ntau zoo ntxiv xwb thaum uas tsis muaj kub ntawm qhov chaw. Thov cov mixtures nyob rau hauv txawv tej yam kev mob tsis tsim nyog. Lub Khoos Loos Tsev ntsiab thiab qhob khoom yuav tsum tau moisten lub ob hnub, nws yuav tiv thaiv kom qhuav tawm.

tau ntawm potash

Potash yog siv nyob rau hauv kev tsim kho raws li dej ntsuab additive. Nws kuj hu ua poov tshuaj carbonate, technical. Qhov ntawd yuav tsum yuav nyob rau hauv daim ntawv ntawm ib tug crystalline hmoov, uas yog yus muaj los ntawm ib qho zoo heev solubility nyob rau hauv cov dej. Nyeem tov freezes ntawm ib tug kub uas yog sib npaug rau -36,5 degrees qhia. Potash yog tau zoo heev leeb lub hardening vaj tse thiab nplaum tus cwj pwm.

Paub meej ntawm muaj pes tsawg leeg yuav tsum pab yog tias thaum lub sij hawm casting ua ntej nkag mus rau hauv lub dag lub zog ua vaj tse kub hauv qab no yog -25 degrees. Yog hais tias muaj yog ib tug yuav tsum tau ntxiv dag zog rau te kuj ua vaj tse, nws yog tsim nyog los ntxiv kua sodium iav.

Tej dej ntsuab additives yog nkag tau rau hauv cov slurry, feem ntau yog rau ib tug luv luv lub sij hawm ntawm solidification. Thaum zoo li no tus txheej txheem yog suab ywj siab ntawm lub ambient kub. Potash ua raws li ib tug nruab nrab additives, uas tsis muaj feem xyuam rau lub haum. Los ntawm tej lub kub theem ntawm cov tshuaj yeeb dej caw txaus yuav tsub kom. Yog li, yog hais tias tus tshuaj ntsuam ntawm tus pas ntsuas kub yog nyob rau hauv lub chav 0 -5 degrees, ib puas kilograms ntawm MAAs yuav tsum tau 5 mus rau 6 kg ntawm poov tshuaj carbonate.

Thaum kub nyob rau hauv lub chav -6 rau -10 degrees dej ntsuab additive yuav tsum tau siv nyob rau hauv tus nqi ntawm cov los ntawm 6 mus rau 8 kilograms ib puas kilograms ntawm MAAs. Whereas ntawm -11 rau -15 degrees potash noj yog nce nyob rau hauv lub chav 8 mus rau 10 kilograms ib tib nqi ntawm MAAs tivthaiv.

Xyuas

Raws li tau txais kev pab, dej ntsuab additives mus rau hauv lub slurry, cov ndlwg ntawm uas tau raug hais saum toj no, yog nkag tsis tau tsuas yog rau cov kev npaj ntawm qhob hmoov sib tov. Ntawm lwm yam, lawv yuav tsum tau siv nyob rau hauv lub khaub-ncaws nyias vaj tse, qhov siv thiab ua cov tsheb hais, nws plaster, raws li zoo raws li lub tsim ntawm lub pavement.

Nyob rau hauv kev lag luam, dej ntsuab additives yog siv nyob rau hauv kev tsim kho ntawm cov txuas hniav, vaj tse rau txawv hom phiaj, roj thiab cov nkev platforms, dams thiab lwm yam. Siv cov compositions yuav txo tau qhov kev siv lub sij hawm, raws li tau zoo raws li txo tau tus nqi ntawm lub tsev tus nqi vim muaj kuab siv ntawm ua hauj lwm thiab cov khoom siv. Nws yog ib heev nrov mus rau lwm cov kev pab thiab cov kev builder.

xaus

Yog hais tias koj yuav tsum tau siv dej ntsuab additives mus rau hauv lub slurry, ntsev yuav tsim ua ke nrog cov co ntawm qhob khoom. Ua ntej yuav siv tshuaj nrog lub piav lub hom phiaj yuav tsum tas paub nrog cov yam ntxwv thiab cov yam ntxwv ntawm cov khoom xyaw sib tham saum toj no.