Yuav ua li cas kom tswj tau lub sijhawm tso tawm ntawm polycarboxylate superplasticizer kom raug?

Yuav ua li cas kom tswj tau lub sijhawm tso tawm ntawm polycarboxylate superplasticizer kom raug?

Nyob rau hauv daim ntawv thov ntawm qhob admixtures, lub sij hawm tso tawm ntawm slump-preserving tus neeg saib xyuas yog ib qho tseem ceeb parameter, uas ncaj qha cuam tshuam rau kev ua hauj lwm kev ua tau zoo thiab lub zog ntawm cov pob zeb. Yog li, yuav ua li cas thiaj li ua rau lub sijhawm tawg yog ib teev tom qab pib? Qhov no xav kom peb nkag siab txog thiab hloov kho los ntawm ntau yam.

Kev ua tiav kev tswj xyuas meej ntawm lub sijhawm tso tawm yog qhov tseem ceeb hauv kev siv cov pob zeb sib xyaw, vim nws cuam tshuam ncaj qha rau kev ua tau zoo thiab kev txhim kho lub zog ntawm cov pob zeb. Txhawm rau ncua sijhawm tso tawm mus rau ib teev tom qab pib, ntau yam thiab cov txheej txheem yuav tsum tau txiav txim siab thiab kho kom tiav.

Ib txoj hauv kev zoo yog kev siv cov cawv niam cov dej cawv, uas ua kom cov dej txo qis ua ntej tso tawm, tsim cov xwm txheej rau ncua kev tso tawm slump. Nws tseem yog ib qho tseem ceeb kom tswj tau cov kua qaub ntawm qhov qis-tso tawm kom tsis pub tshaj 20 kilograms.

Ntxiv cov lipids sib txawv yog lwm txoj hauv kev los kho lub sijhawm tso tawm slump. Los ntawm kev xaiv cov lipid tsim nyog thiab kho nws qhov ntau npaum li cas, kev tswj xyuas meej ntawm lub sijhawm tso tawm tuaj yeem ua tiav raws li ntau yam lipids muaj qhov sib txawv reactivities.

Cov txheej txheem kev hloov kho kuj tseem ceeb thiab ntau yam cuam tshuam rau lub sij hawm poob qis-tso tawm ntawm cov khoom, suav nrog qhov hnyav molecular ntawm cov slump-retaining agent, acid rau ether ratio, thiab ester hom thiab ntau npaum li cas. Txhawm rau ncua lub sijhawm tso tawm slump, nce qhov hnyav molecular ntawm slump tuav tus neeg sawv cev, txo cov kua qaub rau ether piv, thiab siv cov esters tshwj xeeb tuaj yeem txiav txim siab. Ntawm qhov tod tes, siv cov lipids sib txawv tuaj yeem ua tiav qhov tshwm sim thaum ntxov thiab maj mam tso tawm yog tias xav tau thaum ntxov thaum tswj kev ua haujlwm tau zoo.

Hauv kev xaus, kev ua tiav qhov kev tswj xyuas meej ntawm lub sij hawm tso tawm yuav tsum muaj kev txiav txim siab ntawm ntau yam thiab txoj hauv kev, suav nrog kev siv cov cawv niam, xaiv cov lipids, thiab cov txheej txheem hloov. Los ntawm kev siv cov tswv yim tshawb fawb thiab tsim nyog, cov kev xav tau ntawm cov phiaj xwm sib txawv tuaj yeem ua tau raws li kev tswj xyuas meej txog lub sijhawm tso tawm.