Dab tsi yog Kev faib tawm ntawm Cov Khoom Siv Dej Txias Dej?

Raws li cov dej-txo thiab dej-ua kom muaj peev xwm ntawm cov pob zeb ua dej txo qis, lawv tau muab faib ua hom hauv qab no:

Ordinary Dej Reducer, kuj hu uaPlasticizer:

Cov dej txo qis tsis tsawg dua 8%.

Sawv cev los ntawm lignosulfonate.

High-Efficiency Dej Reducer:

Tus nqi txo dej tsis tsawg dua 14%.

Xws li naphthalene-based, melamine-based, amino sulfonate-based, aliphatic-based hom.

High-performance Dej Reducer:

Tus nqi txo dej tsis tsawg dua 25%.

Ua los ntawm polycarboxylate-raws li dej reducers.

Nws tuaj yeem muab faib ua hom zog thaum ntxov, hom qauv, thiab hom retarding.

Classification los ntawm Chemical Composition:

Lignosulfonate High-Efficiency Water Reducer

Naphthalene-based High-Efficiency Water Reducer

Melamine-based High-Efficiency Water Reducer

Amino Sulfonate High-Efficiency Dej Reducer

Fatty Acid Salt High-Efficiency Water Reducer

Polycarboxylate High-Efficiency Dej Reducer

Lignosulfonate Water Reducers

Xws li calcium lignosulfonate, sodium lignosulfonate, thiab magnesium lignosulfonate, nrog calcium lignosulfonate yog siv dav tshaj plaws. Lignosulfonate high-efficiency dej reducers muaj cov nyhuv retarding ntawm pob zeb. Yog tias qhov ntau npaum li cas siab dhau los yog qhov kub qis, cov nyhuv retarding tseem ceeb dua, uas tuaj yeem txo lub zog ntawm cov pob zeb. Hom dej reducer no tuaj yeem siv rau kev ua vaj tse dav dav, tshwj xeeb tshaj yog tsim rau thaj chaw loj hauv qhov dej, kev tsim cov ntawv nplaum, cov pob zeb ua vaj tse, thiab kev tsim kho lub caij ntuj sov. Rau kev tsim kho lub caij ntuj no, nws yuav tsum tsis txhob siv ib leeg tab sis ua ke nrog cov neeg sawv cev thaum ntxov los yog cov tshuaj tiv thaiv kab mob. Nws kuj tsis tsim nyog rau cov qhob-kho cov pob zeb thiab cov pob zeb prestressed ib leeg kom tsis txhob deg loosening tom qab chav kho.

Naphthalene-based High-Efficiency Water Reducers

Naphthalene-raws li high-efficiency dej reducers yog condensation khoom ntawm aromatic sulfonates thiab formaldehyde. Cov khoom tseem ceeb yog naphthalene los yog naphthalene homologs sulfonate condensed nrog formaldehyde, teej tug mus rau anionic surfactants.

Cov yam ntxwv ntawm naphthalene-raws li dej reducers muaj xws li hydrophobic lub ntsiab saw uas muaj dicyclic los yog polycyclic aromatic hydrocarbons txuas los ntawm methylene pawg, thiab hydrophilic functional pawg txuas nrog lub nplhaib aromatic los ntawm -SO3M. Ib qho tseem ceeb Performance index ntawm polynaphthalene sulfonates yog cov ntsiab lus ntawm NaSO4.

Naphthalene-raws li dej reducers feem ntau muaj qhov txo qis ntawm 15% thiab 25% ntawm qhov pom zoo, nrog rau qhov tsawg kawg nkaus rau lub sijhawm teeb tsa. Lawv muaj cov cuab yeej tsis tshua muaj huab cua nkag thiab txhim kho pob zeb ua kom muaj zog.

Melamine-raws li High-Efficiency Water Reducers

Melamine-raws li dej reducers yog dej-soluble polymers. Lub ntsiab tivthaiv yog sulfonated melamine formaldehyde condensate, ib qho anionic, thaum ntxov zog, tsis-cua-entraining high-efficiency dej reducer. Cov dej txo qis tuaj yeem ncav cuag 25%.

Melamine-raws li high-efficiency dej reducers yog cua-entraining uas tsis muaj retarding nyhuv. Lawv cov dej txo qis yog piv rau SNF cov dej txo qis. Lawv muab cov txiaj ntsig zoo ntawm cov pob zeb, tab sis cov tsoos melamine pob zeb cov dej txo qis tuaj yeem ua rau poob sai sai. Vim lawv cov xim tsis muaj xim, tsis tshua muaj huab cua nkag mus rau cov yam ntxwv, lawv tsim nyog rau kev tsim cov mortar qhuav, xim pavement cib, thiab cov pob zeb ncaj ncees.

Amino Sulfonate Series High-Efficiency Water Reducers

Amino sulfonate high-efficiency dej reducers, tseem hu ua ib lub nplhaib uas muaj ntxhiab hydrocarbon high-efficiency dej reducers, feem ntau muaj cov phenyl thiab methylene alternating pawg nyob rau hauv hydrophobic lub ntsiab saw ntawm lub polymer. Cov reducers no muaj cov qauv zoo li comb.

High-efficiency water reducers feem ntau muaj ntau npaum li cas ntawm 0.2%-0.5%, muab cov dej txo qis thiab qis qis qis. Thaum cov amino sulfonate dej reducer cov ntsiab lus siab, nws tuaj yeem ua rau cov ntshav ntau dhau thiab ua rau qeeb. Yog li ntawd, feem ntau, amino sulfonate qhob dej reducers yog compounded nrog naphthalene-raws li reducers los txhim kho cov adaptability ntawm naphthalene sulfonate rau cement thiab txhim kho cov slump tuav ntawm pob zeb.

Aliphatic Series High-Efficiency Dej Reducers

Aliphatic high-efficiency dej reducers feem ntau yog xa mus rau aliphatic hydroxy sulfonic acid condensates synthesized los ntawm acetone, sulfite, thiab formaldehyde. Aliphatic qhob dej reducers muaj ntau cov ntaub ntawv raw, tus nqi qis, thiab cov txheej txheem synthesis yooj yim. Lawv muaj cov dej txo qis uas tsis ua rau cov ntshav ntau dhau hauv cov pob zeb thiab muaj kev cuam tshuam tsawg heev rau lub sijhawm ua vaj tse. Cov dej txo qis no txhawb nqa thaum ntxov thiab tom qab lub zog ntawm cov pob zeb, tsis txhob crystallize nyob rau lub caij ntuj no, tsis yog huab cua-entraining, tsis tsim chlorides, tsis corrosive rau steel tuav, thiab yog ntau yoog mus rau ntau hom cement piv rau naphthalene- Raws li kev ua vaj tse dej reducers. Lawv tsim nyog rau kev tsim cov khoom siv precast.

Polycarboxylate Dej Reducers

Raws li high-efficiency dej reducers, polycarboxylate high-efficiency dej reducers feem ntau muaj cov dej txo qis ntawm 25%. Lawv muaj broad compatibility nrog cov ntaub ntawv hauv paus tab sis nqaim compatibility nrog aggregates. Thaum siv, lawv pom me ntsis kom tsis muaj kev poob qis thiab nthuav dav. Lawv muaj cov fluidity siab, tuav dej zoo, adhesion, thiab kev hloov pauv huab cua, tab sis xav tau cov kev qhia ntau dua.