Dab tsi yog qhov kev txiav txim thiab cov khoom ntawm polycarboxylic acid superplasticizer?

 

 

BORIDA COMPANY PROFILE

BORIDA Ntiaj teb no
Revolutionizing koj cov pob zeb, Reinventing Building Sustainability.

 

Tsim los ntawm 2007 nrog rau npe peev ntawm 105 lab yuan, peb tshwj xeeb hauv kev sib xyaw ua ke. Peb lub hauv paus tsim khoom hauv Baisha Industrial Park npog ntau dua 40 daim av thiab tsim tau 200, 000 tons hauv ib xyoos, muab cov haujlwm tsim kho loj thoob plaws cheeb tsam sab hnub poob.

 

50+

tus kws kho mob

 

18+

xyoo kev

 

200, 000 tons

Kev Muaj Peev Xwm Txhua Xyoo

 

40 kwg

Tsim Nyog Thaj Chaw

1. Daim ntawv Adsorption thiab Dispersion:Polycarboxylate high-efficiency superplasticizers tsim azigzag adsorption xeevnyob rau saum npoo ntawm cement. Polycarboxylate polymer muaj ntau yamether sab chains. Hauv dej, cov pa oxygen hauv ether bonds reacts nrog dej molecules los tsimhydrogen bonds, tsim ibHighly dispersive hydrophilic tiv thaiv zaj duab xisthaum adsorbed rau ntawm cement nto. Lub ntsiab saw tseem tuaj yeemthauj tog rau nkojmus rau cov cement hais, uas ua rau ib tug polymer molecule adsorption txheej ntawm ib co thickness ntawm cov cement particle nto. Thaum ob lub ntsiab lus nrog polymer molecule adsorption khaubncaws sab nraud povtseg mus rau ib leeg, yog hais tias qhov deb ntawm cov particle nto yog tsawg tshaj li ob npaug ntawm cov thickness ntawm cov adsorption txheej, ob txheej yuav interacting, tsim.cov teebmeem entropythiabpenetration repulsion cuam tshuam, yog li tuav lub dispersion stability ntawm cov hais thiab tsim ib tugsteric hindrance effect. Tsis tas li ntawd, carboxylate ions impart atus nqi tsis zoorau cov cement hais, ua rauelectrostatic repulsionthiab ntxiv dispersing cov cement hais. Cov yam tseem ceeb no ua rau cov khoom siv polycarboxylate high-efficiency superplasticizers kom tawg tau zoo thiab ruaj khov cov khoom cement.

2. Kev Ua Haujlwm Ntog ntawm Pawg Ua Haujlwm:Cov macromolecular chains ntawm polycarboxylate high-efficiency superplasticizers feem ntau muaj ntau yamcov pab pawg nquag, zoo lipolyethylene oxide chains, carboxyl pawg (-COOH), sulfonic acid pawg (-SO3H), Hydroxyl pawg (-OH), amine pawg (-NH2), thiabpolyether pawg (-OR) n. Cov pawg polar no tuaj yeem txhim kho kev tawg thiab ntws los ntawmadsorption, dispersion, ntub dej, thiablubricationcuam ​​tshuam, txo cov kev sib txhuam tsis sib haum ntawm cov cement hais thiab txo covdawb zogntawm cement-dej interface, yog li txhim kho covkev ua haujlwmntawm freshly mixed qhob. Los ntawm kev sib cuag ntawm cov cement particles thiab dej, cov cement tuaj yeem hydrate tag nrho. Thaum lub sij hawm diffusion ntawm cement hais, lubdej dawbib puag ncig aggregates raug tso tawm, txhim kho kev ua haujlwm thiab txo cov ntsiab lus dej uas yuav tsum tau ua.

Cov yam ntxwv ua haujlwm:

1. Tsawg Dosage thiab High Performance:Lub dispersion thiab dej-txo mechanism ntawm polycarboxylate high-efficiency superplasticizers yog tshwj xeeb. Txawm hais tias qhov adsorption ntawm qhov chaw ntawm cov cement particle yog tsawg, ntau sab chains tuaj yeem tsim ib qhosteric hindrance effect, tso cai rau cov nyhuv plasticizing zoo txawm tias tsawg npaum li cas. Feem ntau, qhov ntau npaum li cas yog hais txog{{0}}.1% rau 0.3%los ntawm qhov hnyav ntawm cov khib nyiab, uas ua tiav cov dej txo qis piv rau ntawm{{0}}.6% rau 0.9%naphthalene-based superplasticizers. Nyob rau hauv ib koob ntawm{{0}}.2% rau 0.3%(active tivthaiv) ntawm tag nrho cov cementitious cov ntaub ntawv, dej txo tau ncav cuag25% mus rau 35%, nrog rau qee kis ntau dhau40%.

2. Muaj zog Plasticity Retention thiab Tsawg Slump Poob:Polycarboxylate high-efficiency superplasticizers tswj tau zoopoob poobntawm pob zeb sib tov nyob rau lub sij hawm, nrog me ntsis cuam tshuam rau lub sij hawm hardening. Nyob rau tib yam raw khoom tej yam kev mob, lubpoob ruaj khovntawm polycarboxylate superplasticizers yog qhov zoo dua li ntawm naphthalene-based superplasticizers, thiab tag nrho lub xeev ntawm cov pob zeb sib tov kuj zoo dua, nrog qhov tshwm sim tsawg heev.los ntshav, cais, los yogncua kev teeb tsa. Qhob nrog siab flowability npaj siv polycarboxylate superplasticizers tseem tuaj yeem ua tau raws li kev xav tau tom qab1 hnu.

3. Zoo Adaptability:Lub adaptability rau ntau yam cements thiab cov ntaub ntawv ntxiv yog superior rau cov tsoos superplasticizers, uas yog txiav txim los ntawm nws cov qauv molecular tshwj xeeb. Cov qauv molecular ntawm polycarboxylate high-performance superplasticizers yogtxhuam zoo li, characterized los ntawm ib tug loj tus naj npawb ntawmcov pab pawg nquagntawm cov saw tseem ceeb, suav nrogsulfonic acid pawg (-SO3H), carboxylic acid pawg (-COOH), thiabHydroxyl pawg (-OH). Ntev sab chains, xws lipolyoxyalkylene pawg (-CH2CH2O)mR, ua lub luag haujlwm tseem ceeb hauv kev tawg. Feem ntau, nws ntseeg tau tias cov pab pawg tsis zoo sulfonic thiab carboxylic acid tuaj yeem adsorb rau ntawm cov cement particle qhov chaw, muab anchoring thiab ib co degree ntawmelectrostatic repulsion. Cov saw ntev ntev txuas rau hauv kev daws, ua kom muaj zogsteric hindrance effect, uas muaj txiaj ntsig zoo hauv kev faib cov cement particles thiab tsis tshua muaj kev cuam tshuam rau kev cuam tshuam ntawm electrolytes piv rau cov teebmeem electrostatic.

4. Cov txheej txheem tsim khoom tsis muaj pa phem:Cov txheej txheem ntau lawm tsis siv ib puag ncig kev puas tsuaj raw khoom xws liformaldehyde. Nws tsis muaj teeb meem kev noj qab haus huv rau tib neeg thiab tsis ua phem rau ib puag ncig thaum tsim khoom thiab siv. Nyob rau hauv sib piv, naphthalene-raws li thiab lwm yam thib ob tiam superplasticizers yog ib chav kawm ntawm cov tshuaj hluavtaws cov ntaub ntawv uas ho ua phem rau ib puag ncig, nrog cov qauv muaj kuab paug nyob rau hauv lub ntau lawm thiab siv theem. Cov tshuaj phem xws li formaldehyde thiab naphthalene, uas yuav nyob twj ywm hauv superplasticizers, tuaj yeem maj mam tawm ntawm cov pob zeb, ua rau muaj kev phom sij rau ib puag ncig thiab kev noj qab haus huv. Tsis tas li ntawd, ntxivslaglos yogya tshauvtuaj yeem siv los hloov cov cement, yog li txo cov nqi.

5. High Design Flexibility of Performance:Cov qauv molecular thiab kev ua tau zoo ntawm polycarboxylate high-performance superplasticizers tuaj yeem tsim los ua kom tau raws li qhov xav tau tiag tiag ntawm kev ua vaj tse. Cov molecules feem ntau nthuav tawm atxhuam zoo li qauv, characterized los ntawm ntau yammuaj zog polar active pab pawgnyob rau hauv lub ntsiab saw, nrog hydrophilic active pab pawg nyob rau hauv ntau dua thiab luv, tsawg hydrophobic pawg nyob rau sab chains. Cov no yuav tsum tshwm sim nyob rau hauv haum proportions ntawm lub ntsiab saw ntawm lub polymer.

6. Ntau yam ntawm raw khoom xaiv:Ntau hom co-monomers tuaj yeem xaiv tau, txhim kho covyoojntawm kev tswj ntau lawm thiab muab kev dav davkev tshawb fawb thiab kev loj hlobqhov chaw.