Daim ntawv thov txheej xwm thiab cov teeb meem uas twb muaj lawm ntawm polycarboxylate dej txo tus neeg sawv cev

Daim ntawv thov xwm txheej thiab cov teeb meem ntawm Polycarboxylic Acid Dej txo tus neeg sawv cev

Ni Lin

Daim ntawv thov xwm txheej thiab cov teeb meem ntawm Polycarboxylic Acid Dej txo tus neeg sawv cev

Ni Lin

(Liaoning Petrochemical Planning and Design Institute Co., Ltd, Shenyang 110004, Liaoning)

Cov xwm txheej tam sim no thiab cov teeb meem ntawm polycarboxylic acid dej txo tus neeg saib xyuas raug tshuaj xyuas, thiab nws tau txiav txim siab tias kev sib txuas ntawm cov ntsiab lus siab polycarboxylic acid dej txo tus neeg sawv cev los ntawm kev siv cov qauv tsim ntawm cov qauv molecular ntawm polycarboxylic acid dej txo tus neeg sawv cev yog cov kev taw qhia ntawm kev txhim kho yav tom ntej. ntawm polycarboxylic acid dej txo tus neeg sawv cev.

Dej txo tus neeg sawv cev; Polycarboxylic acid; Molecular qauv

Piv nrog cov tshuaj naphthalene, melamine thiab sulfamic acid dej txo cov neeg ua haujlwm, qhov zoo ntawm polycarboxylic acid dej txo tus neeg sawv cev pw hauv nws cov kev sib raug zoo thiab kev ua haujlwm zoo nrog cov pob zeb, muab lub zog siab thiab kav ntev rau cov cement, thiab polycarboxylic acid cov dej txo cov neeg ua haujlwm tau zoo heev. kev ua tau zoo thiab kev tiv thaiv ib puag ncig cov yam ntxwv, uas tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev tsim vaj tsev pob zeb. Polycarboxylic acid dej txo tus neeg sawv cev yog acrylic acid los yog methacrylic acid raws li lub ntsiab saw, grafted nrog txawv sab saw lengths ntawm polyether, los yog maleic anhydride raws li lub ntsiab saw grafted nrog txawv sab saw lengths ntawm polyether npaj, uas yog hais tias, saum toj no ob. Cov txheej txheem hluavtaws yog siv rau cov khoom lag luam hauv qab ntawm cov khoom siv polyether ntawm ethylene oxide, xws li polyethylene glycol monomethyl ether, allyl cawv polyoxyethylene / polyoxypropylene ether, isopentenol ethoxylated ethylene oxide ether, isobutyl cawv ethoxylated ether thiab lwm yam. polyoxyethylene ether, isobutylene cawv polyoxyethylene ether, thiab lwm yam.

1 Kev tshawb fawb hauv tsev thiab txawv teb chaws ntawm polycarboxylic acid dej txo tus neeg sawv cev
1.1 Kev tshawb fawb txawv teb chaws ntawm polycarboxylic acid dej txo tus neeg sawv cev
Nyob rau hauv lub tshav pob ntawm high-efficiency dej txo tus neeg saib xyuas, txawv teb chaws kev tshawb fawb cov tsev kawm ntawv tau ua kom pom tseeb ntawm kev tshawb fawb los ntawm naphthalene system ntawm high-efficiency dej txo tus neeg saib xyuas teb rau polycarboxylic acid system ntawm high-kev ua tau zoo dej txo tus neeg saib xyuas teb, yog li cov polycarboxylic acid dej txo tus neeg saib xyuas Tebchaws Europe, Tebchaws Asmeskas, Nyiv thiab lwm lub tebchaws tam sim no yog lub hom phiaj ntawm kev ua haujlwm siab dej txo tus neeg sawv cev ntawm cov kev taw qhia ntawm kev kawm, thiab tau muab tso rau hauv kev lag luam ntau hom kev ua haujlwm siab dej txo tus neeg sawv cev. [1-3]. Los ntawm kev tshawb fawb ntawm cov ntawv xov xwm txawv teb chaws nyob rau xyoo tas los no tau luam tawm cov ntaub ntawv ua tau zoo ntawm cov dej txo tus neeg sawv cev tuaj yeem pom, Tebchaws Europe, Tebchaws Asmeskas thiab Nyij Pooj cov kws tshawb fawb luam tawm los ntawm polycarboxylic acid system ntawm high-efficiency dej txo tus neeg sawv cev daim ntawv thov kev taw qhia ntawm cov ntawv tshawb fawb tshawb fawb tau nce xyoo los ntawm lub xyoo, lub hom phiaj ntawm kev tshawb fawb yog tsom rau yuav ua li cas los txhim kho qhov yooj yim ntawm kev ua si ntawm cov pob zeb, thiab tom qab hardening ntawm lub zog ntawm cov pob zeb, thiab lwm yam kev siv ntawm cov dej txo tus neeg sawv cev, thiab lwm yam. .

Nyob rau hauv daim teb ntawm polycarboxylic acid dej txo tus neeg sawv cev daim ntawv thov, Nyiv yog tam sim no ua ntej ntawm tag nrho cov lub teb chaws nyob rau hauv lub ntiaj teb no, thiab cov kev tshawb fawb thiab daim ntawv thov cov txiaj ntsig tau dhau los ua neeg paub tab. Xyoo 1995, kev siv polycarboxylic acid dej txo tus neeg sawv cev hauv Nyij Pooj tau tshaj li cov tshuaj naphthalene-raws li kev ua haujlwm siab dej txo tus neeg sawv cev, thiab los ntawm 2001, tus nqi ntawm polycarboxylic acid dej txo tus neeg saib xyuas tau suav txog ntau dua 80% ntawm kev siv high-efficiency dej txo tus neeg saib xyuas, cov npe nto moo suav nrog Kao, Nippon Paper [4], thiab lwm yam. Thaum pib ntawm 1990s, Tebchaws Europe thiab Tebchaws Meskas kuj tau pib tsom mus rau kev txhim kho polycarboxylic acid dej txo tus neeg sawv cev, thiab cov nqi. ntawm polycarboxylic acid dej txo tus neeg saib xyuas kuj yog li ntawm 80% ntawm kev siv cov dej txo cov neeg ua haujlwm siab hauv xyoo 2008, uas yog thawj zaug uas polycarboxylic acid dej txo tus neeg sawv cev tau siv hauv ntiaj teb. Xyoo 2008, kev siv cov tshuaj polycarboxylic acid dej txo tus neeg sawv cev suav txog li 20% ntawm tag nrho cov dej txo tus neeg sawv cev hauv Tebchaws Europe thiab Tebchaws Meskas [5], thiab muaj ntau lub npe nrov, xws li GRACE Company hauv Tebchaws Meskas, SIKA Company hauv Switzerland thiab lwm yam. Lub ntsiab daim ntawv thov ntawm polycarboxylic acid dej txo cov neeg sawv cev hauv Tebchaws Europe, Amelikas thiab Nyij Pooj suav nrog kev sib xyaw ua ke ntawm cov pob zeb ua kom muaj zog, siab fluidity self-compacting pob zeb, ultra-siab lub zog pob zeb, pob zeb loj, pob zeb tshwj xeeb thiab cov pob zeb tsis sib haum hauv dej. Piv nrog rau lwm cov dej txo cov neeg ua haujlwm siab, qhov zoo ntawm polycarboxylic acid dej txo tus neeg sawv cev yog: cov dej txo qis, me me poob ntawm cov pob zeb, qis viscosity ntawm pob zeb thiab yooj yim ntws. Yog li ntawd, polycarboxylic acid dej txo cov neeg ua haujlwm tau nce ntxiv hauv kev ua haujlwm engineering. Piv txwv li, nyob rau hauv cov teb chaws Europe thiab lub tebchaws United States nyob rau hauv lub teb ntawm engineering daim ntaub ntawv, los ntawm kev siv cov polycarboxylic acid dej txo tus neeg sawv cev tau tsim muaj peev xwm tsim ultra-high-lub zog thiab high-kev ua tau zoo pob zeb saum toj no C100, thiab nyob rau hauv high-sawv vaj tse, los ntawm txoj kev siv fiber ntau tuaj yeem ua kom cov pob zeb ua kom muaj zog nce mus txog 200 MPa.

1.2 Kev tshawb fawb txog dej txo tus neeg sawv cev nrog polycarboxylic acid hauv Suav teb
Tuam Tshoj siv naphthalene-raws li high-efficiency dej txo tus neeg sawv cev rau txog 20 xyoo los yog li ntawd, qhov tsis zoo ntawm hom kev txo dej no yog tias cov dej txo qis, qhov poob qis ntawm cov cement yog nrawm heev, yog li nws nyuaj rau kev ua kom tau raws li qhov sib txawv. kev tsim kho cov cai hauv kev siv engineering. Tsis tas li ntawd, tus nqi raw khoom ntawm cov khoom siv hluavtaws naphthalene txo qis yog nce thiab cov peev txheej tau txo qis, yog li ntawd, kev txhim kho ntawm lwm txoj hauv kev rau naphthalene dej txo tus neeg sawv cev nrog kev ua tau zoo dua thiab tus nqi qis dua yog qhov nrawm dua. Tam sim no, los ntawm kev sib zog ua haujlwm tas li ntawm cov kws tshawb fawb, Tuam Tshoj tau ua tiav thiab tsim cov khoom ua tau zoo polycarboxylic acid dej txo tus neeg sawv cev, thiab tau dhau los ua ib hom tseem ceeb hauv kev ua vaj tse ntxiv hauv Suav teb. Tau ntau xyoo, cov tuam haujlwm tseem ceeb hauv Suav teb tau sim los txhawb kev siv cov pob zeb ua haujlwm siab los ntawm kev hloov kho cov qauv thiab ua cov kev sim ua haujlwm, tab sis qhov kev faib ua feem ntawm cov pob zeb ua tau zoo nyob rau hauv tag nrho cov kev siv pob zeb hauv kev tsim kho. tseem tsis siab, thiab raws li kev txheeb cais, tus nqi ntawm cov pob zeb ua haujlwm siab yog tsawg dua 1% ntawm tag nrho cov kev siv txhua xyoo ntawm cov pob zeb, thiab daim ntawv thov cheeb tsam yog txwv rau cov pob zeb loj-ntev, ultra-high-rise vaj tse. thiab cov choj tseem ceeb ntawm ntug dej hiav txwv.

Nyob rau hauv lub ntsej muag ntawm Tuam Tshoj tus loj-kev ua tau zoo dej txo tus neeg sawv cev ua lag luam, muaj ntau tshaj kaum zoo-paub txawv teb chaws qhob admixture tuam txhab uas muag.