Hmoov Latex—Ua kom lub kaw lus sib xws thiab nplua thaum sib tov ntub. Vim yog cov yam ntxwv ntawm cov polymer, qhov sib xyaw ua ke ntawm cov khoom sib tov ntub tau zoo dua heev, uas pab txhawb rau kev ua haujlwm; tom qab ziab, nws muab kev nplaum rau ntawm txheej du thiab ntom. Txuas, txhim kho qhov cuam tshuam ntawm xuab zeb, xuab zeb, thiab qhov hws. Hauv qab lub hauv paus ntawm kev xyuas kom meej tias muaj ntau ntxiv, nws tuaj yeem ua rau muaj zaj duab xis ntawm qhov sib txuas, kom cov nplaum pobzeb muaj qee qhov kev ywj pheej, txo cov modulus elastic, thiab nqus cov kev ntxhov siab thermal deformation rau ntau qhov. Yog tias muab dej rau hauv theem tom qab, yuav muaj kev ntxhov siab xws li kev tiv thaiv dej, qhov kub ntawm lub buffer, thiab cov khoom tsis sib xws deformation (cov coefficient deformation pobzeb 6 × 10-6 / ℃, cov cement concrete deformation coefficient 10 × 10-6 / ℃), thiab txhim kho kev tiv thaiv huab cua. Hydroxypropyl Methyl Cellulose HPMC—Muab kev khaws dej zoo thiab ua haujlwm tau zoo rau cov mortar tshiab, tshwj xeeb tshaj yog rau thaj chaw ntub. Yuav kom ntseeg tau tias qhov kev nce qib ntawm cov tshuaj tiv thaiv hydration, nws tuaj yeem tiv thaiv cov substrate los ntawm kev nqus dej ntau dhau thiab txheej saum npoo los ntawm kev evaporation. Vim nws cov khoom siv cua-entraining (1900g / L—-1400g / LPO400 xuab zeb 600HPMC2), qhov ceev ntawm cov nplais nplaum raug txo qis, txuag cov ntaub ntawv thiab txo cov elastic modulus ntawm cov mortar hardened.
Cov hmoov latex uas yaj tau los ntawm cov nplais pobzeb yog ib yam khoom siv uas ntsuab, tsis ua rau ib puag ncig puas tsuaj, txuag hluav taws xob hauv tsev, thiab muaj ntau yam zoo, thiab yog ib yam khoom siv tseem ceeb rau cov nplais pobzeb qhuav. Nws tuaj yeem txhim kho kev ua haujlwm ntawm cov nplais pobzeb, ua kom lub zog ntawm cov nplais pobzeb muaj zog dua, ua kom lub zog sib txuas ntawm cov nplais pobzeb thiab ntau yam khoom siv, txhim kho kev ywj pheej thiab kev ua haujlwm tau zoo, lub zog compressive, lub zog flexural, kev tiv taus kev hnav, kev tawv, thiab viscosity ntawm cov nplais pobzeb. Muaj peev xwm khaws dej thiab ua kom yooj yim. Kev ua haujlwm ntawm cov hmoov latex uas yaj tau los ntawm cov nplais pobzeb muaj zog heev, thiab cov hmoov latex uas yaj tau los ntawm cov nplais pobzeb muaj peev xwm sib txuas tau zoo thiab cov yam ntxwv tshwj xeeb. Yog li ntawd, lawv cov kev siv dav heev. Lub luag haujlwm ntawm hydroxypropyl methylcellulose ua lub luag haujlwm ntawm kev khaws dej, ua kom tuab thiab kev ua haujlwm hauv kev tsim kho thaum ntxov, thiab cov hmoov latex uas yaj tau los ntawm cov nplais pobzeb ua lub luag haujlwm ntawm lub zog hauv theem tom qab, uas ua lub luag haujlwm zoo heev hauv kev ruaj khov, kev tiv taus kua qaub thiab alkali ntawm qhov project. Cov nyhuv ntawm cov hmoov nplaum pobzeb uas tawg tau dua tshiab rau ntawm cov pob zeb tshiab: ua kom lub sijhawm ua haujlwm ntev dua thiab kho lub sijhawm kom txhim kho kev ua haujlwm ntawm cov dej, kom ntseeg tau tias cov cement muaj dej thiab txhim kho qhov tsis kam ntawm sag (hmoov roj hmab hloov kho tshwj xeeb) thiab txhim kho kev ua haujlwm (yooj yim siv Cov khoom siv yog kev tsim kho sab saum toj, yooj yim nias cov pobzeb rau hauv cov nplaum) lub luag haujlwm ntawm cov pob zeb tawv muaj kev nplaum zoo rau ntau yam khoom siv, suav nrog cov pob zeb ua vaj tse, plaster, ntoo, cov pobzeb qub, PVC txawm tias nyob rau hauv ntau yam huab cua, muaj peev xwm deformation zoo.
Qhov ntxiv cov hmoov latex uas yaj tau dua tshiab rau cov nplaum pobzeb muaj qhov cuam tshuam zoo heev rau kev txhim kho kev ua tau zoo ntawm cov nplaum pobzeb uas ua los ntawm cement, thiab muaj qhov cuam tshuam loj heev rau lub zog sib txuas, tiv taus dej, thiab tiv taus kev laus ntawm cov nplaum. Tam sim no, muaj ntau hom hmoov latex uas yaj tau dua tshiab rau cov nplaum pobzeb hauv khw, xws li cov hmoov latex uas yaj tau dua tshiab acrylic, cov hmoov styrene-acrylic, vinyl acetate-ethylene copolymers, thiab lwm yam. Feem ntau hais lus, cov nplaum pobzeb siv rau hauv cov nplaum pobzeb hauv khw Feem ntau cov hmoov latex uas yaj tau dua tshiab yog vinyl acetate-ethylene copolymers.
(1) Raws li qhov ntau ntawm cov cement nce ntxiv, lub zog qub ntawm cov hmoov latex redispersible rau cov nplais nplaum nce ntxiv, thiab tib lub sijhawm, lub zog nplaum tensile tom qab immersion hauv dej thiab lub zog nplaum tensile tom qab cua sov laus kuj nce ntxiv.
(2) Nrog rau kev nce ntxiv ntawm cov hmoov roj hmab uas tau tawg ua tej daim me me rau cov nplaum pobzeb, lub zog tensile ntawm cov hmoov roj hmab uas tau tawg ua tej daim me me rau cov nplaum pobzeb tom qab muab tso rau hauv dej thiab lub zog tensile tom qab cua sov laus nce ntxiv raws li ntawd, tab sis kev laus thermal Tom qab ntawd, lub zog tensile tau nce ntxiv ntau heev.
Vim nws cov yam ntxwv zoo nkauj thiab ua haujlwm xws li kev ruaj khov, tiv taus dej thiab yooj yim ntxuav, cov vuas ceramic tau siv dav: suav nrog phab ntsa, pem teb, qab nthab thiab pas dej ua ke, thiab lwm yam, thiab tuaj yeem siv tau ob qho tib si sab hauv tsev thiab sab nraum zoov. Txoj kev nplaum ib txwm muaj ntawm cov vuas yog txoj kev tsim kho tuab txheej, uas yog, ua ntej thov cov mortar ib txwm rau sab nraub qaum ntawm cov vuas, thiab tom qab ntawd nias cov vuas rau txheej hauv paus. Lub thickness ntawm cov txheej mortar yog li 10 txog 30 hli. Txawm hais tias txoj kev no zoo heev rau kev tsim kho ntawm cov hauv paus tsis sib xws, qhov tsis zoo yog qhov ua tau zoo tsawg ntawm cov vuas tiling, qhov yuav tsum tau ua siab rau cov neeg ua haujlwm kev txawj ntse, kev pheej hmoo ntawm kev poob tawm vim tsis yooj ywm ntawm cov mortar, thiab nyuaj rau kev kho cov mortar ntawm qhov chaw tsim kho. Kev zoo raug tswj hwm nruj me ntsis. Txoj kev no tsuas yog haum rau cov vuas uas muaj tus nqi nqus dej siab. Ua ntej nplaum cov vuas, cov vuas yuav tsum tau ntub dej kom ua tiav lub zog sib txuas txaus.
Tam sim no, txoj kev siv cov vuas vov tsev uas siv dav hauv Tebchaws Europe yog txoj kev nplaum cov vuas vov tsev nyias nyias, uas yog, cov nplaum uas hloov kho los ntawm polymer raug khawb rau ntawm qhov chaw ntawm cov txheej hauv paus kom ua ntej siv cov spatula hniav kom ua cov kab txaij. Thiab cov txheej mortar ntawm qhov tuab sib npaug, tom qab ntawd nias cov vuas vov tsev rau nws thiab ntswj me ntsis, qhov tuab ntawm cov txheej mortar yog li 2 txog 4 hli. Vim yog kev hloov kho ntawm cellulose ether thiab redispersible latex hmoov, kev siv cov nplaum vuas vov tsev no muaj kev ua tau zoo rau ntau hom txheej hauv paus thiab cov txheej saum npoo suav nrog cov vuas vov tsev puv nrog kev nqus dej tsawg heev, thiab muaj kev ywj pheej zoo, kom nqus tau qhov kev ntxhov siab los ntawm cov yam xws li qhov sib txawv ntawm qhov kub thiab txias, thiab tiv taus sag zoo heev, lub sijhawm qhib ntev txaus rau kev tsim cov txheej nyias nyias, uas tuaj yeem ua kom ceev nrooj ntawm kev tsim kho, yooj yim rau kev ua haujlwm thiab tsis tas yuav ua kom cov vuas vov tsev ntub dej ua ntej. Txoj kev tsim kho no yooj yim rau kev ua haujlwm thiab yooj yim rau kev tswj xyuas qhov zoo ntawm kev tsim kho hauv qhov chaw.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-12-2022