Lub luag haujlwm ntawm cov hmoov latex redispersible hauv mortar
Tam sim no, vim tias ntau yam khoom siv hmoov qhuav tshwj xeeb tau txais tos thiab siv dav, cov neeg hauv kev lag luam tau them sai sai rau cov hmoov latex uas tau tawg ua ib qho ntawm cov khoom ntxiv tseem ceeb ntawm cov hmoov qhuav tshwj xeeb, yog li ntau yam cwj pwm tau maj mam tshwm sim. hmoov latex, ntau-polymer latex hmoov, resin latex hmoov, dej-raws li resin latex hmoov thiab lwm yam.
Cov yam ntxwv ntawm lub microscopic thiab macroscopic kev ua tau zoo ntawm cov tshuajhmoov latex uas yaj tau dua tshiabhauv cov mortar tau koom ua ke, thiab qee qhov txiaj ntsig theoretical tau raug tshuaj xyuas. Lub tshuab ua haujlwm ntawm cov hmoov latex rov ua dua Cov hmoov latex rov ua dua yog los npaj cov polymer emulsion rau hauv cov khoom sib xyaw uas tuaj yeem siv rau kev ziab tshuaj tsuag los ntawm kev ntxiv cov khoom sib txawv, thiab tom qab ntawd ntxiv cov tshuaj colloid tiv thaiv thiab cov neeg sawv cev tiv thaiv kev sib sau ua ke kom ua rau cov polymer tsim tom qab ziab tshuaj tsuag. Cov hmoov ntws dawb rov ua dua hauv dej. Cov hmoov latex rov ua dua tau faib rau hauv cov mortar qhuav sib npaug. Tom qab cov mortar raug do nrog dej, cov hmoov polymer rov ua dua rau hauv cov slurry sib xyaw tshiab thiab emulsified dua; vim yog cov dej ntawm cov cement, qhov evaporation ntawm qhov chaw thiab kev nqus ntawm cov txheej hauv paus, cov qhov hws hauv cov mortar yog dawb. Kev siv dej tas li thiab qhov chaw alkaline muaj zog uas muab los ntawm cov cement ua rau cov khoom latex qhuav los tsim cov zaj duab xis tsis yaj hauv dej hauv cov mortar. Cov zaj duab xis tas li no yog tsim los ntawm kev sib xyaw ntawm cov khoom tawg hauv cov emulsion rau hauv lub cev homogeneous. Nws yog qhov muaj cov yeeb yaj kiab latex no faib rau hauv cov polymer hloov kho mortar uas ua rau cov polymer hloov kho mortar kom tau txais cov yam ntxwv uas cov cement mortar khov kho tsis tuaj yeem muaj: vim yog lub tshuab ncab tus kheej ntawm cov yeeb yaj kiab latex, nws tuaj yeem raug khi rau lub hauv paus lossis mortar Ntawm qhov sib txuas ntawm cov polymer hloov kho mortar thiab lub hauv paus, qhov cuam tshuam no tuaj yeem txhim kho kev ua tau zoo ntawm cov mortar thiab cov hauv paus sib txawv, xws li kev nplaum ntawm cov hauv paus tshwj xeeb xws li cov vuas ceramic siab thiab cov laug cam polystyrene; Qhov cuam tshuam no hauv cov mortar tuaj yeem khaws nws tag nrho, hauv lwm lo lus, lub zog sib koom ua ke ntawm cov mortar tau txhim kho, thiab thaum cov hmoov latex rov ua dua tshiab nce ntxiv, lub zog sib txuas ntawm cov mortar thiab cov hauv paus pob zeb tau txhim kho zoo heev; Siab Qhov muaj cov polymer hloov pauv tau yooj yim thiab ywj pheej heev tau txhim kho kev ua tau zoo ntawm kev sib txuas thiab kev ywj pheej ntawm cov mortar, thaum cov elastic modulus ntawm cov mortar nws tus kheej txo qis, qhia tias nws qhov ywj pheej tau txhim kho. Cov yeeb yaj kiab latex pom hauv cov mortar hauv cov polymer hloov kho cement mortar ntawm ntau lub hnub nyoog. Cov zaj duab xis uas tsim los ntawm cov roj hmab latex tau muab faib rau ntau qhov chaw sib txawv hauv cov mortar, suav nrog qhov sib txuas ntawm lub hauv paus-mortar, ntawm cov qhov hws, nyob ib puag ncig phab ntsa qhov hws, ntawm cov khoom siv cement hydration, nyob ib puag ncig cov khoom me me ntawm cov cement, nyob ib puag ncig cov khoom sib sau ua ke, thiab qhov sib txuas ntawm cov khoom sib sau ua ke-mortar. Qee cov yeeb yaj kiab roj hmab uas faib rau hauv cov mortar uas hloov kho los ntawm cov hmoov polymer redispersible ua rau nws muaj peev xwm tau txais cov khoom uas cov cement mortar khov kho tsis tuaj yeem muaj: cov yeeb yaj kiab roj hmab tuaj yeem txuas cov kab nrib pleb ntawm qhov sib txuas ntawm lub hauv paus-mortar thiab tso cai rau cov kab nrib pleb kom kho tau. Txhim kho qhov kev sib khi ntawm cov mortar. Kev txhim kho lub zog sib koom ua ke ntawm cov mortar: Qhov muaj cov polymer domains uas yooj ywm thiab ywj siab heev txhim kho qhov yooj ywm thiab elasticity ntawm cov mortar, muab kev sib koom ua ke thiab kev coj cwj pwm dynamic rau cov pob txha khov kho. Thaum siv zog, kev tsim microcrack raug ncua kom txog thaum muaj kev ntxhov siab ntau dua vim muaj kev ywj pheej thiab elasticity zoo dua. Cov polymer domains interwoven kuj tseem cuam tshuam kev sib koom ua ke ntawm cov microcracks rau hauv cov kab nrib pleb nkag mus. Yog li ntawd, cov hmoov roj hmab redispersible ua rau muaj kev ntxhov siab tsis ua haujlwm thiab kev ntxhov siab tsis ua haujlwm ntawm cov khoom siv. Kev hloov kho ntawm polymer rau cov cement mortar ua rau ob qho tau txais cov txiaj ntsig sib xyaw, yog li cov polymer hloov kho mortar tuaj yeem siv rau ntau lub sijhawm tshwj xeeb. Tsis tas li ntawd xwb, vim muaj qhov zoo ntawm cov tshuaj mortar qhuav hauv kev tswj xyuas zoo, kev ua haujlwm tsim kho, kev khaws cia thiab kev tiv thaiv ib puag ncig, cov hmoov latex uas yaj tau dua tshiab muab cov txheej txheem kev siv tshuab zoo rau kev tsim cov khoom siv mortar qhuav tshwj xeeb.
Raws li txoj kev ua haujlwm ntawm cov hmoov polymer uas rov tawg tau hauv cov mortar, peb tau ua qee qhov kev sim sib piv los xyuas qhov ua tau zoo ntawm lwm cov khoom siv uas tam sim no muaj nyob hauv khw, tseem hu ua hmoov latex, hauv cov mortar. 1. Cov ntaub ntawv raw thiab cov txiaj ntsig ntawm kev sim 1.1 Cov khoom siv cement: Conch Hom 42.5 Ordinary Portland Cement Xuab Zeb: River Sand, Silicon Content 86%, Fineness 50-100 Mesh Cellulose Ether: Domestic Viscosity 30000-35000mpas (Brookfield Viscometer, Spindle 6, Speed 20) Hnyav calcium hmoov: hnyav calcium carbonate hmoov, fineness yog 325 mesh Latex hmoov: VAE-raws li redispersible latex hmoov, Tg tus nqi yog -7 ° C, ntawm no yog hu ua: redispersible latex hmoov Ntoo fiber: ZZC500 ntawm JS lub tuam txhab Muaj cov hmoov latex: ib qho muaj cov hmoov latex hmoov, hu ua ntawm no: muaj cov hmoov latex hmoov 97. Cov mis kuaj tshuab yog: Cov xwm txheej kuaj hauv chav kuaj: kub (23 ± 2) ° C, qhov av noo (50 ± 5)%, sim Lub zog cua ncig hauv thaj chaw tsawg dua 0.2m / s. Cov ntawv polystyrene uas tau nthuav dav, qhov ceev ntawm cov khoom yog 18kg / m3, txiav ua 400 × 400 × 5mm. 2. Cov txiaj ntsig ntawm kev sim: 2.1 Lub zog tensile nyob rau hauv lub sijhawm kho sib txawv: Cov qauv tau ua raws li txoj kev sim ntawm lub zog tensile ntawm cov khoom siv hauv JG149-2003. Lub kaw lus kho ntawm no yog: tom qab cov qauv tau tsim, nws tau kho rau ib hnub nyob rau hauv cov xwm txheej txheem ntawm chav kuaj, thiab tom qab ntawd muab tso rau hauv qhov cub 50-degree. Lub lim tiam thawj zaug ntawm kev sim yog: muab tso rau hauv qhov cub 50-degree txog rau hnub rau, coj nws tawm, lo lub taub hau sim rub tawm, Nyob rau hnub 7, ib pawg ntawm lub zog rub tawm tau sim. Kev sim hauv lub lim tiam thib ob yog: muab tso rau hauv qhov cub 50-degree txog rau hnub 13, coj nws tawm, lo lub taub hau sim rub tawm, thiab sim ib pawg ntawm lub zog rub tawm rau hnub 14. Lub lim tiam thib peb, lub lim tiam thib plaub. . . thiab lwm yam.
Los ntawm cov txiaj ntsig, peb tuaj yeem pom tias lub zog ntawmhmoov latex uas yaj tau dua tshiabHauv cov mortar nce thiab tswj hwm raws li lub sijhawm nyob rau hauv qhov chaw kub siab nce, uas yog tib yam li cov zaj duab xis latex uas cov hmoov latex redispersible yuav tsim nyob rau hauv cov mortar. Lub tswv yim yog sib xws, lub sijhawm khaws cia ntev dua, cov zaj duab xis latex ntawm cov hmoov latex yuav ncav cuag qee qhov ceev, yog li ua kom ntseeg tau tias qhov lo rau ntawm cov mortar rau qhov chaw tshwj xeeb ntawm EPS board. Ntawm qhov tsis sib xws, cov hmoov latex 97 muaj nyob hauv khw muaj zog qis dua vim nws khaws cia rau hauv qhov chaw kub siab rau lub sijhawm ntev dua. Lub zog rhuav tshem ntawm cov hmoov latex dispersible rau EPS board tseem zoo li qub, tab sis lub zog rhuav tshem ntawm cov hmoov latex 97 muaj nyob hauv khw muaj zog zuj zus tuaj.
Feem ntau hais lus, hmoov latex uas muaj nyob hauv khw thiab hmoov latex uas yaj tau dua tshiab muaj cov txheej txheem ua haujlwm sib txawv, thiab hmoov latex uas yaj tau dua tshiab, uas tsim ib daim zaj duab xis hauv ntau qhov ntawm cov mortar, ua haujlwm ua cov khoom siv gelling thib ob los txhim kho cov khoom siv lub cev ntawm cov mortar. Cov txheej txheem ua haujlwm ntawm kev ua haujlwm tsis sib xws.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024