Qhuav hmoov mortar yog hais txog cov khoom siv granular lossis hmoov tsim los ntawm lub cev sib xyaw ntawm cov khoom sib xyaw ua ke, cov khoom siv tsis muaj zog cementitious, thiab cov khoom ntxiv uas tau qhuav thiab tshuaj xyuas hauv ib qho kev faib ua feem.Dab tsi yog cov khoom siv feem ntau siv rau cov hmoov qhuav mortar?Qhuav hmoov mortar feem ntau siv Portland cement raws li cov khoom siv cementitious, thiab cov khoom siv cementitious feem ntau suav rau 20% mus rau 40% ntawm cov hmoov qhuav mortar;Feem ntau cov zoo aggregates yog quartz xuab zeb thiab yuav tsum muaj ntau yam kev kho mob ua ntej xws li ziab thiab tshuaj xyuas kom ntseeg tau tias lawv cov particle loj thiab zoo raws li qhov yuav tsum tau ua ntawm cov mis;Qee lub sij hawm ya tshauv, slag hmoov, thiab lwm yam kuj ntxiv raws li admixtures;Admixtures feem ntau yog siv me me, txij li 1% mus rau 3%, tab sis muaj qhov cuam tshuam loj.Lawv feem ntau raug xaiv raws li qhov yuav tsum tau ua ntawm cov khoom tsim los txhim kho kev ua haujlwm, txheej txheej, lub zog, shrinkage, thiab Frost tsis kam ntawm mortar.
Dab tsi yog hom hmoov qhuav mortar additives?
Redispersible latex hmoov
Redispersible latex hmoov tuaj yeem txhim kho cov khoom hauv qab no hauv cov hmoov qhuav mortar:
① Kev tuav dej thiab ua haujlwm ntawm cov tshuaj khib nyiab tshiab;
② Kev sib txuas ua haujlwm ntawm cov txheej txheem sib txawv;
③ Kev ua tau zoo thiab deformation ntawm mortar;
④ Khoov lub zog thiab cohesion;
⑤ Hnav tsis kam;
⑥ Kev ua siab ntev;
⑦ Compactness (impermeability).
Daim ntawv thov ntawmredispersible latex hmoovnyob rau hauv nyias txheej plastering mortar, ceramic pobzeb binder, sab nrauv phab ntsa rwb thaiv tsev, thiab nws tus kheej leveling flooring cov ntaub ntawv tau qhia tau zoo.
Water retaining thiab thickening tus neeg sawv cev
Cov dej tuav cov thickeners feem ntau suav nrogcellulose ethers, starch ethers, thiab lwm yam. Cov cellulose ether siv nyob rau hauv qhuav hmoov mortar yog mas methyl hydroxyethyl cellulose ether (MHEC) thiab hydroxypropyl methyl cellulose ether (HPMC).
Dej txo tus neeg sawv cev
Lub luag haujlwm tseem ceeb ntawm cov dej txo cov neeg ua haujlwm yog txhawm rau txo cov dej thov ntawm mortar, yog li txhim kho nws lub zog compressive.Cov dej tseem ceeb txo cov neeg ua haujlwm siv hauv cov hmoov qhuav mortar suav nrog casein, naphthalene raws li dej txo tus neeg saib xyuas, melamine formaldehyde condensate, thiab polycarboxylic acid.Casein yog ib qho zoo heev superplasticizer, tshwj xeeb tshaj yog rau nyias txheej mortar, tab sis vim nws cov xwm txheej, nws qhov zoo thiab tus nqi feem ntau hloov pauv.Naphthalene series dej txo cov neeg ua haujlwm feem ntau siv β- Naphthalenesulfonic acid formaldehyde condensate.
Coagulant
Muaj ob hom coagulants: accelerator thiab retarder.Accelerating agents yog siv los ua kom nrawm qhov chaw thiab hardening ntawm mortar, thiab calcium formate thiab lithium carbonate yog dav siv.Aluminate thiab sodium silicate kuj tseem siv tau los ua cov neeg ua haujlwm nrawm.Lub retarder yog siv los ua kom qeeb ntawm qhov chaw thiab hardening ntawm mortar, thiab tartaric acid, citric acid thiab nws cov ntsev, nrog rau cov gluconate tau zoo siv.
Tus neeg saib xyuas dej tsis zoo
Cov tshuaj tiv thaiv dej feem ntau suav nrog cov khoom siv polymer xws li hlau chloride, organic silane compounds, fatty acid ntsev, polypropylene fibers, thiab styrene butadiene roj hmab.Hlau chloride waterproofing tus neeg saib xyuas muaj zoo waterproofing nyhuv, tab sis nws yog nquag mus corrosion ntawm steel tuav thiab hlau embedded qhov chaw.Cov ntsev tsis muaj calcium uas tsim los ntawm cov tshuaj tiv thaiv ntawm fatty acid ntsev nrog calcium ions nyob rau hauv cov cement theem tso rau ntawm phab ntsa ntawm capillaries, ua lub luag hauj lwm hauv thaiv qhov hws thiab ua rau cov phab ntsa capillary raj ua hydrophobic nto, yog li ua lub luag hauj lwm waterproof.Chav tsev nqi ntawm cov khoom no kuj tsis tshua muaj, tab sis nws yuav siv sij hawm ntev los sib tov cov mortar sib npaug nrog dej.
fiber ntau
Cov fibers siv rau qhuav hmoov mortar muaj xws li alkali resistant iav fiber, polyethylene fiber (polypropylene fiber), high-strength thiab siab modulus polyvinyl cawv fiber (polyvinyl cawv fiber),ntoo fiber, thiab lwm yam. Cov khoom siv feem ntau yog cov muaj zog thiab siab modulus polyvinyl cawv fibers thiab polypropylene fibers.Lub zog siab thiab siab modulus polyvinyl cawv fibers muaj kev ua tau zoo dua thiab tus nqi qis dua li cov khoom siv polypropylene tuaj.Cov fibers tsis tu ncua thiab tsis sib xws hauv cov cement matrix, thiab sib txuas nrog cov cement los tiv thaiv kev tsim thiab kev loj hlob ntawm microcracks, ua rau cov mortar matrix ntom, thiab yog li muaj cov dej tsis zoo thiab muaj kev cuam tshuam zoo heev thiab kev sib tsoo.Qhov ntev yog 3-19 mm.
Defoamer
Tam sim no, cov hmoov defoamers siv nyob rau hauv qhuav hmoov mortar feem ntau yog polyols thiab polysiloxanes.Daim ntawv thov ntawm defoamers tuaj yeem tsis tsuas yog kho cov ntsiab lus npuas, tab sis kuj txo qis shrinkage.Hauv kev siv tswv yim, txhawm rau txhim kho kev ua tau zoo, ntau yam khoom ntxiv yuav tsum tau siv ib txhij.Hauv qhov no, nws yog ib qho tsim nyog yuav tsum tau them sai sai rau kev sib nrig sib cuam tshuam ntawm ntau yam additives.Tsis tas li ntawd, nws tseem yuav tsum tau them sai sai rau tus nqi ntawm cov khoom siv ntxiv.Tsawg dhau los cuam tshuam cov nyhuv ntawm additives;Ntau dhau lawm, tej zaum yuav muaj kev phiv.
Post lub sij hawm: Aug-29-2023