1. Kev taw qhia thiab kev faib tawm ntawm tus kheej-leveling cement/mortar
Self-leveling cement / mortar yog ib hom uas tuaj yeem muab lub tiaj tiaj thiab du hauv pem teb uas qhov kawg ua tiav (xws li cov ntaub pua plag, ntoo pem teb, thiab lwm yam) tuaj yeem muab tso rau. Nws cov kev ua haujlwm tseem ceeb suav nrog kev ua kom nrawm nrawm thiab qis qis. Muaj cov txheej txheem hauv pem teb sib txawv ntawm kev ua lag luam xws li cement-based, gypsum-based lossis lawv cov khoom sib xyaw. Nyob rau hauv tsab xov xwm no peb yuav tsom mus rau flowable systems nrog leveling zog. Flowable hydraulic av (yog tias nws yog siv los ua txheej txheej kawg, nws yog hu ua cov khoom siv saum npoo; yog tias nws siv los ua cov txheej txheem hloov pauv nruab nrab, nws yog hu ua cov khoom siv cushion) feem ntau hu ua: cement-based self-leveling pem teb (surface txheej) thiab cement-based self-leveling pem teb (cushion txheej).
2. Cov khoom lag luam muaj pes tsawg leeg thiab qhov sib piv
Self-leveling cement / mortar yog hydraulically hardened composite khoom ua los ntawm cov cement ua cov khoom siv hauv paus thiab sib xyaw ua ke nrog lwm cov ntaub ntawv hloov kho. Txawm hais tias muaj ntau yam qauv tam sim no muaj qhov sib txawv thiab txawv, tab sis feem ntau cov ntaub ntawv
Inseparable los ntawm hom teev hauv qab no, lub hauv paus ntsiab lus yog roughly tib yam. Nws yog tsim los ntawm 6 qhov hauv qab no: (1) cov khoom sib xyaw cementitious, (2) ntxhia muab tub lim, (3) coagulation regulator, (4) rheology modifier, (5) reinforcing tivthaiv, (6) dej muaj pes tsawg leeg, hauv qab no yog cov piv txwv ntawm ib co manufacturers.
(1) Mixed cementitious khoom system
30-40%
High alumina cement
Ordinary Portland Cement
a- hemihydrate gypsum / anhydrite
(2) Mineral muab tub lim
55-68%
Quartz xuab zeb
calcium carbonate hmoov
(3) Coagulant regulator
~ 0.5%
Teem retarder - tartaric acid
Coagulant - Lithium Carbonate
(4) Rheology hloov kho
~ 0.5%
Superplasticizer-Dej Reducer
Defoamer
stabilizer
(5) Txhim kho cov khoom siv
1-4%
redispersible polymer hmoov
(6) 20% -25%
dej
3. Kev tsim thiab kev ua haujlwm ntawm cov ntaub ntawv
Self-leveling cement / mortar yog qhov nyuaj tshaj plaws cement mortar formulation. Feem ntau yog tsim los ntawm ntau tshaj 10 yam, cov hauv qab no yog cov qauv ntawm cov cement-based self-leveling pem teb (cushion)
Cement-based self-leveling pem teb (cushion)
Raw Khoom: OPC zoo tib yam silicate cement 42.5R
Dosage Scale: 28
Raw Khoom: HAC625 High Alumina Cement CA-50
Dosage Scale: 10
Raw Khoom: Quartz Sand (70-140mesh)
Kev faib ua feem: 41.11
Raw Khoom: Calcium Carbonate (500mesh)
Dosage Scale: 16.2
Raw Khoom: Hemihydrate Gypsum semi-hydrated gypsum
Dosage Scale: 1
Raw Khoom Raw Khoom: Anhydrite anhydrite (anhydrite)
Dosage Scale: 6
Raw Khoom: Latex Powder AXILATTM HP8029
Dosage Scale: 1.5
Raw Khoom:Cellulose EtherHPMC400
Dosage Scale: 0.06
Raw Khoom: Superplasticizer SMF10
Dosage Scale: 0.6
Raw Khoom: Defoamer defoamer AXILATTM DF 770 DD
Dosage Scale: 0.2
Raw Khoom: Tartaric Acid 200 mesh
Dosage Scale: 0.18
Raw Khoom: Lithium Carbonate 800 mesh
Dosage Scale: 0.15
Raw Khoom: Calcium Hydrate Slaked Lime
Dosage Scale: 1
Raw Khoom: Tag nrho
Dosage Scale: 100
Nco tseg: Kev tsim kho siab tshaj 5 ° C.
(1) Nws cov khoom siv cementitious feem ntau yog tsim los ntawm Portland cement (OPC), siab alumina cement (CAC) thiab calcium sulfate, thiaj li muab calcium txaus, txhuas thiab sulfur los tsim calcium vanadium pob zeb. Qhov no yog vim qhov tsim ntawm calcium vanadium pob zeb muaj peb yam tseem ceeb, uas yog (1) ceev tsim ceev, (2) siab dej binding peev, thiab (3) muaj peev xwm ntxiv shrinkage, uas yog tag nrho nyob rau hauv txoj kab nrog macroscopic zog uas nws tus kheej. -leveling cement/mortar yuav tsum muab Require.
(2) Kev muab qhab nia ntawm tus kheej-leveling cement / mortar hais yuav tsum tau siv cov coarser fillers (xws li quartz xuab zeb) thiab finer fillers (xws li finely av calcium carbonate hmoov) ua ke kom ua tiav qhov zoo tshaj plaws compactness nyhuv.
(3) Cov calcium sulfate uas tsim nyob rau hauv tus kheej-leveling cement/mortar yog -hemihydrate gypsum (-CaSO4•½H2O) los yog anhydrite (CaSO4); Lawv tuaj yeem tso tawm sulfate radicals ntawm tus nqi nrawm txaus yam tsis tas siv dej ntau ntxiv. Ib lo lus nug uas feem ntau nug yog vim li cas -hemihydrate gypsum (uas muaj tib yam tshuaj muaj pes tsawg leeg xws li -hemihydrate), uas yog yooj yim dua thiab tsis tshua kim tshaj -hemihydrate, siv tsis tau. Tab sis qhov teeb meem yog tias qhov tsis muaj qhov sib piv siab ntawm -hemihydrate gypsum yuav ua rau kom cov dej haus tau zoo, uas yuav ua rau txo qis zog ntawm cov tshuaj khib nyiab.
(4) Redispersible roj hmab hmoov yog qhov tseem ceeb ntawm tus kheej-leveling cement / mortar. Nws tuaj yeem txhim kho fluidity, nto abrasion tsis kam, rub tawm lub zog thiab flexural zog. Tsis tas li ntawd, nws txo cov modulus ntawm elasticity, yog li txo qhov kev ntxhov siab hauv lub cev. Redispersible roj hmab hmoov yuav tsum muaj peev xwm tsim muaj zog polymer films. High-performance self-leveling cement / mortar khoom muaj txog li 8% redispersible roj hmab hmoov, thiab mas yog high-alumina cement. Cov khoom no tau lees tias qhov chaw ua kom tawv nqaij sai thiab muaj zog thaum ntxov tom qab 24 teev, yog li ua tau raws li qhov yuav tsum tau ua rau kev tsim kho hnub tom ntej, xws li kev kho dua tshiab.
(5) Self-leveling cement / mortar yuav tsum tau teeb tsa accelerators (xws li lithium carbonate) kom ua tiav cov cement thaum ntxov lub zog, thiab cov retarders (xws li tartaric acid) kom qeeb qhov chaw ceev ntawm gypsum.
(6) Superplasticizer (polycarboxylate superplasticizer) ua raws li cov dej reducer hauv tus kheej-leveling cement / mortar thiab yog li muab kev khiav thiab qib kev ua haujlwm.
(7) Lub defoamer tuaj yeem tsis tsuas yog txo cov ntsiab lus ntawm huab cua thiab txhim kho qhov kawg ntawm lub zog, tab sis kuj tau txais ib qho zoo, du thiab ruaj khov.
(8) Ib qho me me ntawm stabilizer (xws li cellulose ether) tuaj yeem tiv thaiv kev sib cais ntawm cov mortar thiab tsim ntawm daim tawv nqaij, yog li ua rau muaj kev cuam tshuam tsis zoo rau qhov kawg ntawm cov khoom. Redispersible roj hmab hmoov ntxiv txhim kho cov khoom ntws thiab ua kom muaj zog.
4. Cov khoom yuav tsum tau ua zoo thiab cov thev naus laus zis tseem ceeb
4.1. Cov kev cai yooj yim rau tus kheej-leveling cement / mortar
(1) Nws muaj fluidity zoo, thiab muaj cov cuab yeej zoo nyob rau hauv rooj plaub ntawm ob peb millimeters tuab, thiab
Lub slurry muaj kev ruaj ntseg zoo, yog li nws tuaj yeem txo qis qhov tshwm sim tsis zoo xws li kev sib cais, delamination, los ntshav, thiab bubbling.
Thiab nws yog ib qho tsim nyog los xyuas kom meej lub sijhawm siv tau txaus, feem ntau ntau dua 40 feeb, txhawm rau pab txhawb kev tsim kho.
(2) Lub tiaj tiaj zoo dua, thiab qhov saum npoo tsis muaj qhov tsis xws luag.
(3) Raws li cov khoom siv hauv av, nws lub zog compressive, hnav tsis kam, cuam tshuam tsis kam, dej tsis kam thiab lwm yam kev siv lub cev
Qhov kev ua tau zoo yuav tsum ua kom tau raws li qhov yuav tsum tau ua ntawm kev tsim vaj tsev sab hauv.
(4) Durability yog zoo dua.
(5) Kev tsim kho yog yooj yim, ceev ceev, txuag sij hawm thiab txuag zog.
4.2. Cov khoom tseem ceeb ntawm tus kheej-leveling cement / mortar
(1) Mobility
Fluidity yog ib qho tseem ceeb qhia txog kev ua haujlwm ntawm tus kheej-leveling cement / mortar. Feem ntau, qhov fluidity ntau dua 210-260mm.
(2) Slurry stability
Qhov ntsuas no yog qhov ntsuas qhov ntsuas qhov ruaj khov ntawm tus kheej-leveling cement / mortar. Ncuav cov slurry sib xyaw rau ntawm lub khob iav tso rau hauv kab rov tav, saib tom qab 20 feeb, yuav tsum tsis muaj qhov pom tseeb los ntshav, delamination, cais, bubbling thiab lwm yam tshwm sim. Qhov ntsuas no muaj kev cuam tshuam zoo rau qhov chaw saum npoo thiab durability ntawm cov khoom tom qab molding.
(3) Compressive zog
Raws li cov khoom siv hauv av, qhov taw qhia no yuav tsum ua raws li kev tsim kho tshwj xeeb rau cov cement flooring, domestic zoo tib yam cement mortar nto
Lub zog compressive ntawm thawj pem teb yuav tsum siab tshaj 15MPa, thiab lub zog compressive ntawm cov cement pob zeb saum npoo yog siab dua 20MPa.
(4) Flexural zog
Lub zog flexural ntawm kev lag luam tus kheej-leveling cement / mortar yuav tsum siab dua 6Mpa.
(5) Lub sijhawm coagulation
Rau lub sijhawm teeb tsa ntawm tus kheej-leveling cement / mortar, tom qab paub meej tias cov slurry yog sib npaug, xyuas kom meej tias nws lub sijhawm siv ntau tshaj 40 feeb, thiab kev ua haujlwm yuav tsis cuam tshuam.
(6) Kev cuam tshuam tsis kam
Self-leveling cement / mortar yuav tsum muaj peev xwm tiv taus qhov cuam tshuam ntawm tib neeg lub cev thiab cov khoom thauj hauv ib txwm muaj kev khiav tsheb, thiab qhov cuam tshuam rau hauv av yog ntau dua lossis sib npaug li 4 joules.
(7) Hnav tsis kam
Self-leveling cement / mortar raws li cov khoom siv hauv av yuav tsum tiv taus cov tsheb hauv av. Vim nws cov txheej txheej nyias nyias, thaum lub hauv paus hauv av yog cov khoom, nws cov kabmob quab yuam feem ntau yog nyob rau saum npoo, tsis yog ntawm qhov ntim. Yog li ntawd, nws hnav tsis kam yog qhov tseem ceeb tshaj li compressive zog.
(8) Bond tensile zog rau lub hauv paus txheej
Lub zog sib txuas ntawm tus kheej-leveling cement / mortar thiab lub hauv paus txheej yog ncaj qha ntsig txog seb puas yuav muaj hollowing thiab ntog tawm tom qab slurry yog hardened, uas muaj kev cuam tshuam ntau dua rau cov khoom siv. Nyob rau hauv txoj kev tsim kho tiag tiag, txhuam tus neeg sawv cev hauv av kom ncav cuag qhov xwm txheej uas tsim nyog rau kev tsim cov khoom siv tus kheej. Lub zog tensile lub zog ntawm cov cement pem teb tus kheej-leveling cov ntaub ntawv feem ntau yog siab tshaj 0.8MPa.
(9) Kev tiv thaiv tawg
Crack resistance yog ib qho tseem ceeb qhia ntawm tus kheej-leveling cement / mortar, thiab nws qhov loj me yog cuam tshuam txog seb puas muaj cov kab nrib pleb, hollowing, thiab ntog tawm tom qab cov khoom nws tus kheej-leveling hardens. Txawm hais tias koj tuaj yeem ntsuas qhov kev sib tsoo ntawm tus kheej cov ntaub ntawv qib siab yog cuam tshuam txog seb koj puas tuaj yeem ntsuas qhov ua tiav lossis tsis ua tiav ntawm cov khoom siv tus kheej qib.
5. Kev tsim kho tus kheej-leveling cement/mortar
(1) Kev kho mob yooj yim
Ntxuav lub hauv paus txheej kom tshem tawm cov plua plav ntab, roj stains thiab lwm yam khoom siv tsis zoo. Yog hais tias muaj cov potholes loj nyob rau hauv lub hauv paus txheej, filling thiab leveling kev kho mob yuav tsum tau.
(2) Kev kho deg
Siv 2 lub tsho tiv no ntawm tus neeg sawv cev hauv av ntawm lub hauv paus ntxuav.
(3) Leveling kev tsim kho
Xam cov khoom siv ntau yam raws li cov khoom siv, dej-khoom sib piv (los yog kua-khoom piv) thiab thaj chaw tsim kho, do tusyees nrog ib tug tov khoom, ncuav lub stirred slurry rau hauv av, thiab maj mam txhuam cov stubble.
(4) Kev txuag
Nws tuaj yeem tswj tau raws li qhov xav tau ntawm ntau yam khoom siv tus kheej-leveling.
Post lub sij hawm: Dec-06-2022