Raws li qhov sib txawv piv, kev siv ntawmredispersible polymer hmoovhloov kho covqhuav mix mortartuaj yeem txhim kho lub zog ntawm daim ntawv cog lus nrog ntau lub substrates, thiab txhim kho qhov yooj thiab deformability ntawm mortar, dabtsi yog khoov lub zog, hnav tsis kam, toughness, sib txuas quab yuam thiab ntom, dej tuav peev xwm thiab ua haujlwm.
Ib tug loj tus naj npawb ntawm cov kev ntsuam xyuas qhia tau hais tias tus nqi ntawmRDhmoovtsis yog qhov zoo dua. Thaum cov ntsiab lus ntawm RD hmoov tsawg dhau lawm, nws tsuas yog ua si qee cov nyhuv plasticizing, tab sis cov nyhuv txhim kho tsis pom tseeb. Thaum tus nqi ntawmRD hmoovloj heev, lub zog yuav txo. Tsuas yog thaum cov ntsiab lus ntawm RD hmoov yog nruab nrab, nws tsis tsuas yog ua kom lub zog deformation, txhim kho lub zog tensile thiab daim ntawv cog lus lub zog, tab sis kuj txhim kho permeability thiab tawg tsis kam. Qhov sib piv ntawm cov txiv qaub thiab xuab zeb, qhov sib piv ntawm cov dej thiab cov cement, qhov gradation thiab hom aggregate, thiab cov yam ntxwv ntawm kev sib sau yuav kawg cuam tshuam rau kev ua tau zoo ntawm cov khoom.
Tus cawv ntawmredispersiblelatexhmoovntawm lub zog ntawm mortar yog tias lub zog tensile thiab flexural lub zog ntawm mortar tuaj yeem nce ntxiv tom qab sib ntxiv.redispersiblepolymerhmoov,tab sis lub zog compressive tsis tau ua kom zoo dua lossis txawm txo qis. Vim lub toughening nyhuv ntawmredispersiblepolymerhmoov, lub zog tensile sab hauv thiab interfacial bonding tensile lub zog ntawm mortar yog txhim kho, thiab lub zog tensile lub zog ntawm mortar thiab substrate yog zoo heev.
Kev tawg ntawm cov ntaub ntawv nkig feem ntau yog tshwm sim los ntawm tensile tsis ua hauj lwm, thaum lub tensile kev nyuaj siab tshaj nws tus kheej tensile zog tus nqi, cracking yuav tshwm sim. Yog li ntawd, muaj tus nqi siab tensile lub zog yog qhov tsim nyog rau kev tiv thaiv kev tawg.
Cov txiaj ntsig tau pom tias lub zog tensile ntawm polymer-hloov cement mortar feem ntau nce ua ntej thiab tom qab ntawd txo qis nrog qhov nce ntawm cov cement-cement piv, uas qhia tau tias muaj kev sib xyaw zoo. Qhov laj thawj ntawm kev poob qis feem ntau yog vim qhov sib ntxiv ntawm ntau dhauredispersible emulsion hmoovua rau kev taw qhia ntawm cov npuas ntau dhau, ua rau muaj kev poob qis hauv compressive zog. Yog li ntawd, lub zog compressive yuav tsum tau txhim kho los ntawm kev kho qhov sib piv ntawm txiv qaub rau xuab zeb, dej rau cement, aggregate gradation thiab aggregate hom. Kev txhim kho ntawm tensile lub zog, flexural zog, yooj, tawg tsis kam thiab hydrophobicity tuaj yeem ua tiav los ntawm kev ntxivredispersiblelatexhmoov, tab sis qhov ntau ntxiv, qhov zoo dua. Thaum cov ntsiab lus ntawm cov hmoov roj hmab tsawg dhau lawm, nws tsuas yog ua si qee cov nyhuv plasticizing, tab sis cov nyhuv txhim kho tsis pom tseeb. Thaum cov hmoov redispersible ntau dhau lawm, lub zog yuav txo. Tsuas yog thaum cov ntsiab lus ntawmredispersiblehmoovyog nruab nrab, nws tsis tsuas yog nce lub deformation kuj, tensile zog thiab daim ntawv cog lus lub zog, tab sis kuj txhim kho cov permeability thiab tawg kuj. Qhov sib piv ntawm cov txiv qaub thiab xuab zeb, qhov sib piv ntawm cov dej thiab cov cement, qhov gradation thiab hom aggregate, thiab cov yam ntxwv ntawm kev sib sau yuav kawg cuam tshuam rau kev ua tau zoo ntawm cov khoom.
Post lub sij hawm: Feb-26-2024