Mortar weathering:
txhais:
Efflorescence yog cov dawb, powdery deposits uas tej zaum tshwm nyob rau saum npoo ntawm masonry, pob zeb los yog mortar. Qhov no tshwm sim thaum cov dej-soluble ntsev dissolves nyob rau hauv dej nyob rau hauv cov khoom thiab migrates mus rau saum npoo, qhov twg cov dej evaporates, tawm hauv qab ntsev.
vim li cas:
Dej nkag mus: Dej nkag mus rau hauv masonry lossis mortar tuaj yeem yaj cov ntsev tam sim no hauv cov khoom.
Capillary action: Kev txav ntawm cov dej los ntawm cov hlab ntsha hauv cov masonry lossis mortar tuaj yeem nqa ntsev rau saum npoo.
Kub hloov pauv: Kub hloov pauv ua rau cov dej hauv cov khoom nthuav dav thiab cog lus, txhawb kev txav ntawm cov ntsev.
Kev sib xyaw tsis zoo: Kev sib xyaw ua ke tsis raug lossis siv cov dej tsis huv tuaj yeem ua rau cov ntsev ntxiv.
Kev tiv thaiv thiab kev kho mob:
Kev tsim kho kom zoo: Ua kom cov dej ntws zoo thiab siv cov txheej txheem tsim kom zoo los tiv thaiv cov dej nkag.
Kev siv cov tshuaj ntxiv: Qee cov tshuaj ntxiv tuaj yeem suav nrog hauv cov tshuaj khib nyiab kom txo qis efflorescence.
Curing: Tsim nyog curing ntawm mortar txo qhov muaj peev xwm ntawm efflorescence.
Hydroxypropyl methylcellulose (HPMC):
txhais:
Hydroxypropylmethylcellulose (HPMC) yog ib qho hluavtaws polymer muab los ntawm cellulose. Nws yog feem ntau siv nyob rau hauv kev tsim kho kev lag luam raws li ib tug thickener, dej tuav tus neeg saib xyuas thiab nplaum nyob rau hauv mortars thiab lwm yam khoom siv tsev.
Muaj nuj nqi:
Kev tuav dej: HPMC pab khaws cov dej noo hauv cov mortar, tiv thaiv nws kom qhuav sai heev.
Txhim kho kev ua haujlwm: Nws txhim kho kev ua haujlwm tau zoo thiab sib xws ntawm cov mortar, ua kom yooj yim rau kev tuav thiab tsim kho.
Adhesion: HPMC pab txhim kho adhesion ntawm mortar thiab substrate.
Kev tswj xyuas qhov sib xws: Nws pab tswj kom muaj qhov zoo ib yam ntawm cov mortar, tshwj xeeb tshaj yog nyob rau hauv ntau yam ib puag ncig.
Muaj peev xwm tiv tauj:
Thaum HPMC nws tus kheej tsis ncaj qha ua rau efflorescence, nws siv hauv mortars tuaj yeem cuam tshuam ncaj qha rau efflorescence. Piv txwv li, kev txhim kho dej tuav cov khoom ntawm HPMC tuaj yeem cuam tshuam cov txheej txheem kho, uas tuaj yeem txo qhov kev pheej hmoo ntawm efflorescence los ntawm kev ua kom muaj kev tswj xyuas ntau dua thiab ua kom qhuav ntawm mortar.
nyob rau hauv xaus:
Hauv cov ntsiab lus, tsis muaj kev sib raug zoo ncaj qha ntawm mortar weathering thiab hydroxypropyl methylcellulose. Txawm li cas los xij, kev siv cov tshuaj ntxiv xws li HPMC hauv mortars tuaj yeem cuam tshuam rau yam xws li dej tuav thiab kho, uas tuaj yeem cuam tshuam ncaj qha rau lub peev xwm rau efflorescence. Ntau yam, suav nrog kev tsim kho, kev sib xyaw sib xyaw thiab ib puag ncig ib puag ncig, yuav tsum tau txiav txim siab los tiv thaiv thiab tswj cov efflorescence hauv kev siv masonry thiab mortar.
Lub sij hawm xa tuaj: Dec-11-2023