Cov tshuaj mortar siv dav hauv ntau yam kev siv hauv kev lag luam kev tsim kho xws li plastering, flooring, vuas vov thiab masonry, thiab lwm yam. Mortar feem ntau yog sib xyaw ntawm cement, xuab zeb thiab dej sib xyaw ua ke los ua ib qho nplaum. Nyob rau xyoo tas los no, muaj kev thov ntau ntxiv rau cov khoom ntxiv uas txhim kho kev ua tau zoo ntawm cov mortars. Redispersible polymer hmoov (RDP) yog ib qho khoom ntxiv nrov uas ntxiv rau hauv cov mortars tsim kho kom txhim kho lawv cov khoom. Tsab xov xwm no yuav muab ib qho kev piav qhia txog lub luag haujlwm ntawm RDP redispersible polymer hmoov additives hauv cov mortars tsim kho.
Cov hmoov polymer uas tawg tau dua yog cov polymer uas muaj ethylene-vinyl acetate copolymer, acrylic acid thiab vinyl acetate. Cov polymers no sib xyaw nrog lwm cov khoom ntxiv xws li cov khoom sau, cov khoom ua kom tuab thiab cov khoom khi kom tsim tau cov hmoov RDP. Cov hmoov RDP yog siv rau hauv kev tsim ntau yam khoom siv hauv kev tsim kho suav nrog cov nplaum rau pobzeb, cov cement-based mortars thiab cov neeg sawv cev rau kev teeb tsa.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev siv RDP hauv cov tshuaj khib nyiab tsim kho yog tias nws txhim kho qhov ua haujlwm ntawm cov tshuaj khib nyiab. RDP ua rau cov tshuaj khib nyiab sib xws, ua rau nws yooj yim dua rau kev thov thiab nthuav dav. Kev ua haujlwm zoo dua kuj txhais tau tias yuav tsum muaj dej tsawg dua kom ua tiav qhov sib xws xav tau. Qhov no ua rau cov tshuaj khib nyiab tiv taus kev tawg thiab ntsws, ua rau nws ruaj khov dua thiab siv tau ntev dua.
Lwm qhov txiaj ntsig tseem ceeb ntawm kev siv RDP hauv cov tshuaj khib nyiab tsim kho yog tias nws txhim kho qhov kev sib txuas ntawm cov tshuaj khib nyiab. Kev sib txuas zoo dua txhais tau tias cov tshuaj khib nyiab tsim kev sib txuas zoo dua nrog qhov chaw rau kev ua haujlwm zoo dua thiab ruaj khov. RDP kuj tseem txhim kho cov yam ntxwv ntawm cov tshuaj khib nyiab, pab tiv thaiv kev poob dej thaum lub sijhawm tsim kho. Qhov no tso cai rau cov tshuaj khib nyiab kom teeb tsa thiab tawv dua, ua kom ntseeg tau tias muaj kev ua haujlwm zoo thiab ruaj khov.
RDP kuj ua rau cov mortar yooj ywm dua, ua rau nws muaj peev xwm tiv taus kev ntxhov siab thiab kev ntxhov siab mus sij hawm ntev. Qhov yooj ywm ntxiv ntawm cov mortar txhais tau tias nws tsis tshua muaj kev tawg thiab tawg txawm tias raug rau cov xwm txheej ib puag ncig hnyav. Qhov kev ywj pheej zoo dua no kuj txhais tau tias cov mortar muaj ntau yam thiab tuaj yeem siv rau ntau yam kev siv, suav nrog cov nto tsis sib luag thiab nkhaus.
Kev siv RDP hauv cov tshuaj khib nyiab tsim kho kuj ua rau lub zog compressive ntawm cov tshuaj khib nyiab. Lub zog compressive yog ib qho tseem ceeb ntawm cov tshuaj khib nyiab tsim kho vim nws txiav txim siab seb cov tshuaj khib nyiab tiv taus kev hloov pauv thiab tawg zoo li cas thaum muaj kev thauj khoom. RDP ua rau lub zog compressive ntawm cov tshuaj khib nyiab nce ntxiv, ua rau nws muaj peev xwm tiv taus cov khoom hnyav thiab txo qhov yuav muaj kev tawg thiab kev puas tsuaj.
Hauv kev xaus lus, kev siv cov hmoov polymer RDP redispersible hauv cov mortars tsim kho muaj ntau yam zoo uas tuaj yeem txhim kho kev ua tau zoo thiab kev ruaj khov ntawm cov mortar. RDP txhim kho kev ua haujlwm tau zoo, kev nplaum, kev khaws dej, kev ywj pheej thiab lub zog compressive ntawm cov mortar, ua rau nws muaj ntau yam thiab haum rau ntau yam kev siv. Kev siv RDP hauv cov mortars tsim cov khoom lag luam zoo dua, pheej yig dua thiab ruaj khov dua, ua rau nws yog qhov kev xaiv nrov dua rau cov neeg ua vaj tse thiab cov neeg cog lus.
Lub sijhawm tshaj tawm: Lub Rau Hli-29-2023