Cov teeb meem tshwm sim hauv cov hmoov putty

Ib qho teeb meem tshwm sim hauv cov hmoov putty yog tias lawv qhuav sai. Qhov no feem ntau yog vim muaj cov calcium tshauv hmoov ntxiv (loj heev, cov calcium calcium hmoov uas siv hauv cov mis putty tuaj yeem txo kom tsim nyog, uas cuam tshuam rau cov dej tuav ntawm cov fiber ntau, thiab tseem ua rau lub dryness ntawm cov hmoov nplej. cov phab ntsa; tev thiab dov Qhov no yog hais txog kev tuav dej Lub viscosity ntawm cellulose tsis tshua muaj tshwm sim los yog qhov sib ntxiv yog me me; hmoov (cov hmoov tshauv calcium hmoov nyob rau hauv lub putty mis yog tsawg heev los yog lub purity ntawm cov hmoov tshauv calcium hmoov Yog hais tias nws yog tsawg heev, nws muaj feem xyuam rau qhov tsim nyog tus nqi ntawm cov hmoov tshauv calcium hmoov nyob rau hauv lub putty hmoov mis, thiab nws yog kuj muaj feem xyuam rau tus nqi thiab zoo ntawm cellulose, uas yog reflected nyob rau hauv cov dej tuav tus nqi ntawm cov khoom Cov calcium oxide nyob rau hauv calcium hydroxide tsis tag nrho hloov mus rau calcium hydroxide, uas yog tshwm sim los ntawm lub sij hawm hydration tsis txaus; ua npuas ncauj. Qhov no muaj feem xyuam rau cov av qhuav thiab flatness ntawm phab ntsa, thiab nws kuj muaj feem xyuam rau kev tsim kho; pinpoints tshwm. Qhov no muaj feem xyuam rau Nws muaj feem xyuam rau cellulose, nws cov yeeb yaj kiab tsim cov cuab yeej tsis zoo, thiab cov impurities hauv cellulose react me ntsis nrog tshauv calcium. Yog tias cov tshuaj tiv thaiv hnyav heev, cov hmoov putty yuav nyob rau hauv lub xeev. Nws tsis tuaj yeem muab tso rau ntawm phab ntsa, thiab nws tsis muaj lub zog cohesive. Tsis tas li ntawd, cov fiber ntau qhov teeb meem no kuj tshwm sim nyob rau hauv cov khoom uas tau tov nrog carboxymethyl pawg nyob rau hauv lub caij; volcanoes thiab hluav taws tshwm. Qhov no yog pom tseeb muaj feem xyuam rau cov dej nto nro ntawm hydroxypropyl methylcellulose aqueous kua. Cov dej saum npoo nro ntawm cov tshuaj hydroxyethyl aqueous tsis pom tseeb. Kev kho tiav yuav zoo; lub putty yog yooj yim tawg thiab tig daj tom qab ziab. Qhov no muaj feem xyuam rau qhov sib ntxiv ntawm ntau cov hmoov tshauv calcium hmoov. Yog hais tias cov hmoov tshauv calcium hmoov ntau dhau lawm, lub hardness ntawm putty hmoov yuav nce tom qab ziab. Tsuas yog lub hardness tsis yog nws yooj yim rau tawg thaum nws hloov tau, tshwj xeeb tshaj yog thaum nws raug rau sab nraud quab yuam. Nws kuj tseem muaj feem xyuam rau cov ntsiab lus siab ntawm calcium oxide hauv cov hmoov tshauv calcium hmoov.

Coarse fineness tsis yog tsuas yog khib nyiab, tab sis kuj txo lub zog hauv zos ntawm cov tshuaj khib. Thaum xws li cov hmoov qhuav mortar yog tsim nyob rau hauv ib cheeb tsam loj, kev kho ceev ntawm cov hmoov qhuav hauv zos yuav txo qis, thiab cov kab nrib pleb yuav tshwm sim vim lub sijhawm sib txawv. Rau cov tshuaj txau nrog cov khoom siv kho tshuab, qhov yuav tsum tau ua kom zoo yog siab dua vim lub sijhawm sib xyaw luv. Qhov zoo ntawm cellulose kuj muaj qee yam cuam tshuam rau nws cov dej tuav. Feem ntau hais lus, rau methyl cellulose ethers nrog tib viscosity tab sis sib txawv fineness, nyob rau hauv cov ntaub ntawv ntawm tus nqi ntxiv, qhov finer lub finer qhov zoo dua cov dej tuav nyhuv.