Raws li cov lus hais mus, "tus kws tshaj lij saib lub qhov rooj, tus neeg ua haujlwm saib cov neeg coob coob", lub zog thaum ntxov ntawm cov cement loj hlob sai, tom qab lub zog loj hlob qeeb, yog tias qhov kub thiab av noo tsim nyog, nws lub zog tseem tuaj yeem loj hlob maj mam. ob peb xyoos lossis kaum xyoo. Cia peb tham txog kev siv calcium formatelos daws qhov teeb meem ntawm cement teeb thiab hardening.
Kev teeb tsa lub sijhawm yog ib qho tseem ceeb ntawm kev ua tau zoo ntawm cov cement
(1) Lub hydration ntawm cement yog nqa tawm maj mam los ntawm qhov chaw mus rau sab hauv. Nrog rau qhov txuas ntxiv ntawm lub sijhawm, cov hydration degree ntawm cov cement yog nce, thiab cov khoom hydration kuj nce ntxiv thiab sau cov pores capillary, uas txo cov porosity ntawm capillary pores thiab sib txuas ua kom cov porosity ntawm gel pores.
Calcium formate tuaj yeem ua kom cov concentration ntawm Ca 2+ nyob rau hauv cov kua theem, ua kom lub cev qhuav dej ntawm calcium silicate, thiab cov nyhuv co-ionic yuav ua rau kom cov crystallization, nce qhov feem ntawm cov khoom theem hauv cov mortar, uas yog qhov zoo rau kev tsim cov cement. pob zeb qauv.
Dispersion thiab viscosity ntawmcalcium formate nyob rau hauv mortar tau kawm los ntawm kev tshuaj xyuas nws cov tsos, fineness, formate cov ntsiab lus thiab solubility nyob rau hauv dej txias. Cov khoom ntawm calcium formate cov khoom thiab cov nyiaj cog lus muaj zog hauv plastering mortar tau sim thiab muab piv.
kub
(2) Qhov kub thiab txias muaj qhov cuam tshuam loj rau kev teeb tsa thiab hardening ntawm cov cement. Thaum qhov kub thiab txias, cov tshuaj tiv thaiv hydration yog nrawm, thiab cov cement lub zog nce sai dua. Thaum qhov kub thiab txias, hydration qeeb thiab lub zog nce qeeb. Thaum kub qis dua 5℃, lub hydration hardening yog heev qeeb. Thaum qhov kub thiab txias qis dua 0℃, cov tshuaj tiv thaiv hydration yeej nres. Nyob rau tib lub sijhawm, vim qhov kub thiab txias hauv qab 0° C, thaum dej khov, nws yuav rhuav tshem cov cement pob zeb.
Ntawm qhov kub thiab txias, cov nyhuv ntawmcalcium formateyog tseem hais ntxiv.Calcium formateyog ib tug tshiab tsis tshua muaj kub thiab thaum ntxov lub zog coagulant tsim nyob rau hauv Tuam Tshoj, thiab lub cev muaj zog zog ntawm calcium formateyog qhov ruaj khov ntawm chav tsev kub, tsis yooj yim rau agglomerate, tsim nyog rau daim ntawv thov hauv mortar.
av noo
(3) Lub pob zeb cement nyob rau hauv qhov chaw ntub dej tuaj yeem khaws cov dej txaus rau hydration thiab condensation thiab hardening, thiab generated hydration yuav ntxiv cov pores thiab txhawb lub zog ntawm cov cement pob zeb. Kev ntsuas ntsuas kub thiab av noo ntawm ib puag ncig, kom lub zog ntawm cov cement pob zeb txuas ntxiv mus, yog hu ua kev saib xyuas. Thaum txiav txim siab lub zog ntawm cov cement, nws yuav tsum tau kho kom haum rau lub hnub nyoog teev nyob rau hauv qhov ntsuas kub thiab av noo ib puag ncig.
Calcium formateTus neeg saib xyuas lub zog thaum ntxov yog tus neeg sawv cev thaum ntxov muaj zog nrog ntau daim ntawv thov thiab cov txiaj ntsig zoo. Ntau cov kev tshawb fawb kev sim tau ua pov thawj tias kev siv calcium formate thaum ntxov lub zog tus neeg sawv cev muaj qhov cuam tshuam loj rau kev ua kom lub sij hawm luv luv thiab txhim kho lub zog thaum ntxov ntawm cov pob zeb, thiab tseem tuaj yeem tiv thaiv kev puas tsuaj ntawm cov pob zeb hauv qab qhov kub thiab txias.
Post lub sij hawm: Jun-04-2024