Calcium formateyog cov kua hmoov dawb los yog daj me ntsis, uas tuaj yeem ua kom cov hydration ceev ntawm cov cement thiab zam qhov teeb meem ntawm qhov teeb meem qeeb qeeb hauv lub caij ntuj no los yog qhov kub thiab txias thiab ntub dej, txhawm rau txhim kho lub zog thaum ntxov ntawm mortar. Hnub no kuv yuav qhia koj txogcalcium formate kom ceev qhov chaw thiab hardening ntawm pob zeb yog dab tsi tshwj xeeb?
Calcium formate accelerates qhov chaw thiab hardening ntawm pob zeb los ntawm:
1. Txo lub sij hawm teem caij pib
2. normalize qeeb ntawm cov cement nyob rau hauv qhov kub thiab txias
3. Ua kom muaj kev loj hlob ntawm lub zog thaum ntxov
4. Shorten lub sij hawm kaw nyob rau hauv lub module nyob rau hauv zus tau tej cov pob zeb prefabricated qhov chaw
5. Txo lub sij hawm rau pob zeb kom ncav cuag nws lub peev xwm thauj khoom
Piv txwv li, Portland cement feem ntau yog siv rau hauv mortar qhuav, uas yog cov yam ntxwv ntawm lub zog tsis muaj zog nyob rau hauv thaum ntxov theem thiab siab zog nyob rau hauv lub tom ntej theem, thiab ntxiv ib tug tsim nyog tus nqi ntawm calcium formate yog zoo los txhim kho lub zog thaum ntxov ntawm cov khoom.
Hauv Portland cement system,calcium formate muaj cov nyhuv ntawm kev txhawb nqa coagulation thiab lub zog thaum ntxov, vim hais tias cov formate ions hauv HCOO- tuaj yeem tsim qhov zoo sib xws ntawm AHt thiab AFm (C₃A·3 Ca (HCOO)₂·30 H₂OC₃A·Ca (HCOO)·10 H₂0, thiab lwm yam), uas txo cov sijhawm teem sijhawm ntawm cov cement.
Ntxiv rau,calcium formatetuaj yeem txhawb cov dej ntawm calcium silicate, vim tias HCOO- ions yog diffused sai dua Ca2+ ions, thiab tuaj yeem nkag mus rau txheej dej ntawm C3S thiab C2S, ua kom cov nag lossis daus ntawm Ca(OH)₂thiab decomposition ntawm calcium silicate. HCOO- ions tuaj yeem txuas ntxiv khi silicon atoms kom hnov mob nrog OH- los ntawm kev siv tshuaj lom neeg, txhawm rau txhawm rau txuas cov pawg silicate uas nyob ib sab, txhawb kev tsim ntawm CSH gel, thiab txhim kho lub zog ntawm cov cement mortar.
Post lub sij hawm: May-31-2024