Cellulose ether izadindiza hydrata ya sima kurwego rutandukanye, ibyo bigaragarira mugutinda gushiraho ettringite, gel CSH na hydroxide ya calcium. Kugeza ubu, uburyo bwa selulose ether itinda hydrata ya sima ahanini ikubiyemo gutekereza ko inzitizi zibangamira kugenda, kwangirika kwa alkali na adsorption.
1. Hypothesis yo kubuza ion kugenda
Biravugwa ko ethers ya selile yongerera ubwiza bwumuti wa pore, bikabuza umuvuduko wimikorere ya ion, bityo bigatinda amazi ya sima. Nyamara, muri ubu bushakashatsi, selile ya selile ifite ubukonje buke ifite ubushobozi bukomeye bwo gutinza sima, bityo iyi hypothesis ntabwo ifata. Mubyukuri, igihe cyo kwimuka kwa ion cyangwa kwimuka ni kigufi cyane, biragaragara ko ntagereranywa nigihe cyo gutinda kwa sima.
2. Kwangirika kwa alkaline
Polysaccharide ikunze kwangirika byoroshye mugihe cya alkaline kugirango ikore hydroxycarboxylic acide itinda amazi ya sima. Kubwibyo rero, impamvu ituma selulose ether idindiza hydrata ya sima irashobora kuba iyangirika muri sima ya alkaline ciment kugirango ibe acide hydroxycarboxylic acide, ariko ubushakashatsi bwerekanye ko ether ya Cellulose ihagaze neza mubihe bya alkaline, gusa yangiritse gato, kandi nibicuruzwa byangiritse nta nkurikizi bifite. ku gutinda kwa sima.
3. Kwinjira
Adsorption irashobora kuba impamvu nyayo ituma selile ether idindiza hydrata ya sima. Inyongeramusaruro nyinshi zizajya zangiza ibice bya sima nibicuruzwa biva mu mazi, birinda isenyuka rya sima no gutondekanya ibicuruzwa biva mu mazi, bityo bikadindiza amazi no gushiraho sima. Byagaragaye ko ether ya selile yoroha cyane kuri hydroxide ya calcium, C. S． Ubuso bwibicuruzwa biva mumazi nka H gel na calcium aluminate hydrate, ariko ntibyoroshye kwamamazwa na ettringite nicyiciro kidafite amazi. Byongeye kandi, kubijyanye na selulose ether, ubushobozi bwa adsorption ya HEC burakomeye kuruta ubwa MC, kandi uko hasi ya hydroxyethyl muri HEC cyangwa hydroxypropyl muri HPMC, imbaraga za adsorption nizo zikomeye: mubijyanye nibicuruzwa bitanga amazi, hydrogen Ubushobozi bwa adsorption ya calcium oxyde C. S． Ubushobozi bwa adsorption ya H irakomeye. Ubundi isesengura ryerekana kandi ko ubushobozi bwa adsorption bwibicuruzwa biva mu mazi hamwe na selile ya selile bifitanye isano ijyanye no gutinda kwa hydrata ya sima: uko adsorption ikomera, niko bigaragara ko gutinda, ariko adsorption ya ettringite kuri selile ya ether iba ifite intege nke, ariko kuyikora yatinze cyane. Ubushakashatsi bwerekanye kandi ko ether ya selulose ifite adsorption ikomeye kuri silikatike ya tricalcium nibicuruzwa byayo biva mu mazi, bityo bikadindiza cyane hydratiya yicyiciro cya silikatike, kandi ikagira adsorption nkeya kuri ettringite, ariko gushiraho ettringite birabujijwe. Biragaragara ko yatinze, ibi ni ukubera ko gutinda kwa ettringite bigira ingaruka ku buringanire bwa Ca2 + mu gisubizo, aribwo buryo bwo gukomeza gutinda kwa silikate yatinze ya selile ya ether.
Mu bisubizo by'ibizamini, ubushobozi bwo kudindiza HEC burakomeye kuruta ubwa MC, kandi ubushobozi bwa selulose ether yo gutinza ishingwa rya hydroxide ya calcium irakomeye kuruta iya C. S． Ubushobozi bwa H gel na ettringite burakomeye, bufite isano ijyanye nubushobozi bwa adsorption ya selulose ether nibicuruzwa bitanga amazi. Byemejwe kandi ko adsorption ishobora kuba impamvu nyayo ituma selireose ether idindiza hydrata ya sima, hamwe na selile ether hamwe nibicuruzwa bitanga sima bifitanye isano. Nubushobozi bukomeye bwa adsorption yibicuruzwa bitanga amazi ya sima, niko bigaragara cyane ko ibicuruzwa byatinze bitinze. Ibisubizo by'ibizamini byabanje byerekana ko ether zitandukanye za selile zifite ingaruka zitandukanye kubukererwe bwa sima ya Portland, kandi ether imwe ya selile ifite ingaruka zitandukanye zo gutinda kubicuruzwa bitandukanye bitanga amazi, byerekana ko ibicuruzwa bya hydrata ya Portland bigira ingaruka zitandukanye kuri fibre. Adorption ya selulose ether iratoranya, kandi adsorption ya selulose ether kubicuruzwa bya hydrata ya sima nayo iratoranya.
Igihe cyo kohereza: Gashyantare-27-2023