Ifu ya sitashi ikoreshwa cyane cyane mu byuma by’ubwubatsi, ibyo bikaba bishobora kugira ingaruka ku buryo ifu ya sitashi ishingiye kuri gypsum, sima na lime, kandi bigahindura imiterere n’ubudahangarwa bwa sitashi. Ifu ya sitashi ikoreshwa cyane hamwe na eteri za cellulose zitahinduwe cyangwa zahinduwe. Ikwiriye haba muri sisitemu zidafite aho zibogamiye cyangwa iz’alkaline, kandi ijyanye n’inyongera nyinshi mu bikoresho bya gypsum na sima (nk’ibinyabutabire, MC, sitashi na polyvinyl acetate n’izindi polymer zishongesha amazi).
Ibiranga by'ingenzi:
(1) Ifu ya sitashi ikoreshwa hamwe na methyl cellulose ether, bigaragaza ingaruka nziza hagati y’ibyo byombi. Kongeramo ingano ikwiye ya sitashi muri methyl cellulose ether bishobora kongera cyane ubudahangarwa bwo kugabanuka no kudahungabanywa kwa mortilage, hamwe n’umusaruro mwinshi.
(2) Kongeramo ingano ikwiye ya eteri ya sitashi kuri mortier irimo eteri ya methyl cellulose bishobora kongera cyane imiterere ya mortier no kunoza uburyo ikoreshwa, bigatuma imiterere yayo irushaho kuba myiza kandi gukurura kwayo bikaba byoroshye.
(3) Kongeramo ingano ikwiye ya sitashi kuri mortila irimo methyl cellulose ether bishobora kongera amazi yo kubika mortila no kongera igihe cyo gufungura.
(4) Ifu ya sitashi ni ifu ya sitashi yahinduwe mu buryo bw'imiti ishongeshwa mu mazi, ihuye n'ibindi bikoresho byongera mu ifu yumye, ikoreshwa cyane mu gufunga amatafari, ifu yo gusana, ifu ya sitashi, ifu yo mu nzu n'inyuma, ifu ishingiye kuri gypsum n'ibikoresho byo kuzuza, ibikoresho byo guhuza, ifu ya sitashi.
Ibiranga eteri ya sitashi ahanini biri muri ibi bikurikira: (a) kunoza ubudahangarwa bw'amazi; (b) kunoza ubushobozi bwo gukora; (c) kunoza uburyo amazi abikwamo muri sitroberi.
Ingano y'ikoreshwa:
Ifu ya sitashi ikwiriye ubwoko bwose bwa (simenti, gypsum, lime-calcium) putty y'imbere n'inyuma y'inkuta, hamwe n'ubwoko bwose bwa sima ireba imbere n'iy'ibumba.
Ishobora gukoreshwa nk'uruvange rw'ibicuruzwa bishingiye kuri sima, ibikomoka kuri gypsum n'ibikomoka kuri lime-calcium. Ifu ya sitashi ihuye neza n'izindi nyubako n'uruvange; ikwiriye cyane cyane mu nganda zivanze byumye nka mortier, kole, gusigwa no gusigwa. Ifu ya sitashi na methyl cellulose ethers (Tylose MC grades) bikoreshwa hamwe mu nganda zivanze byumye kugira ngo birusheho gukomera, imiterere ikomeye, kudakomera no koroshya gufata. Ubukana bwa mortier, kole, plaster na roll renders zirimo methyl cellulose ethers nyinshi bushobora kugabanuka iyo hongewemo starch ethers.
Igihe cyo kohereza: Kamena-13-2023