Kimwe mu bitandukanya cyane hagati y’uruvange rw’ibinyabutabire byumye n’uruvange rusanzwe ni uko uruvange rw’ibinyabutabire byumye ruhindurwa hakoreshejwe inyongeramusaruro nke za shimi. Kongeramo inyongeramusaruro imwe kuri uruvange rw’ibinyabutabire byumye byitwa ihinduka ry’ibanze, kongeramo inyongeramusaruro ebyiri cyangwa nyinshi byitwa ihinduka ry’ibanze. Ubwiza bwa ruvange rw’ibinyabutabire byumye buterwa n’uburyo bukwiye bwo guhitamo ibice no guhuza no guhuza ibice bitandukanye. Kubera ko inyongeramusaruro za shimi zihenze cyane, kandi zigira ingaruka zikomeye ku mikorere ya ruvange rw’ibinyabutabire byumye. Kubwibyo, mu guhitamo inyongeramusaruro, ingano y’inyongeramusaruro igomba guhabwa umwanya wa mbere. Ibi bikurikira ni incamake y’uburyo bwo guhitamo eteri ya shimi yongeramo cellulose.
Cellulose ether yitwa kandi rheology modifier, imvange ikoreshwa mu guhindura imiterere ya rheological ya mortilla ivunganye vuba, kandi ikoreshwa mu bwoko hafi ya bwose bwa mortilla. Imiterere ikurikira igomba kwitabwaho mu guhitamo ubwoko bwayo n'ingano yayo:
(1) Kubika amazi mu bushyuhe butandukanye;
(2) Ingaruka zo gukomera, ubushyuhe;
(3) Isano iri hagati y’ubushyuhe n’ihindagurika ry’ikirere, n’ingaruka ku bushyuhe bw’ikirere iyo hari electrolyte;
(4) Imiterere n'urwego rwa etherification;
(5) Kunoza uburyo bwo gushyira ibintu mu buryo bwa mortical thixotropy no kubishyiraho (ibi ni ngombwa kugira ngo mortical irangwe ku buso buhagaze);
(6) Umuvuduko wo gusesa, imiterere n'uko iseswa ryuzuye.
Uretse kongeramo eteri ya cellulose (nk'iya methyl cellulose ether) ku ifu yumye, eteri ya polyvinyl aside vinyl nayo ishobora kongerwamo, ni ukuvuga, impinduka ya kabiri. Ibikoresho bifunga ibintu (simenti, gypsum) muri iyo sima bishobora kwemeza imbaraga nyinshi zo gukanda, ariko bigira ingaruka nke ku mbaraga zo gukurura no gukomera kw'ingufu. Acetate ya polyvinyl yubaka agahu gakomeye mu mwenge w'ibuye rya sima, bigatuma iyo sima ishobora kwihanganira imitwaro myinshi yo guhinduka no kunoza ubudahangarwa bw'ingufu. Imyitozo yagaragaje ko kongeramo ingano zitandukanye za eteri ya methyl cellulose na eteri ya polyvinyl aside vinyl kuri iyo sima yumye bishobora gutegura sima yoroshye yo gusiga, sima yo gusigwa, sima yo gusiga amarangi yo gushushanya, na sima yo gusiga ku mabuye ya sima irimo umwuka. Hamwe n'iyi sima yo gusuka hasi, nibindi. Kuvanga byombi ntibishobora kongera ubwiza bwa sima gusa, ahubwo binanongera cyane imikorere myiza y'ubwubatsi.
Mu buryo bufatika, kugira ngo kunoze imikorere rusange, ni ngombwa gukoresha inyongeramusaruro nyinshi hamwe. Hariho igipimo cyiza cyo guhuza hagati y’inyongeramusaruro. Igihe cyose urugero rw’ingano n’igipimo bikwiye, bishobora kunoza imikorere ya mortiweri mu buryo butandukanye. Ariko, iyo bikoreshejwe byonyine, ingaruka zo guhindura mortiweri ziba nke, ndetse rimwe na rimwe n’ingaruka mbi, nko kongeramo cellulose yonyine, mu gihe byongera ubufatanye bwa mortiweri no kugabanya urugero rwo gutandukana, byongera cyane ikoreshwa ry’amazi ya mortiweri no kuyigumisha mu gishishwa, bigatuma imbaraga zo gukanda zigabanuka cyane; Iyo bivanze n’ikintu gitera umwuka, nubwo urwego rwo gushyira mu byiciro mortiweri rushobora kugabanuka cyane, kandi ikoreshwa ry’amazi naryo riragabanuka cyane, ariko imbaraga zo gukanda mortiweri zikunda kugabanuka bitewe n’udupira twinshi tw’umwuka. Kugira ngo hongerwe imikorere ya mortiweri ya martiweri ku rugero runini, kandi icyarimwe hirindwe kwangirika ku yindi miterere ya mortiweri, imiterere, imiterere n’imbaraga bya mortiweri ya martiweri bigomba kuzuza ibisabwa n’umushinga n’ibisobanuro bya tekiniki bireba. Muri icyo gihe, nta gusiga ishwagara ry'indimu bikoreshwa, bizigama. Ku birebana na sima, kurengera ibidukikije, n'ibindi, ni ngombwa gufata ingamba zihamye, guteza imbere no gukoresha ibivange bivanze mu buryo bwo kugabanya amazi, kwiyongera k'ubushyuhe, kubika amazi no kuyagwingira, no gushyira pulasitiki mu mwuka.
Igihe cyo kohereza: Gicurasi-08-2023