Hydroxypropyl methylcellulose ni polymer ishongera mu mazi, izwi kandi nka resin ishongera mu mazi cyangwa polymer ishongera mu mazi. Ikomeza uruvange binyuze mu kongera ubukana bw'amazi avanga. Ni polymer ikunda amazi. Ishobora gushonga mu mazi kugira ngo ikore umuti cyangwa ikwirakwira. Igerageza ryerekana ko iyo ingano ya superplasticizer ishingiye kuri naphthalene yiyongereye, gushyiramo superplasticizer bizagabanya ubukana bw'isima nshya ivanze. Ibi biterwa nuko naphthalene superplasticizer ari surfactant. Iyo igikoresho gigabanya amazi cyongewe kuri sima, igikoresho gigabanya amazi gishyirwa ku buso bw'uduce twa sima, ku buryo ubuso bw'uduce twa sima bufite umuriro umwe. Uku gukurura amashanyarazi gusenya imiterere ya flocculation yakozwe n'uduce twa sima, maze amazi apfunyitse mu nyubako ararekurwa, bigatuma igice cya sima gitakaza. Muri icyo gihe, byagaragaye ko uko HPMC yiyongera, ubukana bw'isima nshya ya sima bwarushijeho kuba bwiza.
Imiterere y'imbaraga za sima:
HPMC ivangwa na sima idashonga munsi y’amazi ikoreshwa mu buhanga bw’imihanda, kandi imbaraga z’igishushanyo mbonera ni C25. Dukurikije ikizamini cy’ibanze, ingano ya sima ni 400kg, ingano ya microsilica ni 25kg/m3, ingano nziza ya HPMC ni 0.6% by’ingano ya sima, ikigereranyo cy’amazi na sima ni 0.42, ikigereranyo cy’umucanga ni 40%, naho umusaruro wa naphthyl superplasticizer ni 8% by’ingano ya sima. , Ingero za sima mu kirere mu minsi 28 zifite imbaraga mpuzandengo ya 42.6MPa, kandi sima isukwa munsi y’amazi mu minsi 28 ifite igitonyanga cy’amazi cya 60mm ifite imbaraga mpuzandengo ya 36.4 MPa.
1. Kongeramo HPMC bigira ingaruka zigaragara ku gutinza uruvange rwa morti. Uko ingano ya HPMC yiyongera, igihe cyo gushyiraho morti kigenda cyiyongera buhoro buhoro. Mu gihe ingano imwe ya HPMC iri munsi y'amazi, morti yakozwe munsi y'amazi iba nziza kurusha morti yakozwe mu kirere. Igihe cyo gukonja cyo gucura ni kirekire. Iki gikorwa cyorohereza kuvoma sima munsi y'amazi.
2. Sima nshya ivanze na hydroxypropyl methylcellulose ifite ubushobozi bwo gufatanya neza kandi ntiva amaraso menshi.
3. Ingano ya HPMC n'ibikenewe mu mazi bya mortiweri byaragabanutse mbere hanyuma birushaho kwiyongera cyane.
4. Gushyiramo umuti ugabanya amazi bikemura ikibazo cy’ubwiyongere bw’amazi akenewe kuri sima, ariko bigomba kugenzurwa mu buryo bukwiye, bitabaye ibyo rimwe na rimwe bizagabanya ubushobozi bwo gukwirakwira mu mazi bwa sima nshya ivanze.
5. Nta tandukaniro rinini riri mu miterere y’icyitegererezo cya sima kivanze na HPMC n’icyitegererezo cy’ubusa, kandi nta tandukaniro rinini riri mu miterere n’ubucucike bw’icyitegererezo cya sima mu mazi no mu mwuka bisukwa. Icyitegererezo cyakozwe nyuma y’iminsi 28 munsi y’amazi kiba cyarekuye gato. Impamvu nyamukuru ni uko kongeramo HPMC bigabanya cyane igihombo n’ikwirakwira rya sima mu gihe cyo kuyisukamo, ariko kandi bigabanya ubucucike bw’amabuye ya sima. Muri uwo mushinga, ingano ya HPMC igomba kugabanuka uko bishoboka kose mu gihe hakorwa ibishoboka byose kugira ngo hatabaho ingaruka zo kudakwirakwira munsi y’amazi.
6. Guhuza HPMC ivanze na sima idashonga munsi y'amazi, kugenzura ingano yayo bituma imbaraga zayo ziyongera. Imishinga y'igerageza yagaragaje ko sima ikorerwa mu mazi ifite igipimo cy'imbaraga cya 84.8% by'izo ikorerwa mu kirere, kandi ingaruka zayo ni nini kurushaho.
Igihe cyo kohereza: Kamena-16-2023