Hydroxypropyl methylcellulose ni ifumbire mvaruganda ya polymer, izwi kandi nka resin-soluble resin cyangwa polymer-soluble polymer. Ihindura imvange mukwongera ubwiza bwamazi avanze. Nibikoresho bya hydrophilique polymer. Irashobora gushonga mumazi kugirango ikemuke cyangwa itatanye. Ubushakashatsi bwerekana ko iyo ubwinshi bwa naphthalene bushingiye kuri superplasticizer bwiyongereye, kwinjiza superplasticizer bizagabanya kurwanya ikwirakwizwa rya sima ivanze. Ni ukubera ko naphthalene superplasticizer ari surfactant. Iyo imiti igabanya amazi yongewe kuri minisiteri, igikoresho cyo kugabanya amazi gitunganijwe hejuru yubutaka bwa sima, kuburyo ubuso bwa sima bugira umuriro umwe. Uku kwanga amashanyarazi gusenya imiterere ya flocculation yakozwe nuduce twa sima, hanyuma amazi apfunyitse murwego ararekurwa, bikaviramo gutakaza igice cya sima. Muri icyo gihe, byagaragaye ko hamwe no kwiyongera kwa HPMC, kurwanya ikwirakwizwa rya minisiteri nshya ya sima byabaye byiza kandi byiza.
Imbaraga zingirakamaro za beto:
HPMC mumazi yo mumazi adashobora gukwirakwira ya beto ikoreshwa mubikorwa byubwubatsi bwikiraro cyumuhanda, naho urwego rwo gushushanya ni C25. Ukurikije ikizamini cyibanze, ingano ya sima ni 400 kg, ingano ya microsilica ni 25kg / m3, umubare mwiza wa HPMC ni 0,6% y’amafaranga ya sima, igipimo cy’amazi-sima ni 0.42, umusenyi ni 40%, nibisohoka bya naphthyl superplasticizer ni 8% byamafaranga ya sima. , Ibigereranyo bya beto mu kirere iminsi 28 bifite impuzandengo ya 42.6MPa, naho beto isukwa mumazi muminsi 28 hamwe nigitonyanga cyamazi cya 60mm gifite impuzandengo ya 36.4 MPa.
1. Kwiyongera kwa HPMC bifite ingaruka zigaragara zo kudindiza imvange ya minisiteri. Hamwe no kwiyongera kwa HPMC, igihe cyo gushiraho minisiteri kiraramba. Mubintu bimwe bya HPMC, minisiteri ikozwe mumazi iruta minisiteri ikorwa mukirere. Igihe cyo gukomera cyo kubumba ni kirekire. Iyi mikorere yorohereza kuvoma beto yo mumazi.
2. Isima nziza ya sima ivanze na hydroxypropyl methylcellulose ifite imikorere myiza yo guhuza kandi kuva amaraso.
3. Ibiri muri HPMC hamwe n’amazi ya minisiteri yagabanutse mbere hanyuma byiyongera cyane.
4. Kwinjiza ibikoresho bigabanya amazi biteza imbere ikibazo cyo kongera amazi ya minisiteri, ariko bigomba kugenzurwa mu buryo bushyize mu gaciro, bitabaye ibyo rimwe na rimwe bizagabanya kurwanya ikwirakwizwa ry’amazi yo mu bwoko bwa sima ivanze.
5. Hariho itandukaniro rito mumiterere yikigereranyo cya sima ivanze na HPMC nicyitegererezo cyambaye ubusa, kandi nta tandukaniro rito mumiterere nubucucike bwikigereranyo cya sima mugusuka amazi numwuka. Icyitegererezo cyakozwe nyuma yiminsi 28 mumazi arekuye gato. Impamvu nyamukuru nuko iyongerwaho rya HPMC rigabanya cyane gutakaza no gutatanya sima mugihe cyo gusuka mumazi, ariko kandi bikagabanya ubwuzuzanye bwamabuye ya sima. Mu mushinga, umubare wa HPMC ugomba kugabanuka uko bishoboka kose mugihe hagamijwe ingaruka zo kudatatanya munsi y’amazi.
6. Guhuza HPMC mumazi yo mumazi adashobora gukwirakwizwa na beto, kugenzura amafaranga bifasha mukuzamura imbaraga. Imishinga y'indege yerekanye ko beto ikozwe mumazi ifite imbaraga zingana na 84.8% yibyo byakozwe mukirere, kandi ingaruka ni nini cyane.
Igihe cyo kohereza: Jun-16-2023