Hydroxypropyl methyl cellulose imatha kupititsa patsogolo kukana kwa matope a simenti

Dispersion resistance ndi ndondomeko yofunikira yaukadaulo yoyezera mtundu wa anti - dispersant.Hydroxypropyl methyl cellulose ndi polima osungunuka m'madzi, omwe amadziwikanso kuti utomoni wosungunuka m'madzi kapena polima wosungunuka m'madzi.Zimawonjezera kusakanikirana kwa kusakaniza mwa kuwonjezera kukhuthala kwa madzi osakaniza.Ndi mtundu wa hydrophilic polima zakuthupi, zomwe zimatha kusungunuka m'madzi ndikupanga yankho kapena madzi otayika.Mayesero amasonyeza kuti pamene kuchuluka kwa naphthalene system superplasticizer kumawonjezeka, kuwonjezera kwa superplasticizer kudzachepetsa kukana kwa kubalalitsidwa kwamatope atsopano a simenti.Ichi ndi chifukwa naphthalene mndandanda mkulu kothandiza madzi kuchepetsa wothandizila wa pamwamba yogwira wothandizila, pamene madzi kuchepetsa wothandizila anawonjezera matope, ndi kuchepetsa wothandizila madzi mu simenti tinthu pamwamba zochokera pamwamba pa simenti particles ndi mlandu womwewo, ndi magetsi kukana flocculation. kapangidwe ka simenti particles opangidwa ndi kugawa, kukulunga mu dongosolo la madzi kumasulidwa, adzachititsa imfa ya gawo la simenti.Nthawi yomweyo, zimapezeka kuti pakuwonjezeka kwa HPMC, kufalikira kwa matope atsopano a simenti kumakhala bwinoko.

Mphamvu za konkriti:

HPMC pansi pa madzi osakaniza konkire osabalalitsa anagwiritsidwa ntchito mu uinjiniya maziko mlatho wa Expressway, ndipo kalasi mphamvu kapangidwe anali C25.Pambuyo pa mayeso oyambira, simenti mlingo ndi 400kg, pawiri wosakaniza silika fume 25kg/m3, HPMC mulingo momwe akadakwanitsira mlingo ndi 0.6% simenti mlingo, madzi simenti chiŵerengero ndi 0,42, mchenga mlingo 40%, naphthalene mkulu dzuwa kuchepetsa wothandizila madzi zokolola ndi 8% wa simenti mlingo, chitsanzo konkire mu mpweya 28d, mphamvu pafupifupi ndi 42.6MPa, The pafupifupi mphamvu ya m'madzi anatsanulira konkire ndi kugwa kutalika kwa 60mm m'madzi ndi 36.4mpa kwa masiku 28, ndi chiŵerengero cha mphamvu ya konkire anapanga mu madzi ndi konkire yopangidwa mumlengalenga ndi 84.8%, kusonyeza zotsatira zazikulu.

1. Kuwonjezera kwa HPMC kumakhala ndi zotsatira zoonekeratu zochepetsera pamatope osakaniza.Ndi kuchuluka kwa mlingo wa HPMC, nthawi yoyika matope imakulitsidwa motsatizana.Pansi pa mkhalidwe womwewo wa mlingo wa HPMC, nthawi yoyika matope apansi pamadzi ndi yayitali kuposa mpweya.Mbaliyi ndi yopindulitsa popopera konkire pansi pa madzi.

2, wosakanikirana ndi hydroxypropyl methyl cellulose ya matope atsopano a simenti ali ndi mgwirizano wabwino, pafupifupi palibe chodabwitsa chotaya magazi.

3, Mlingo wa HPMC ndi kufunikira kwa madzi amtondo kudatsika kenako ndikuwonjezeka kwambiri.

4. Kuphatikizika kwa chochepetsera madzi kumawongolera vuto la kuchuluka kwa madzi amatope, koma kuyenera kuyendetsedwa moyenera, apo ayi nthawi zina kumachepetsa kukana kwamadzi am'madzi amatope atsopano a simenti.

5. Pali kusiyana pang'ono pamapangidwe pakati pa zitsanzo za HPMC zosakanikirana ndi simenti zosakanikirana ndi zitsanzo zopanda kanthu, ndipo pali kusiyana pang'ono pamapangidwe ndi kuphatikizika pakati pa zitsanzo za simenti zotsanuliridwa ndi mpweya wotsanuliridwa wa simenti.Chitsanzo cha 28d chowumba pansi pamadzi ndichomasuka pang'ono.Chifukwa chachikulu ndi chakuti kuwonjezera kwa HPMC kumachepetsa kwambiri kutaya ndi kubalalitsidwa kwa simenti pa nthawi yothira madzi, komanso kumachepetsanso kuphatikizika kwa simenti.Mu pulojekitiyi, pansi pa chikhalidwe chowonetsetsa kuti pansi pa madzi osabalalika, kuchuluka kwa kusakaniza kwa HPMC kumachepetsedwa momwe mungathere.

6, kuwonjezera HPMC m'madzi si kumwazikana konkire admixture, kulamulira kuchuluka kwa mphamvu zabwino, woyendetsa polojekiti limasonyeza kuti chiŵerengero cha mphamvu kupanga konkire m'madzi ndi kupanga mu mpweya ndi 84,8%, zotsatira zake ndi zofunika kwambiri.