Ma cellulose ethers pa wall putty

Cellulose ether (hydroxypropyl methylcellulose, HPMC mwachidule) ndiwosakaniza wamba pomanga khoma lamkati lamkati ndipo amatenga gawo lofunikira pakuyika. HPMC yokhala ndi ma viscosities osiyanasiyana imakhudza kwambiri magwiridwe antchito a putty. Pepalali limaphunzira mwadongosolo zotsatira ndi malamulo a ma viscosities osiyanasiyana a HPMC ndi mlingo wake pakuchita kwa putty, ndikutsimikizira kukhuthala kwabwino komanso mlingo wa HPMC mu putty.

Mawu ofunikira: cellulose ether, viscosity, putty, magwiridwe antchito

0.Mawu Oyamba

Ndi chitukuko cha anthu, anthu akufunitsitsa kukhala m'malo abwino a m'nyumba. Pokongoletsa, madera akuluakulu a makoma ayenera kukwapulidwa ndi kusanjidwa ndi putty kuti atseke mabowo. Putty ndi chinthu chofunikira kwambiri chothandizira zokongoletsera. Chithandizo chochepa cha putty chimayambitsa mavuto monga kung'amba ndi kupukuta kwa utoto. Kugwiritsa ntchito zinyalala zamafakitale ndi ma porous minerals okhala ndi zinthu zoyeretsa mpweya kuphunzira nyumba yatsopano yoteteza zachilengedwe yakhala nkhani yovuta kwambiri. Hydroxypropyl methyl cellulose (Hydroxypropyl methyl cellulose, chidule cha Chingerezi ndi HPMC) ndi zinthu zosungunuka za polima p, monga zosakaniza zomwe zimagwiritsidwa ntchito kwambiri pomanga, zimakhala ndi ntchito yabwino yosungira madzi, zimatalikitsa nthawi yogwira ntchito ndikupititsa patsogolo ntchito yomanga, Kupititsa patsogolo ntchito yomanga. . Kutengera kafukufuku wakale experimental, pepala ili anakonza mtundu wa mkati khoma chitetezo chilengedwe putty ndi diatomite monga waukulu zinchito filler, ndipo mwadongosolo anaphunzira zotsatira za kukhuthala osiyana HPMC ndi kuchuluka kwa putty pa putty kukana madzi, kugwirizana mphamvu, koyamba. kuyanika kukana ming'alu, akupera Chikoka cha workability, workability ndi pamwamba nthawi youma.

1. Gawo loyesera

1.1 Yesani zida ndi zida

1.1.1 Zopangira

Mtengo wa 4W-HPMC, 10 W-HPMC, ndi 20 W-HPMC cellulose ether ndi polyvinyl alcohol rabara ufa wogwiritsidwa ntchito poyesa anaperekedwa ndi Kima Chemical Co., Ltd; diatomite inaperekedwa ndi Jilin Diatomite Company; calcium yolemera ndi ufa wa talcum Woperekedwa ndi Shenyang SF Industrial Group; 32.5 R simenti yoyera ya Portland idaperekedwa ndi Yatai Cement Company.

1.1.2 Zida zoyesera

Simenti fluidity tester NLD-3; koyamba kuyanika odana ndi ang'onoang'ono tester BGD 597; wanzeru chomangira mphamvu tester HC-6000 C; kusakaniza ndi mchenga wobalalitsa makina amitundu yambiri BGD 750.

1.2 Njira yoyesera

The chilinganizo zofunika mayeso, ndiye zili simenti, heavy calcium, diatomite, talcum ufa ndi polyvinyl mowa ndi 40%, 20%, 30%, 6% ndi 4% ya okwana misa ufa putty, motero. . Mlingo wa HPMC wokhala ndi ma viscosities atatu osiyanasiyana ndi 1‰, 2‰, 3‰, 4‰ndi 5‰motsatira. Kuti zitheke kufananitsa, makulidwe a putty single-pass yomanga amayendetsedwa pa 2 mm, ndipo digiri yakukulitsa imayendetsedwa pa 170 mm mpaka 180 mm. Zizindikiro zodziwikiratu ndizoyamba kuyanika kukana kwa mng'alu, kulimba kwa ma bond, kukana madzi, katundu wa mchenga, kugwira ntchito komanso nthawi youma.

2. Zotsatira za mayeso ndi zokambirana

2.1 Zotsatira za ma viscosities osiyanasiyana a HPMC ndi mlingo wake pa mphamvu ya bond ya putty

Kuchokera pazotsatira zoyeserera ndi ma curve amphamvu amtundu wa ma viscosities osiyanasiyana a HPMC ndi zomwe zili pa putty's mgwirizano mphamvu, zikhoza kuwoneka kuti putty's kulimba kwa mgwirizano kumawonjezeka koyamba kenako kumachepa ndi kuchuluka kwa zomwe zili mu HPMC. Mphamvu yomangira ya putty imakhala ndi chikoka chachikulu, chomwe chimakwera kuchokera ku 0.39 MPa pomwe zili 1.‰mpaka 0.48 MPa pomwe zomwe zili 3‰. Izi ndichifukwa choti pamene HPMC imamwazikana m'madzi, efa ya cellulose m'madzi imatupa mwachangu ndikuphatikizana ndi ufa wa raba, wolumikizana wina ndi mzake, ndipo mankhwala a simenti amadzingidwa ndi filimuyi ya polima kuti apange gawo la masanjidwe ophatikizika, mgwirizano wa putty Mphamvu imawonjezeka, koma pamene kuchuluka kwa HPMC kuli kwakukulu kwambiri kapena kukhuthala ndipamwamba kwambiri kapena kutsika kwambiri, filimu ya polima yomwe imapangidwa pakati pa HPMC ndi particles ya simenti imakhala ndi kusindikiza, zomwe zimachepetsa mphamvu ya mgwirizano wa putty.

2.2 Zotsatira za ma viscosities osiyanasiyana a HPMC ndi zomwe zili pa nthawi youma ya putty

Itha kuwoneka kuchokera ku zotsatira zoyesa zamitundu yosiyanasiyana ya HPMC ndi mlingo wake pa nthawi yowuma pamwamba pa putty ndi nthawi yowuma pamwamba. Kuchuluka kwa mamasukidwe akayendedwe a HPMC komanso kuchuluka kwa mlingo, ndikotalikirapo nthawi yowuma pamwamba pa putty. /T298-2010), nthawi yowuma ya khoma lamkati lamkati silidzapitilira 120 min, ndipo zomwe zili 10 W.-HPMC imaposa 4‰, ndi zomwe zili mu 20 W-HPMC imaposa 3‰, nthawi youma pamwamba pa putty imaposa zofunikira. Izi zili choncho chifukwa HPMC ili ndi zotsatira zabwino zosungira madzi. HPMC ikasakanizidwa mu putty, mamolekyu amadzi ndi magulu a hydrophilic pamapangidwe a maselo a HPMC amatha kuphatikizana kuti apangitse tinthu tating'onoting'ono. Ma thovu awa ali ndi "roller" zotsatira, zomwe zimapindulitsa ku batching putty Pambuyo poumitsa putty, mpweya wina umakhalapo kuti upange pores odziyimira pawokha, zomwe zimalepheretsa madzi kutuluka mwachangu ndikutalikitsa nthawi yowuma pamwamba pa putty. Ndipo HPMC ikasakanizidwa mu putty, zinthu za hydration monga calcium hydroxide ndi CSH gel mu simenti zimakongoletsedwa ndi mamolekyu a HPMC, omwe amawonjezera kukhuthala kwa pore yankho, amachepetsa kuyenda kwa ayoni mu pore yankho, ndikuchedwanso. ndondomeko ya simenti hydration.

2.3 Zotsatira za ma viscosities osiyanasiyana a HPMC ndi mlingo wake pazinthu zina za putty

Zitha kuwoneka kuchokera ku zotsatira za mayeso a mphamvu ya ma viscosities osiyanasiyana a HPMC ndi kuchuluka kwa putty pazinthu zina za putty. Kuwonjezera kwa HPMC yokhala ndi ma viscosities osiyanasiyana kumapangitsa kuti kuyanika koyambilira kwa mng'alu, kukana madzi ndi kugwira ntchito kwa mchenga kwa putty zonse zachilendo, koma ndi kuwonjezeka kwa kuchuluka kwa HPMC , ntchito yomangamanga yosauka. Chifukwa chakuchulukira kwa HPMC, zochulukira zimakulitsa kusasinthika kwa putty, zomwe zimapangitsa kuti zikhale zovuta kukwapula ndikuwononga ntchito yomanga.

3. Mapeto

(1) Kuphatikizika kwamphamvu kwa putty kumawonjezeka koyamba kenako kumachepa ndi kuchuluka kwa HPMC, ndipo mphamvu yolumikizana ya putty imakhudzidwa kwambiri pamene zomwe zili 10 W-HPMC ndi 3.‰.

(2) Kuchuluka kwa mamasukidwe akayendedwe a HPMC komanso momwe zilili, ndikotalikirapo nthawi yowuma pamwamba pa putty. Pamene zili 10 W-HPMC kuposa 4‰, ndipo zomwe zili mu 20 W-HPMC zimaposa 3‰, nthawi yowuma pamwamba pa putty ndi yaitali kwambiri ndipo sikugwirizana ndi muyezo. Amafuna.

(3) Kuwonjezera ma viscosity osiyanasiyana a HPMC kumapangitsa kuti kuyanika koyambilira kwa ming'alu, kukana madzi ndi mchenga wa putty kukhala wabwinobwino, koma pakuwonjezeka kwa zomwe zili, ntchito yomangayo imakhala yoipitsitsa. Poganizira mozama, magwiridwe antchito a putty osakanikirana ndi 3‰10 W-HPMC ndiye yabwino kwambiri.