Gypsum Hand Plaster ndi chiyani?

Gypsum hand plaster ndi zida zomangira zomwe zimagwiritsidwa ntchito pomaliza makhoma amkati. Ndi chisakanizo cha gypsum, aggregates, ndi zina zowonjezera, ndipo amagwiritsidwa ntchito pamanja ndi antchito aluso pogwiritsa ntchito zida zamanja. Pulasitalayo amaponderezedwa pamwamba pa khoma, kupangitsa kuti ikhale yosalala komanso yomaliza yomwe imatha kusiyidwa ngati ili kapena kupenta.

Gypsum, chinthu chofunikira kwambiri pa pulasitala pamanja, ndi mchere wongochitika mwachilengedwe womwe umakumbidwa kuchokera pansi. Ndizinthu zofewa komanso zoyera zomwe zimaphwanyidwa mosavuta kukhala ufa. Ikasakanizidwa ndi madzi, gypsum imapanga phala lomwe limauma kukhala chinthu cholimba. Katunduyu amapangitsa kuti ikhale yabwino popaka pulasitala.

Zophatikizika, monga mchenga kapena perlite, zimaphatikizidwa kusakaniza kwa pulasitala ya gypsum kuti igwire bwino ntchito, kuchepetsa kuchepa ndi kung'ambika, ndikuwongolera mawonekedwe ake otenthetsera komanso omvera. Zowonjezera zina, monga ulusi wa cellulose kapena zopangira mpweya, zitha kuwonjezeredwa kuti pulasitala ikhale yamphamvu komanso yolimba.

Gypsum hand plaster ndi chinthu chosunthika chomwe chitha kugwiritsidwa ntchito pomaliza makoma amkati. Itha kugwiritsidwa ntchito pamalo aliwonse oyera, owuma, komanso opanda mawu, kuphatikiza konkriti, matabwa, kapena pulasitala. Pulasitala angagwiritsidwe ntchito popanga mapeto osalala kapena opangidwa, malingana ndi maonekedwe omwe mukufuna.

Chimodzi mwazabwino za pulasitala pamanja ndi gypsum ndi katundu wake wosagwira moto. Gypsum ndi chinthu chachilengedwe chosagwira moto chomwe chingathandize kupewa kufalikira kwa moto pakayaka moto. Izi zimapangitsa kukhala chisankho chodziwika kwa nyumba zamalonda ndi zapagulu, komwe chitetezo chamoto chimakhala chodetsa nkhawa.

Ubwino wina wa gypsum dzanja pulasitala ndi chosavuta ntchito. Mosiyana ndi ma pulasitala opangidwa ndi makina, omwe amafunikira zida zapadera, pulasitala ya gypsum ingagwiritsidwe ntchito pamanja pogwiritsa ntchito zida zosavuta zamanja. Izi zimapangitsa kukhala njira yothetsera ndalama zogwirira ntchito zing'onozing'ono kapena madera omwe ndi ovuta kuwapeza.

Komano, cellulose ether ndi polima wosungunuka m'madzi wotengedwa ku cellulose yachilengedwe. Nthawi zambiri amagwiritsidwa ntchito popaka gypsum pamanja ngati chowonjezera kuti zinthuzo zigwire bwino ntchito.

Ma cellulose ether amawonjezeredwa ku gypsum pulasitala kusakaniza kuti apititse patsogolo zinthu zake monga kusunga madzi, kumamatira, komanso kugwira ntchito. Amakhala ngati thickener, kulola pulasitala kufalikira mosavuta komanso mofanana pamwamba, kuchepetsa kung'ambika ndi kukonzanso maonekedwe ake onse. Imagwiranso ntchito ngati chomangira, kugwira chosakaniza pamodzi ndikuwongolera kumamatira kwake pamwamba.

Makhalidwe osungira madzi a cellulose ether ndi ofunika kwambiri pa pulasitala pamanja ya gypsum. Gypsum pulasitala imafuna chinyezi chambiri kuti ikwaniritse bwino komanso kuumitsa. Popanda kusungidwa bwino kwa madzi, pulasitala imatha kuuma mwachangu, zomwe zimapangitsa kung'ambika, kuchepa, ndi zolakwika zina. Cellulose ether imathandiza kusunga madzi mu pulasitala, kuchepetsa kuyanika ndi kuonetsetsa kuti pulasitalayo imakhazikika bwino.

Kuphatikiza pa kusungirako madzi ndi kukhuthala, cellulose ether imathanso kupititsa patsogolo kutentha komanso kutsekemera kwamphamvu kwa pulasitala wamanja wa gypsum. Powonjezera ulusi wa cellulose pakusakaniza, pulasitalayo imatha kupereka mayamwidwe abwino komanso kutsekereza, kupangitsa kuti nyumbayo ikhale yabwino komanso yopatsa mphamvu.

Kusankhidwa ndi kuchuluka kwa ether ya cellulose yowonjezeredwa ku pulasitala ya manja ya gypsum kungakhudze kwambiri magwiridwe ake ndi magwiridwe ake. Mitundu yosiyanasiyana ya etha ya cellulose ilipo, monga hydroxyethyl cellulose (HEC), methyl cellulose (MC), ndi carboxymethyl cellulose (CMC), iliyonse ili ndi zakezake komanso mawonekedwe ake. Mtundu ndi kuchuluka kwa ether ya cellulose yowonjezeredwa kusakaniza kwa pulasitala iyenera kusankhidwa mosamala potengera zofunikira za polojekitiyi.

Mwachidule, gypsum hand plaster ndi zida zomangira zomwe zimagwiritsidwa ntchito pomaliza khoma lamkati. Ndi chisakanizo cha gypsum, aggregates, ndi zina zowonjezera, ndipo amagwiritsidwa ntchito pamanja ndi antchito aluso pogwiritsa ntchito zida zamanja. Gypsum pamanja pulasitala ndi zosagwira moto, yosavuta kugwiritsa ntchito, ndipo angagwiritsidwe ntchito popanga zomaliza zosiyanasiyana.