Plasta - a nwapụtaworo na ihe n'ihi na ọtụtụ narị afọ

Ọtụtụ mgbe, n'okpuru iche iche finishing ọrụ iji a ihe dị otú ahụ dị ka gypsum plaster. Ọbụna ndị na-anya site idozi na imewe, mara nke a aha. N'ihi na ọtụtụ narị afọ, ọ bụ ezigbo ihe maka nwughari na ndozi nke ụlọ.

Nnọọ finely ground gypsum plaster anaghị ike a dị iche n'etiti ọhụrụ na agadi mkpuchi mgbidi na uko ụlọ. O nwere ihe ndị magburu onwe Ọdịdị na ọ na-adịghị ịgbawa. Arụ ọrụ na plaster-amalite site agwakọta ya na mmiri. Na kwesịrị ekwesị na-anọgidesi nke ihe n'ụzọ zuru okè jupụtara n'ime cracks na-ewe n'ụdị ọbụna obere nkọwa.

Plasta nwere a porous Ọdịdị, ka ndị nile na-ebupụta emeso ya na nke a ihe onwunwe, nakwa ike nke na-adọrọ ụda ebili mmiri, si otú huu ụda mkpuchi nke ụlọ. The acha ọcha na agba nke a ihe onwunwe na-eme ka o kwe omume iji ya na-enweghị ọzọ staining ebe dị mkpa ezigbo ọcha coatings.

Olee otú nke a ewu ihe owuwu? Natural gypsum, na-enwe a crystalline Ọdịdị, na-emeso na elu okpomọkụ. N'ihi ya, ọ na ọnwụ nke ¾ nke mmiri dị n'ime ya, na converted n'ime ịnweta onwe ya hemihydrate nke, mgbe weere mmiri ọzọ na-enweta a eke nkume Ọdịdị. Ebe ọ bụ na ọ dịghị ihe karịrị 1% nke gypsum na-agbakwunyere na ndị ọzọ organic ihe onwunwe nke eke bekee, ọ bụ environmentally mma maka ụmụ mmadụ na ụmụ anụmanụ. Nke a ewu ihe owuwu nke Refractories, ya mere ekere òkè dị mkpa na-echebe ụlọ si ọkụ. Ke adianade niile ndị a Njirimara, ọ bụ ike banye ngafe mmiri ke ogige n'oge ya n'omume na ẹsụhọde enye mmiri na ya larịị.

Gypsum arụpụta ọtụtụ iche. Common ewu ihe eji maka n'ichepụta gypsum ihe na gypsum ngwaahịa, plaster mbadamba, ogwe na nkebi efere, gypsum-lime plaster ngwọta. High gypsum ebu na-emepụta site pụrụ iche n'ibu ndozi ot ewu ihe onwunwe site na-edo ya a n'ihu ọcha na milled. N'ihi na ọ na-eme stucco na ndị ọzọ ji achọ ngwaahịa maka interiors na facades. Plasta iche iche site na oge nke ya ime: 2-15 nkeji - ngwa ngwa ọnọdụ; 6-30 nkeji - nkịtị-ọnọdụ; ihe karịrị 20 nkeji - na ngwa ngwa-ọnọdụ.

The ike nke ihe a kpebisiri ike site akara, nke dị iche iche n'ime ya compressive ike (F-2, 3, 4, 5, 6, 7, 15, 10, 19, 16, 22, 25). Gypsum ụdị G-10, 16, 15 a na-atụle ga-akpụ. Ndị dị otú ahụ ihe onwunwe bụ n'ụzọ free nke adịghị na a elu ike.

Mgbe na-arụ ọrụ a ihe onwunwe ga-echeta na ọ na ngwa ngwa freezes, n'ihi ya, ọ bụghị naanị esi nri a nnukwu ego nke diluted plaster. The ego nke mmiri chọrọ na-emepụta a ngwakọta nke nkịtị anọgidesi, bụ a 50-80% (maka ọrụ owuwu) na 35-45% n'ihi na e kere eke nke dị iche iche na ngwaahịa. Oké mmiri nwere ike ịnọgide na-ahụ pores nke obi tara mmiri na ihe onwunwe, whereupon ya anwụ na-amịrị. Dị ka a N'ihi ya, ndị porosity nke plaster ga-odika 50-60%. Ọ dị mkpa ka anyị cheta na obere mmiri na-eji maka dilution nke gypsum, ndị denser ga-abụ ndị ikpeazụ ngwaahịa ma ọ bụ mkpuchi, na ukwuu ya anwụ ngwa ngwa. Ịzụ ma ọ bụ ẹsụhọde okpomọkụ merụsịrị-emetụta ume nke sikwuo ike ihe. Dịkwuo ike nke gypsum plaster mgbe ụfọdụ kwukwara thereto banyere 5% slaked wayo.

Maka ọgwụ eji na-akpọ polima emepụta gypsum, nke na-adị mfe etinyere ihe merụrụ ahụ ọrịa ahụ site na bandeeji. Ọ n'ụzọ zuru okè na-agbaso contours na nwere nnukwu elongation. Nke a ihe onwunwe elu porosity, otú ahụ ụmụ mmadụ na anụ na-eku ume kpamkpam, nke na-egbochi omume nke oko. Mgbe ụfọdụ, ndị a ákwà na-etinyere ka ọrịa nwere ike ime ụfọdụ ije. Nke a ihe onwunwe anaghị egbochi usoro ọgwụgwọ na mmejuputa ihe X-ray nyochaa.