Focus on Cellulose ethers

Njirimara bụ isi nke ngwa agha Drymix

Drymix Mortar bụ nke a na-ejikarị na otu n'ime ihe ndị dị mkpa na nhazi ihe owuwu ọgbara ọhụrụ. Ihe mejupụtara ya bụ ciment, ájá na ihe mgbakwunye. Simenti bụ isi ihe eji eme ciment. Taa, ka anyị mụtakwuo banyere ihe ndị bụ isi nke drymix Mortar.

Ngwa agha ihe owuwu: Ọ bụ ihe eji arụ ọrụ nke a kwadebere site na cimenting ihe, nchịkọta dị mma, admixture na mmiri n'ụzọ kwesịrị ekwesị.

Ngwa agha masonry: Ngwa ngwa nke na-ejikọta brik, okwute, blọk, wdg n'ime ihe a na-akpọ masonry mortar. Masonry Mortar na-arụ ọrụ nke simenti blocks na ibunye ibu, na bụ akụkụ dị mkpa nke masonry.

1. Ihe mejupụtara nke ngwa agha masonry

(1) Ihe simenti na admixture

Ihe ndị a na-eji simenti a na-ejikarị eme ihe na ngwa ngwa masonry gụnyere ciment, paste lime, na ụlọ gypsum.

A ga-ahọrọ ọkwa ike nke ciment a na-eji maka ngwa agha masonry dị ka ihe a chọrọ si dị. Ọkwa ike nke ciment eji na ciment mortar ekwesịghị ịbụ ihe karịrị 32.5; ike ọkwa nke ciment eji na ciment agwakọta ngwa agha ekwesịghị ịbụ ihe karịrị 42.5.

Iji mee ka ngwa ngwa rụọ ọrụ nke ọma ma belata ọnụ ọgụgụ simenti, a na-ejikọta ụfọdụ pasta lime, ụrọ ma ọ bụ uyi ofufe n'ime ngwa ngwa ciment, na ngwa ngwa a kwadebere n'ụzọ dị otú a ka a na-akpọ ciment mix mortar. Ihe ndị a agaghị enwe ihe ndị na-emerụ ahụ nke na-emetụta arụmọrụ nke ngwa agha ahụ, na mgbe ha nwere akụkụ ma ọ bụ agglomerates, a ga-ehichapụ ha na oghere oghere 3 mm. Agaghị eji ntụ ntụ lime slaked mee ihe ozugbo na ngwa agha masonry.

(2) Nchịkọta dị mma

Aja a na-eji ngwa agha masonry kwesịrị ịbụ aja na-adịchaghị ala, ebe a na-akwa akwa akwa kwesịrị ịbụ ájá siri ike. Ọdịnaya apịtị nke ájá ekwesịghị ịfe 5%. Maka ngwa ngwa eji ciment-agwakọta ya na ọkwa ike nke M2.5, ọdịnaya apịtị nke ájá ekwesịghị ịfe 10%.

(3) Ihe ndị chọrọ maka mgbakwunye

Dị ka mgbakwunye nke admixtures na ihe, iji meziwanye ụfọdụ ngwa ngwa, admixtures dị ka plasticizing, mmalite ike,cellulose ether, antifrize, na retarding nwekwara ike ịgbakwunye. N'ozuzu, ekwesịrị iji admixtures inorganic mee ihe, na ụdị na usoro ha kwesịrị ikpebi site na nnwale.

(4) Ihe achọrọ maka mmiri ngwa ngwa bụ otu ihe ahụ maka kọmpụta.

2. Nkà na ụzụ Njirimara nke masonry ngwa agha ngwakọta

(1) Mmiri nke ngwa agha

Arụmọrụ nke ngwa agha na-eru n'okpuru ibu nke ya ma ọ bụ ike mpụga ka a na-akpọ fluidity nke ngwa agha, nke a na-akpọkwa nkwụsi ike. Ndekọ nke na-egosi mmiri mmiri nke ngwa agha ahụ bụ ogo imi, nke a na-atụ site na mita nkwekọ ngwa agha, na nkeji ya bụ mm. Nhọrọ nke ngwa agha na-agbanwe agbanwe na oru ngo na-adabere n'ụdị nke masonry na ọnọdụ ihu igwe na-ewu ụlọ, nke a pụrụ ịhọrọ site na-ezo aka na Tebụl 5-1 ("Code for Construction and Acceptance of Masonry Engineering" (GB51203-1998)).

Ihe ndị na-emetụta mmiri mmiri nke ngwa agha bụ: oriri mmiri nke ngwa ngwa, ụdị na ọnụ ọgụgụ nke ihe simenti, ọdịdị ahụ na gradation nke nchịkọta, ọdịdị na usoro ọgwụgwọ nke admixture, ịdị n'otu nke ngwakọta, wdg.

(2) Njide mmiri nke ngwa agha

N'oge njem, ebe a na-adọba ụgbọala na iji ngwa agha agwakọta, ọ na-egbochi nkewa n'etiti mmiri na ihe siri ike, n'etiti ezigbo slurry na mkpokọta, na ike idobe mmiri bụ njigide mmiri nke ngwa agha. Ịgbakwunye obere microfoam ma ọ bụ plasticizer kwesịrị ekwesị nwere ike ime ka njide mmiri dị na mmiri nke ngwa agha dịkwuo mma. A na-atụle njigide mmiri nke ngwa agha site na mita delamination nke ngwa agha, a na-egosipụtakwa ya site na delamination (. Ọ bụrụ na delamination ahụ dị ukwuu, ọ pụtara na ngwa agha ahụ na-adịkarị mfe delamination na segregation, nke na-adịghị mma na-ewu na ciment hardening. The Delamination ogo nke masonry ngwa agha ekwesịghị ịbụ ihe karịrị 3 0mm Ọ bụrụ na delamination dị oke obere, ihicha shrinkage cracks na-adịkarị mfe ime, ya mere delamination nke ngwa agha ekwesịghị ịbụ ihe na-erughị 1 0mm.

(3) Nhazi oge

A ga-enyocha oge nhazi nke ngwa ngwa ụlọ dabere na nguzogide ntinye ruru 0.5MPa. Ngwa ngwa ciment ekwesịghị ịfe awa 8, na simenti gwakọtara ngwa ngwa ekwesịghị gafere awa 10. Mgbe ịgbakwunye admixture, ọ kwesịrị izute imewe na ihe owuwu chọrọ.

3. Nkà na ụzụ Njirimara nke masonry ngwa agha mgbe hardening

A na-eji ike mkpakọ nke ngwa agha ahụ dị ka ndeksi ike ya. Ụdị ihe atụ ọkọlọtọ bụ 70.7 mm cubic specimens, otu ụdị 6, na omenala ọkọlọtọ ruru ụbọchị 28, na nkezi ike mkpakọ (MPa). A na-ekewa ngwa ngwa masonry gaa n'ọkwa ike isii dịka ike mkpakọ siri dị: M20, M15, M7.5, M5.0, na M2.5. Ike nke ngwa agha na-emetụta ọ bụghị nanị site na nhazi na oke nke ngwa agha ahụ n'onwe ya, kamakwa na-emetụta arụmọrụ absorption nke mmiri nke isi.

Maka ngwa ngwa ciment, enwere ike iji usoro ike ndị a iji tụọ atụmatụ:

(1) Isi ihe na-adịghị amị amị (dị ka nnukwu nkume)

Isi ihe na-adịghị ahụkebe bụ isi ihe na-emetụta ike nke ngwa agha, nke bụ otu ihe ahụ dị ka nke ihe, ya bụ, a na-ekpebi ya site na ciment ike na mmiri-ciment ruru.

(2) Isi ihe na-amị mmiri (dị ka brik ụrọ na ihe ndị ọzọ na-asọ oyi)

Nke a bụ n'ihi na oyi akwa nwere ike ịmị mmiri. Mgbe ọ na-amịkọrọ mmiri, ọnụ ọgụgụ mmiri a na-edobere na ngwa ngwa na-adabere na njide mmiri nke ya, ọ nweghịkwa ihe jikọrọ ya na mmiri-ciment ruru. Ya mere, ike nke ngwa agha n'oge a na-ekpebisi ike site na ike nke ciment na ọnụ ọgụgụ nke ciment.

Ike njide nke ngwa agha masonry

Ngwa ngwa masonry ga-enwerịrị ike njikọta zuru oke iji jikọta masonry n'ime mkpokọta siri ike. Ogo nke ike jikọrọ ọnụ nke ngwa agha ahụ ga-emetụta ike ịkwa ahụ, ịdịte aka, nkwụsi ike na nguzogide vibration nke masonry. Na mkpokọta, ike njikọta na-abawanye site na mmụba nke ike mkpakọ nke ngwa agha ahụ. Njikọ nke ngwa agha na-emetụtakwa ọnọdụ elu, ogo nke mmiri na ọnọdụ ọgwụgwọ nke ihe masonry.


Oge nzipu: Dec-07-2022
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