1. Ọdịnaya isiokwu na oke nke ngwa
Usoro a na-akọwapụta ngwa na usoro ọrụ maka mkpebi siri ike nke ụrọ ciment.
Usoro a dabere na mkpebi siri ike nke ngwa agha simenti mgbawa ugwu ash Portland, simenti Portland mejupụtara, simenti Portland nkịtị agwakọta ya na ntụ mgbawa ugwu, simenti slag Portland na ụdị ciment ndị ọzọ ahapụtara iji usoro a.
2. Ụkpụrụ ntụaka
GB177 Usoro nyocha ike ngwa agha ciment
GB178 aja ọkọlọtọ maka ule ike ciment
JBW 01-1-1 Standard sample maka fluidity nke ciment ngwa agha
3. Usoro nchọpụta nke mbelata mmiri nke ngwa ngwa bụ nke a:
3.1 Ngwa na akụrụngwa
A. Ngwakọta ngwa agha;
B. Tebụl ịwụ elu (a ghaghị ịgbakwunye efere iko 5mm);
C. Cylindrical ramming bar: mere nke metal ihe onwunwe, dayameta 20mm, ogologo banyere 185mm;
D. truncated cone okirikiri ebu na ebu cover: truncated cone okirikiri ebu size, ịdị elu bụ 60 ± 0.5mm, elu dayameta φ 70± 0.5mm, ala dayameta 100 ± 0.5mm, ebu cover ga-dakọtara na truncated cone okirikiri ebu, truncated cone mere ebu na ihe ebu;
E. Onye na-achị (ihe nha nha 300mm) ma ọ bụ calipers nwere nha nha 300mm;
F. spatula.
G. Ntụle ọgwụ (na-atụ 1000g, na-ahụ 1g).
3.2. Usoro ule
3.2.1 Tulee oriri mmiri nke ngwa ngwa ntụaka
A. Were ciment 300g na ájá ọkọlọtọ 750g wee wụsa ha n'ime ite agwakọta, malite mixer, tinye mmiri nwayọọ nwayọọ mgbe agwakọtara maka 5s, tinye ha n'ime 30s. Kwụsị ịkpali maka nkeji 3 ka ịmalitere igwe. Kpochapụ ngwa ngwa ahụ na agụba ma wepụ pan ahụ na-akpali akpali.
B. Na ịgwakọta ngwa agha n'otu oge ahụ, na mmiri ákwà hichapụ jump table table, ramming mkpanaka, bee cone gburugburu ebu na ebu cover n'ime mgbidi, na-etinye ha na etiti nke iko efere, kpuchie na mmiri ákwà.
C. The agwakọta ngwa agha na-ngwa ngwa kewara abụọ n'ígwé n'ime ebu, mbụ oyi akwa arụnyere na cone ebu banyere abụọ n'ụzọ atọ dị elu, na ramming mmanya si nsọtụ ka center evenly tinye ramming iri na ise ugboro, mgbe ahụ kwajuru na nke abụọ oyi akwa nke ngwa agha, arụnyere na ihe dị ka abụọ centimeters elu karịa gburugburu ebu, iri na otu ugboro cylindrif mkpara. Mgbe ị na-etinye ájá na ramming, pịa mkpịsị ugodi ahụ anwụ site n'aka ka ịzena ije.
D. Mgbe emechara, wepụ ihe mkpuchi ahụ, jiri spatula kpochapụ ngwa agha ahụ nke dị elu karịa mkpuru okirikiri cone a kpụrụ akpụ wee hichaa ya dị larịị, wee jiri nwayọọ welie okirikiri okirikiri elu elu. Kwaa aka na crank nke wheel iji mee ka tebụl na-awụli elu na-awụlikwa elu ugboro iri atọ na ọnụ ọgụgụ nke otu sekọnd.
E. Mgbe iti, na-eji calipers tụọ diffusion dayameta nke ngwa agha ala, na-ewere nkezi uru nke abụọ diameters perpendicular ọ bụla ọzọ dị ka diffusion nke ngwa agha mgbe mmiri na-eji, kwuru na mm. Mgbe nrụtụ aka ngwa agha diffusivity bụ 140± 5mm, mmiri oriri bụ mmiri oriri nke ntụaka ngwa agha diffusivity.
3.2.2 Dị ka usoro 3.2.1 si kwuo, oriri mmiri nke ngwa agha na onye na-ebelata mmiri ruru 140 ± 5mm.
3.3. A na-agbakọ ọnụego mbelata mmiri nke ngwa agha a na-agwọ dị ka ndị a:
Ọnụego mbelata mmiri nke ngwa agha (%) = (W0-W1)/ W0 × 100
Ebe, w0 - mmiri oriri (g) mgbe mgbasa nke ntụ ntụ ntụ bụ 140± 5mm;
W1 - oriri mmiri (g) mgbe mgbasa nke ngwa agha na onye na-ebelata mmiri bụ 140 ± 5mm.
Uru nke ọnụego mbelata mmiri bụ ọnụ ahịa pụtara mgbakọ na mwepụ nke ihe nlele atọ.
Oge nzipu: Eprel-25-2024