1.1ngwaọrụ
Cent na-eme ihe PCT 52.5 ciment na-emepụta site na Osisi Ometian Hototian, ọmịiko bụ 6.5, Vent Accity (2) 0.10%, 0.20%, 0.30%, n'otu n'otu; Ezi nchịkọta bụ ájá quartz nke nwere urughuru nke 0.212 ~ 0.425 mm.
1.2usoro nnwale
1.2.1Nkwadebe nke ihe
Iji igwekota nke ihe nlereanya JJ-5, nke mbụ jikọta HPMC, ciment na obere ọsọ na 1 min na ọsọ ọsọ), na nnwale arụmọrụ ahụ ozugbo agwakọta.
1.2.2Nnyocha arụmọrụ
Nkwaga ahụ nke ngwa agha bụ nke e ji amamịghe na azọrọ.
Ezi uche bụ ihe ndabere maka ịmata mbipụta 3D, a chọrọ ka ịgba agha ahụ dị larịị ma ghara igbochi ọkpọkọ n'oge usoro a na-apụ. Nyere ihe achọrọ. Na-ezo aka na GB / T 2419-2005 "Mkpebi nke ọkụ na-eme ka ngwa agha", 20, 20, 40, na ule tebụl na-ama jijiji.
Ezigbo ajị bụ isi ihe iji mata mbipụta 3D. Achọrọ ya na akwa nke e biri ebi anaghị akụ ma ọ bụ na-adịghị mma n'okpuru ịdị arọ nke ya na nrụgide nke elu oyi akwa. Enwere ike iji ụdị njigide njigide na eriri afọ n'okpuru ya nwere ike iji ya mee ihe eji eme ihe mgbochi nke mgbanyụ akwụkwọ 3D.
Ihe eji emegide di n'okpuru ya dika ibu nke nhichapu nke ihe di n'okpuru ya ibu ya, nke enwere ike iji tulee ihe mgbochi nke ihe ato. Ihe dị elu ọdịbendị udi, na-pere mpe nke ngwa agha n'okpuru ya, nke na-adọrọ mmasị ibipụta. Ntụziaka, gbanye ngwa agha a na-ebugharị cylindrical ebu na dayameta na ịdị elu nke 100 mm, wee bulie elu elu, wee bulie elu ya na elu mbụ ahụ bụ njigide njikọta. Ejiri usoro dị n'elu iji nwalee ụdị njikọta nke ngwa agha nke agba mgbe 20, 20, 40, na 60 min.
A na-eji ihe mgbochi nke ịgba agha 3D metụtara ya na usoro na usoro mgbochi nke ihe ahụ n'onwe ya iji nweta ciment na-eme ihe dị iche iche na-eme ihe n'oge nrụpụta, ka ọ na-egosipụta nke ọma. Rụgharịa aka na JGJ 70 - 2009 "usoro nnwale maka arụmọrụ ụlọ" iji nwalee ọnya afọ.
Na mgbakwunye, a na-eji gantry akpọpụta onye na-ebipụta akwụkwọ iji mepụta ma bipụta ndepụta nke otu cube nke 200 mm, obosara nke oke onu, obosara nke ala na-anwale. Ọgwụgwụ oyi akwa bụ 8 mm, na ngwa nbipute ije bụ 1 500 mm / min.
1.2.3Nnwale nke Rheological
Pameological parameter bụ oke nyocha dị mkpa iji mara nrụrụ na ọrụ ike nke slurry, nke enwere ike iji buo omume na-ebu ụzọ nke atọ na-ebi akwụkwọ. Ihe a pụtara ìhè na-egosi esemokwu nke ime n'etiti irighiri ihe na slurry ma nwee ike ịtụle ngọngọ nke slurry na-agagharị na-asọgharị. Ike nke HPMC iji gosipụta mmetụta HPMC na mbido mbipụta 3D. Refer to the mixing ratio in Table 2 to prepare cement paste P-H0, P-H0.10, P-H0.20, P-H0.30, Use a Brookfield DVNEXT viscometer with an adapter to test its rheological properties. Ọnọdụ ọnọdụ udo bụ (20 ± 2) Celsius C. Ihe dị ọcha na-adịkarị mma maka 10 s na 60.0 S-1 iji mee ka ọ bụrụ ihe na-aba ụba, wee kwụsịtụ ọnụego ya na-abawanye site na 0.1 na 1 wee belata na 0.1 na 1.
Ihe nlere Bingham gosipụtara na Eq. (1) A na - eji ya na - eji nwayọọ nwayọọ na - eme mkpọtụ na - azọ mmiri na-azọcha na steepụ stable (ọnụego shiee bụ 10.0 ~ 50.0 S-1).
τ = τ0 + μγ (1).
Ebee ka a na-emegharị ahụ; τ0 bụ ihe na-akpata nchegbu; bụ vistic plastity; Γ bụ ọnụego ya.
Mgbe ihe ndị sitere na ciment dị na steeti ciment, vistic Vircosity μ na-anọchi anya ogo nke ọdịda nke colloidal, na-emesi ike na oke nrụgide achọrọ maka slurry na-agba. Ihe ọ na-eme naanị mgbe a na-awụda mmiri dị elu karịa τ0 pụtara, yabụ enwere ike iji ya gosipụta mmetụta nke Hpmc na mgbatị nke mgbanyụ nke atọ.
1.2.4Ule nke eji eme ihe
Na-ezo aka na GB / T 17671-1999 "Usoro nnwale maka ike cent", ụdị ngwa agha ahụ dị iche iche dị na tebụl 2, a nwalere ihe oriri na ume ụbọchị 28 ha.
Enweghị ụkpụrụ dị mkpa maka usoro nnwale nke ike nke na-enweghị njikọ n'etiti akwa nke ịgba ngwa agha nke atọ. N'ime ọmụmụ ihe a, emere usoro na-ewuli elu maka ule ahụ. A gwọrọ Hightụ ọgwụ mgbapụta 3D maka 28 d, wee bee n'ime akụkụ atọ, aha ya bụ, b, c ka. , dị ka egosiri na eserese 2 (a). Ejiri igwe nnwale nke cmt-4204.
A na-agbakọ eriri njikọ nke CB nke ọdịdị dị ka usoro usoro a:
PB = 2fπa = 0.637 fa (2)
ebe f bụ ibu ọdịda nke ụdị ahụ; A bụ mpaghara nke oghere a na-adọwa.
1.2.5Micromorphology
Milkphology nke ụdị na 3 d na scrannickon microncia micron (sai.
Oge Post: Sepp-27-2022