1.1Kayan kayan abinci
Ciminti yana ɗaukar ciminti na P ⅱ (PC) da Nanjing Onovetl Staoti 0.05%, 0.10%, 0.20%, 0.30%, bi da bi; Kyakkyawan tarin yawa shine dunƙulen ƙwaya tare da girman kashi 0.212 ~ 0.425 mm.
1.2hanyar gwaji
1.2.1Kayan aiki
Amfani da maimaitawa na samfurin JJ-5, Da fari dai Mix HPMC, ciminti da yashi a ko'ina, sannan ana aiwatar da ruwa da mix don ƙarin sauri), kuma ana aiwatar da gwajin aikin nan da nan bayan hadawa.
1.2.2Esarshe kimantawa
Sauye-sauye na turmi ya zama mafi yawan halayen da rudani.
Kyakkyawan ƙonewa shine tushen fahimtar bugu na 3D, da kuma turmi da ake buƙata ya zama santsi kuma ba tare da toshe bututu lokacin aiwatar da fushin ba. Bukatun bayarwa. Magana game da GB / t 2419-2005 "Sakamako na ciminti turta", da 60 da 60 gwajin da aka gwada ta gwajin tebur tebur.
Kyakkyawan cin abinci shine mabuɗin don gano Fitar 3D. Ana buƙatar Layer da aka buga Layer bai rushe ko ƙazantar da mahimmanci a ƙarƙashin nauyinta da matsin lambar babba ba. Tsarin ƙira da tsayayya da haɓakawa a ƙarƙashin nauyinta za'a iya amfani dashi don magance matsalar turɓayar bugun 3D.
Resulturewar sake riƙe da ƙwararrakin ya nuna girman nauyin sa na kayan aikinta a ƙarƙashin nauyinsa na kayan haɗi. A mafi girma da ƙididdigar ƙira, ƙwararrun ƙuguwar turɓaya a ƙarƙashin nauyinsa, wanda ya fi dacewa a buga. Tunani, sanya turmi a cikin silili mold tare da diamita da tsawo na 100 mm, ragrape na babba, da kuma yawan amfani da tsayin riƙe shi ne tsari na riƙe tsari. An yi amfani da hanyar da ke sama don gwada yawan ƙimar ƙura ta turmi bayan tsaye don 0, 20, 40, da 60 minsididdigar bi da bi.
Rashin daidaituwa na turmi na 3D yana da alaƙa kai tsaye ga saiti da kuma wahalar ginin shigar da shigarwar ciminti yayin aiwatar da saiti. Koma zuwa JGJ 70 - 2009 "Hanyar gwaji don ingantaccen aikin ginin turmi" don gwada juriya na shiga ciki.
Bugu da kari, ana amfani da wani firinta na Gantry don fitar da al'amuran a gefe guda-Layer mai kamar yadda adadin buga yadudduka, da nisa daga saman baki, kuma an gwada girman gefen. Bugawa kauri na kauri shine 8 mm, kuma saurin motsi shine 1 500 mm / min.
1.2.3Gwajin mallakar rheological
Tsarin rheoleteri yana da mahimmancin kimantawa don rarrabe ɓarna da kuma aiki na slurry, wanda za'a iya amfani dashi don hango ƙiyayya na ciminti na 3D Slurry. A bayyane dankanin kwayar halitta yana nuna gogayya tsakanin barbashi a cikin slurry kuma yana iya kimanta juriya na slurry da nakasa. Ikon HPMC don nuna tasirin HPMC akan qushe turɓayar buga 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. Tsarin yanayin gwajin zazzabi ne (20 ± 2) ° C. Tsarkakakken slurry shine pre-sheared for 10 s da slurry a hankali rarraba shi a hankali, sannan kuma an dakatar da adadin karawa daga 0.1 S-1 zuwa 60.3.
Tsarin Bingham wanda aka nuna a cikin Eq. (1) Ana amfani da shi don dacewa da daidaitawa mai wahala-karfi a cikin tsayayyen mataki (Shear kudi shine 10.0 ~ 50..0 s-1).
τ = τ0 + μγ (1).
inda τ shine tsananin damuwa; τ0 shi ne matsanancin rashin ƙarfi; μ shine danko na filastik; γ shine karancin karfi.
Lokacin da kayan tushen ciminti suna cikin yanayin magana, da danko filastik μ yana wakiltar digiri na wahala na gazawar tsarin na Colloidal, da kuma yawan damuwa τ0 yana nufin ƙaramar damuwa da ake buƙata don slurry don gudana. The abu kawai yana gudana lokacin da kuma garkuwar zuciya ya fi girma, saboda haka ana iya amfani dashi don nuna tasirin HPMC a kan turɓayar bugun 3d na 3D.
1.2.4Gwajin kayan inji
Magana game da GB / T 17671-19999 "Hanyar gwaji don ƙarfin turmi na ciminti", an gwada ƙarfin ramin HPMC tare da ƙarfin rakiyar 2, da kuma ƙarfin raye-raye da ƙarfi da ƙarfi da ƙarfi da ƙarfi.
Babu wani misali da ya dace don hanyar gwajin ta ƙarfin haɗin tsakanin yadudduka na 3D buga takardu. A cikin wannan binciken, an yi amfani da hanyar rarrabuwa don gwajin. An warkar da samfurin komp na 3D na 3D na 3D ya warke sau 28 na biyu, sannan a yanka a cikin sassa 3, wanda aka sanya wa A, B, C bi da bi. , kamar yadda aka nuna a hoto 2 (a). Hanyar gwaji na CMT-4204 (kewayon 20 kn, ƙima na 0.08 mm / kantin ɓangaren uku don tsayar da gazawa ta daina, kamar yadda aka nuna a cikin Hoto na 2 (b).
The Interlamarar Bond PB na samfurin an lasafta bisa ga wannan tsari:
Pb = 2f to = 0.637 fa (2)
inda f shine gazawar nauyin samfuran; A ne fannin tsagewa ne na samfuran.
1.2.5Micromorphology
An lura da ilimin halittar microscopic na samfurori a 3 d an lura da kayan lantarki 200 tare da Microscope na UPRA (SEM) daga kamfanin fei, Amurka.
Lokaci: Sat-27-2022