Fiber Karfe a cikin Kankare Precast: Rushewa, ɗagawa da Ganuwar Sirara

Labari

Yuni 15, 2015

Tsire-tsire da aka riga aka yi ba ya son ƙarfin mafi girma, yana so ya cire mold a yau. Ƙuntatawa uku, lokacin ƙaddamarwa, wuraren ɗagawa da kauri na bango, yanke shawarar fiber.

Abin da Shuka Precast ke so shine ya tsige a yau

Shafukan da aka jefa a wurin suna kula da ƙarfin ƙarshe; precast shuke-shuke kula game da canji. Tsiri ɗaya a kowace rana tare da ɗaya a kowane kwana biyu yana ninka ƙarfin aiki kuma yana canza yadda raguwar tsirrai da aiki ke sha. Dalilin farko na fiber na karfe a cikin precast shine yawanci juriya ta farko maimakon ƙarfin ƙarshe, don haka za'a iya ɗaga wani abu, juya shi kuma a cire shi yayin da simintin yana matashi ba tare da spalling a sasanninta ba. Wannan kuma ya bayyana dalilin da ya sa tsire-tsire da aka riga aka rigaya sun fi kula da tarwatsewa fiye da ƙarfin juzu'i: ƙwallon fiber ɗaya na iya ɗaukar kusurwar wani yanki yayin tsiri.

Ƙarfin Farko da Lokacin Ficewa

Lokacin cirewa yana biye da ƙarfin farko, yawanci 50% zuwa 70% na ƙira. Fiber ɗin ƙarfe ba ya haɓaka ƙarfin damtse da wuri, wanda shine siminti da warkewa, amma yana haɓaka ƙarfin ƙarfi da wuri, wanda shine juriya ga rashin tsagewa ko guntuwa a tsiri. A aikace, za a iya cire wani abu mai nauyin 30 zuwa 40 kg/m3 na fiber na tsawon sa'o'i hudu zuwa takwas a baya a karkashin wannan magani, ko kuma za'a iya cire shi a rana guda tare da ƙananan lalacewar kusurwa. Don bakin ciki ganuwar bambanci ya fi girma har yanzu.

Wuraren ɗagawa: Fiber baya maye gurbin madaukai masu ɗagawa

Rashin fahimta mai haɗari shine cewa fiber na ƙarfe yana cire buƙatar ɗaukar madaukai. Ɗagawa yana amfani da ƙarfin da aka tattara, kuma simintin da ke kusa da wurin yana cikin ɗaukar gida da bugun tsiya. Fiber yana inganta taurin naushi amma ba zai iya maye gurbin madaukai da aka jefa ko ramukan ɗagawa ba. Ajiye wuraren ɗagawa, kuma ƙara yawan fiber a cikin gida ko ƙara raga a kusa da su. Daya daki-daki yana canzawa: filin dagawa danniya a cikin fiber kankare ya fi uniform, don haka maki na iya zama dan kadan gaba fiye da a fili, amma bayan dubawa, ba ta ido ba.

Katangar bakin ciki: 0.12-0.3 mm Micro Wire ne kawai ke da hankali

A ƙasa game da kauri na bango na 60 mm, fiber na ƙarfe na yau da kullun kawai bai dace ba. Fiber 50 mm a cikin bangon 40 mm ya mamaye dukkan sashin, ba ya samar da hanyar sadarwa mai girma uku, kuma ana tura shi zuwa saman yayin girgiza. Wannan shi ne inda ƙananan ƙananan waya ke aiki: 0.12 zuwa 0.3 mm diamita, 6 zuwa 20 mm tsayi, 2000 zuwa 2850 MPa ƙarfi. Micro waya yana samar da babbar hanyar sadarwa a cikin sashe na bakin ciki, yana haɓaka juriya ba tare da cutar da daidaito ba. Abubuwan kayan ado, sunshades da ɓangarorin UHPC na bakin ciki duk suna nan.

Abubuwan da aka liƙa: Inda Riba 40% Ya Fito Daga

Zazzage fiber yana shiga mahaɗar a cikin kullu kuma ya dogara da mahaɗin don raba su; abin da bai rabu ba ya zama ball. Fiber manne yana haɗawa cikin jere tare da tsawonsa tare da manne mai narkewar ruwa. Ana ciyar da layin a matsayin raka'a, manne yana narkewa a cikin dakika 30 zuwa 60, kuma kowane fiber yana rabuwa daban-daban. Daidaitaccen daidaiton da aka auna ya fi 40% kyau fiye da zaren fiber maras kyau kuma adadin ƙwallo yana faɗuwa sosai. Yana da ɗan ƙara kaɗan akan kowace tonne, amma akan bangon bakin ciki, babban sashi da simintin fuska mai kyau wanda ƙima ya yi ƙasa da farashin kwamitin da aka ƙi.

UHPC da RPC: Me yasa Ana Haɗuwa Nau'in Fiber Biyu

Matrices masu girman gaske suna da yawa sosai, tare da jimillar ƴan milimita kaɗan da ƙarancin ƙarfi. A cikin wannan matrix karfe fiber na samar da bayan fashe gada, yayin da filastik shrinkage fatattaka ya faru a baya kuma yana bukatar mafi kyau fiber. Don haka UHPC takan haɗa ƙarfe da fiber na roba: ƙarfe a 1% zuwa 3% ta ƙarar ɗaukar nauyi, roba a 1% zuwa 3% don sarrafa raguwar farkon da kuma rage fashewar fashewa a babban zafin jiki. Fiber roba yana da yawa na kawai 1.41 g/cm3, baya ƙara nauyi ga kashi, kuma a 99% juriya na alkali ya tsaya tsayin daka a cikin matrix siminti mai ƙarfi na alkaline.

Moulds, Sakin Agents da Tushen Magani: Asara Boye Uku a cikin Precast

Rayuwar ƙwayar cuta akan fiber precast na ƙarfe yana tafiyar da kashi talatin zuwa hamsin cikin 100 ya fi guntu fiye da kan kankare a fili, saboda wani dalili mai sauƙi: zaruruwa suna goge bangon ƙirƙira yayin rawar jiki da dimuwa, kuma wayar da aka haɗa tana aiki kamar ƙananan barbs. Matakan uku sun ƙunshi lalacewa. Na farko, kada ku yi tattalin arziki akan daftarin, aƙalla 1 cikin 20 don sassa mai zurfi da 1 cikin 15 don bangon bakin ciki. Na biyu, a zabi mai samar da fim maimakon mai, saboda fim yana kiyaye shinge mai tsayi tsakanin bango da manna yayin da ake goge mai a daidai inda fiber ya matse shi. Na uku, canza zuwa babban mitar ƙaramar girgizawar ƙarar girma kuma kiyaye poker aƙalla 50 mm daga fuskar ƙirar don haka zaruruwa kar su mai da hankali a wurin. Rumbun fiber mai manne yana ƙara takamaiman fa'ida anan: yin allura a cikin daure yana hana tangling a matakin sanyawa, yana haɓaka daidaituwar rarrabawa da kusan kashi 40, kuma yana cire nauyin gida akan mold. Maganin tururi yana buƙatar horon zafin jiki, baya sauri sama da digiri 20 ma'aunin celcius a cikin sa'a akan tudu, riƙe ƙasa da ma'aunin Celsius 60, da raguwar jinkirin daidai. Sassan ɓangarorin sama da na bakin ciki suna haɓaka fashe fashe masu kyau waɗanda ke daidai a ƙarshen fiber, wanda ke biyan aji ɗaya na rashin ƙarfi. Za'a iya kawowa gaba, amma ɗagawa ba zai iya ba: fiber yana inganta halayen sassauƙa da tauri, ba ƙarfin matsawa da wuri ba, don haka ɗaga madaukai da wuraren ɗagawa duk tsayawa. Ga precast kankare karfe fiber maroki, da amfani tambaya ba farashin kowace tonne amma demoulding lokacin da za su tabbatar da a rubuce don ka sashe kauri, saboda cewa lambar ya kafa mold count sabili da haka dukan samar da shirin.

Jerin Siyan Tsirrai na Precast

Siyan precast ya fi dalla-dalla fiye da siyan rukunin yanar gizo: kaurin bango da mafi ƙarancin tazara, buƙatun lokacin buƙatu, ko fuskar tana da fuska, ko ana amfani da maganin tururi, da kuma EN 14889-1 ana buƙatar fitarwa. Maganin tururi shine abin da aka fi rasawa akai-akai: sama da 60 C ana shafar kwanciyar hankali na murfin jan karfe, kuma fiber mara nauyi yakamata ya ɗauki fifiko. Don dacewa da maki da adadin shawarar da aka ba da shawarar ta nau'in kashi, ɓangaren precast na shafin samfurin fiber fiber na ƙarfe ya lissafa ƙayyadaddun ƙayyadaddun bayanai, gami da diamita da tsayin jeri don maki manne da bakin ƙaramin waya.