Ƙarfe fiber ƙarfafa kankare (SFRC) wani sabon nau'i ne na haɗe-haɗe abu wanda za a iya zuba da kuma fesa ta ƙara daidai adadin short karfe fiber zuwa talakawa kankare.Ya bunkasa cikin sauri a gida da waje a cikin 'yan shekarun nan.Yana shawo kan gazawar ƙarancin ƙarfin ƙarfi, ƙaramin ƙaranci na ƙarshe da kuma ɓarna dukiya na kankare.Yana da kyawawan kaddarorin irin su ƙarfin ƙarfi, juriya mai lanƙwasa, juriya mai ƙarfi, juriya mai tsauri, juriya ga gajiya da ƙarfi mai ƙarfi.An yi amfani da shi a aikin injiniya na ruwa, hanya da gada, gine-gine da sauran fannonin injiniya.
1. Haɓaka simintin ƙarfe na ƙarfe mai ƙarfi
Fiber ƙarfafa kankare (FRC) shine taƙaitaccen simintin ƙarfafa fiber.Yawanci hadadden siminti ne wanda ya hada da man siminti, turmi ko siminti da fiber na karfe, fiber inorganic fiber ko kayan karfafa fiber na halitta.Yana da wani sabon gini abu kafa ta uniformly dispersing gajere da lafiya zaruruwa tare da high tensile ƙarfi, high matuƙar elongation da high alkali juriya a cikin kankare matrix.Fiber a cikin kankare na iya iyakance haɓakar fashewar farko a cikin siminti da ƙarin haɓaka fasa a ƙarƙashin aikin ƙarfi na waje, yadda ya kamata shawo kan lahani na asali kamar ƙarancin ƙarfi mai ƙarfi, fashewar sauƙi da ƙarancin gajiya juriya na kankare, kuma yana haɓaka aikin sosai. na impermeability, hana ruwa, juriya sanyi da kuma ƙarfafa kariya na kankare.Ƙarfafan simintin Fiber, musamman maƙarar zaren ƙarfe na ƙarfe, ya fi jawo hankali sosai a cikin da'irar ilimi da injiniyanci a aikin injiniya na aiki saboda ƙwarewarsa.1907 Masanin Soviet B П.Hekpocab ya fara amfani da simintin ƙarfe na fiber ƙarfafa;A cikin 1910, HF Porter ya buga wani rahoto na bincike game da gajeren fiber ƙarfafa siminti, yana nuna cewa gajerun zaruruwan ƙarfe ya kamata a tarwatsa su daidai gwargwado a cikin kankare don ƙarfafa kayan matrix;A shekara ta 1911, Graham na Amurka ya ƙara ƙarfe na fiber zuwa siminti na yau da kullun don inganta ƙarfi da kwanciyar hankali na siminti;A cikin shekarun 1940, Amurka, Birtaniya, Faransa, Jamus, Japan da sauran ƙasashe sun yi bincike da yawa kan amfani da fiber na karfe don inganta juriya da tsagewar siminti, fasahar kera kayan simintin ƙarfe na ƙarfe, da inganta haɓakar simintin ƙarfe. siffar karfe na fiber don inganta ƙarfin haɗin kai tsakanin fiber da matrix matrix;A shekara ta 1963, JP romualdi da GB Batson sun buga takarda kan tsarin ci gaba da fasa bututun ƙarfe na simintin ƙarfe, kuma sun gabatar da ƙaddamar da cewa ƙarfin ƙarfin fiber ɗin da aka ƙarfafa simintin yana ƙayyade ta matsakaicin tazara na zaruruwan ƙarfe waɗanda ke taka rawar gani sosai. a cikin damuwa mai ƙarfi (ka'idar tazarar fiber), don haka fara matakin haɓaka mai amfani na wannan sabon kayan haɗin gwiwa.Ya zuwa yanzu, tare da yaɗawa da aikace-aikacen simintin ƙarfe na ƙarfe na ƙarfe, saboda nau'ikan zaruruwa daban-daban a cikin siminti, galibi ana samun nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan ma'auni ma'auni ne: ƙarfe na ƙarfe na ƙarfe na ƙarfe, simintin ƙarfe na ƙarfe, fiber na ƙarfe na ƙarfe, fiber na ƙarfe na ƙarfe da fiber hybrid. ƙarfafa kankare.
2. Ƙarfafa tsarin ƙarfin ƙarfe na ƙarfe da aka ƙarfafa kankare
(1)Hanyoyin ka'idar makanikai.Ka'idar makanikai masu haɗaka sun dogara ne akan ka'idar ci gaba da haɗaɗɗun fiber kuma an haɗa su tare da halayen rarraba kayan ƙarfe na ƙarfe a cikin kankare.A cikin wannan ka'idar, ana ɗaukar bukukuwan azaman kayan aiki biyu tare da fiber a matsayin lokaci ɗaya da matrix a matsayin sauran lokaci.
(2)Ka'idar tazarar fiber.Ka'idar tazarar fiber, wanda kuma aka sani da ka'idar juriya, an gabatar da shi bisa injinan karaya na layi.Wannan ka'idar tana ɗaukar cewa tasirin ƙarfafa zaruruwa yana da alaƙa kawai da tazarar fiber ɗin da aka rarraba iri ɗaya (mafi ƙarancin tazara).
3. Bincike game da matsayin ci gaba na karfe fiber ƙarfafa kankare
1.Steel fiber ƙarfafa kankare.Ƙarfe fiber ƙarfafa kankare wani nau'i ne na in mun gwada da uniform da Multi-directional ƙarfafa kankare kafa ta ƙara wani karamin adadin low carbon karfe, bakin karfe da FRP zaruruwa cikin talakawa kankare.A hadawa adadin karfe fiber ne kullum 1% ~ 2% by girma, yayin da 70 ~ 100kg karfe fiber ne gauraye a kowace cubic mita na kankare da nauyi.Tsawon fiber na karfe ya kamata ya zama 25 ~ 60mm, diamita ya zama 0.25 ~ 1.25mm, kuma mafi kyawun rabo na tsawon zuwa diamita ya kamata ya zama 50 ~ 700. Idan aka kwatanta da kankare na yau da kullum, ba zai iya inganta haɓaka ba kawai, karfi, lankwasawa. , lalacewa da tsagewar juriya, amma kuma yana haɓaka haɓakar ƙaƙƙarfan ƙarfi da juriya na siminti, kuma yana haɓaka juriya na gajiya da tsayin daka na tsari, musamman ma ana iya ƙara ƙarfi ta 10 ~ 20 sau.The inji Properties na karfe fiber ƙarfafa kankare da talakawa kankare aka kwatanta a kasar Sin.Lokacin da abun ciki na fiber karfe shine 15% ~ 20% kuma rabon ciminti na ruwa shine 0.45, ƙarfin ƙarfi yana ƙaruwa da 50% ~ 70%, ƙarfin flexural yana ƙaruwa da 120% ~ 180%, ƙarfin tasiri yana ƙaruwa da 10 ~ 20 sau, tasirin ƙarfin gajiya yana ƙaruwa da sau 15 ~ 20, ƙarfin sassauci yana ƙaruwa sau 14 ~ 20, kuma juriya na lalacewa shima yana inganta sosai.Saboda haka, karfe fiber ƙarfafa kankare yana da mafi kyau na jiki da inji Properties fiye da bayyana kankare.
4. Hybrid fiber kankare
Bayanan bincike masu dacewa sun nuna cewa fiber na karfe ba ya inganta ƙarfin damtse na kankare, ko ma rage shi;Idan aka kwatanta da kankare a fili, akwai tabbatacce da korau (ƙara da raguwa) ko ma matsakaicin ra'ayi game da rashin daidaituwa, juriya, tasiri da lalacewa juriya na fiber ƙarfe da aka ƙarfafa siminti da rigakafin farkon ƙwayar filastik na kankare.Bugu da kari, simintin ƙarfe na ƙarfe na ƙarfe yana da wasu matsaloli, kamar babban sashi, farashi mai tsada, tsatsa da kusan rashin juriya ga fashewa da gobara ke haifarwa, wanda ya shafi aikace-aikacen sa zuwa matakai daban-daban.A cikin 'yan shekarun nan, wasu malamai na cikin gida da na waje sun fara kula da kankare fiber kankare (HFRC), suna ƙoƙarin haɗa fibers tare da kaddarorin daban-daban da fa'idodi, koya daga juna, kuma suna ba da wasa ga "tasirin hybrid mai kyau" a matakai daban-daban loading matakai don bunkasa daban-daban Properties na kankare, don saduwa da bukatun daban-daban ayyuka.Duk da haka, game da nau'ikan kayan aikin injiniya daban-daban, musamman nakasar gajiya da lalacewar gajiya, ƙa'idodin haɓaka haɓakawa da halayen lalacewa a ƙarƙashin madaidaicin nauyin nauyi da tsayin daka ko madaidaicin girman cyclic lodi, mafi kyawun haɗuwa da adadin fiber, alaƙar. tsakanin sassa na hada kayan, ƙarfafa sakamako da kuma ƙarfafa inji, anti gajiya yi, gazawar inji da ginin fasaha, Matsalolin Mix rabo zane bukatar da za a kara nazari.
5. Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarƙashin Ƙarfafa Ƙarfafa
Monolithic fiber ƙarfafa kankare ba sauki don haɗuwa daidai ba, fiber yana da sauƙin haɓakawa, adadin fiber yana da girma, kuma farashin yana da girma, wanda ke shafar aikace-aikacensa mai fa'ida.Ta hanyar babban adadin aikin injiniya da bincike na ka'idar, sabon nau'in tsarin fiber karfe, Layer karfe fiber ƙarfafa kankare (LSFRC), an ba da shawarar.Ana rarraba ɗan ƙaramin zaren ƙarfe daidai gwargwado akan saman sama da na ƙasa na shingen titin, kuma tsakiyar har yanzu wani simintin siminti ne.Fiber ɗin ƙarfe a cikin LSFRC gabaɗaya ana rarraba shi da hannu ko ta inji.Fiber na karfe yana da tsayi, kuma girman diamita na tsawon shine gabaɗaya tsakanin 70 ~ 120, yana nuna rarraba nau'i biyu.Ba tare da rinjayar kayan aikin injiniya ba, wannan abu ba kawai yana rage yawan adadin fiber na karfe ba, amma kuma yana guje wa abin da ke faruwa na fiber agglomeration a cikin haɗakar da fiber mai mahimmanci.Bugu da ƙari, matsayi na Layer fiber Layer a cikin kankare yana da tasiri mai girma akan ƙarfin sassauƙa na kankare.Tasirin ƙarfafawa na Layer fiber Layer a kasan kankare shine mafi kyau.Tare da matsayi na Layer fiber Layer yana motsawa sama, tasirin ƙarfafawa yana raguwa sosai.Ƙarfin sassauƙa na LSFRC ya fi sama da 35% sama da na siminti na fili mai ma'ana iri ɗaya, wanda ya ɗan yi ƙasa da na simintin ƙarfe na ƙarfe na ƙarfe.Koyaya, LSFRC na iya adana tsadar kayan abu da yawa, kuma babu matsala na wahalar haɗawa.Saboda haka, LSFRC wani sabon abu ne tare da fa'idodin zamantakewa da tattalin arziƙi da fa'idar aikace-aikacen fa'ida, wanda ya cancanci yaɗawa da aikace-aikace a cikin ginin pavement.
6. Layered hybrid fiber kankare
Layer matasan fiber ƙarfafa kankare (LHFRC) wani abu ne mai haɗaka da aka kafa ta hanyar ƙara 0.1% polypropylene fiber a kan LSFRC kuma a ko'ina rarraba babban adadin lafiya da gajere zaruruwan polypropylene tare da ƙarfin ƙarfi mai ƙarfi da haɓakar ƙarshe a cikin babba da ƙananan ƙarfe. fiber kankare da kuma farantin kankare a tsakiyar Layer.Yana iya shawo kan raunin LSFRC tsaka-tsakin simintin siminti da kuma hana haɗarin aminci bayan filayen fiber na ƙarfe ya ƙare.LHFRC na iya haɓaka ƙarfin sassauƙa na kankare sosai.Idan aka kwatanta da siminti na fili, ƙarfin sassauƙansa na siminti na fili yana ƙaruwa da kusan kashi 20%, kuma idan aka kwatanta da LSFRC, ƙarfin sassauƙansa yana ƙaruwa da kashi 2.6%, amma yana da ɗan tasiri a kan ƙwanƙwasa na roba.Module na roba mai sassauƙa na LHFRC yana da 1.3% sama da na siminti na fili kuma 0.3% ƙasa da na LSFRC.Hakanan LHFRC na iya haɓaka taurin siminti sosai, kuma ma'aunin taurin sa ya kai kusan sau 8 na siminti da kuma sau 1.3 na LSFRC.Haka kuma, saboda daban-daban yi na biyu ko fiye zaruruwa a cikin LHFRC a kankare, bisa ga aikin injiniya bukatun, da m matasan tasirin roba fiber da karfe fiber a cikin kankare za a iya amfani da ƙwarai inganta ductility, karko, tauri, crack ƙarfi. , Ƙarfin ƙwanƙwasa da ƙarfi na kayan aiki, inganta ingancin kayan aiki da kuma tsawaita rayuwar sabis na kayan.
—— Abstract (Tsarin gine-ginen Shanxi, Vol. 38, No. 11, Chen Huiqing)
Lokacin aikawa: Agusta-24-2022