An samar da sabon nau'in siminti da aka fesa ta hanyar yin amfani da ɗimbin yawa da siminti tare da ƙari na musamman don haɓaka taurin simintin a Turai.
Wanda aka sani da "shotcrete" ya sami karuwar aikace-aikacen a matsayin hanyar tallafawa ƙasa don tono ƙasa a cikin Turai da Arewacin Amurka.
Amfani da shi a cikin ma'adinan karkashin kasa ya kasance gwaji ne.An gano cewa za a iya amfani da shi azaman madadin ƙarin hanyoyin tallafi na ƙasa a ƙarƙashin yanayin ƙasa na yau da kullun amma a ƙarƙashin yanayi mara kyau, irin su talc schist da yanayin rigar sosai, ba zai yiwu a yi amfani da shi cikin nasara ba.
Ana sa ran yin amfani da shotcrete a matsayin hanyar tallafawa ƙasa a cikin ma'adanai na ƙarƙashin ƙasa.Siminti da aka fesa tare da nau'ikan abubuwan ƙari na filastik yana gudana wanda zai iya ƙara iya yin amfani da shi.Fesa kankare mai alaƙa da ragamar waya ya riga ya sami ƙarin aikace-aikace a cikin tonowar ƙasa.
Aikace-aikacen Shotcrete
Akwai hanyoyi guda biyu na hadawa m-aggregate shotcrete, wato rigar-mix da bushe-mix ya shafi hadawa da dukan kankare abubuwan da ruwa da kuma yin famfo da lokacin farin ciki cakuda ta hanyar bayarwa tiyo zuwa bututun ƙarfe, inda ƙarin iska da aka kara da kuma Ana fesa kayan a saman batun.Tsarin bushe-xix yana ba da damar gabatarwar sauƙi na masu haɓakawa gabaɗaya abubuwan haɗaɗɗun ruwa mai narkewa, don haka yana haɓaka tsarin hydration.An ƙirƙira na'urori masu sauri waɗanda ke ba da damar simintin mannewa saman dutsen da kuma saita ƙarƙashin ruwa mai nauyi.
Har yanzu ba a samar da injunan rigar-mix zuwa matakin da a zahiri za su iya sarrafa jimlolin da suka fi girma fiye da 3/4 inci. Irin waɗannan injinan ana amfani da su ne don daidaitawa ta ƙasa maimakon tallafi a ƙasa mara kyau.Amachine na wannan nau'in shine na gaske Gun-All Model H, wanda kamfanin kayan aikin hakar ma'adinai ke rarrabawa, wanda kuma yana da amfani da yawa don aikace-aikacen karkashin kasa inda bakin bakin ciki na siminti har zuwa 2in.lokacin farin ciki da samun jimlar kusan 1/2 in. ana buƙatar matsakaicin girman don yanayin bushewa.
Ayyukan Taimakawa na Shortcrete
Ana iya amfani da Shotcrete ko dai azaman tsari ko azaman tallafi mara tsari.Rarraunan duwatsun filastik da ƙasa mara daidaituwa suna buƙatar aikace-aikacen tsayayyen tsari, ingantaccen tsari don hana ƙasa daga sassautawa da gudana cikin buɗewa.Ana iya samun wannan ta hanyar amfani da inci 4 ko fiye na shotcrete.
A cikin mafi ƙwararrun duwatsu, ana iya amfani da shi don haɗin gwiwa da karaya don hana ƙananan motsin duwatsu waɗanda ke haifar da matsin lamba da gazawa.Ana amfani da harbin mai kauri 2 zuwa 4 inci mai kauri akan tsaunin duwatsu don cike tsatsa da ramuka don ƙirƙirar ƙasa kusan lebur da kuma kawar da tasirin ƙira, aikace-aikacen bakin ciki kawai ake buƙata akan filaye masu santsi.A wannan yanayin, matrix ɗin siminti ɗin da aka haɗa kusan yana aiki azaman manne don riƙe maɓallai da ƙugiya waɗanda ke goyan bayan manyan guntun dutsen kuma a ƙarshe madaidaicin rami.Irin wannan nau'in aikace-aikacen ya zama ruwan dare a Sweden, inda ƙirar tallafin rami bisa shotcrete ya shahara sosai saboda ingancinsa da ƙarancin farashi.
Hakanan za'a iya amfani da harbin a kan siffa mai sirara don kare sabbin saman dutsen da aka hako daga hari da tabarbarewar iska da ruwa.A cikin wannan nau'i, yana da ci gaba da memebrane mai sassauƙa wanda matsa lamba na yanayi zai iya aiki azaman tallafi.
Kwatanta Gunite da Shotcrete
M-aggregate shotcrete ya bambanta da irin wannan gauraye da kuma shafa gunite a cikin cewa shotcrete gaskiya ce da kankare mai dauke da coare (har zuwa 1.25 in) dutse a cikin jimlarsa, yayin da gunite yawanci turmi yashi ne.Shotcrete ya bambanta da gunite a aikace-aikace da aiki ta hanyoyi masu zuwa:
1) The gunite oyan samar da bakin ciki murfin dutse, amma shotcrete idan amfani nan da nan bayan ayukan iska mai ƙarfi zai ba da hatimi da goyon baya don daidaita sabon dutsen.Ana tsammanin haɗin gwiwa mai ƙarfi mai ƙarfi na harbin dutsen ne saboda aikin abubuwan haɓaka haɓakawa na musamman waɗanda ba sa ƙyale simintin ya yi nisa daga saman dutsen tasirin peening na manyan ɓangarorin tara a kan ɓangarorin finer da ƙirar ƙirar ƙira. shortcreting inji amfani.
2) Shotcrete yana amfani da babban (har zuwa 1.25 in) jimla wanda za'a iya haɗe shi da siminti da yashi a cikin abubuwan da ke cikinsa ba tare da bushewa mai tsada da ake buƙata tare da gunite ba.Hakanan za'a iya shafa shi cikin kauri har zuwa inci 6 a cikin wucewa ɗaya, yayin da gunite dole ne ya iyakance ga kauri wanda bai wuce inch 1 ba.Don haka harbin da sauri ya zama mai ƙarfi mai ƙarfi da kuma mai tabbatar da ƙasa mara kyau.
3) Accelerating admixtures amfani da shotcreting taimakon shi a cimma bond tare da dutsen, ko da yake shotcrete iya zahiri zama rauni fiye da na al'ada kankare na irin wannan mix rabbai amma tare da kasa kara.Ba shi da ruwa kuma yana da girman ƙarfin farko (kimanin 200 psi a cikin sa'a ɗaya), ba kawai ga admixtures ba har ma da matakin ƙaddamarwa da aka karɓa daga tasirin tasiri na 250-500ft.dakika dayakuma zuwa tis low ruwa / siminti rabo (kimanin 0.35).Shotcrete, tare da ƙari na musamman, na iya canza dutsen ɗan ƙaramin ƙarfi zuwa tsayayye, kuma mai rauni zuwa robobin da aka fesa dashi zai iya zama barga tare da 'yan inci kaɗan na tallafin harbin.Saboda kaddarorin sa masu rarrafe, Shotcrete na iya ɗorewa nakasu mai mahimmanci na tsawon watanni ko shekaru ba tare da gazawa ta hanyar fashewa ba.
Lokacin aikawa: Dec-06-2021
