Kwanan Wata:15, Jan,2024
1. Aiwatar da siminti:
Abubuwan da ke tattare da siminti da kayan siminti suna da rikitarwa kuma suna canzawa.Daga hangen nesa na tsarin watsawa-adsorption, ba shi yiwuwa a sami wakili mai rage ruwa wanda ya dace da komai.Ko da yakepolycarboxylate wakili mai rage ruwa yana da saurin daidaitawa fiye da jerin naphthalene, har yanzu yana iya samun rashin daidaituwa ga wasu siminti.Wannan karbuwa yawanci yana nunawa a cikin: rage yawan raguwar ruwa da kuma karuwar raguwar raguwa.Ko da siminti iri ɗaya ne, tasirin rage ruwa zai bambanta lokacin da aka niƙa ƙwallon zuwa nau'in kyaututtuka daban-daban.
Al'amari:Tashar hadawa tana amfani da wani siminti P-042.5R a cikin gida don samar da simintin C50 zuwa wurin gini.Yana amfani da apolycarboxylatesmai rufiwakili mai rage ruwa.A lokacin da yin siminti mix rabo, an gano cewa adadin rage ruwa wakili amfani a cikin siminti ne Ya dan kadan fiye da sauran siminti, amma a lokacin da ainihin hadawa, da slump na masana'anta kankare cakude da aka gani a 21Omm.A lokacin da na je wurin da ake aikin domin sauke motar famfo, sai na ga motar ta kasa sauke simintin.Na sanar da masana'anta don aika ganga.Bayan an ƙara wakili mai rage ruwa kuma an haɗa shi, raguwar gani ta kasance 160mm, wanda ya cika buƙatun famfo.Duk da haka, a lokacin da ake sauke kayan, ya bayyana cewa ba za a iya sauke shi ba.Nan da nan aka mayar da motar simintin zuwa masana’anta, sannan aka zuba ruwa mai yawa da kuma dan karamin adadin da ake ragewa.Da kyar aka fitar da wakiliyar ruwa kuma an kusan ƙarfafa shi a cikin motar mahaɗar.
Binciken dalilai:Ba mu dage kan gudanar da gwaje-gwajen daidaitawa tare da haɗakarwa akan kowane rukunin siminti ba kafin buɗewa.
Rigakafin:Yi gwajin haɓakawa tare da mahaɗin haɗin ginin don kowane rukunin siminti kafin buɗewa.Zaɓi abubuwan da suka dace."Gangue" a matsayin admixture na siminti yana da rashin daidaituwa ga polycarboxylate smai rufiabubuwan rage ruwa, don haka a guji amfani da shi.
2.Kwarai da shan ruwa
Sakamakon amfani dapolycarboxylate wakili mai rage ruwa, yawan amfani da ruwa na kankare yana raguwa sosai.Ruwan da aka yi amfani da shi na kankare guda ɗaya yawanci 130-165kg;Ruwa-ciminti rabo ne 0.3-0.4, ko ma kasa da 0.3.A cikin yanayin ƙarancin amfani da ruwa, jujjuyawar ƙari na ruwa na iya haifar da manyan canje-canje a cikin slump, yana haifar da cakuɗen kankare don haɓaka kwatsam a cikin rugujewa da zubar jini.
Al'amari:Tashar hadawa tana amfani da siminti P-032.5R daga wani masana'antar siminti don shirya kankare C30.Kwangilar tana buƙatar cewa slump zuwa wurin ginin shine 150mm: t30mm.Lokacin da kankare ya bar masana'anta, slump da aka auna shine 180mm.Bayan an kai shi wurin ginin, ana auna simintin a wurin ginin.Rikicin ya kai 21Omm, kuma an dawo da manyan motoci biyu na siminti a jere.Lokacin da aka dawo cikin masana'anta, an tabbatar da cewa slump har yanzu 21Omm, kuma akwai zub da jini da delamination.
Dalili:Wannan siminti yana da kyawawa mai kyau ga wannan wakili mai rage ruwa, kuma adadin mai rage ruwa ya ɗan fi girma.Lokacin hadawa bai isa ba, kuma slump na kankare lokacin barin injin ba shine slump na gaskiya ba saboda ɗan gajeren lokacin haɗuwa.
Rigakafin:Don siminti wanda ke kula da adadin polycarboxylatesmai rufiruwa-rage admixtures, da sashi na admixtures dole ne ya dace da ma'auni daidaito dole ne high.Daidai tsawaita lokacin hadawa.Ko da tare da tagwaye-shaft tilasta mahautsini, da hadawa lokaci kada ya zama kasa da 40 seconds, zai fi dacewa fiye da 60 seconds.
Lokacin aikawa: Janairu-15-2024