Kwanan Wata: 18, Satumba, 2023

Aggregate ya mamaye babban girma na kankare, amma na dogon lokaci, akwai rashin fahimta da yawa game da ma'auni na yin hukunci akan ingancin jimlar, kuma babbar rashin fahimta shine buƙatar ƙarfin ƙarfi na Silinda.Wannan rashin fahimta ta samo asali ne daga rawar da yake takawa a cikin siminti, wato yashi da tsakuwa, kamar kwarangwal din dan Adam, wani muhimmin siga ne na tantance karfin siminti.Sabili da haka, litattafan litattafai da yawa da yawa na yau da kullum da ka'idoji har yanzu suna buƙatar ƙarfin haɗuwa ya zama sau 1.5 zuwa 1.7, ko ma sau 2 ƙarfin simintin da aka shirya.Marubucin ya yi imanin cewa lokacin da farkon simintin ƙirar ƙirar har yanzu yana da ƙasa sosai, ana gabatar da wannan buƙatun a gaba, wato, ƙarfin ƙarfin silinda na jimlar shine ≥40MPa, wanda a bayyane yake kawai don cire waɗannan dutsen tare da matsanancin yanayi a matsayin tara;Duk da haka, an inganta ƙarfin simintin ƙira sosai, kuma har yanzu yana bin alaƙar da ke tsakanin su biyun a baya, wanda a bayyane yake da gaske ya sake shi daga gaskiya.A gaskiya ma, an shirya siminti mai nauyi a gida da waje kuma an yi amfani da shi a aikin injiniya, kuma ƙarfin matsi na silinda mai nauyi da aka yi amfani da shi shine kawai 15MPa ko ƙasa, yayin da ƙarfin kankare zai iya kaiwa 80 zuwa 100MPa.

Wani mahimmin kuskuren shine matsakaicin girman ɓangarorin da za a iya amfani da su ga simintin da aka yi amfani da su ko kuma dutsen kankare (SCC).Tun da akwai dole ne dangi motsi tsakanin duwatsu a cikin aiwatar da irin wannan mix tafiya a cikin famfo bututu da kuma gudãna a cikin samfuri, da thicker da turmi lubrication film Layer da ake bukata domin zumunta motsi tsakanin dutse barbashi da ya fi girma barbashi size, wato, da more. ana iya buƙatar ƙarar ɓangaren litattafan almara.Wannan kuma shine dalilin da ya sa 19mm (British 3/4inch) shine matsakaicin girman barbashi na duwatsu da ake amfani da su wajen shirya irin wannan gaurayawan waje.Ko da yake matsakaicin girman ƙwayar duwatsun da aka yi amfani da su yana da ƙananan, ƙananan rabon da ake buƙatar cikawa a cikin haɗuwa yana da girma, wanda ke da ma'auni tsakanin yanayin da ke sama, kuma adadin turmi da ake bukata don haɗuwa yana da ƙananan.