Abubuwan Kariyar Kankare Masu Sauƙi | Mahimman Ayyuka Masu Kumfa don Kankalin Salon salula
Haɗaɗɗen abubuwa ne na wucin gadi ko na halitta waɗanda aka ƙara zuwa kankare don haɓaka wasu kayan sa yayin simintin, kwanciya ko matakin sabis. Wadannan admixtures yawanci a cikin nau'i na foda ko ruwaye. Bai kamata a yi la'akari da su a matsayin madadin ƙira mai kyau na haɗuwa ba, ingantaccen aiki ko amfani da kayan da suka dace; kawai taimako ne don inganta halayen kankare.
Ana amfani da haɗe-haɗe masu rage ruwa don rage buƙatar ruwa a gaurayawan kankare, wanda zai iya inganta ƙarfin samfurin siminti na ƙarshe. Wadannan admixtures rage ruwa-ciminti rabo (w/c rabo) ta har zuwa 10%. Plasticizers tsakiyar kewayon rage w/c rabo har zuwa 15%, yayin da superplasticizers na iya rage shi har zuwa 30%.
Retarding admixtures yana rage yawan hydration na siminti a farkon matakansa kuma yana tsawaita lokacin saitin siminti. Wannan yana ba da damar babban matakin haɓaka ƙarfin farko a cikin kankare kuma yana hana faruwar katsewa. Wadannan admixtures na iya zama da amfani musamman inda yankin ke ƙarƙashin babban bambancin zafin jiki ko kuma inda simintin dole ne a kwashe nisa mai nisa..
Admixtures masu haɗa iska suna ƙara juriyar siminti zuwa daskarewa da narkewa ta hanyar samar da miliyoyin ƙananan kumfa na iska a cikin haɗin.. Wadannan kumfa na iska, waɗanda ke aiki azaman ƙananan ɗakunan fadadawa, tsayayya da daskare-narke aikin ruwa a cikin kankare.
Ana amfani da abubuwan haɓaka haɓakawa galibi don samar da kankare tare da saurin saiti. Wannan yana ƙara ƙarfin farkon siminti har zuwa 40%.