Effect of cement content increase instead of adding "Microblock" on the compressive strength of set cement : master's thesis

Uspješnost cementacije kolona zaštitnih cijevi ovisi o sastavu i svojstvima cementne kaše koja nastaje miješanjem portland cementa, aditiva i vode. Cementna kaša će kroz reakcije hidratacije s vremenom očvrsnuti u cementni kamen odgovarajuće tlačne čvrstoće i odgovarajućih svojstava. U ovom radu opisani su: bušotinski cement, njegova svojstva, klase cementa, hidratacija cementne kaše i njeno očvršćavanje u cementni kamen, svojstva cementnog kamena te su prikazani rezultati laboratorijskih ispitivanja utjecaja dodatnog cementa na svojstva cementne kaše i tlačnu čvrstoću cementnog kamena na temperaturi od 90 ºC tijekom 72 sata. Rezultati ispitivanja su uspoređeni s rezultatima prethodnih ispitivanja s dodatkom „Microblocka“.Cementation of casing string depends on composition and properties of cement slurry made by mixing portland cement, additives and water. Cement slurry, through reactions of hydration, hardens into set cement that has to be of sufficient strength and of appropriate properties. This thesis describes the properties of cement, well cement classes, hydration of cement slurry and the hardening of cement slurry into set cement and shows the results of laboratory testing on the impact of added cement on properties of cement slurry and compressive strength of set cement at the temperature of 90 °C during the period of 72 hours. The results of this testing are compared to the results of previous tests with added ,“Microblock“