INVESTIGATION OF THE MORTAR AND CONCRETE RESISTANCE IN AGGRESSIVE SOLUTIONS

Testing the influence of two aggressive solutions - sulphate and nitrate on mortar and concrete was presented in this paper. Experimental work included testing of mortar prisms with 5 % special admixture Also, four types of concrete were exposed to aggressive solutions. The chemical resistance was tested according to the Koch-Steinegger method. As a condition for resistance in aggressive solution means that flexural strength of mortar prisms is no less than 70 % of referent prisms cured in water it can be concluded that mortar and concrete made with combination of cement and admixture presented in this investigation are not resistant to ammonium nitrate solution, but are resistant to sulphate corrosion.Original Abstract: U radu je prikazan utjecaj dva agresivna rastvora - sulfata i nitrata na zbuku i beton U ekspenmentalnom radu ispitivane su prizme od zbuke s 5 % specijalnog dodatka. Cetiri vrste betona su takoder izlozene agresivnim rastvonma. Kemijska otpomost ispitivana je prema metodi Koch-Steinegger Kako je uvjet za otpomost kod agresivnih rastvora da zatezna cvrstoca zbuke nije niza od 70 % u odnosu na referentne prizme njegovane u vodi, moze se zakljuciti da zbuka i beton izradeni s kombinacijom cementa i dodataka, prikazam u ovom istrazivanju, nisu otporni na rastvor amonijak nitrata ali jesu na sulfatnu koroziju.