Testing of Properties of Self-Compacting Light Concrete wIith the Addition of Milled Brick under the Fire : Undergraduate Thesis

Beton je najkorišteniji materijal pri izgradnji različiti konstrukcija, zbog svojih mnogih svojstava. U ovom radu je ispitano svojstvo otpornosti na požar specijalnog betona. Točnije, ispitana su svojstva samozbijajućeg lakog betona pod utjecajem visokih temperatura. Korišteni su uzorci oblika valjka, stari pet godina. Uzorci su izloženi temperaturama od 100℃, 300℃, 500℃ i 700℃. Prije i nakon izlaganja uzoraka visokim temperaturama zabilježena je dimenzija, masa i protok ultrazvučnog impulsa. Nakon izlaganja visokim temperaturama ispitana je tlačna čvrstoća, dinamički modul elastičnosti i promjena mase. Ovisno o temperaturnim promjenama pojavljuju se različite kemijske promjene minerala unutar očvrsle paste i agregata.Concrete is the most used material in the construction of various structures, because of its many properties. This paper examines the fire resistance properties of special concrete. More specifically, the properties of high-temperature self-compacting lightweight concrete were tested. Roller-shaped specimens, five years old, were used. Samples are exposed to temperatures of 100 ℃, 300 ℃, 500 ℃ and 700 ℃. Before and after exposure of the samples to high temperatures, the dimension, mass and flow of the ultrasonic pulse were recorded. After exposure to high temperatures, the compressive strength, dynamic modulus of elasticity and mass change were tested. Depending on the temperature changes, different chemical changes of minerals occur within the cured paste and aggregate. Keywords: Self-compacting lightweight concrete, milled brick, sample mass, dynamic modulus of elasticity, result analysi