2 research outputs found
Self-compacting concrete with the addition of filler from crushed testing concrete cubes : Master's Thesis
Ponovna upotreba staroga betona kao sastavnog dijela novoga betona poželjna je zbog očuvanja okoliša. U radu su prikazana svojstva samozbijajućeg betona (SZB) s dodatkom punila od mljevenih ispitnih betonskih kocaka koje se dobilo mljevenjem ispitnih betonskih kocaka. Izrađeno je ukupno devet mješavina samozbijajućeg betona. Cilj istraživanja je utvrditi utjecaj ovakvog dodatka na svojstva samozbijajućeg betona u svježem i očvrslom stanju. Provedena istraživanja su: V-lijevak, razastiranje slijeganjem, J-prsten, L-kutija te tlačna čvrstoća nakon 7 i 28 dana, dinamički modul elastičnosti i upijanje.Reuse of old concrete as a component of new concrete is preferable for the sake of environmental protection. The study examined the properties of self-compacting concrete (SCC) with the addition of filler from crushed testing concrete cubes. Nine self-compacting concrete mixtures were prepared. The aim of the study was to see how the composition of the concrete affects the properties of the fresh and hardened state. Next studies have been performed: V-funnel, spreading settling, J-ring, L-box and compressive strength after 7 and 28 days, modulus of elasticity and absorption
EFFECT OF FILLER FROM RECYCLED CONSTRUCTION WASTE ON PROPERTIES OF SELF-COMPACTING CONCRETE IN FRESH AND HARDENED STATES
Construction waste is becoming a growing concern in the modern world. Waste recycling reduces the need for landfills and preserves natural resources. This paper investigates the possibility of using construction waste in self-compacting concrete. Fillers of various particle sizes were prepared by grinding several types of waste directly without any sorting or separation. Eighteen mixtures of concrete were prepared by varying the types and proportions of fillers and other additives, and they were tested for workability in fresh state, compressive strength, and dynamic modulus of elasticity after 7 and 28 days of hardening. Eventually, the mixtures were also tested for water absorption. Results indicated that fresh concrete samples did not meet all the requirements of self-compacting concrete, and therefore guidelines were proposed for improving the composition of concrete