Journal of
Faculty of Civil Engineering

CONFERENCE PROCEEDINGS
4th INTERNATIONAL CONFERENCE
CONTEMPORARY ACHIEVEMENTS IN CIVIL ENGINEERING 2016 , 2016.y., pp. 361-372

	DOI: 10.14415/konferencijaGFS 2016.036
	UDC: 691.328.2 : 624.21.036.5/.7
	CC-BY-SA 4.0 license
	Author : Balázs, György L.; Nemes, Rita; Lublóy, Éva
	Summary:
	Lightweight aggregate concrete is a challenge for developing bridge girders with reduced self-weight. Savings in transportation costs for precast girders can be considerable. An extensive research started in Hungary (within a cooperation with a design office and a precast plant) to develop possible concrete mixes and design rules for precast bridge girders of lightweight aggregate concrete. Particular aspects for our studies were: selection of type of lightweight aggregate, concrete mix design, adequate curing, relatively high final compressive strength and adaptation of the production process in the prefabrication plant. An additional request was the high early age strength. As part of the research project, a prototype girder has been cast with concrete strength class of LC50/55 and density class of D2.0. In the paper we concentrate on two main aspects as bond between strands and lightweight aggregate concrete and durability (especially frost resistance and chloride ion migration).The prototype girder has been produced in industrial conditions and has been loaded up to failure.
	Keywords:
	LC, lightweight concrete, bridge girder, density, precast, prototype