PERSPECTIVES OF THE USE OF MODERN BUILDING MATERIALS IN ROAD CONSTRUCTION

Alla Kariuk, Ilona Yurko

Abstract


The authors analyzed the foreign experience of using keyed joints in reinforced concrete span structures of bridges. Fiber concrete with polypropylene fibers was chosen as the investigated material. Such fibers are chemically neutral, water-resistant, have a high resistance to dynamic loads, reduce the risk of formation and development of cracking, increase abrasion what is important in the manufacture of road construction. Optimization of concrete composition with polypropylene fibers for concreting joints by physical and mechanical parameters was carried out. Parameters of optimization were compressive strength, tensile strength at bending, axial tensile strength, prism strength and abrasion. The authors performed a series of tests to study the behavior of fiber concrete in keyed joints. The analysis of obtained results out depending on the nature of failure, the value of the ultimate load and fiber concrete deformations were carried out.

The influence on the joints strength of the cross-section reinforcement percentage and the nature of placement of the reinforcing rods was considered.

It was established if to place a cross-reinforcement in two levels it increases the strength of joints in comparison with a single level with the same percentage of reinforcement. It was noted that the fracture of all samples occurred from the sear key. Cracking of fiber concrete experimental samples occurred at later stages of loading compared with samples of ordinary concrete, and the fracture was not brittle, without tearing off parts of concrete. Increase in strength is due to the chaotic placement of polypropylene fibers in concrete, and therefore, to remove fibers from concrete, it is necessary to spend more energy, which ultimately leads to an increase in strength of joint.

Experimental data suggest possibility and feasibility of polypropylene fibers in concrete joints in precast concrete structures of bridges

Keywords


experimental research; precast reinforced concrete bridge; polypropylene fiber; fiber concrete; keyed joint

Full Text:

PDF

References


Hallmark, R., Collin, P., Nilsson, M. (2009). Prefabricated Composite Bridges. IABSE Symposium Report, 96 (9), 107–117. doi: 10.2749/222137809796078748

VSN 98-74. Tekhnicheskiye ukazaniya po proyektirovaniyu, izgotovleniyu i montazhu sostavnykh po dline konstruktsiy zhelezobetonnykh mostov (1975). Moscow: Mintransstroy.

Rabinovich, F. N. (2004). Kompozity na osnove dispersno armirovannykh betonov. Voprosy teorii i proyektirovaniya, tekhnologiya, konstruktsii. Moscow: Publishing house ABC, 560.

Building composites (2014). Novosibirsk: NP "SibAK", 231.

Ekspertnyy vysnovok pro mozhlyvistʹ vykorystannya polipropilenovoyi fibry vyrobnytstva TOV «SPETSNAB» v dorozhnʹomu budivnytstvi (2007). Kyiv: DerjdorNDI.

Zaklyucheniye o rezul'tatakh sravnitel'nykh ispytaniy obraztsov tyazhelogo betona i fibrobetona, gde v kachestve fibry ispol'zovany volokna armiruyushchiye polipropilenovyye proizvodstva OOO «DIiF» (2004). Donetsk: Donetskiy PromstroyNIIproyekt, 14.

Vremennyye rekomendatsii po primeneniyu fibrobetona pri remonte i soderzhanii iskusstvennykh sooruzheniy na avtomobil'nykh dorogakh (2002). Moscow: Mintransstroy.

Yurko, I. A. (2012). Mitsnistʹ shponkovykh stykiv iz fibrobetonu na osnovi syntetychnykh volokon. Poltava, 187.

Nauman, А. Е., Argon, A. S. (1973). Theory of fracture of cement material reinforced with fibers. Сement and Concrete Research, 3 (4), 197–199.

Dovzhenko, O., Pohribnyi, V., Yurko, I., Shostak, I. (2017). The bearing capacity experimental determination of the keyed joints models in the transport construction. MATEC Web of Conferences, 116, 02011. doi: 10.1051/matecconf/201711602011




DOI: http://dx.doi.org/10.21303/2585-6847.2017.00481

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Alla Kariuk, Ilona Yurko

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

ISSN 2585-6847 (Online), ISSN 2585-6839 (Print)