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Tsementbetoon versus asfaltbetoon teedeehituses

Astreika, Artjom (2018) Tsementbetoon versus asfaltbetoon teedeehituses. [thesis] [en] Cement concrete vs asphalt concrete in road construction.

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Abstract

Lõppkokkuvõttes tahaks öelda, et kui võrrelda betoonteede ja asfaltteede eeliseid ja puuduseid, siis ei saa öelda, kumb tee on parem, kuna igal teel on omad tähtsad eelised ja puudused. Lõputöö kirjutamiseks oli kasutatud erinevad raamatud, ajalehed, kõrgkooli materjalid, veebilehed ja inimeste kogemused. Lõputöö kirjutamisel, tekis probleem asfalt-ja betoonteede hindade leidmises. Kui võrrelda materjalide hinda, siis betoonteed on kallimad, kuid mitte oluliselt. Betoonteed on umbes 3-5 % kallimad, kuid siin tuleb arvestada ka muid aspekte nagu näiteks: masina tunnihind, betooni mark, killustiku fraktsioon, kogus. Kui võrrelda materjalide vastupidavust, siis siin tunduvalt võidavad betoonteed, kuna betoonteedele jaguneb koormus laiemale alale ja ei lase koormust läbi kõiki konstruktsiooni kihte. Kui võrrelda materjali eluiga, siis betoonteede eluiga on pikem, kuid tingimusel, et me räägime soojast kliimast. Kuna Eestis on külm kliima, siis betoon ei pea nii hästi vastu nagu näiteks Poolas. Eestis on ka palju sademeid, vesi lõhub betoontee konstruktsiooni seest – betoontee armatuuril tekib korrosioon. Vee pärast tekkivad ka praod, väheneb betoontee tugevus ja külma taluvus. Autori arvates, Eestis sobivad paremini asfalteed, kuna asfaltteedele võib liiklust panna juba mõnede tunnide pärast, betoonteed vajavad oma maksimaalse tugevuse saavutamiseks 28 päeva. Betoonteele liiklust saab panna peale siis, kui betoon saavutab oma minimaalse survetugevuse (teoreetiliselt ainult umbes 4 MPa, aga kliendile antud detailses kirjelduses on välja toodud 20 MPa). Eestis ei ole vajalikke masinaid, et ehitada betoonteid. Betoonteede ehitamiseks on tähtis, et betoontehas oleks objektist maksimaalselt 10 km kaugusel. Asfaltteede defekte (näiteks praod, augud) on kergemini parandada. Kokkuvõttes võib öelda, et Eestis sobivad paremini asfaltteed kui betoonteed. Kui sooja kliima riikides betoonteed püsivad umbes 40 aastat, siis Eestis püsivad nad tundlikult vähem.

Abstract [en]

Topic of the current final paper is Cement Concrete vs Asphalt Concrete in Road Construction. To summarize, I would like to say that when comparing concrete and asphalt road’s pros and cons it’s hard to say which is better since each road type has it’s own advantages and disadvantages. Different books, newspapers, college materials, websites and people's experiences were used to write the thesis. When writing this thesis, a problem occurred when searching for the prices of asphalt and concrete roads. If you compare the prices of both types of roads then concrete roads are more expensive, but not in a major way. Concrete roads are about 3-5% more expensive, but other aspects like, for example: hourly prices of machinery, concrete grade, gravel fraction, quantity, must be taken into account here. Comparing the durability of materials, concrete roads are given preference here because the concrete roads share the load on a wider area and do not let the load pass through all layers of the structure. When comparing the serviceable life expectancy of a material, the serviceable life expectancy of concrete roads is longer, given that we are talking about a warm climate. Since Estonia has a cold climate then it can be said that concrete roads do not hold up as good, as for example it would have in Poland. Estonia also has a lot of rainfall, water breaks down concrete roads from the inside creating corrosion of the concrete road’s armature. Water also causes cracks, cold tolerance decreases and concrete road’s strength also decreases. In the author’s subjective opinion asphalt roads are better suited for Estonia, as you can begin using the road after a few hours, while concrete roads need 28 days to reach their maximum strength. Concrete roads can be put to use only when concrete achieves its minimum compressive strength (in theory, only about 4 MPa, but the detailed description given to the client is 20 MPa). There are no machines available in Estonia, to begin building concrete roads. When building concrete roads, it’s important for the concrete making factory to be within a maximum distance of 10 km from the site. It is easier to repair cracks and holes for asphalt roads. In conclusion it can be said that in Estonia, it’s better to use asphalt roads than concrete roads. If the serviceable life expectancy of concrete roads of warm climate countries is approximately 40 years, then in Estonia it is noticeably less.

Item Type: thesis
Advisor: Meelis Toome
Subjects: Construction > Road Construction > Road design > Road construction materials
Divisions: Institute of Construction > Road Construction
Depositing User: Artjom Astreika
Date Deposited: 11 Jun 2018 07:18
Last Modified: 27 Aug 2019 07:40
URI: http://eprints.tktk.ee/id/eprint/4102

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