![]() If the tensile stress at the bottom of the concrete layer exceeds 50 percent of the modulus of rupture of the concrete, you need to consider repetitions. As a result, your concrete thickness will be higher.Īs pointed out by OG you might need to consider repetitions of load as well as all axles to exert load on the pavement. You need to consider much higher loading, mostly due to the loading/unloading equipment to be used. If this is a container terminal pavement, your loads and concrete thickness are way too low. ![]() RE: rigid pavement design oldestguy (Geotechnical) 19 May 20 15:36 ![]() Also i keep noticing in literature that rebar reinforcement consists of a single mesh put in the middle of the slab and that they only reduce cracking of the concrete rather than contributing to tensile resistance why is that true ? However even after double checking units and stuff i am always getting negative tensile stress in corner loading condition of about -0.09 MPa is that normal ?Įdit: i believe it only means there is a cantilever situation so its actually normalĢ-How am i supposed to know the thermal gradient in the slab ? do i assume 20 C° difference between the top and the bottom of the slab ?ģ-Do i have to prescribe an admixture to accelerate hardening since there are cases of live load traversing the concrete at a very young age ?. ġ- I am using Westergaard modified method with a concrete of 28 MPa compressive strength and a slab thickness of 20 cm (6 in ) and a poisson ratio of 0.25 and taking only the front wheels of a truck which i believe delivers 6 t of live load. ![]() This is the first time i am designing rigid pavement for a container terminal project and i am not really experienced with the subject so please bare with me. ![]()
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