Compressive Strength of Concrete
The aim of this paper is to analyze the way the concrete acts under compressive stresses. Different samples will be used and we will experimentally determine the values of the compressive strength.
Can be determined on cubes with l=200mm.The compressive strength will be experimentally determined and the breaking pattern will be analyzed for cubes with friction between plates of the hydraulic press and the sample's surface and without friction.
The strength is inferior to the cubical samples' and breaking pattern of prismatic samples clearly shows the transversal tension stress and of a crucial importance in the appearance of micro cracks in the vicinity of structural flaws. The strength of the sample is directly linked to the ration between b and h and to the quality of the concrete.
The aim of this paper is to analyze the way the concrete acts under tensile stresses. Experimentally, there will be established the tensile strength from bending and splitting.Strength in axial tension. Between the plates of the hydraulic press and the sample there will be placed strips of hard cardboard of 3 mm thick and 15 mm width. To avoid the local concentration of stresses.
Types of deformations:
1.Deformations due to temperature variations specific to all aggregation states.
2.Spontaneous deformations due to contraction or swelling which are following the hardening process.
3.Deformations which follow the imposed tension states by the loads' action and which have an elastic, plastic or viscose character.
The purpose of the Laboratory work.
To analyze based on the tests, the way the concrete deforms under the action of the compressive load.To calculate the elasticity modulus
To draw the concrete characteristic curve
Based on the results observations will be made on the quality of the concrete. The concrete's deformation modulus is used in the section rigidity calculus to evaluate the sectional efforts or deformations of a structure.
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