"•1° These cylinders were tested in a closed-loop testing machine under strain controlled condi-tions and had a compressive strength varying from 3000 to 11,000 psi (20 to 75 MPa). Univ.. of Southern California. - Specially designed for mechanical engineers. - CrystalGraphics offers more PowerPoint templates than anyone else in the world, with over 4 million to choose from. Looks like you’ve clipped this slide to already. Modulus of Elasticity and Poisson Ratio of Concrete - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. It's FREE! Three hundred 150 by 300 mm concrete cylinders were prepared from three different mixtures with target compressive strengths of 30, 35, and 40 MPa. Static and dynamic tests were performed at 4, 7, 14, and 28 days to evaluate the compr… It is important that E of concrete be known because engineers … The initial tangent modulus E c in N/mm 2 is estimated from k c c f E 5000 = (1.2) where f ck = characteristic compressive strength of concrete at 28 days The initial tangent modulus E c is also known as short term static modulus of elasticity of concrete in N/mm 2 and is used to calculate the elastic deflections. strength concrete (greater than 6.0 ks i), compute the modu lus of elasticity with the ACI 363 equation below: Ec = 1265 ∙ ¥f'c + 1000 (where f’c and Ec are in ksi) For all other pretensioned and post-tensioned elements, compute the modulus of elasticity using AASHTO LRFD … Ec = Modulus of elasticity of concrete. If 5 pcf of this is allowed for the steel and w is taken as 145 pcf then: Ef 57,000 'c Concrete Material Properties Effect of voids in concrete on modulus of elasticity, compressive strength, and flexural strength CIVL 1101 Introduction to Concrete 5/10 They can be easily applied to the specimen by a pair of elastic bands supplied as standard. Lange, A.J. The initial tangent modulus E c in N/mm 2 is estimated from k c c f E 5000 = (1.2) where f ck = characteristic compressive strength of concrete at 28 days The initial tangent modulus E c is also known as short term static modulus of elasticity of concrete in N/mm 2 and is used to calculate the elastic … ATTACHMENTS & ACCESSORIES FOR CONCRETE COMPRESSION MACHINES. Spring thread. Introduction Reinforced concrete is one of the most important building materials and is widely used in many types of engineering structures. In other words there is no fixed value for the ratio of stress divided by strain. Units of elastic modulus are followings: In SI unit MPa or N/mm 2 or KN/m 2. Magnitude of creep strain is a function of all the above that affect shrinkage, plus ... - 1/18 Mechanical Testing. Strain =Dial gauge reading/gauge length = dl/L Stress = Load/Cross sectional area= P/A Use Compressometer and Extensometer to measure where. Uni-axial Stress State. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Bulk Modulus Of Elasticity And Compressibilty PPT If so, share your PPT presentation slides online with PowerShow.com. Not only does it demonstrate the ability of concrete to withstand deformation due to applied stress but also its stiffness. To view this presentation, you'll need to allow Flash. Modulus of Elasticity and Poisson Ratio of Concrete - By: Tzu-Ting Yang. The test for determining the modulus of elasticity of the concrete is known as a compression test on the cylindrical concrete sample. f’c = Compressive strength of concrete. With the in- creased use of lightweight aggregates for structural con- crete a better understanding of the relationship between weight, strength, and the elastic modulus is needed. The economy, the efficiency, the strength and the The The PowerPoint PPT presentation: "Modulus of Elasticity and Poisson Ratio of Concrete" is the property of its rightful owner. The accurate value of modulus of elasticity of concrete can be determined by conducting a laboratory test called compression test on a cylindrical concrete specimen. American Society for Testing and Materials (ASTM) Specifications include . E=3.0 x 105 kg/ cm2. - Hooke's law is only valid for the portion of the curve ... area and gage length. Shoiab Ikhlaq Introduction While the American Society for Testing and Materials (ASTM) continues to provide working standards for the concrete industry, definitive values for the material’s elastic behavior are not able to be reported due to the heterogeneous nature of concrete Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete … Calculation Procedures Young’s Modulus – E=(s 1-s 2)/(e 2-.000005) s 1 =the stress corresponding to the longitudinal strain of 50 micro strain. They'll give your presentations a professional, memorable appearance - the kind of sophisticated look that today's audiences expect. The Region of Stress-Strain Curve. CHAPTER 4. 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