The target mean strength of the M20 grade concrete is 27 N/mm?. What is the value of standard deviation?
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- Portland cement concrete consists of what four primary elements?What is the compressive strength of Concrete if a 6" cylindrical sample was tested in UTM and failed at 640 kN load? о 35 MPа о 28.5 MPа o 28 MPa o 30 MPaWhat is the target mean strength (N/mm²) of the M30 grade concrete, if the standard deviation is 5.0?
- A normal-weight concrete has an average compressive strength of 4500 psi.What is the estimated modulus of elasticity?A normal-weight concrete has an average compressive strength of 20 MPa.What is the estimated flexure strength?4. Please discuss the Poisson's ratio of concrete in terms of compressive strength. Is there an equation to connect the two quantities? If yes, What are the physical bases of the equation?
- Chapter 13 Question: What is the elasticity of concrete for a normal weight mix (unit weight equal to 150 pcf) with a compressive strength of 5,000 psi? O 3.644 ksi O 4.074 ksi 4,287 ksi O 3.976 ksi O 3,834 ksiUrgent Take the unit weight of concrete to be 2400 kg/m3 and the specified compressive strength to be 28 MPa.From this, estimate the modulus of elasticity of concrete in GPa. (answer with complete solution) Final answer must be Ec = 26.752 GPaComparing PCC with mild steel, answer the following questions:a. Which one is stronger?b. Which one has a higher modulus or stiffness?c. Which one is more brittle?d. What is the range of compressive strength for a typical PCC?e. What is the compressive strength for a high-strength concrete?f. What would be a reasonable range for PCC modulus?
- A normal-weight concrete has an average compressive strength of 4500 psi. What is the estimated modulus of elasticity? What is the estimated tensile strength of this concrete?Three 100*200 mm cylindrical concrete specimens were tested for 28 days compressive strength and show 30.5 MPa, 29.6 MPa and 32.8 MPa compressive strength. a) What is the average compressive strength of this concrete? b) What is the approximate tensile strength of this concrete? c) What is the approximate modulus of elasticity of this concrete? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIU Paragraph Arial 10pt A v x² X, +, 田用国 田用因 Ť } !!A normal-weight concrete has an average compressive strength of 31 MPa. What is theestimated modulus of elasticity?