Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134322896
Author: MAMLOUK
Publisher: PEARSON
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Chapter 1, Problem 1.43QP
Briefly discuss the variability of construction materials. Define the terms accuracy and precision when tests on materials are performed.
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Briefly discuss the variability of construction materials. Define the termsaccuracy and precision when tests on materials are performed.
Measurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01,0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported?a. Deformation of a steel specimen during the tension test (mm)b. Tensile strength of steel (MPa)c. Modulus of elasticity of aluminum (MPa)d. Weight of aggregate in a sieve analysis test (grams)e. Compressive strength of portland cement concrete (MPa)f. Moisture content in a concrete masonry unit (percent)g. Asphalt content in hot-mix asphalt (percent)h. Specific gravity of woodi. Distance between New York City and Los Angeles (km)j. Dimensions of a computer microchip (mm)
Measurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01,0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported?a. Deformation of a steel specimen during the tension test (in.)b. Tensile strength of steel (psi)c. Modulus of elasticity of aluminum (MPa)d. Weight of aggregate in a sieve analysis test (grams)e. Compressive strength of portland cement concrete (psi)f. Moisture content in a concrete masonry unit (percent)g. Asphalt content in hot-mix asphalt (percent)h. Specific gravity of woodi. Distance between New York City and Los Angeles (miles)j. Dimensions of a computer microchip (mm)
Chapter 1 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 1 - State three examples of a static load application...Ch. 1 - A material has the stressstrain behavior shown in...Ch. 1 - A tensile load of 50.000 lb is applied to a metal...Ch. 1 - A tensile load of 190 kN is applied to a round...Ch. 1 - A cylinder with a 6.0 in. diameter and 12.0 in....Ch. 1 - A metal rod with 0.5 inch diameter is subjected to...Ch. 1 - A rectangular block of aluminum 30 mm 60 mm 90...Ch. 1 - A plastic cube with a 4 in. 4 in. 4 in. is...Ch. 1 - A material has a stressstrain relationship that...Ch. 1 - On a graph, show the stressstrain relationship...
Ch. 1 - The rectangular block shown in Figure P1.11 is...Ch. 1 - The rectangular metal block shown in Figure P1.11...Ch. 1 - A cylindrical rod with a length of 380 mm and a...Ch. 1 - A cylindrical rod with a radius of 0.3 in. and a...Ch. 1 - A cylindrical rod with a diameter of 15.24 mm and...Ch. 1 - The stressstrain relationship shown in Figure...Ch. 1 - A tension test performed on a metal specimen to...Ch. 1 - An alloy has a yield strength of 41 ksi, a tensile...Ch. 1 - Prob. 1.21QPCh. 1 - Figure P1.22 shows (i) elasticperfectly plastic...Ch. 1 - An elastoplastic material with strain hardening...Ch. 1 - A brace alloy rod having a cross sectional area of...Ch. 1 - A brass alloy rod having a cross sectional area of...Ch. 1 - A copper rod with a diameter of 19 mm, modulus of...Ch. 1 - A copper rod with a diameter of 0.5 in., modulus...Ch. 1 - Define the following material behavior and provide...Ch. 1 - An asphalt concrete cylindrical specimen with a...Ch. 1 - What are the differences between modulus of...Ch. 1 - Prob. 1.33QPCh. 1 - A metal rod having a diameter of 10 mm is...Ch. 1 - What is the factor of safety? On what basis is its...Ch. 1 - Prob. 1.36QPCh. 1 - Prob. 1.37QPCh. 1 - A steel rod, which is free to move, has a length...Ch. 1 - In Problem 1.38, if the rod is snugly fitted...Ch. 1 - A 4-m-long steel plate with a rectangular cross...Ch. 1 - Estimate the tensile strength required to prevent...Ch. 1 - Prob. 1.42QPCh. 1 - Briefly discuss the variability of construction...Ch. 1 - In order to evaluate the properties of a material,...Ch. 1 - A contractor claims that the mean compressive...Ch. 1 - A contractor claims that the mean compressive...Ch. 1 - Prob. 1.47QPCh. 1 - Prob. 1.48QPCh. 1 - Prob. 1.49QPCh. 1 - Briefly discuss the concept behind each of the...Ch. 1 - Referring to the dial gauge shown in Figure P1.51,...Ch. 1 - Repeat Problem 1.51 using the dial gauge shown in...Ch. 1 - Measurements should be reported to the nearest...Ch. 1 - During calibration of an LVDT, the data shown in...Ch. 1 - During calibration of an LVDT, the data shown in...
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- We have 2 different materials which are "A" and "B". Material Name Modulus of Elasticity (GPa) Length (mm) Diameter (mm) K (Bulk Modulus) (GPa) A 70 100 10 65 B 50 100 10 67 Please answer these questions according to data; 1) Which one can show more deformation if the same tensile load is applied? 2) Which one increases more in diameter if the same compression load is applied? 3) Which one is more ductile?arrow_forwardA plastic cube with a 4 in. x 4 in. x 4 in. is placed in a pressure chamber and subjected to a pressure of 15,000 psi. If the modulus of elasticity is 1,000 ksi and Poisson’s ratio is 0.49, what will be the decrease in each side of the block, assuming that the material remains within the linear elastic region? What will be the decrease in the volume of the cube?arrow_forwardA specimen is originally 300 mm long, has a diameter of 12 mm, and is subjected to a force of 2.4 kN. When the force is increased from 2.4 kN to 9 kN, the specimen elongates 0.250 mm. Determine the modulus of elasticity for the material if it remains linear elastic. Express your answer to three significant figures and include the appropriate units.arrow_forward
- A specimen is originally 1 ft long, has a diameter of 0.5 in., and is subjected to aforce of 500 lb. When the force is increased from 500 lb to 1800 lb, the specimenelongates 0.009 in. Determine the modulus of elasticity for the material if it remainslinear elastic.Note: Draw the given data.arrow_forwardMeasurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01, 0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported? Deformation of a steel specimen during the tension test (in.) Tensile strength of steel (psi) Modulus of elasticity of aluminum (MPa) Weight of aggregate in a sieve analysis test (grams) Compressive strength of portland cement concrete (psi) Moisture content in a concrete masonry unit (percent) Asphalt content in hot-mix asphalt (percent) Specific gravity of wood Distance between New York City and Los Angeles (miles) Dimensions of a computer microchip (mm)arrow_forwardDefine the termsaccuracy and precision when tests on materials are performed.arrow_forward
- A specimen is originally 300mm long, has a diameter of 14mm, and is subjected to a force of 2 kN. When the force is increased from 2 kN to 8 kN, the specimen elongates 0.225 mm. Determine the modulus of elasticity for the material if it remains linear elastic. Express your answer to three significant figures and include the appropriate units.arrow_forward6.What is elastic deformation? Plot the load-deformation curve for an elastic material schematically under loading and unloading on the graph below.arrow_forwardA 10 cm long rectangular bar (when subjected to a tensile load) deforms by 0.1 mm. Calculate the normal strain.arrow_forward
- Determine the ductility of a tested material in terms of percent elongation and percent reduction of area. The test result data is as follows:Do = 0.198 inDf = 0.0888 in Lo = 8 inLf = 9.67 inarrow_forwardQuestion 1: A 25mm diameter aluminum rod is loaded axially in tension with a load of 100kN. The rod is 4 m in length. Aluminum has a modulus of elasticity of 69GPa and a Poisson’s ratio of 0.35. 1) What is the decrease in diameter of the rod due to the applied load? 2) What is the new length of the rod?arrow_forwardCalculate the ductility of a tested material in terms of percent elongation and percent reduction of area. The test result data is as follows:?? = 8 ???? = 9.67 ???? = 0.198 ???? = 0.0888 ??arrow_forward
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