Compressive strength is a widely accepted measure to access the performance of a given concrete mixture....
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Compressive strength is a widely accepted measure to access the performance of a given concrete mixture. Considering this aspect of concrete is important because it is the primary measure determining how well concrete can withstand loads that affect its size. It accurately tells us whether a particular mix is suitable to meet the requirements of a specific project. Compression strength gives an overall indication of quality of concrete as it is directly related to the lifelong performance of the concrete structure. The strength of the concrete shows the ability of the structure to withstand various loads (i.e. Dead Load, Live Load, Earthquake Load, Wind Load, etc..). To perform the following analyses, you are required to install BSDA package in your R: install.packages ("BSDA") The variables provided in "concrete.csv" elaborated as follows: concrete compressive strength Cement composition Blast Furnace slag Fly Ash Water (a) Strength; cement; slag; ash; water; QUESTION 1 (20 marks) (b) superplastic; coarseagg; fineagg; age Superplasticizer Coarse Aggregate Fine Aggregate Age of concrete According to the standard from International Building Code (IBC) and ACI 318 the mean concrete compressive strength must be a minimum 28 MPa for structural concrete. Based on the data presented in "concrete.csv": (ii) Test the hypothesis at 5% level of significance. (8 marks) Suppose that the standard deviation is 15, test the hypothesis at 1% level of significance. (6 marks) The strength of the concrete is highly dependent on the hydration reaction between the water and cement. For the reinforced concrete, the cement content cannot be more than 360 kg/m³. For the sample data collected, test the hypothesis at 5% level of significance. (6 marks) Compressive strength is a widely accepted measure to access the performance of a given concrete mixture. Considering this aspect of concrete is important because it is the primary measure determining how well concrete can withstand loads that affect its size. It accurately tells us whether a particular mix is suitable to meet the requirements of a specific project. Compression strength gives an overall indication of quality of concrete as it is directly related to the lifelong performance of the concrete structure. The strength of the concrete shows the ability of the structure to withstand various loads (i.e. Dead Load, Live Load, Earthquake Load, Wind Load, etc..). To perform the following analyses, you are required to install BSDA package in your R: install.packages ("BSDA") The variables provided in "concrete.csv" elaborated as follows: concrete compressive strength Cement composition Blast Furnace slag Fly Ash Water (a) Strength; cement; slag; ash; water; QUESTION 1 (20 marks) (b) superplastic; coarseagg; fineagg; age Superplasticizer Coarse Aggregate Fine Aggregate Age of concrete According to the standard from International Building Code (IBC) and ACI 318 the mean concrete compressive strength must be a minimum 28 MPa for structural concrete. Based on the data presented in "concrete.csv": (ii) Test the hypothesis at 5% level of significance. (8 marks) Suppose that the standard deviation is 15, test the hypothesis at 1% level of significance. (6 marks) The strength of the concrete is highly dependent on the hydration reaction between the water and cement. For the reinforced concrete, the cement content cannot be more than 360 kg/m³. For the sample data collected, test the hypothesis at 5% level of significance. (6 marks)
Expert Answer:
Answer rating: 100% (QA)
1 According to the standard from International Building Code IBC and ACI 318 the mean concrete compr... View the full answer
Related Book For
Posted Date:
Students also viewed these general management questions
-
Herbie Bittman, Age 17, Executed a contract for the purchase of a pleasure car from a used car dealer for $2,000 . When Herbie Changed his mind, and attempted to return the car three months later,...
-
(5 points) Construct a simple graph with vertices P, Q, R, S, T, U that has an Euler trail, the degree of Q is 1 and the degree of S is 3. What is the edge set?
-
Explain the values of the kinetic isotope effect (kH/kD) for the following reactions, indicating what each value means, the reason for the determination made, and the mechanism of each reaction that...
-
2 3 -4 6,-12,-18 If A = (a) 0 3a 2b 24 (b) -6,4,9 and KA= then the value of k, a,b are respectively (c) -6,-4,-9. (d) -6,12,18
-
Repeat Worked-Out Problem 21.3, but assume instead that the salesperson's personal cost is C(H) = 1,000 + 4H2, and this marginal cost is MC = 8H. In addition, while each car generates a profit of...
-
If oil leaks from a tank at a rate of r (t) gallons per minute at time t, what does 120 r (t) dt represent?
-
Crush Autosmashers can purchase a new electromagnet for moving cars at a cost of \($20,000.\) At the end of its useful life, the electromagnet will be worth \($1,000.\) If Crushs MARR is 12...
-
Wang Co. has delivery equipment that cost $50,000 and has been depreciated $24,000. Instructions Record entries for the disposal under the following assumptions. (a) It was scrapped as having no...
-
x Determine the solution of the following system of equations via row reduction of the corresponding augmented matrix: x+5y+3z 11 y 23 z = 4 = 11 y + 21 z = 1 Give your answer in the form of a row...
-
Bruce also requires a calculation of taxable income for the most recent year ended December 31, 2019. The calculation should be prepared in Excel. He has also requested that you prepare the year-end...
-
How is a change of state called, when the volume remains constant (V=const.)? Mark the applicable statements a. isotherm b. isentropic c. isochoric d. isobaric
-
The following data were taken from the financial records of Oriole Company. Net sales Beginning inventory Purchases Ending inventory (a) 2025 Inventory turnover $6,420,000 940,300 4,684,945 1,144,000...
-
A spring operated wind up toy is slowing down as it moves up a ramp. The initial is when the toy is wound up, but at rest at the bottom of the ramp. The final is the toy still moving at the top of...
-
Advanced Instruments had retained earnings of $350,000 at December 31, 2020. Net income for 2021 totaled $180,000, and dividends declared for 2021 were $70,000. How much retained earnings should...
-
Dobosh Corporation has provided the following information: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Sales commissions Variable administrative expense...
-
Alevy & List (2005) find that when we compare the behavior of financial professionalswiththatofuniversitystudents...
-
Ashlee, Hiroki, Kate, and Albee LLC each own a 25 percent interest in Tally Industries LLC, which generates annual gross receipts of over $10 million. Ashlee, Hiroki, and Kate manage the business,...
-
It has been said that the concept of opportunity cost is central to economics and economic thinking. Understanding opportunity cost will help an entrepreneur determine the true value of decisions....
-
(1) If contracts are incomplete, would allocating some control rights to employees be an efficient way to induce employees to develop firm-specific human capital? Explain (2) Since the government...
-
The income elasticity of demand for automobiles in the United States was estimated by a government agency to be between 2.5 and 3.9. a. What does this mean? b. If incomes rise by 10 percent, what...
-
A circular shaft of radius \(r\) in the figure has a moment of inertia \(I\) and polar moment of inertia \(J\). The shaft is under torsion \(T_{z}\) in the positive zaxis and bending moment \(M_{x}\)...
-
A 20mm diameter rod made of a ductile material with a yield strength of \(350 \mathrm{MPa}\) is subject to a torque of \(T=100 \mathrm{~N} \cdot \mathrm{m}\) and a bending moment of \(M=150...
-
The figure below shows a round shaft of diameter \(1.5 \mathrm{in}\). loaded by a bending moment \(M_{z}\) \(=5,000 \mathrm{lb} \cdot\) in., a torque \(T=8,000 \mathrm{lb} . \cdot\) in., and an axial...
Study smarter with the SolutionInn App