Construction Materials, Methods and Techniques (MindTap Course List)
4th Edition
ISBN: 9781305086272
Author: William P. Spence, Eva Kultermann
Publisher: Cengage Learning
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Chapter 18, Problem 6RQ
To determine
The standard followed in the production of softwood lumber
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Consider the conditions in Practice Problem 5.2. How short would the driver reaction times of oncoming vehicles have to be for the probability of an accident to equal 0.20?
Part 4: Problem-Solving. Solve the following problems. Show all calculations.
1. A Standard Penetration Test (SPT) was conducted at a site, and the following blow counts were
recorded:
Depth: 2 m, Blow count (N): 10
D
D
Depth: 4 m, Blow count (N): 15
Depth: 6 m, Blow count (N): 20
The energy ratio is 60%, and the overburden correction factor CN is 1.1. Calculate the
corrected N-values for each depth.
2. A soil sample was collected from a depth of 3 m using a Shelby tube. The sample had a volume
of 0.01 m³ and a mass of 18 kg. If the water content is 12%, calculate the (a) bulk density, (b) dry
density, and (c) void ratio of the soil. Assume the specific gravity of soil solids (Gs) is 2.65.
3. A Cone Penetration Test (CPT) was conducted at a site, and the following data was obtained:
Depth: 2 m, Cone resistance (qc): 5 MPa
Depth: 4 m, Cone resistance (qc): 8 MPa
Depth: 6 m, Cone resistance (qc): 12 MPa
Estimate the soil type at each depth using typical qc correlations.
Pls show step by step and formula used
Chapter 18 Solutions
Construction Materials, Methods and Techniques (MindTap Course List)
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