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Question 4 Briefly describe the fracture patterns of concrete cylinders during a compression test. (a) (b) (c) (d) (e) ☑ (f)

Question 4 Briefly describe the fracture patterns of concrete cylinders during a compression test. (a) (b) (c) (d) (e) ☑ (f)

Fundamentals Of Construction Estimating
Fundamentals Of Construction Estimating
4th Edition
ISBN:9781337399395
Author:Pratt, David J.
Publisher:Pratt, David J.
Chapter11: Pricing Concrete Work
Section: Chapter Questions
Problem 4RQ
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Question 4
Question Identify the correct sequence of the concrete manufacturing process by rearranging the order of the process shown below: Finishing Placing (Pouring) Curing Mixing Maintenance Mix design (proportioning) Vibrating (consolidating) Transporting Match each of these shrinkage regions (from I to V) with the 5 shrinkage mechanisms in the bullets Shrinkage (%) 90% RH Water loss from larger capillary pores Decomposition of C-S-H 0 Region N 25 Region IN Region III 55% RH .50 10% RH Structural water from C-S-H Region IV Region 0% RH 105°C Absorbed water loss Water loss from smaller capillary pores 200°C 1 0 6.25 12.5 18.75 25 Weight Loss (%) .75 Question 2 Mention five different methods of concrete curing. What will happen if concrete is not cured? Draw a graph showing the typical relation between the compressive strength and age for continuously moist-cured concrete and concrete cured for 3 days only. Label all axes and curves. Question 3 a) Provide a brief definition of the different types of concrete's strength b) Define the relationship between compressive and tensile strength and provide an example c) What are the factors that affect concrete's compressive strength? Question 4 Briefly describe the fracture patterns of concrete cylinders during a compression test. (a) (b) (c) (d) (f) ☐☐ ☐ ☐
Transcribed Image Text:Question Identify the correct sequence of the concrete manufacturing process by rearranging the order of the process shown below: Finishing Placing (Pouring) Curing Mixing Maintenance Mix design (proportioning) Vibrating (consolidating) Transporting Match each of these shrinkage regions (from I to V) with the 5 shrinkage mechanisms in the bullets Shrinkage (%) 90% RH Water loss from larger capillary pores Decomposition of C-S-H 0 Region N 25 Region IN Region III 55% RH .50 10% RH Structural water from C-S-H Region IV Region 0% RH 105°C Absorbed water loss Water loss from smaller capillary pores 200°C 1 0 6.25 12.5 18.75 25 Weight Loss (%) .75 Question 2 Mention five different methods of concrete curing. What will happen if concrete is not cured? Draw a graph showing the typical relation between the compressive strength and age for continuously moist-cured concrete and concrete cured for 3 days only. Label all axes and curves. Question 3 a) Provide a brief definition of the different types of concrete's strength b) Define the relationship between compressive and tensile strength and provide an example c) What are the factors that affect concrete's compressive strength? Question 4 Briefly describe the fracture patterns of concrete cylinders during a compression test. (a) (b) (c) (d) (f) ☐☐ ☐ ☐
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