Using the following data for an unreinforced PCC Pavement slab:■ Design strength f′c = 28 MPa■ Slab thickness = 300 mm■ Standard deviation of f′c obtained from 20 samples = 1.4 MPa■ Ignore any exposure requirement■ Use air-entrained concrete■ Fineness modulus of fine aggregate = 2.60■ Maximum aggregate size = 50 mm and nominal maximum aggregatesize = 37.5 mm■ Bulk oven-dry specific gravity of coarse aggregate = 2.6■ Oven-dry rodded density of coarse aggregate = 2002 kg/m3Find the following:a. Required compressive strengthb. w/c ratioc. Coarse aggregate amount (kg/m3)d. If the w/c ratio is 10% reduced, will the quantity of coarse aggregateincrease, decrease or remain the same? Explain your answer.

Using the following data for an unreinforced PCC Pavement slab:■ Design strength f′c = 28 MPa■ Slab thickness = 300 mm■ Standard deviation of f′c obtained from 20 samples = 1.4 MPa■ Ignore any exposure requirement■ Use air-entrained concrete■ Fineness modulus of fine aggregate = 2.60■ Maximum aggregate size = 50 mm and nominal maximum aggregatesize = 37.5 mm■ Bulk oven-dry specific gravity of coarse aggregate = 2.6■ Oven-dry rodded density of coarse aggregate = 2002 kg/m3Find the following:a. Required compressive strengthb. w/c ratioc. Coarse aggregate amount (kg/m3)d. If the w/c ratio is 10% reduced, will the quantity of coarse aggregateincrease, decrease or remain the same? Explain your answer.

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter18: Bituminous Materials

Section: Chapter Questions

Problem 5P: Given the specifications for an asphaltic concrete mixture and the results of a sieve analysis,...

See similar textbooks

Similar questions

Using the following data for an unreinforced PCC Pavement slab:■ Design strength f′c = 4,000 psi■ Slab thickness = 12′′■ Standard deviation of f′c obtained from 20 samples = 200 psi■ Ignore any exposure requirement■ Use air-entrained concrete■ Fineness modulus of fine aggregate = 2.60■ Maximum aggregate size = 2′′ and nominal maximum aggregatesize = 11 2′′■ Bulk oven-dry specific gravity of coarse aggregate = 2.6■ Oven-dry rodded density of coarse aggregate = 125 pcfFind the following:a. Required compressive strengthb. w/c ratioc. Coarse aggregate amount (lb/yd3)d. If the w/c ratio is 10% reduced, will the quantity of coarse aggregate increase, decrease or remain the same? Explain your answer.
Using the following data for an unreinforced PCC Pavement slab:■ Design strength f′c = 28 MPa■ Slab thickness = 300 mm■ Standard deviation of f′c obtained from 20 samples = 1.4 MPa■ Ignore any exposure requirement■ Use air-entrained concrete■ Fineness modulus of fine aggregate = 2.60■ Maximum aggregate size = 50 mm and nominal maximum aggregatesize = 37.5 mm■ Bulk oven-dry specific gravity of coarse aggregate = 2.6■ Oven-dry rodded density of coarse aggregate = 2002 kg/m3Find the following:a. Required compressive strengthb. w/c ratioc. Coarse aggregate amount (kg/m3)d. If the w/c ratio is 10% reduced, will the quantity of coarse agg
Using the following data for an unreinforced PCC Pavement slab:■ Design strength f′ c = 28 MPa■ Slab thickness = 300 mm■ Standard deviation of f′ c obtained from 20 samples = 1.4 MPa■ Ignore any exposure requirement■ Use air-entrained concrete■ Fineness modulus of fine aggregate = 2.60■ Maximum aggregate size = 50 mm and nominal maximum aggregatesize = 37.5 mm■ Bulk oven-dry specific gravity of coarse aggregate = 2.6■ Oven-dry rodded density of coarse aggregate = 2002 kg/m3Find the following:a. Required compressive strengthb. w/c ratioc. Coarse aggregate amount (kg/m3)d. If the w/c ratio is 10% reduced, will the quantity of coarse aggregateincrease, decrease or remain the same? Explain your answer.
Using the following data for an unreinforced PCC Pavement slab: ▪ Design Strength f`c = 4000 psi ▪ Slab thickness = 12” ▪ Standard deviation of f`c obtained from 20 samples = 200 psi ▪ Ignore any exposure requirement ▪ Use air entrained concrete ▪ Fineness Modulus of Fine Aggregates = 2.60 ▪ Maximum aggregate Size = 2” and nominal maximum aggregate size 1 ½ “ ▪ Bulk oven-dry specific gravity of Coarse Aggregate = 2.60 ▪ Oven-dry rodded density of coarse aggregate = 125 pcf Find the following: a) Required compressive strength b) Water-Cement Ratio c) Coarse aggregate amount (lb/yd3 ) d) If the w/c ratio is 10% reduced, will the quantity of coarse aggregate increase, decrease or remain the same? Explain your answer.
What is the importance of aborption of aggregate to asphalt concrete? Answer in 3-5 sentences.
Give me right solution... Urgent please A 5 tonne wheel load is applied on a pavement and generates a surface deflection of 0.15 mm. A. If the pavement is 125 mm thick, what is the vertical stress at the top of the subgrade? B. If the equivalent radius of tyre contact is 100 mm and Poisson’s ratio is 0.3, what is the pavement’s modulus of elasticity
What standard PG asphalt binder grade should be selected under the following conditions:a. The seven-day maximum pavement temperature has a mean of 62°C and a minimum pavement temperature of -15°C. (table9.2) b. According to part a, what is your recommendation for 20 million ESALs and 50 km/h speed? (table ESALs) c. For 50 million ESALs and 80 km/h speed. (table ESALs)
An agency uses the following formula to determine pavement condition rating, PCR = 99.3 − 5.51 (5.0-ROUGH) − 1.59 LNALL − 0.221 AVGOUT − 0.0306 LONG − 0.531 TRAN, where we have the following. ROUGH = roughness measured by present serviceability rating (PSR), scale of 0 to 5 LNALL = natural logarithm of alligator cracking, ft per mile AVGOUT = outer wheel path rutting (all locations averaged), 0.01 inch LONG = longitudinal cracking, ft per mile TRAN = transverse cracking, number of cracks per mile And, present serviceability rating is determined as the following. PSR = 5e−0.0051118 · IRI − 0.0016027 A pavement section has the following distress data. IRI = 108 in./mi Alligator cracking = 110 ft/mi Average rutting = 0.20 in. Longitudinal cracks = 130 ft/mi Transverse cracks = 12/mi Determine the current PCR for this section. PCR = Now, assume a new roughness measurement is expected soon. When PCR falls below 60, the section will be scheduled for rehabilitation. Determine the new IRI…
Problem 1: A flexible pavement section is designed using a CBR of 20 for the subgrade. During construction it is found that the subgrade is softer with a CBR of 7. The contractor proposes to place a layer of select fill on top of the subgrade to compensate for this condition. How thick should the select fill layer be if the original pavement section is 8 inches HMA over 12 inches crushed aggregate base over subgrade. Assume a resilient modulus of 15,000 psi for the select fill and clearly describe the design method used to solve this problem as well as any assumptions and results PROBLEM 2: Design a rigid pavement that will last as long as the flexible structure from problem 1
Define the importance of air void content in bituminous pavements?
Using the ACI/PCA tables, what should be the design volume of air of a concrete mixture containing ASTM No. 467 coarse aggregate and used as a concrete pavement in a Bristol, TN? (answer to two decimal places and provide proper units).
Find the quantity of cement, sand and gravel of the concrete pavement 4" thick as shown in Figure 1-10 using class "B" concrete.