Design the concrete mix according to the following conditions: Design Environment Caissons for Bridge pier crossing...

70.2K

Verified Solution

Question

Civil Engineering

Design the concrete mix according to the following conditions:Design Environment Caissons for Bridge pier crossing to the OuterBankers, NC Required design strength=4800psi
Minimum dimension = 12 in.
Minimum space between rebars = 2.5 in.
Minimum cover over rebars = 2.5 in.
Statistical data indicate a standard deviation of compressivestrength of 250 psi is expected (more than 30 samples).
Only air entrained is allowed. Available Materials Airentrainer: Manufacture specification is 0.15 fl oz/1% air/100 lbcement.
Aggregate: 1 in. nominal maximum size, crushed stone
Bulk oven-dry specific gravity=2.45,absorption=2.5%
Oven-dry rodded density=125pcf
Moisture content=1.5%
Fine aggregate: Natural sand
Bulk oven-dry specific gravity=2.61,absorption=3.4%
Moisture content=3.8%
Fineness modulus=2.81
1. Calculate the strength requirements.(psi)
2. Part 2: Determine the water to cement ratio.
3: Calculate the volume of coarse aggregate (lb/yd^3)
4: Find the air content percentage (%)
5: Determine the workability.

Answer & Explanation Solved by verified expert

3.9 Ratings (697 Votes)

Ans 1 According to ACI 318 required compressive strength fcr fcr fc 1200 where fc specified compressive strength 4800 psi fcr 4800 1200 fcr 6000 psi Hence required strength is See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member