Design a concrete mix according to the following conditions: Design Specifications Concrete ramp (not reinforced)Slab thickness =270 mmDesign strength (fc) = 25.5 MPaStandard deviation s= 1.86 MPa on 200 specimensEnvironment = Severe exposure to freeze-thaw and de-icing chemicalsSlump = 50 mm Materials AvailableCement:Type GU; specific gravity 3.15Admixture:Air entraining admixture 8 ml/1% air/100 kg cement .Coarse Aggregate:Nominal maximum size = 37.5 mmType = Crushed stoneBulk oven-dry specific gravity = 2.63Absorption = 2.1%Oven-dry rodded density = 1755 kg/m3Moisture content = 1.5%Fine AggregateType = Natural sandBulk oven-dry specific gravity = 2.55Absorption = 3.1%Moisture content = 4.3%Fineness modulus = 2.40

All the design calculations and specifications are based on ASCE codes. For 50mm slump and 37.5mm…

Answered: Design a concrete mix according to the…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Design a concrete mix according to the following conditions:

Design Specifications

Concrete ramp (not reinforced)
Slab thickness =270 mm
Design strength (f_c) = 25.5 MPa
Standard deviation s= 1.86 MPa on 200 specimens
Environment = Severe exposure to freeze-thaw and de-icing chemicals
Slump = 50 mm

Materials Available

Cement:
- Type GU; specific gravity 3.15
Admixture:
- Air entraining admixture 8 ml/1% air/100 kg cement .
Coarse Aggregate:
- Nominal maximum size = 37.5 mm
- Type = Crushed stone
- Bulk oven-dry specific gravity = 2.63
- Absorption = 2.1%
- Oven-dry rodded density = 1755 kg/m³
- Moisture content = 1.5%
Fine Aggregate
- Type = Natural sand
- Bulk oven-dry specific gravity = 2.55
- Absorption = 3.1%
- Moisture content = 4.3%
- Fineness modulus = 2.40

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