7.8 Design the concrete mix according to the following conditions:Design EnvironmentBuilding frameRequired design strengthMinimum dimension27.6 MPa||150 mmMinimum space between rebarMinimum cover over rebarStatistical data indicate a standard deviation of compressive strength of2.1 MPa is expected (more than 30 samples).Only air entrainer is allowed.40 mm= 40 mmAvailable MaterialsAir entrainer: Manufacture specification 6.3 ml/1% air/100 kg cement.Coarse aggregate: 19 mm nominal maximum size, river gravel(rounded)Bulk oven-dry specific gravityOven-dry rodded densityMoisture content = 2.5%2.55, Absorption= 0.3%= 1761 kg/m³Fine aggregate: Natural sandBulk oven-dry specific gravity2.659, Absorption0.5%Moisture content =2%Fineness modulus2.47%3D

Calculate required strength Assume S = 2.1 Mpa Calculate the value of fcrfcr = fc + 1.34S= 30.4…

7.8 Design the concrete mix according to the following conditions: Design Environment Building frame Required design strength Minimum dimension = 27.6 MPa = 150 mm Minimum space between rebar Minimum cover over rebar = 40 mm = 40 mm Statistical data indicate a standard deviation of compressive strength of 2.1 MPa is expected (more than 30 samples). Only air entrainer is allowed. Available Materials Air entrainer: Manufacture specification 6.3 ml/1% air/100 kg cement.

7.8 Design the concrete mix according to the following conditions: Design Environment Building frame Required design strength Minimum dimension = 27.6 MPa = 150 mm Minimum space between rebar Minimum cover over rebar = 40 mm = 40 mm Statistical data indicate a standard deviation of compressive strength of 2.1 MPa is expected (more than 30 samples). Only air entrainer is allowed. Available Materials Air entrainer: Manufacture specification 6.3 ml/1% air/100 kg cement.

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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Concept explainers

Pavement Management

Pavement management is the process of planning the maintenance and repair of a roadway network or other paved infrastructure to improve road conditions throughout the network. It is also used on runways and airports. Every highway superintendent undertakes walkway management. Traffic management includes the cost of living cycles in a systematic way of repairing minor and major roads and reconstruction projects. The needs of the entire network and budget estimates are considered before the projects are undertaken, as the cost of data collection can change significantly. Pavement management incorporates many of the features and functions required to maintain the quality of the paved material as well as to ensure that the entire road network can sustain itself at the required levels. Although pedestrian management involves the life cycle of commuting from planning to maintenance of any transport infrastructure, road asset management, and road maintenance planning is primarily aimed at road infrastructure.

Question

7.8 Design the concrete mix according to the following conditions:
Design Environment
Building frame
Required design strength
Minimum dimension
27.6 MPa
||
150 mm
Minimum space between rebar
Minimum cover over rebar
Statistical data indicate a standard deviation of compressive strength of
2.1 MPa is expected (more than 30 samples).
Only air entrainer is allowed.
40 mm
= 40 mm
Available Materials
Air entrainer: Manufacture specification 6.3 ml/1% air/100 kg cement.
Coarse aggregate: 19 mm nominal maximum size, river gravel
(rounded)
Bulk oven-dry specific gravity
Oven-dry rodded density
Moisture content = 2.5%
2.55, Absorption
= 0.3%
= 1761 kg/m³
Fine aggregate: Natural sand
Bulk oven-dry specific gravity
2.659, Absorption
0.5%
Moisture content =
2%
Fineness modulus
2.47
%3D

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