Skip to content

Civil Engineering

  • Home
  • Videos
  • CONCRETE
  • Highway
  • Railway
  • WasteWater
  • BMC
    • Building Construction
  • soil
  • Irrigation

8 Factors Influencing the Choice of Mix Proportions

Posted on 25th June 20191st March 2022 By Malay Sautya

Contents

  • 1 8 Factors Influencing the Choice of Mix Proportions
    • 1.1 1. Grade Designation
    • 1.2 2. Types and Grade of Cement
    • 1.3 3. Maximum Nominal Size of Aggregates
    • 1.4 4. Grading of Combined Aggregate
    • 1.5 5. Water-Cement Ratio
    • 1.6 6. Workability
    • 1.7 7. Durability
    • 1.8 8. Quality Control

8 Factors Influencing the Choice of Mix Proportions

According to IS 456-2000 and IS 1343-1980, the designs of the concrete mix should be based on the following factors:

Factors Influencing the Choice of Mix Proportions of concrete

1. Grade Designation

The grade designation gives characteristic compressive strength requirements of concrete. It is the major factor influencing the mix design. 

The concrete mix has to be designed for a target mean compressive strength which is somewhat higher than the characteristic compressive strength.

2. Types and Grade of Cement

The rate of development of compressive strength of concrete depends upon the type & grade of cement used. The choice of the type of cement depends upon the requirements of performance at hand. 

Where very high compressive strength is required, portland cement of grade 43 and 53 will be found suitable.

3. Maximum Nominal Size of Aggregates

The workability and compressive strength of concrete greatly depend upon the maximum size of aggregates. The workability increases with an increase in the maximum size of aggregate.  

On the other hand use of the large maximum size of aggregate, requires a smaller quantity of cement for a particular water-cement ratio. However, the smaller size aggregates provide a large surface area for bonding with the mortar matrix which increases the compressive strength.

4. Grading of Combined Aggregate

The grading of combined aggregate i.e, the relative proportion of the fine & coarse aggregates in a concrete mix is one of the important factor affecting the strength and workability of concrete. For dense concrete, it is essential that the coarse and fine aggregates be well grade.

5. Water-Cement Ratio

At a given age and under normal temperature, the compressive strength of concrete depends primarily on the water-cement ratio. Lower the water-cement ratio, greater is the compressive strength & vice-versa.

6. Workability

Insufficient workability of concrete may liable for incomplete compaction of concrete which ultimately affects the strength, durability & surface finish of the concrete.

7. Durability

The durability of concrete is its ability to resist deterioration due to weathering action, chemical attack, abrasion etc. The requirements of durability are achieved by restricting the minimum cement content & the maximum water-cement ratio.

Read More:

  •  10 Way To Prevent of Concrete Deterioration
  •  Factors Affecting The Durability of Concrete

From the consideration of permeability, the water-cement ratio is usually restricted to 0.45 to 0.55. For a given water-cement ratio, the cement content should correspond to the required workability considering the placing conditions and the concentration of reinforcement.  

In addition, the cement content is chosen to ensure sufficient alkalinity to provide a passive environment against corrosion of steel.

8. Quality Control

The strength of concrete may vary from batch to batch over a period of time.    The source of variation in the strength of concrete may be considered due to the variation in the quality of materials, mix proportion, mixing equipment, supervision & workmanship. The factor controlling this variation is quality control. The degree of control is ultimately evaluated by the variation in test results.

Read More: 

Quality Control of Concrete And Their Purpose 

Types of Concrete

CONCRETE

Post navigation

Previous Post: 4 Difference Between Air-entrained and Lightweight Concrete
Next Post: Causes of Deterioration of Concrete

Related Posts

  • What is Admixture and Additive – Their Uses, Functions, And Types CONCRETE
  • How to Reduce Bleeding in Concrete CONCRETE
  • Grade Of Concrete CONCRETE
  • Factors Affecting The Durability of Concrete CONCRETE
  • 10 Way To Prevent of Concrete Deterioration CONCRETE
  • Lightweight Concrete – Their Advantages and Uses CONCRETE
  • Segregation of Concrete – 4 Causes and 5 Prevention CONCRETE
  • Slump Testing of Concrete CONCRETE
  • Method of Test For Bleeding of Concrete CONCRETE
  • Deleterious Material in Aggregates BMC

Categories

  • Highway engineering
  • Railway Engineering
  • BMC
  • WasteWater
  • soil
  • CONCRETE
  • Building Construction
  • Irrigation Engineering
  • Hydraulic Structure
  • water
  • Cement
  • Foundation Engineering
  • Building Parts
  • Aggregate
  • Mathematical Example
  • Tunnels
  • Survey Engineering
  • PAVEMENT DESIGN
  • Hydrology
  • PAVEMENT DESIGN – MCQ
  • Building Material
  • Floors
  • Highway Engineering – MCQ
  • HYDROLOGY M.C.Q
  • Engineering Geology – M.C.Q
  • Railway Engineering – MCQ
  • Water Supply – MCQ
  • Building Materials – MCQ
  • Soil Engineering – MCQ
  • Irrigation Engineering – MCQ
  • 10 Types of Roads Classification in India(Urban & Non-Urban Road)
  • 3 Characteristics of Sewage – Physical, Chemical and Biological Characteristics
  • TYPES OF RAILS – Double Headed, Bull Headed and Flat Footed Rails
  • 6 Types of Classification of Gradient – Ruling, Limiting, Exceptional, Minimum, Average and Floating Gradient
  • Railway Gauge – || Definition || Types || Factor Affecting || Advantages of Uniform Gauge ||
  • 8 Different Types of Cement Test || Building Materials & Construction
  • What is Creep of Rails? Causes of Creep of Rails – Railway Engineering
  • Slump Testing of Concrete
  • History of Road Development in India
  • 100+ All Traffic Signs or Road Safety Signs in India as per IRC

Top Posts & Pages

  • How To Calculate True Bearing From Magnetic Bearing - || Rules and Example||
    How To Calculate True Bearing From Magnetic Bearing - || Rules and Example||
  • 7 Shapes of Tunnels
    7 Shapes of Tunnels
  • 11 Factors affecting For Selection of Type of Bridge
    11 Factors affecting For Selection of Type of Bridge
  • TYPES OF RAILS - Double Headed, Bull Headed and Flat Footed Rails
    TYPES OF RAILS - Double Headed, Bull Headed and Flat Footed Rails
  • 12 Basic Principles of Building Planning
    12 Basic Principles of Building Planning
  • Advantages and Disadvantages of Traffic Signals
    Advantages and Disadvantages of Traffic Signals
  • Factors Affecting The Quantity Of Sanitary Sewage
    Factors Affecting The Quantity Of Sanitary Sewage
  • Rainfall Intensity And Their Formula
    Rainfall Intensity And Their Formula
  • 8 Factors Affecting Infiltration Capacity
    8 Factors Affecting Infiltration Capacity
  • Swedish Circle Method For Analyzing The Slope Stability
    Swedish Circle Method For Analyzing The Slope Stability
  • Grid Iron System- And their Advantages & Disadvantages WasteWater
  • 3 Difference Between Biochemical (B.O.D) and Chemical (C.O.D) Oxygen Demand ENV
  • 6 Functions of Fixture And Fastenings in Railway Railway Engineering
  • Oxidation Ditch -Wastewater Engineering WasteWater
  • Length of Valley Curve Design Method Highway engineering
  • 8 Advantages and Disadvantages of Flat Roof Over Pitched Roof BMC
  • Water Quality - MCQ || Water Supply Engineering ||
    Water Quality – MCQ || Water Supply Engineering || Water Supply - MCQ
  • Engineering Costs & Estimation - MCQ || Economics for Engineers ||
    Engineering Costs & Estimation – MCQ || Economics for Engineers || ECONOMICS FOR ENGINEERS - MCQ

Recent Posts

  • Top 10 Tallest Buildings and Structures in Japan
  • Top 10 Tallest Buildings in Australia as of 2022
  • Advantages and Disadvantages of Mud houses
  • Top 10 Tallest Buildings in Germany as of 2022
  • Home
  • About us
  • Contact

Popular Post

  • 16 Different Types of Windows used in Buildings
  • Different Types of Stairs Used in Building Construction
  • 18 Different Component Parts of an Arch
  • 12 Basic Principles of Building Planning
  • 15 Advantages and Disadvantages of Sprinkler Irrigation Method

Copyright © 2022 Civil Engineering.

Powered by PressBook News WordPress theme