Monday, January 30, 2023
  • About Us
  • Contact Us
  • Privacy & Policy
Civil Solution
  • Home
  • STUDY MATERIAL
    • All
    • e-Books
    Curing of concrete

    Curing of Concrete

    CONCRETE-TECHNOLOGY

    CONCRETE TECHNOLOGY THEORY AND PRACTICE – by M.S. Shetty Free Download pdf

  • SOFTWARES
    • All
    • Architectural Software
    • Civil Software
    GEO5

    Geotechnical Software – GEO5

    etabs

    ETABS (Extended Tri-dimensional Analysis of Building Structures)

    staad.pro

    STAAD.PRO – Structural Analysis Software

    What is REVIT- Building Information Modelling (BIM)?

    What is REVIT- Building Information Modelling (BIM)?

    AutoCAD2020

    AUTOCAD

    software

    TOP CIVIL ENGINEERING SOFTWARES

  • Construction
    fly-ash-bricks

    Fly Ash Lime-Bricks

    AAC Block advantages

    Advantages And Disadvantages of AAC Blocks

    AAC blocks

    AAC Blocks : Autoclave Aerated Concrete Blocks

    Curing of concrete

    Curing of Concrete

    nominal mix concrete

    How to Calculate Quantities of Ingredient in 1cum of Nominal Mix Concrete?

    concrete__mix design

    Procedure for Concrete Mix Design of M30 Concrete

    concrete mix

    Concrete Mix Design, Procedure and Its Advantages

    water cement ratio

    What is Water Cement Ratio?

    workability of concrete

    What is Workability of Concrete? Factors and Measuring Test.

  • Building Material
    fly-ash-bricks

    Fly Ash Lime-Bricks

    AAC Block advantages

    Advantages And Disadvantages of AAC Blocks

    AAC blocks

    AAC Blocks : Autoclave Aerated Concrete Blocks

    Curing of concrete

    Curing of Concrete

    nominal mix concrete

    How to Calculate Quantities of Ingredient in 1cum of Nominal Mix Concrete?

    concrete__mix design

    Procedure for Concrete Mix Design of M30 Concrete

    concrete mix

    Concrete Mix Design, Procedure and Its Advantages

    water cement ratio

    What is Water Cement Ratio?

    CONCRETE-TECHNOLOGY

    CONCRETE TECHNOLOGY THEORY AND PRACTICE – by M.S. Shetty Free Download pdf

No Result
View All Result
Civil Solution
  • Home
  • STUDY MATERIAL
    • All
    • e-Books
    Curing of concrete

    Curing of Concrete

    CONCRETE-TECHNOLOGY

    CONCRETE TECHNOLOGY THEORY AND PRACTICE – by M.S. Shetty Free Download pdf

  • SOFTWARES
    • All
    • Architectural Software
    • Civil Software
    GEO5

    Geotechnical Software – GEO5

    etabs

    ETABS (Extended Tri-dimensional Analysis of Building Structures)

    staad.pro

    STAAD.PRO – Structural Analysis Software

    What is REVIT- Building Information Modelling (BIM)?

    What is REVIT- Building Information Modelling (BIM)?

    AutoCAD2020

    AUTOCAD

    software

    TOP CIVIL ENGINEERING SOFTWARES

  • Construction
    fly-ash-bricks

    Fly Ash Lime-Bricks

    AAC Block advantages

    Advantages And Disadvantages of AAC Blocks

    AAC blocks

    AAC Blocks : Autoclave Aerated Concrete Blocks

    Curing of concrete

    Curing of Concrete

    nominal mix concrete

    How to Calculate Quantities of Ingredient in 1cum of Nominal Mix Concrete?

    concrete__mix design

    Procedure for Concrete Mix Design of M30 Concrete

    concrete mix

    Concrete Mix Design, Procedure and Its Advantages

    water cement ratio

    What is Water Cement Ratio?

    workability of concrete

    What is Workability of Concrete? Factors and Measuring Test.

  • Building Material
    fly-ash-bricks

    Fly Ash Lime-Bricks

    AAC Block advantages

    Advantages And Disadvantages of AAC Blocks

    AAC blocks

    AAC Blocks : Autoclave Aerated Concrete Blocks

    Curing of concrete

    Curing of Concrete

    nominal mix concrete

    How to Calculate Quantities of Ingredient in 1cum of Nominal Mix Concrete?

    concrete__mix design

    Procedure for Concrete Mix Design of M30 Concrete

    concrete mix

    Concrete Mix Design, Procedure and Its Advantages

    water cement ratio

    What is Water Cement Ratio?

    CONCRETE-TECHNOLOGY

    CONCRETE TECHNOLOGY THEORY AND PRACTICE – by M.S. Shetty Free Download pdf

No Result
View All Result
Civil Solution
No Result
View All Result

Procedure for Concrete Mix Design of M30 Concrete

Aadi by Aadi
January 23, 2020
in Building Material, Construction
0 0
0

A.    Concrete Mix Design Stipulation

  1. Grade designation: — M30
  2. Type of cement: — OPC 43 grade
  3. Maximum nominal size of aggregate: — 20mm
  4. Minimum cement content: — 320 Kg ……….…. (From Table 5 of IS 456:2000)
  5. Maximum water-cement ratio: — 0.45 ………… (From Table 5 of IS 456:2000)
  6. Degree of Workability: — 100mm slump / 0.92 compacting factor
  7. Exposure condition: — Sever
  8. Method of concrete placing: — Pumping
  9. Degree of supervision: — Good
  10. Type of aggregate: — Crushed angular aggregate
  11. Maximum cement content: — 450 kg/m3
  12. Chemical admixture type: — Superplasticizer

B. Test Data of Material (to be Determined in the Laboratory)

  1. Specific gravity of cement: — 3.15
  2. Compressive strength of cement at 7 days: — Satisfies the requirement of IS: 269–1989
  3. (i). Specific gravity of coarse aggregates: — 2.60 (ii). Specific gravity of fine aggregates: — 2.60
  4. Water absorption (i). Coarse aggregate: — 0.50% (ii). Fine aggregate: — 1%
  5. Sieve analysis: — Conforming to grading Zone III (Table 2 & 4, IS: 383–1970)
  6. Free (surface) moisture

                1. Coarse aggregate: — Null

                2. Fine aggregate: — 2%

Now Start calculation procedure —

Step 1 — Determination of Target Strength—

The target mean strength for specified characteristic cube strength is

Target mean strength f’ck= fck + kσ

Where,

fck = characteristic strength below which certain percentage of test results are expected to fall.

 k = Himsworth constant for 5% risk factor is 1.65.

σ = Standard deviation is 5.0 M30 (from table 8 of IS:456-2000)

Target mean strength f’ck= 30 + 1.65×5 = 38.25MPa

Step 2 — Selection of water / cement ratio—

Based on experience, water-cement ratio required for the target mean strength of 38.25 MPa is 0.40

Maximum water-cement ratio for Mild exposure condition = 0.45 (From Table 5 of IS 456 -2000)

0.40<0.45, hence OK.

Step 3 — Selection of Water and sand Content—

From Table 2 of IS:10262 – 2009, for 20 mm maximum size aggregate and sand grading for zone II –

maximum water content =186 litre (for 25 to 50 mm slump range)

sand content = 35% of total aggregate.

Table for Correction required in water and sand content

Change in Parameters (per Standard reference condition) Departure Correction in Water Content Correction in Sand Content
For decrease in water-cement ratio by (0.60–0.40) that is 0.20 0.20 – –2.0
Slump (25-50 mm) to 100 mm 50 (3/25) x 50 = +6 –
For sand conforming to Zone III of Table 4, IS: 383–1970 – – –1.5
Total – +6 –3.5

For change in water-cement ratio, workability degree / compacting factor, and sand belonging to Zone III

Estimated water content for 100 mm slump =186+6/100 x 186

                                                                      = 186 + 11 = 197 litre

As superplasticizer is used as admixture, the water content can be reduced up 20% or more.

Based on trials with superplasticizer water content reduction of 29 percent has been achieved. Hence, the arrived water content =197 x 0.71 =140 litre

Therefore, required sand content as percentage of total aggregate by absolute volume = 35 – 3.5    = 31.5%

Step 4 — Selection of Cement Content

Water-cement ratio = 0.40

Corrected water content = 197kg / m3

Cement content = 140/0.40 =350 kg/m3

From Table 5 of IS 456, minimum cement content for ‘severe’ exposure condition = 320 kg/m3

350 kg/m3 > 320 kg/m3, hence, cement content adopted = 350 kg/m3.

Step 5: Estimation of Coarse Aggregate proportion-

From Table 3 of IS 10262- 2009,

For Nominal maximum size of aggregate = 20 mm,

Volume of coarse aggregate for water-cement ratio of 0.50 =0.64 (Corresponding Zone III)

In this case w/c = 0.4 lower by 0.10. So, the proportion of volume of coarse aggregate is increased by 0.02 (at the rate of ± 0.01 for every ± 0.05 change in water-cement ratio). For pump or worked around congested reinforcing steel required more workable concrete the coarse aggregate proportion may be reduced up to 10%.

Hence,

Volume of coarse aggregate per unit volume of total aggregate = 0.64 x 90% = 0.576

Volume of fine aggregate = 1 – 0.576 = 0.424

Step 6: Estimation of the mix ingredients

a) Volume of concrete = 1 m3

b) Volume of water

c) Volume of cement

d) Volume of chemical admixture (superplasticizer)

@2.0% by mass of cementitious material = 350 × 2% = 7 kg/m3

e) Volume of total aggregates = a – (b + c)

                                                         = 1-(0.111 +0.140+0.007)

                                                       = 0.742 m3

 f) Mass of coarse aggregates = e × Volume of coarse aggregate × Specific gravity of coarse aggregate × 1000

                                                        =0.742 x 0.576 × 2.84 × 1000 = 1213.79 kg/m3

g) Mass of fine aggregates = e x volume of fine aggregate × Specific gravity of fine aggregate × 1000

                                                   = 0.742 × 0.424 × 2.64 × 1000 = 830.56 kg/m3

MIX PROPORTIONS FOR TRIAL NUMBER 1

  • Cement = 350kg/m3
  • Water = 140 kg/m3
  • Chemical Admixture = 7 kg/m3
  • Fine aggregates = 830.56 kg/m3
  • Coarse aggregate = 1215.43 kg/m3
  • W/c = 0.4

TRIAL -1 preparing of concrete in lab, to check its properties will satisfy desire strength durability & economy.

Mass of ingredients required for casting of 4 numbers cubes (15cm×15cm×15cm) for trial – 1 will be calculated, assuming 25% wastage.

Volume of concrete required for 4 cubes = 4 x (0.153 x1.25) = 0.016878 m3

Cement = (350 x 0.016878) kg/m3 = 5.91 kg

Water = (140 x 0.016878) kg/m3 = 2.36 kg

Coarse aggregate = (1215.43 x 0.016878) kg/m3 = 20.51 kg

Fine aggregates = (831.68 x 0.016878) kg/m3 = 14.04 kg

A summary of all the trial mixes is given in the following Table.

Recommended mix proportion of ingredients for grade of concrete M30 obtain from test result –

From obtained test result for target strength 38.25 N/mm2 (> 34 N/mm2 , OK) we get,

  1. Water-cement ratio = 0.38
  2. Water content = 145 kg/m3 (0.145 m3)
  3. Cement content = (145/0.38) = 381.58 kg/m3 (0.121 m3)
  4. Superplasticizer = 7.63 kg/m3 (0.0067 m3)

Volume of total aggregate = 1 – [0.121+ 0.145+0.0067] = 0.7273 m3

A reduction of w/c – 0.02 so, increase of coarse aggregate fraction by 0.004.

Coarse aggregate fraction = 0.576 +.004 = 0.580

Percentage of FA = (1 – 0.580) x 100 = 42%

5. Mass of CA = 0.7273 x 0.580 x 2.84 x 1000 = 1198.00 kg/m3

6. Mass of FA = 0.7273 x 0.420 x 2.64 x 1000 = 806.43 kg/m3

Free Download WordPress Themes
Premium WordPress Themes Download
Download Premium WordPress Themes Free
Download Best WordPress Themes Free Download
free online course
Tags: Calculation of mix designConcrete MixConcrete Mix DesignConcrete Mix Design of M30Procedure for Concrete Mix Design
ShareTweetShare
Aadi

Aadi

Experienced Site Civil Engineer with a demonstrated history of working in the civil engineering industry. Skilled in AutoCAD, Revit, STAAD-Pro, Adobe Photoshop, and Civil Engineering. Strong engineering professional with a Bachelor of Engineering (B.E.) focused in Civil Engineering from BIT MESRA.

Next Post
nominal mix concrete

How to Calculate Quantities of Ingredient in 1cum of Nominal Mix Concrete?

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

  • Trending
  • Comments
  • Latest
concrete__mix design

Procedure for Concrete Mix Design of M30 Concrete

January 23, 2020
nominal mix concrete

How to Calculate Quantities of Ingredient in 1cum of Nominal Mix Concrete?

January 25, 2020
fly-ash-bricks

Fly Ash Lime-Bricks

August 27, 2020
GEO5

Geotechnical Software – GEO5

January 5, 2020
AAC blocks

AAC Blocks : Autoclave Aerated Concrete Blocks

3
What is REVIT- Building Information Modelling (BIM)?

What is REVIT- Building Information Modelling (BIM)?

2
fly-ash-bricks

Fly Ash Lime-Bricks

1
staad.pro

STAAD.PRO – Structural Analysis Software

0
fly-ash-bricks

Fly Ash Lime-Bricks

August 27, 2020
AAC Block advantages

Advantages And Disadvantages of AAC Blocks

August 19, 2020
AAC blocks

AAC Blocks : Autoclave Aerated Concrete Blocks

August 15, 2020
Curing of concrete

Curing of Concrete

August 19, 2020
Civil Solution

We write post about civil engineering software, tools and study materials for civil students.

Read more

Categories

  • Architectural Software
  • Building Material
  • Civil Engineering
  • Civil Software
  • Construction
  • e-Books
  • SOFTWARES
  • STUDY MATERIAL
Facebook Twitter Instagram LinkedIn Youtube

Recent News

fly-ash-bricks

Fly Ash Lime-Bricks

August 27, 2020
AAC Block advantages

Advantages And Disadvantages of AAC Blocks

August 19, 2020

© 2019 civilsolution.in

No Result
View All Result
  • Home
  • STUDY MATERIAL
  • SOFTWARES
  • Construction
  • Building Material

© 2019 civilsolution.in

Login to your account below

Forgotten Password?

Fill the forms bellow to register

All fields are required. Log In

Retrieve your password

Please enter your username or email address to reset your password.

Log In