Page Contents
1. Mix stipulation for ingredients of concrete

 Grade of Concrete : M60

 Type of Cement : OPC 53 grade confirming to IS 269

 Maximum Nominal Size Aggregate : 20 mm

 Minimum Cement content : 400Kg/cum

 Maximum Water Cement Ratio : 0.4

 Workability : 150 ± 25 mm (slump)

 Exposure Condition : Moderate for RCC

 Method of Concrete Placing : Pumping or Bucket

 Degree of Supervision : Good

 Type of Aggregate : Crushed angular Aggregate

 Chemical admixture type : Super plasticizers Confirming IS 9103:1999
2. Material Properties

 Cement : Ultratech OPC 53 grade confirming to IS 269

 Specific Gravity of cement : 3.15

 Cement : Ultratech OPC 53 grade confirming to IS 269

 JSWGGBFS Confirming to IS 12089
 Specific Gravity of GGBFS: 2.91
 Chemical Admixture : FOSROC Auramix 400

 Specific Gravity of Admixture : 1.096

 JSWGGBFS Confirming to IS 12089

 Specific Gravity

 Coarse aggregate

 20mm : 2.66

 12.5mm : 2.64

 Ratio of aggregate: 20mm10% & 12.5mm90%

 Coarse aggregate

 Fine aggregate

 Crushed stone aggregate : 2.59

 Fine aggregate

 Water: 1

 Specific Gravity

 Water Absorption

 Coarse aggregate

 20mm : 0.29%

 12.5mm : 0.36%

 Coarse aggregate

 Fine aggregate

 Crushed stone aggregate : 2.88%

 Fine aggregate

 Free Surface Moisture

 Fine aggregate : Nil

 Coarse aggregate: Nil

 Free Surface Moisture

 Sieve Analysis

 Coarse aggregate:

 Sieve Analysis

 Water Absorption
IS Seive Sizes  % Passing  IS Requirement as per IS 383 Table 7  Ratio  Combined 100%  Confirming to IS 383 table 7  
Single Sized  Graded  10%  90%  
20 mm  12.5 mm  20 mm  12.5 mm  12.5 mm  20 mm  12.5 mm  
20  91.93  100  85100  100  100  9.19  90.00  99.19  90100  
12.5  0  98.78  –  85100  90100  0.00  88.90  88.90  –  
10  0.44  52.08  020  0 – 45  40 – 85  0.04  46.87  46.92  2555  
4.75  0.2  0.64  05  010  0 – 10  0.02  0.576  0.60  010  
PAN  0  0  –  –  –  0  0  0.00 

 Fine Aggregate: Confirming to grading Zone II of table 4 of IS 383 Note: as per field trials for pumpable concrete fine aggregate should pass zone II; According to IS 383 clause No. 31.2.2 allows to use crushed stone sand as fine aggregate for concrete .According to IS 3832016 for crushed stone sand, the permeassible limit on 150 micron IS sieve is increased to20%.
IS Seive Sizes  % Passing  Specification  
C Sand  IS 383 Zone II  
4.75  100  90100  
2.36  94.17  75100  
1.18  66.34  5590  
600  47.31  3559  
300  27.38  830  
150  11.22  020 
IS Seive Sizes  100%  100%  100%  5.3%  47.7%  47%  Combined Passing  Specification 
20mm  12.5mm  C Sand  20mm  12.5mm  C Sand  minmax  
40  100  100  100  5.3  47.7  47.00  100  100100 
20  91.93  100  100  4.87  47.7  47.00  99.57  95100 
4.75  0  0.64  100  0  0.31  47.00  47.31  3050 
0.6  0  0  47.31  0  0  22.24  22.24  1035 
0.15  0  0  11.22  0  0  5.2734  5.27  06 
3. Target Mean Strength and Mix Proportioning

 As per MORTH the Target Mean Strength for M60 Grade = 73Mpa
4. Target Mean Strength and Mix Proportioning

 As per technical specification max Water/Cement + Binder = 0.4
5. Selection of water/Cement Ratio (W/C)
Ref Tab 2 , IS 10262 , Maximum water content per cum for 20mm Aggregate = 186 litre for 50 mm slump
= 186 + (0.12 * 186) (add 3% for every 25 mm increase )
= 208.32 lit
Based on trials with super plasticizers, water content reduced by 15%,hence the arrived water content = 177.07lit, So Let us add water 177 lit
6. Cementious content Calculation
WaterCementitious Ratio = 0.33
Cementious content (Cement OPC 53 + GGBFS) = 536
Say Cementitious content = 540 kg/m3
Cement = 390 kg/m3
Based on experience and lab trials,GGBS =150kg/m3 (Taking GGBS 27.77%)
Based on experience and lab trials, Based on experience and lab trials, super plasticizer = 0.67 %
7. Calculation Aggregate content Calculation
Ref Tab 3 of IS 10262 , for Sand Zone II , volume of coarse aggregate
per unit vol of total aggregate for 0.5 watercement ratio = 0.62
Adjust for W/c ratio : Add @ 0.01 for every decrease in 0.05= 0.034
Therefore , corrected proportion = 0.654
Adjust for pumpability , i.e decrese by 10% = 0.59 %
Based on experience Considering Volume of coarse aggregate = 0.53
Therefore, Volume of Fine aggregate = 0.47
8. Mix volume Calculation per cubic meter of concrete
a) Volume of concrete = 1 m3 b) Volume of cement = (Mass of cement /specific gravity of cement) × 1000 =390/(3.15×1000)= 0.124 m3 c) Volume of GGBFS=(Mass of GGBFS/specific gravity of GGBFS )× 1000=(150/2.91)x1000=0.0515 d) Volume of water = (Mass of water /specific gravity of water)× 1000 = 0.177 m3 e) Volume of admixture = (Mass of admixture /specific gravity of admixture)× 1000 = (540×0.67)/(100×1.096×1000)=0.0033 m3 f) Volume of all in aggregate =[a(b+c+d+e)] =1(0.124+0.0515+0.177+0.0033)=0.6442= Say 0.644 m3 g) Mass of coarse aggregate(CA) 1) 20 mm = f × volume of CA × sp. gravity × % of 20mm × 1000 = 0.644*0.53*2.66*0.1*1000= 90.791 kg/m3, Say 91 kg/m3 2) 12 mm = f× volume of CA × sp. gravity × % of 12mm × 1000 = 0.644*0.53*2.64*0.9*1000 = 810.976 kg/m3, Say 811 kg/m3 g) Mass of Fine aggregate = f × volume of FA × sp. gravity × 1000 0.644*0.47*2.59*1000 = 783.941 kg/m3 Say 784 kg/m39. Details of Mix Design

 cement = 390 kg
 GGBFS =150 kg

 20mm = 91 kg

 12mm = 811 kg

 Crushed stone sand = 784 kg

 Chemical admixture = 3.62 kg

 Free Water = 177 kg

 WaterCement Ratio = 0.33
 Concrete density = 2406 kg/m3