Grading Curves for 20mm MSA (Road Note-4, RRL, UK)
Percentage Passing
IS Sieves (mm)
Curve (1)
Curve(2)
Curve(3)
Curve(4)
40
*Curve(5)
100
20
100
100
100
100
100
10
45
55
65
75
72
4.75
30
35
42
48
40
2.36
23
28
35
42
30
1.20
16
21
28
34
25
0 .6 0 0
9
14
21
27
15
0 .3 0 0
2
3
5
12
4
0 .1 5 0
0
0
0
1 .5
0
110 100
100
100
90 80 75 70 65 G N I S S A P %
60 55 50
48 42
42
34
35 28 23
35 30
40 30
27
28
20
21
21 16
10
14 9
12 1.5 0 0.150
0
45
5 3 2 0.300
0.600
1.20
2.36
4.75
10
M i n im im um um Cem en en t Con te ten ts ts an d M ax ax im im um um W /C /C r at at i o f or or di f f er er en en t posu r e wi th th n or or m al al wei gh gh t A gg ggr eg egat e of 20m m N om om i na nal m ax ax i um um Table-1 ex po size as per I S:456-2000 S:456- 2000 Plain Concrete (PCC) Exposure
Min Cement
Reinforced Concrete (RCC) Min Cement
Kg/m
Max Free W/C
Mild
220
Moderate
Minimum grade of Concrete P CC
RCC
Kg/m
Max Free W/C
0. 6
300
0.55
----
M20
250
0. 6
300
0. 5
M15
M20
Severe
260
0. 5
350
0.45
M20
M25
Very Severe
300
0.45
400
0.45
M20
M35
Extreme
300
0. 4
400
0. 4
M25
M40
3
3
Note: Minimum Cement Content is irrespective of grade of Cement Cement
Table-2
Adjus Adjustm tme ents to M inimum Cement ment Conte Contents nts for aggreg regates tes other ther than than 20mm nomi nal maxi mum size as per per I S:456-2000 :456-2000
Nominal Max. Agg. Size (mm)
Adjustments in Minimum Cements in 3
Table- 1 (Kg/m )
10
+40
15
+20
20
+00
20
40
M i n im im um um Cem en en t Con te ten ts ts an d M ax ax im im um um W /C /C r at at i o f or or di f f er er en en t posu r e wi th th n or or m al al wei gh gh t A gg ggr eg egat e of 20m m N om om i na nal m ax ax i um um Table-1 ex po size as per I S:456-2000 S:456- 2000 Plain Concrete (PCC) Exposure
Min Cement
Reinforced Concrete (RCC) Min Cement
Kg/m
Max Free W/C
Mild
220
Moderate
Minimum grade of Concrete P CC
RCC
Kg/m
Max Free W/C
0. 6
300
0.55
----
M20
250
0. 6
300
0. 5
M15
M20
Severe
260
0. 5
350
0.45
M20
M25
Very Severe
300
0.45
400
0.45
M20
M35
Extreme
300
0. 4
400
0. 4
M25
M40
3
3
Note: Minimum Cement Content is irrespective of grade of Cement Cement
Table-2
Adjus Adjustm tme ents to M inimum Cement ment Conte Contents nts for aggreg regates tes other ther than than 20mm nomi nal maxi mum size as per per I S:456-2000 :456-2000
Nominal Max. Agg. Size (mm)
Adjustments in Minimum Cements in 3
Table- 1 (Kg/m )
10
+40
15
+20
20
+00
30
-15
40
-30
posur e Conditi ons: Table-3 Ex posur Mild-
Concrete surface protected against weather or aggressive conditions
Moderate-
Concrete surfaces sheltered from severe rain or freezing whilst wet Concrete continuously under water. Concrete exposed to condensation and rain
Severe-
Concrete exposed to non-aggressive sub-soil/ground water or coastal environment oncre e sur aces expose o severe ra n, a erna rna e we ng an ry ng or occas ona ree reez ng w
s we
Concrete in contact or buried under non-aggressive soil/ground water, completely immersed in sea water
Very Severe Extreme
Concrete surfaces exposed to sea water water spray,corrossive fumes or severe freezing conditions whilst wet Concrete surfaces exposed to abrasive action ,for example machinery, metal tyred vehicles or water carrying solids Concrete surfaces in tidal zone Members in direct contact with liquid /solid aggressive chemicals
M i n im im um um Cem en en t Con te ten ts ts an d M ax ax im im um um W /C /C r at at i o f or or di f f er er en en t posu r e wi th th n or or m al al wei gh gh t A gg ggr eg egat e of 20m m N om om i na nal m ax ax i um um Table-1 ex po size as per I S:456-2000 S:456- 2000 Plain Concrete (PCC) Exposure
Min Cement
Reinforced Concrete (RCC) Min Cement
Kg/m
Max Free W/C
Mild
220
Moderate
Minimum grade of Concrete P CC
RCC
Kg/m
Max Free W/C
0. 6
300
0.55
----
M20
250
0. 6
300
0. 5
M15
M20
Severe
260
0. 5
350
0.45
M20
M25
Very Severe
300
0.45
400
0.45
M20
M35
Extreme
300
0. 4
400
0. 4
M25
M40
3
3
Note: Minimum Cement Content is irrespective of grade of Cement Cement
Table-2
Adjus Adjustm tme ents to M inimum Cement ment Conte Contents nts for aggreg regates tes other ther than than 20mm nomi nal maxi mum size as per per I S:456-2000 :456-2000
Nominal Max. Agg. Size (mm)
Adjustments in Minimum Cements in 3
Table- 1 (Kg/m )
10
+40
15
+20
20
+00
30
-15
40
-30
posur e Conditi ons: Table-3 Ex posur Mild-
Concrete surface protected against weather or aggressive conditions
Moderate-
Concrete surfaces sheltered from severe rain or freezing whilst wet Concrete continuously under water. Concrete exposed to condensation and rain
Severe-
Concrete exposed to non-aggressive sub-soil/ground water or coastal environment oncre e sur aces expose o severe ra n, a erna rna e we ng an ry ng or occas ona ree reez ng w
s we
Concrete in contact or buried under non-aggressive soil/ground water, completely immersed in sea water
Very Severe Extreme
Concrete surfaces exposed to sea water water spray,corrossive fumes or severe freezing conditions whilst wet Concrete surfaces exposed to abrasive action ,for example machinery, metal tyred vehicles or water carrying solids Concrete surfaces in tidal zone Members in direct contact with liquid /solid aggressive chemicals
Table-6: Gradings limi t f or F in e Aggreg Aggregate ate (I S:383-1970 :383-1970) )
IS Sieve
Percentage passing for Z on e-1
Z on e-2
Z on e-3
Z on e-4
10-mm
100
100
100
100
4.75-mm
90-100
90-100
90-100
95-100
2.36-mm
60-95
75-100
85-100
95-100
1.18-mm
30-70
55-90
75-100
90-100
600-micron
15-34
35-59
60-79
80-100
300-micron
5-20
38959
14946
15-50
150-micron
0-10
0-10
0-10
0-15
Table-8 : Degree of Qul i tyContr ol expecte expected d
Very Good
Fresh cement from single source and regular tests, weigh batching of all materilas,aggregate materilas,aggregatess supplied in single sizes, control of aggregate aggregate grading and moisture content, Control of water added, fr equent supervision, regular workability and strength tests, and f ield laboratory facilities
Good
Carefully stored cement and periodic tests, weigh batching of all materials, controlled water, graded aggregate supplied,ocassional supplied,ocassional grading and moisture tests, periodic check of workability and strength, intermittent supervision and and experienced workers
Fair
Proper storage of Cement, Volume batching of all aggregates allowing to bulking of sand, weigh batching of cement, cement, water water content controlled controlled by inspection inspection of mix, mix, and occasional occasional supervision and tests.
Table-9: Recommended value of Standard Deviation IS:10262-1982 Degree of Quality Control
Grade of Concrete Very good
Good
Fair
M-10
2.0
2.3
3.3
M-15
2.5
3.5
4.5
M-20
3.6
4.6
5.6
M-25
4.3
5.0
6.3
M-30
5.0
6.0
7.0
M-35
5.3
6.3
7.3
M-40
5.6
6.6
7.6
M-45
6.0
7.0
8.0
M-50
6.4
7.4
8.4
M-55
6.7
1.7
8.7
M-60
6.8
7.8
8.8
Table-4: Work abil it y for dif ferent pur poses and appropri ate test values Degree of workability
Placing conditions
Section subject to extremely intensive or Extremely Low prolonged vibration; pressure may also be required
Very low
Low
Medium
High
Very high
Nominal MAS (mm)
Compaction factor
Slump (mm)
10
0.65
0 over 20
20
0.68
0
Small sections subject to intensive vibration and large sections to normal vibrations
10
0.75
0
20
0.78
0-10
40
0.78
0-25
Simply reinforced sections with good vibration and large sections to normal vibrations
10
0.83
0-5
20
0.85
10-25
40
0.85
25-50
10
0.9
5-25
20
0.92
25-50
40
0.92
50-100
10
0.95
25-100
20
0.95
50-125
40
0.95
100-175
10
0.97
100-150
Simply reinforced sections with normal vibration and heavily reinforced sections with good vibrations
Heavily reinforced sections with light vibrations
Cast in situ plies or structures with very heavy reinforcement and light /no vibration
Vebe time (s)
7-20
5-10
3-5
2-3
0-2 20
0.97
125-200
40
0.98
>200
Table-5: Maximum size of the aggregate (MSA)
Percentage of Aggregates passing 20mm sieve
Maximum Aggregate Size (MAS)
0-25
40
25-75
30
75-100
20
Table-7: Value of Statistical Constant 't' ( IS:10262-1982)
Accepted proportion of low results
't'
1 in 5
0.84
1 in 10
1.28
1 in 15
1.5
1 in 20
1.65
1 in 40
1.96
1 in 100
2.33
WORKSHEE PROJECT: JOB LOC. Conc. Grade Date:
I. A. B.
C.
D.
E.
F.
II.
III.
IV.
V. VI. A.
B.
VII. A.
B.
C. a.
b. D. a. b.
E. a. b.
F. G. VIII. A. B. C. D. E. IX. A. B. C. D. E. F. G. H. I. J. K.
Design mix Trial Mix Cement W/C Bulkage S/Moisture FA CA-I CA-II Water Slump
I.
A. B. C. D. E. F.
Mix NoConc.
Grade
No. of Cubes Date of Casting Date of testing 7 Day strength a) Cube Weight b)Load c) Comp. Strength 28 Day strength
a) Cube Weight b)Load c) Comp. Strength
I
II
FOR CONCRETE MIXES DESIGN Const. of Br. No 1/1 for PMGSY Project on road no-1 Abutment no-1 on Silchar side apporoach road. M-25 3/12/2007
REQUIREMENTS/PARAMETERS: 2
SPECIFIED MINIMUM STRENGTH(Fck ) kg/cm
300.0
DURABILITY REQUREMENTS
SEVERE
Exposure
0.45
Maximum w/c ratio Minimum cement content
335.0
Minimum Grade of Concrete
M25
CEMENT(TYPE /GRADE)
OPC/53G
Type/Grade Characteristic Strength
2
530.0
kg/cm
E
Cement Grade WORKABILITY OR SLUMP
70
(mm)
HIGH
DEGREE OF WORKABILITY DETAILS OF FINE AGREGATE
Natural
Type (Natural/Mixed) % passing 600 micron sieve
25
% oversize
19 31%
% passing 600 micron sieve *(pure sand) Select Zone
I
%retained on 4.75mm IS Sieve
19%
Specific Gravity
2.96
Dry Loose Bulk Density (kg/lit)
1.77
Bulkage
15%
Surface Moisture
2%
DETAILS OF COARSE AGGREGATE
Crushed
Type
43%
% Passing 20mm Sieve (CA-II) Maximum size of aggregate(MSA) (mm)
30
%Passing On 4.75mm Sieve (CA-I)
9%
Specific Gravity
2.53
Dry Loose Bulk Density(DLBD)-CAI kg/cm
2
1.44
2
1.39
Dry Loose Bulk Density(DLBD)-CAII kg/cm
TARGET MEAN STRENGTH (Fck)
2
kg/cm
Good
Degree of Quality Control 2
Standard Deviation ‘S’ ( N/mm )
6.00
Value Selected
1.65 2
40
Target Mean Strength (N/mm ) WATER TO CEMENT RATIO
W/C Ratio (Figure-A)
0.425
W/C Ratio ( For Durability)
0.45
W/C Ratio (Selected)
0.43
PROPORTION OF FINE AGGREGATE
Maximum Size Of Aggregate(MSA)
30.00
Slump
70.00
W/C selected
0.43
%Passing 600 Mic. IS Sieve
31%
Proportion Of Fine Aggregate PROPORTION OF COARSE AGGREGATE CORRECTI ONS I N AGGREGATE PROPOTI ON
orr ec ons ue o coarse aggrega es n
ne aggrega e
% Passing 4.75mm Sieve % Proportion of Fine Aggregate after correction % Proportion of Coarse aggregate after correction. orr ec ons ue o ne aggrega es n coarse
% passing 4.75mm sieve % proportion of fine aggregate after correction c) % proportion of coarse aggregates after corrections AGGREGATE TO CEM ENT RATI O (A/C): I NPUT f or A/C determi nation:
Maximum size of aggregate(MSA) Type Of Aggregates – FINE -- CA-I -- CA-II W/C ratio selected workability/slump Grading curve no/zone A/C RATIO
for fine aggregate for coarse aggregate AGGREGATE PROPORTION
for fine aggregate
for coarse aggregate A/C PROPORTIONATELY WORK OUT
for fine aggregate for coarse aggregate TOTAL=(a. + b.) A/C CORRECTED FOR SP.GRAVITY
for fine aggregate for coarse aggregate TOTAL=(a. + b.)
A/C CORRECTED FOR FLAKINESS A/C FINAL WEIGH BATCHI NG:
CEMENT (50 KG) WATER =(50KG * W/C) FA
= [ 50KG * A/C (FINAL) * % PROPORTION ]
CA-I
= [ 50KG * A/C (FINAL) * % PROPORTION.]
CA-II
= [ 50KG * A/C(FINAL) * % PROPORTION.]
VOLUMETRIC BATCHI NG:
CEMENT (50 KG) WATER=(50KG * W/C) WATER AFTER CORRECTION DLBD – for FA DLBD - for CA-I DLBD – for CA-II FINE AGGREGATE BULKAGE OF FINE AGG. FINE AGG. AFTER BULKAGE COARSE AGGREGATE – CA-I COASE AGGREGATE- CA-II
Quality shall be the pride of CIVIL ENGINEER
CONCRETE POST MORTEM
`
Average wt. of 15cm Concrete Cubes in K g
8
Concrete Density in Kg/Cu.m
2400
W/C selected
0.45
A/C Final
5.25
Total Constituents Cement Content (Kg)
esult Sheet Remarks of the Result
7 358
RECOMMENDED PROPORTION OF FINE AGGEREGATE FOR % PASSING 600 MICRON IS SIEVE
( As per DOE,UK method) MAS=10mm Free W/C ratio
Slump=(0 mm -10mm)
% Prop. of FA for % passing 600 mic. IS-Sieve
0.3
100% 24.00
80% 28.00
60% 33.50
40% 42.00
15% 51.50
0.4
25.33
29.50
35.25
44.17
54.25
0.5
26.67
31.00
37.00
46.33
57.00
0.6
28.00
32.50
38.75
48.50
59.75
0.7
29.33
34.00
40.50
50.67
62.50
0.8
30.67
35.50
42.25
52.83
65.25
0.9
32.00
37.00
44.00
55.00
68.00
0.45
26.00
30.25
36.13
45.25
55.63
% of FA passing 600 mic. IS Sieve
Proportion of FA for the design mix w.r.to % of FA passing 600 mic. IS Sieve & W/C ratio
See note below
80
70
60
100 % Passing line
50
80% Passing line 60% passing line 40% passing line
40
15% passing line
30
20
10 0.3
0.4
0.5
0.6
0.7
0.8
0.9
RECOMMENDED PROPORTION OF FINE AGGEREGATE FOR % PASSING 600 MICRON IS SIEVE
( As per DOE,UK method) MAS=10mm Slump=(10 mm-30mm) Free W/C ratio
% Prop. of FA for % passing 600 mic. IS-Sieve
0.3
100% 26.00
80% 29.50
60% 35.00
0.4
27.00
31.00
37.00
0.5
28.50
32.50
39.00
0.6
29.50
34.00
40.30
0.7
30.50
35.00
42.00
0.8
32.00
36.50
44.00
0.9
33.00
38.00
46.00
0.45
26.00
30.25
36.13
40%
15%
% of FA passing 600 mic. IS Sieve
Proportion of FA for the design mix w.r.to % of FA passing 600 mic. IS Sieve & W/C ratio
45.25
55.63
See note below
80
70
60
100 % Passing line
50
80% Passing line 60% passing line 40% passing line
40
15% passing line
30
20
10 0.3
0.4
0.5
0.6
0.7
0.8
0.9
Aggregate /Cement ratio by weight Degree of workability Grading number W/C ratio by weight 0.40 0.45 0.50 0.55 0.60 0.65 0.70 0.75 0.80
Very low 1
2 5.6 7.2
Low 3
5 6.4 7.8
4 4.2 4.1 4.9
1 3.2
2
3
Medium 4
1
2
High 3
4
1
2
3
4
SA-1 Aggregate Field Test Observatuion Sheet. (Sample-I) 1. JOB
: LAB Trials
2. TYPE
: Crushed CA-II
3. PHYSICAL INSPECTION
: Sieve Analysis
4. SAMPLE WT. TAKEN (Natural state )
: 4700
gm
5. DRY LOOSE BULK DENSITY
: 1.39
Kg/lit
6. SOURCE
: Gumrah quarry
7. SPECIFIC GRAVITY
: 2.53
IS Sieve
Cumulative Percentage Retained
Retained on each Sieve WT
%
40 mm
0
0
20mm
2670
10 mm
Passing through
Remarks
WT
%
0
4700
100
MAS:30
57
57
2030
43
(25-75)%
2030
43
100
0
0
4700
100
4.75 mm 2.36 mm 1.18 mm 600 micron 300 micron 150 micron passing 150 micron Wt. of sample (total)
8. FINENESS MODULUS
:
-------
SILT CONTENT BY VOLUME
:
NA
% at 3 hrs/2hrs/10min
BY WEIGHT
:
NA
% by wt.
12. DATE OF TESTING
:
7/13/2003
13. TESTED BY
:
MR. K.B.S
9.
10. S.MOISTURE 11. ABSORPTION
14. REMARKS :
LAB INCHARGE
Accepted/acceptable subject to washing & / or sieving/rejected
LAB ENGINEER
SA-2 Aggregate Field Test Observatuion Sheet. (Sample-I) 1. JOB
: LAB Trials
2. TYPE
: Crushed CA-I
3. PHYSICAL INSPECTION
: Sieve Analysis
4. SAMPLE WT. TAKEN (Natural state )
: 4835
gm
5. DRY LOOSE BULK DENSITY
: 1.44
Kg/lit
6. SOURCE
: Gumrah quarry
7. SPECIFIC GRAVITY
: 2.53
WT
%
Cumulative Percentage Retained
40 mm
0
0
20mm
0
10 mm
Retained on each Sieve IS Sieve
Passing through Remarks WT
%
0
4835
100
0
0
4835
100
2665
55
55
2170
45
4.75 mm
1735
36
91
435
9
2.36 mm
435
9
100
0
0
4835
100
Fines present
1.18 mm 600 micron 300 micron 150 micron passing 150 micron Wt. of sample (total) 8. FINENESS MODULUS SILT CONTENT BY 9. VOLUME BY WEIGHT 10. S.MOISTURE 11. ABSORPTION 12. DATE OF TESTING 13. TESTED BY 14. REMARKS
LAB INCHARGE
:
-------
: : : : : :
NA NA
:
% at 3 hrs/2hrs/10min % by wt.
7/13/2003 MR. K.B.S Accepted/acceptable subject to washing & / or sieving/rejected
LAB ENGINEER
Note:
Mix Design for a particular grade can be designed with two type of coarse aggregate (Single sized CA-I, CA-II) or one type with graded aggregate. The Sieve Analaysis under Sr.No-SA-1 & SA-2 are for coarse aggregate of 30 mm & 15mm nominal single sized respectively.However 20 mm & 10 mm nominal single-sized aggregate or graded aggregate of 20mm nominal size (Sr.No-SA-4) instead can be used. In each case above the % passing for a particular IS SIEVE should conform the prescribed grading limit of I S Code. For fine aggregate with higher finer fines and low FM values, suitable proportion of Crusher (Grit + dust ) can be used with trials to increase FM value. The above effort for making design mix (normal) is a guide only and hence user should take every care to do all related test of aggregate as per IS-codes & go for trials and ascertain the target strength achieved before actual use.
SA-4 Aggregate Field Test Observatuion Sheet. (Sample-II) 1. JOB
: LAB Trials
2. TYPE
: Natural River Gravel, (Rounded + Irregular)
3. PHYSICAL INSPECTION
: Sieve Analysis
4. SAMPLE WT. TAKEN (Natural state )
: 2985
gm
5. DRY LOOSE BULK DENSITY
: 1.67
Kg/lit
6. SOURCE
: Gumrah quarry
7. SPECIFIC GRAVITY
: 2.53
IS Sieve
Cumulative Percentage Retained
Retained on each Sieve WT
%
40 mm
0
0
20mm
180
10 mm 4.75 mm
Passing through WT
%
0
2985
100
6
6
2805
94
1985
66
73
820
27
790
26
99
30
1
2165
72.52931
Remarks
MAS:20 (75-100)%
2.36 mm 1.18 mm 600 micron 300 micron 150 micron passing 150 micron Wt. of sample (total)
8. FINENESS MODULUS
:
-------
SILT CONTENT BY VOLUME
:
NA
% at 3 hrs/2hrs/10min
BY WEIGHT
:
NA
% by wt.
12. DATE OF TESTING
:
7/13/2003
13. TESTED BY
:
MR. K.B.S
9.
10. S.MOISTURE 11. ABSORPTION
14. REMARKS :
LAB INCHARGE
Accepted/acceptable subject to washing & / or sieving/rejected
LAB ENGINEER
SA-3 Aggregate Field Test Observatuion Sheet. (Sample-I) 1. JOB
: LAB Trials
2. TYPE
: River Sand (FA)
3. PHYSICAL INSPECTION
: Sieve Analysis
4. SAMPLE WT. TAKEN (Natural state )
: 1000
gm
5. DRY LOOSE BULK DENSITY
: 1.77
Kg/lit
6. SOURCE
: Vaitarna (Mumbai)
7. SPECIFIC GRAVITY
: 2.96
WT
%
Cumulative Percentage Retained
40 mm
0
0
20mm
0
10 mm
Retained on each Sieve IS Sieve
Passing through Remarks WT
%
0
1000
100
0
0
1000
100
55
6
6
945
95
4.75 mm
137
14
19
808
81
2.36 mm
112
11
30
696
70
1.18 mm
218
22
52
478
48
600 micron
230
23
75
248
25
300 micron
170
17
92
78
8
150 micron
68
7
99
10
1
passing 150 micron
10
1
1000
100
Wt. of sample (total) 8. FINENESS MODULUS SILT CONTENT BY 9. VOLUME BY WEIGHT 10. S.MOISTURE 11. ABSORPTION 12. DATE OF TESTING 13. TESTED BY 14. REMARKS
LAB INCHARGE
19% over size
31%* Zone-I
374
:
3.74
: :
5 % at 3 hrs/2hrs/10min ---% by wt.
: :
7/13/2003 MR. K.B.S
:
Accepted/acceptable subject to washing & / or sieving/rejected
LAB ENGINEER
FIG-A: Relation between Free Water-Cement Ratio & Concrete Strength at 28 days for different cement strenghts (IS:10262-1982) 70
2 60
NOTE: 28 days Strength of Cement tested according to IS: 4031-1968 Curve (A,B,C,D,E,F)
F
m m / N , 50 H T G N E40 R T S E T30 E R C N O C20 Y A D 810 2
E D
A 31.9-36.8 N/mm2 (325-375 kg/cm2)
C B 36.8-41.7 N/mm2 (375-425 kg/cm2)
B
C 41.7-46.6 N/mm2 (425-475 kg/cm2)
A
D 46.6-51.5 N/mm2 (475-525 kg/cm2) E 51.5-56.4 N/mm2 (525-625 kg/cm2) F 56.4-61.3 N/mm2 (575-625 kg/cm2)
0
0.30
0.35
0.40
0.45
0.50
0.55
WATER-CEMENT RATIO
0.335 0.635
34.35 12.5
39.25 14.5
44.15 16.5
49.05 18
53.95 19.5
58.85 22
0.60
0.65
