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Sta. Clara Intl. Corporation

USEFUL ACI TABLES INSELECTION OF

PROPORTIONS FORNORMAL CONCRETE

Doc. Code : ML-TQM-04-01

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Eff. Date : Mar. 11, 2009

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Project / Plant : Location :

1. ACI Table A 1.5.2.1 Recommended Slumps for Various Types of Construction

Types of ConstructionSlump , cm

Maximum * Minimum

Reinforced foundation walls and footings 8 2

Plain footings, caissons, and substructure walls 8 2

Beams and reinforced walls 10 2

Buildings and columns 10 2

Pavements and Slab 8 2

Heavy mass concrete 8 2

* - May be increased 2 cm for methods of consolidation other than vibrations

2. ACI Table A1.5.2.3 Approximate Mixing Water Requirements for Different Slumps andMaximum Sizes of Aggregates *

Slump, cm Water, kg/m of concrete for indicated maximum sizes of

aggregates in mm

10 12.5 20 25 40 50 70 150

Non-air entrained concrete

3 to 5 205 200 185 180 160 155 145 125

8 to 10 225 215 200 195 175 170 160 140

15 to 18 240 230 210 205 185 180 170 -

Approximate amount of entrapped air in non air-entrained concrete, %

3 2.5 2 1.5 1 0.5 0.3 0.2

Air-entrained concrete

3 to 5 130 175 165 160 155 145 135 120

8 to 10 200 190 180 175 160 155 150 135

15 to 18 215 205 190 185 170 165 160 -

Recommended average total air content, % 8 7 6 5 4.5 4 3.5 3* - These quantities of mixing water are for use in computing cement factors for trial batches. They

are maxima for reasonably well-shaped angular coarse aggregate graded within limits of acceptedSpecifications.

- The slump values for concrete containing aggregate larger than 40mm are based on slump tests

After removal of particles larger than 40mm by wet-screening.

3. ACI Table A1.5.2.4(a) RELATIONSHIPS BETWEEN WATER-CEMENT RATIO AND

COMPRESSIVE STRENGTH OF CONCRETECompressive Strength at 28 days,

kgf/cmWater-Cement Ratio, by Weight

Non-air entrained concrete Air-entrained Concrete

450 0.38 -

400 0.43 -350 0.48 0.40

300 0.55 0.46

250 0.62 0.53

200 0.70 0.61

150 0.80 0.71

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Sta. Clara Intl. Corporation

USEFUL ACI TABLES INSELECTION OF

PROPORTIONS FORNORMAL CONCRETE

Doc. Code : ML-TQM-04-01

Rev. No. : 0

Eff. Date : Mar. 11, 2009

Page : 2 of 3

Values are estimated average strengths for concrete containing not more than the percentage of air shown in

Table A1.5.2.3. For constant water-cement ratio, the strength of concrete is reduced as the air content is

increased.Strength is based on 15 x 30cm cylinders moist-cured 28 days at 231.7C in accordance with Section 9(b) of ASTM C31

for Making and Curing Concrete Compression and Flexure Test Specimens in the Field. Cube strengths will be higher by

approximately 20 per cent

Relationship assumes maximum size of aggregate about 0 to 30 mm; for a given source, strength produced by a given

water-cement ratio will increase as maximum size decreases; see Sections 3.4 and 5.3.2

4. ACI Table A1.5.2.4(b) MAXIMUM PERMISSIBLE WATER-CONTENT RATIOS FOR CONCRETEIN SEVERE EXPOSURES*

Type of Structure Structure wet continuously orfrequently and exposed to

freezing and thawing

Structure exposed to seawater or sulfates

Thin sections (railings, curbs, sills,ledges, ornamental work) and sectionswith less than 3 cm cover over steel.

0.45 0.40

All other structures 0.50 0.45

* Based on the report of ACI Committee 201, Durability of Concrete in Service, previously citedConcrete should also be air-entrained

If sulfate resisting cement (Type II or Type V of ASTM C150) is used, permissible water-cement ratio may be increased

by 0.05.

5. ACI Table A1.5.2.6 VOLUME OF COARSE AGGREGATE PER UNIT OF VOLUME OFCONCRETE

Maximum Size ofAggregate, mm. Volume of rodded-coarse aggregate

per unit of concrete for different finenessmoduli of sand

2.40 2.60 2.80 3.00

10 0.50 0.48 0.46 0.44

12.5 0.59 0.57 0.55 0.53

20 0.66 0.64 0.62 0.60

25 0.71 0.69 0.67 0.65

40 0.76 0.74 0.72 0.70

50 0.78 0.76 0.74 0.7270 0.81 0.79 0.77 0.75

150 0.87 0.85 0.83 0.81

Volumes are based on aggregates in dry-rodded condition as described in ASTM C29 for Unit Weight Of

AggregatesThese volumes are selected from empirical relationships to produce concrete with a degree of workability

suitable for usual reinforced construction. For less workable concrete such as required for concrete pavementconstruction they may be increased about 10 per cent. For more workable concrete, such as may sometimes berequired when placement is to be by pumping, they may be reduced up to 10 per cent.

Fineness modulus of sand = sum of ratios (cumulative) retained o sieves with square openings of 0.19, 0.297,

0.595, 1.19, 2.38 and 4.76mm.

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Sta. Clara Intl. Corporation

USEFUL ACI TABLES INSELECTION OF

PROPORTIONS FORNORMAL CONCRETE

Doc. Code : ML-TQM-04-01

Rev. No. : 0

Eff. Date : Mar. 11, 2009

Page : 3 of 3

6. ACI Table A1.5.2.7.1 FIRST ESTIMATE OF WEIGHT OF FRESH CONCRETE

Maximum Size of Aggregate, mm. First estimate of concrete weight , kg/m

Non-air-entrained concrete Air-entrained concrete

10 2285 2190

12.5 2315 2235

20 2355 2280

25 2375 2315

40 2420 235550 2445 2375

70 2465 2400

150 2505 2435

Values calculated by Eq. (A1..5.2.7) for concrete of medium richness (30 kg. of cement per m) and medium

slump with aggregate specific gravity of 2.7. Water requirements based on values of 8 to 10 cm slump in TableA1.5.2.3. If desired, the estimate of weight may be refined as follows if necessary information is available: for

each 5 kg difference in mixing water from the Table A1.5.2.3 values for 8 to 10 cm slump, correct the weight perm 8 kg in the opposite direction; for each 20 kg difference in cement from 330 kg, correct the weight per m3 kg

in the same direction; for each 0.1 by which aggregate specific gravity deviates from 2.7, correct the concreteweight 70 kg in the same direction

.