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Concrete Batch Adjustment

The document is a worksheet for adjusting concrete batch weights due to actual moisture contents of aggregates. It provides data on the moisture content and absorption rates of various aggregate sizes used in a C40 concrete mix. Based on this data, the free moisture and corrected batch weights are calculated for each ingredient in a 10 cubic meter batch. The total correction reduces the required water amount by 43.29 kilograms. The worksheet was prepared by Advanced Construction Technology Services for a batch mixed on July 8, 2013.

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Lloyd R. Ponce
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638 views2 pages

Concrete Batch Adjustment

The document is a worksheet for adjusting concrete batch weights due to actual moisture contents of aggregates. It provides data on the moisture content and absorption rates of various aggregate sizes used in a C40 concrete mix. Based on this data, the free moisture and corrected batch weights are calculated for each ingredient in a 10 cubic meter batch. The total correction reduces the required water amount by 43.29 kilograms. The worksheet was prepared by Advanced Construction Technology Services for a batch mixed on July 8, 2013.

Uploaded by

Lloyd R. Ponce
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
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Advanced Construction Tecnology Services

WORKSHEET FOR CONCRETE BATCH WEIGHT ADJUSTMENT


(Correction due to actual moisture contents of aggregates)

Grade of Concrete:

C40 7% MS w/o Fly Ash

Plant Name/Number:

Al Bustan (Plant 01)

Date:
Batch Volume:

8-Jul-13
10

cu.m

Moisture Content
Description
Wt. of Can (g)
Wet Sample+can (g)

3/4"
a
b

1/2"

3/8"

Sand

903.7

857.8

16.2

831

4024.1
4015.9

3342.3
3330

3203.8
3187.6

1572.6
1537.1

Dry Sample+can (g)

Water(g)

d = b-c

8.2

12.3

16.2

35.5

Dry Wt.(g)

e = c-a

3112.2

2472.2

3171.4

706.1

Moisture Content (%)

f = d/e x 100

0.26

0.50

0.51

5.03

Batch Weight Adjustment

INGREDIENTS
m3

Per

Cement
Micro Silica
Fly Ash
Water
19 mm

Free
Moisture

Water content Corrected


except
Batch Wt per
absorption
cu.m.

SSD Weight

Moisture
Content

Absorption

Kgs.

Kgs.

Kgs.

d=b-c

e=(d x a)/100

f=a+e
3,120.0
1,010.0
7,660.0

Total Corrected Batch


Wt

312
22
111
144.2
769

0.33

0.70

-0.33

-2.54

312.0
101.0
766.0

12.5 mm
9.5 mm
Sand

0
362
700

0.00
0.49
6.80

0.00
0.80
1.50

0.00
-0.49
6.80

0.00
-1.77
47.60

0.0
360.0
748.0

0.0
3,600.0
7,480.0

Admixture 1(SP432MS)
Admixture 2 (___)

11
0

11.00
0.00

110.0
0.0

Total

43.29

Water Correction = Mixing Water(design) - excess water other than absorption

Cheked by:
Prepared by:

Date:
Time:

8-Jul-13
9:30AM

Advanced Construction Tecnology Services


WORKSHEET FOR CONCRETE BATCH WEIGHT ADJUSTMENT
(Correction due to actual moisture contents of aggregates)

Grade of Concrete:

PCC C35/25mm

Plant Name/Number:

Al Mabani KAIA Plant 01

Date:
Batch Volume:

6-Jul-13
6

cu.m

Moisture Content
Description
Wt. of Can (g)
Wet Sample+can (g)

Dry Sample+can (g)

Water(g)

d = b-c

Dry Wt.(g)

e = c-a

Moisture Content (%)

f = d/e x 100

1"
740.3
2383
2380.1
2.9
1639.8

3/4"
683.1
1972.4
1969
3.4
1285.9

1/2"
775.5
2320.6
2315.1
5.5
1539.6

Sand
773.3
1510.7
1505.4
5.3
732.1

0.18

0.26

0.36

0.72

Batch Weight Adjustment

INGREDIENTS
m3

Per

Water content Corrected


except
Batch Wt per
absorption cu.m.

SSD Weight

Moisture
Content

Absorption

Free
Moisture

Kgs.

Kgs.

Kgs.

d=b-c

e=(d x a)/100

f=a+e
370.0
138.0
329.0

2,220.0
828.0
1,974.0

384.0
385.0
765.0
8.20
4.00

2,304.0
2,310.0
4,590.0
49.2
24.0

Cement
Micro Silica
Fly Ash
Water
25 mm

370
0
0
131
330

19 mm
12.5 mm
Sand
Admixture 1(CF 110)
Admixture 2 (Gel A)

385
385
771
8.2
4

0.18

0.40

-0.22

-0.73

0.26
0.35
0.72

0.40
0.40
1.50

-0.14
-0.05
-0.78

-0.54
-0.19
-6.01

Total

-7.47

Water Correction = Mixing Water(design) - excess water other than absorption

Cheked by:
Prepared by:

Date:
Time:

7/6/213
9:15AM

Total Corrected Batch


Wt

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