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Marketing

 

1
Introduction:
 

In recent time, considerable amount of construction activities are taking place in Bangladesh both in public and private sectors. Government is taking initiative to implement megaproject like Bridge, Metrorail, Sea Port, Tunnel under River, Nuclear Power Plant, upgradation of National Highway into four lanes etc. Aggregates are the major construction materials of these construction projects. Major part of the aggregates drive from igneous and metamorphic rock both local and foreign sources. Maddhapara Granite Mine, a govt. owner underground mine, is only source of igneous rock i.e granite aggregates in the country having production capacity 1.65 million Metric Tons per annum.

   
2
Igneous and Sedimentary Rock:
 

Rock is a natural substance composed of solid crystals of different minerals that have been fused together into a solid lump.  Igneous and Sedimentary Rock are the main source rock of aggregates.

   
 

Igneous Rock:
Igneous rocks are formed when magma (molten rock deep within the earth) cools and hardens. Sometimes the magma cools inside the earth, and other times it erupts onto the surface from volcanoes (in this case, it is called lava). About 64.7% of the Earth's crust by volume consists of igneous rocks; making it the most plentiful category. Of these, 66% are basalts and gabbros, 16% are granite, and 17% granodiorites and diorites. Among the igneous rock, good properties of granite make it the most popular building material. It is the best aggregate for high-grade concrete.

   
 

Sedimentary Rock:
Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material. Together, all these particles are called sediment. Gradually, the sediment transported through river/ stream and accumulates in layers and over a long period of time hardens into rock. Generally, sedimentary rock is fairly soft and may break apart or crumble easily. You can often see sand, pebbles, or stones in the rock, and it is usually the only type that contains fossils.

   
3
Sources of construction aggregates in Bangladesh:
 

Bangladesh is occupying most part of the Bengal Delta having very thick sedimentary cover. Main source of construction aggregates is sedimentary rock but government developed an underground mine (Maddhapara Granite Mine) for high quality aggregates from igneous rock. Unfortunately, the country fulfill their most demand from imported rock both igneous and sedimentary rock.         
                Local Source:     a. Maddhapara Granite Mine (Igneous Rock)
                                          b. Sylhet (Sedimentary Rock)
                                          c. Panchagar (Sedimentary Rock)
                Foreign Source : a. India
                                         b. Bhutan
                                         c. Indonesia
                                         d. China

   
4
Quality of Maddhapara Rock:
  a. Physical and Engineering Properties of Maddhapara Rock (Crushed Stone) (Statement of test results of Maddhapara Rock conducted by BRTC, BUET, Dhaka)
Sl No.

Name of Test/Specification

Test Result of different years

Acceptable Range

2003

2013

1

Bulk Specific Gravity

2.80

2.76

1.60

2

Unit Weight

1550 kg/m3

1500 kg/m3

1120 kg/m3

3

Water Absorption

0.60%

0.12%

0.20%-4.00%

4

LA-Abrasion Value

23.80%

28.00%

30.00%-50.00%

5

Aggregate Impact Value (AIV)

23.00%

25.00%

25.00%-30.00%

6

Aggregate Crushing Value (ACV)

21.00%

23.00%

25.00%-30.00%

7

10% Fines Value (FV)

200KN

140KN

>125KN

8

Flakiness Index

14.00%

44.00%

<45.00%

9

Elongation Index

25.00%

41.00%

-

10

Coating and Stripping Test (Estimated Coating Area)

95.00%

Above 95.00%

-

11

% Loss in Na2SO4 Soundness

0.49%

0.34%

<12.00%

12

Average Sulphate Content

0.03%

-

<2.50%

13

Average Chloride Content

0.003%

-

0.1%-0.3%

14

Clay Lump & Friable Particles

-

0.04%

-

15

Moh’s hardness- 6.5 (Test Conducted by Geological Survey of Bangladesh)

   
  b. Potential Alkali-Silica Reactivity Test:

Test from United Kingdom

Name of Test

:

Potential Alkali-Silica Reactivity of Granite Aggregate

Test Conducted by

:

QED Independent Testing & Consultancy Limited, Bucknalls Lane, Garston, Watford, UK 

Site

:

Maddhapara, Granite Mine

Date of Test

:

10 December. 2014 -13 January, 2015

Date of Report

:

13 January, 2015

Test Procedure

:

The sample was prepared and analyzed in accordance with the chemical method cited in ASTM C289-2007. The soluble silica was determined gravimetrically.

Result

:

 

 

Our Sample Ref.

Client’s Sample Ref.

Location

Dissolved Silica (Sc)

Reduction in Alkalinity

12712

100.2014

Not relevant

7.22 mmol/L

23.3 mmol/L

Comment

:

The sample was considered to be innocuous based on the test results obtained.

 

Test from Singapore

Name of Test

:

Potential Alkali-Silica Reactivity of Granite Aggregate

Test Conducted by

:

ADMATERIALS TECHNOLOGIES PTE LTD

Site

:

Maddhapara, Granite Mine

Date of Test

:

11 November, 2014

Date of Report

:

14 November, 2014

Test Procedure

:

The sample was prepared and analyzed in accordance with the chemical method cited in ASTM C289-2007.

Result

:

 

 

Our Sample Ref.

Client’s Sample Ref.

Location

Dissolved Silica (Sc)

Reduction in Alkalinity

-

-

-

3 mmol/L

18 mmol/L

Comment

:

The sample tested can be considered innocuous.

   
 

c. Specification for Physical and Engineering Properties (Road and Rail)

SL No.

Name of Test

ASTM D-693 standard for crushed aggregate of macadam pavement (ASTM 1992)

ASTM D-1139 standard for crushed aggregate of macadam pavement (ASTM 1992)

Road note 31 standard for aggregate for asphalt concrete (TRL)

Road Materials and standards study Bangladesh (Roads and Highways 1994)

Crushed Stone Ballast for Bangladesh Railway

Maddhapara crushed stone

1

Los Angeles Abrasion (LAA) ASTM C535

<50 (B.C.)
<40 (S.C.)

<40

<40 (W.C.)
<50 (Other)

30-50 (W.C.)

<35

28

2

Aggregate Impact Value (AIV) BS812

 

 

<25

 

 

25

3

Aggregate Crushing Value (ACV) BS812

 

 

<25

25-30

 

23

4

10% Fines Value (TFV) BS812

 

 

 

>125

 

140

5

Flakiness Index (FI) BS812

 

 

<45

20-25

 

22 (small size)
44 (large size)

6

Elongation Index (EI) BS812

 

 

 

 

 

41 (small size)
7 (large size)

7

Coating & Striping Test

 

 

 

 

 

Above 95%

8

% loss in Sodium Sulphate Soundness test ASTMC88

<20

<12

<12

 

<8

0.34

9

Bulk Specific Gravity BS812

 

 

 

 

>260

2.755

10

%Water Absorption BS812

 

 

<2

 

<1.5

0.12

11

Unit Weight Kg/m3 (Loose & Compacted)

 

>1120

 

 

 

1360 (loose)
1500 (compacted)

12

% Clay Lump & Friable Particles

 

 

 

 

<2

0.04

13

% Materials finer than #200 sieve

 

 

 

 

<1

0.16

   
 

d. Specification for Physical and Engineering Properties (Cement Concrete)

SL No.

Name of Test

ASTM C33 standard for concrete aggregates (ASTM 1988)

ACI suggested typical range of concrete aggregate properties (ACI 221R-2-1994)

AASHTO M-80 standard for cement concrete aggregate (AASHTO 1993)

Maddhapara crushed stone

1

Los Angeles Abrasion (LAA) ASTM C535

50

15-50

<50

28

2

Aggregate Impact Value (AIV) BS812

 

 

 

25

3

Aggregate Crushing Value (ACV) BS812

 

 

 

23

4

10% Fines Value (TFV) BS812

 

 

 

140

5

Flakiness Index (FI) BS812

 

 

 

22 (small size)
44 (large size)

6

Elongation Index (EI) BS812

 

 

 

41 (small size)
7 (large size)

7

Coating & Striping Test

 

 

 

Above 95%

8

% loss in Sodium Sulphate Soundness test ASTMC88

<12

1-12

<12

0.34

9

Bulk Specific Gravity BS812

 

1.6-3.2

 

2.755

10

%Water Absorption BS812

 

0.2-4.0

 

0.12

11

Unit Weight Kg/m3 (Loose & Compacted)

>1120

 

 

1360 (loose)
1500 (compacted)

   
5 Compressive Strength of Cement Concrete:
 

a. Cement Concrete Mixed Design

Test from Bangladesh

Name of Test

:

Compressive Strength [ASTM C39]

Test Conducted by

:

Bureau of Research Testing & Consultation, BUET, Dhaka 

Site

:

Maddhapara, Granite Mine

Date of Test

:

30 June , 2015

Date of Report

:

30 June , 2015

Test Procedure

:

Concrete Cylinder Casting & Testing for a Set of 6 Nos.

Mixture

:

Water/Cement: 0.27; Cement: 544kg (Super Fresh-OPC); Water: 147kg; Coarse Sand: 641kg (FM=2.65); Maddhapara Hard Rock (CA); 1133kg (5~10mm: 340kg; 10-20mm: 793kg); Superplasticizer (MEHS 247): 5.4kg.

Result

:

 

 

Sl No.

Date of Casting

Specimen Designation/Frog Mark

Specimen Area

Maximum Load

Crushing Strength

Average Crushing Strength

Mode of Failure

 

 

 

(sq. in)

(Ib)

(psi)

 

 

1

02/06/2015
(28 days test)

H1

12.42

137,692

11,086

10250 psi

(70.5 MPa)

(721 kg/cm2)

Combined

2

H1

12.42

116,184

9,355

Combined

3

H1

12.42

128,184

10,321

Combined

 

 

Test from Bangladesh

Name of Test

:

Compressive Strength [ASTM C39]

Test Conducted by

:

Bureau of Research Testing & Consultation, BUET, Dhaka 

Site

:

Maddhapara, Granite Mine

Date of Test

:

09 June , 2015

Date of Report

:

14 June , 2015

Test Procedure

:

Concrete Cylinder Casting & Testing for a Set of 6 Nos.

Mixture

:

Water/Cement: 0.27; Cement: 544kg (Super Fresh-OPC); Water: 147kg; Coarse Sand: 641kg (FM=2.65); Maddhapara Hard Rock (CA); 1133kg (5~10mm: 340kg; 10-20mm: 793kg); Superplasticizer (MEHS 247): 5.4kg.

Result

:

 

 

Sl No.

Date of Casting

Specimen Designation/Frog Mark

Specimen Area

Maximum Load

Crushing Strength

Average Crushing Strength

Mode of Failure

 

 

 

(sq. in)

(Ib)

(psi)

 

 

1

02/06/2015
(7 days test)

H1

12.42

117,543

9,464

9600 psi

(66 MPa)

(675 kg/cm2)

Combined

2

H1

12.42

128,636

10,357

Combined

3

H1

12.42

111,657

8,990

Combined

 

 

Test from Bangladesh

Name of Test

:

Compressive Strength of Trail Mix Concrete Cylinders

Test Conducted by

:

Bureau of Research Testing & Consultation, BUET, Dhaka 

Site

:

Maddhapara, Granite Mine

Date of Casting

:

25 June , 2012

Date of Report

:

14 October , 2012

Test Procedure

:

Mix Design of Concrete (ACI 211.4R~93)

Target Mean Strength

:

38.0 MPa (Class 30)

Mixture

:

Brand Name of Cement: Holcim (OPC)
w/c: 0.46
Name of Admixture: Conplast SP430
Coarse Aggregate: Maddhapara Rock Crushed Stone

Result

:

 

 

 

3-days strength

7-days strength

28-days strength

Sl No.

Crushing Strength (psi)

Crushing Strength (MPa)

Type of Failure

Crushing Strength (psi)

Crushing Strength (MPa)

Type of Failure

Crushing Strength (psi)

Crushing Strength (MPa)

Type of Failure

1

-

-

-

4580

31.6

Combined

5700

39.3

Combined

2

 

-

-

4430

30.5

Combined

5920

40.8

Combined

3

-

-

-

4490

30.9

Combined

6040

41.6

Combined

Mean

-

-

-

4500

31.0

-

5900

40.6

-

 

 

 

 

 

 

 

 

 

 

 

28-Jun-12

 

2-Jul-12

82%

23-Jul-12

107%

Materials requirement for 1 m3 of fresh concrete:

 

Water:

175

Kg

Cement:

380

Kg

Fine Aggregate (SSD):

754

Kg

Coarse Aggregate (SSD):

1131

Kg

Admixture:

0.80

Lt/100kg

Mix proportion (Volume Basis)

C:SD:CA = 1:2.41 : 3.39

 

Slump

150

Mm

 

 

 

Test from Bangladesh

Name of Test

:

Compressive Strength of Trail Mix Concrete Cylinders

Test Conducted by

:

Bureau of Research Testing & Consultation, BUET, Dhaka 

Site

:

Maddhapara, Granite Mine

Date of Casting

:

25 January , 2012

Date of Report

:

14 October , 2012

Test Procedure

:

Mix Design of Concrete (ACI 211.4R~93)

Target Mean Strength

:

38.0 MPa (Class 30)

Mixture

:

Brand Name of Cement: Holcim (OPC)
w/c: 0.42
Name of Admixture: Conplast SP430
Coarse Aggregate: Maddhapara Rock Crushed Stone

Result

:

 

 

 

3-days strength

7-days strength

28-days strength

Sl No.

Crushing Strength (psi)

Crushing Strength (MPa)

Type of Failure

Crushing Strength (psi)

Crushing Strength (MPa)

Type of Failure

Crushing Strength (psi)

Crushing Strength (MPa)

Type of Failure

1

-

-

-

5340

36.8

Combined

6450

44.4

Combined

2

 

-

-

5140

35.4

Combined

6340

43.7

Combined

3

-

-

-

5680

39.1

Combined

6550

45.1

Combined

Mean

-

-

-

5400

37.2

-

6450

44.4

-

 

 

 

 

 

 

 

 

 

 

 

28-Jan-12

 

2-Jul-12

98%

23-Jul-12

117%

Materials requirement for 1 m3 of fresh concrete:

 

Water:

170

Kg

Cement:

405

Kg

Fine Aggregate (SSD):

750

Kg

Coarse Aggregate (SSD):

1125

Kg

Admixture:

0.90

Lt/100kg

Mix proportion (Volume Basis)

C:SD:CA = 1:2.25 : 3.17

 

Slump

65

mm

 

 

   
6 Size and Price of Maddhapara Rock:
 

Category

Size

Price

Uses

Boulder

>250mm

US$ 28/ton

River Training & Embankment

Crushed Stone

60-80 mm

US$ 25/ton

 

40-60 mm

US$ 30/ton

Railway

20-40 mm

US$ 31/ton

Road

5-20 mm

US$ 32/ton

Road, Bridge & Heavy Construction

Stone Dust
<5 mm

US$ 07/ton

Ingredient of cement

Loading Charge (Truck/Rail Wagon)

  • Stone Dust/Crushed Stone/ Assorted Rock- 60Tk/Ton
  • Boulder- 80Tk/Ton
   
7 Sales Procedure:
  MGMCL sales rock in two ways
 
  Customer must follow the steps for purchase of rock
 
  • Customer has to submit a demand letter mentioning the size and quality of stone to General Manger (Marketing), MGMCL.
  • MGMCL’s sales department will issue an allotment letter to customer mentioning product price and loading charge in BDT.
  • Customer has to deposit the money through cash/DD/pay order.
  • MGMCL’s sales department will issue a delivery order.
  • Customer has to engage an authorized representative to receive the stones.
  • Customer has to hiring truck or rail wagon on his own management for carrying the stones to reach his destination.
8 Mode of Transportation:
 
  • By Truck/other vehicles
  • By Train
9 Major User:
 
  • Bangladesh Railway
  • Roads & Highways Department
  • Water Development Board
  • LGED
  • Public Works Department
10

Structure/ Establishment Built by Maddhapara Rock:

 
  • Bangabandhu International Convention Centre
  • Shahjalal  International Airport
  • HatirJheel Project, Kuril Flyover
  • Rokeya University, Rangpur
  • Medical College of Dinajpur, Rangpur & Bogra
  • Railway and Different Structure of Bangladesh Railway
  • River Training Works of Bangabandhu Bridge
11

Contract Person of MGMCL:

 

Md. Abu Taleb Farazi, General Manager (Marketing) Additional Charge
Phone   :               +88 - 05222 - 56431       
Mobile  :               +88-01730332207

   
 

 

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