Effect of intensity of compaction on crushing strength of indigenous baked clay

Lakho, Nawab Ali; Zardari, Muhammad Auchar; Memon, Faisal Ahmed

doi:10.7603/s40632-016-0011-5

Cited by 7 publications

(7 citation statements)

References 12 publications

(10 reference statements)

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“…The modulus of rupture depends upon compressive strength of a material. As stated above, the compressive strength of baked clay can be improved by the application of compaction at the time of casting [1]. Since the modulus of rupture of normal weight concrete is usually taken as 15% of its compressive strength.…”

Section: Modulus Of Rupturementioning

confidence: 99%

“…Compressive strength of baked clay is dependent upon compaction at the time of casting [1], and firing temperature [2]- [4]. But, the bricks are generally cast without compaction and are fired at 1000˚C in a kiln.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have been conducted to explore potential of baked clay beams as a substitute of Reinforced Cement Concrete, see e.g., references [5]- [12]. Compressive strength as high as 38 MPa, was achieved when these clay blocks compacted at 7.2 MPa were fired at the temperature of 1000˚C [1]. The average compressive strength of fired bricks manufactured in Sindh, Pakistan is about 12 MPa [13].…”

Section: Introductionmentioning

confidence: 99%

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Suitability of Large Sized Compacted Baked Clay Blocks as a Walling Material

Lakho¹,

Zardari²

2016

ENG

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Some disadvantages associated with conventional brick masonry are: high cost of construction, lower compressive strength and less durability. In order to resolve these problems, a new technique of constructing walls using large size baked clay blocks is introduced. For this purpose, clay blocks of size 150 mm × 300 mm × 1980 mm were cast at a pressure of 6 MPa, and fired at a temperature of 700˚C. In this paper, compressive strength and tensile strength of baked clay were investigated in order to find its suitability as a walling material for low cost houses. Cubes of 150 mm sides were tested in compression and the beams were tested in flexure. The results showed that compressive strength of baked clay cubes was found to be 10 MPa and tensile strength, in terms of modulus of rupture, was found to be 2.3 MPa. Since the baked clay blocks are larger in size than traditional bricks, it is inferred that the blocks could be used as a cheaper and stronger walling material.

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Section: Modulus Of Rupturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Suitability of Large Sized Compacted Baked Clay Blocks as a Walling Material

Lakho¹,

Zardari²

2016

ENG

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“…The target compressive strength of normal concrete was taken as 20 MPa [4]. The studies suggest that in addition to firing temperature [5][6][7][8][9], compression applied during casting of beams [10] plays an important role in increasing compressive strength of baked clay. The structural properties of RBC beams were investigated in terms of compressive strength [11], modulus of rupture [12], and load versus deflection response under static loading [13][14][15][16][17][18][19] and impact loading [20,21].…”

Section: Introductionmentioning

confidence: 99%

Flexural Behaviour of Partially Prestressed Reinforced Baked Clay Beams

Zardari

Lakho

2019

Teh. vjesn.

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To provide shelter for slum dwellers of Pakistan, Reinforced Baked Clay (RBC) seems to be a possible option to replace Reinforced Cement Concrete (RCC) whose ingredients, i.e., aggregates and cement are costly in plains of the country. However, shear failure is a major problem observed in RBC beams. In addition, it is difficult to provide shear reinforcement in RBC beams, because it is time consuming and it does not contribute to resist shear stresses. In this study, a technique is presented to overcome problem of shear failure of RBC beams. The RBC beams were partially prestressed by post tensioning up to 60% of yield stress and were tested in three points loading. The results show that the RBC beams (i) exhibited flexural mode of failure without shear reinforcement, (ii) carried as much load as control RCC beam. This implies that by partial prestressing of RBC beams, there could be no need of shear reinforcement. This will result in saving of time and money.

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“…Previous studies report that the compressive strength of baked clay cubes is comparable to that of normal concrete [2]- [7]. The compressive strength of baked clay cubes depends on compaction at the time of casting [8] and firing temperature [9]- [11].…”

Section: Introductionmentioning

confidence: 99%

Relation between Compressive Strength of Baked Clay Cubes and Cylinders

Lakho¹,

Zardari²

2016

ENG

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Reinforced Baked Clay (RBC) seems to be potential alternative of Reinforced Cement Concrete (RCC) for construction of low cost houses. In order to utilize RBC as a construction material for buildings, it is necessary to understand compression behaviour of baked clay. In this paper, relation between cube crushing strength and cylinder strength of baked clay is presented. For this purpose, clay beams were cast in a mould and compacted at a pressure of 6 MPa. The clay beams were dried and fired in a kiln at a temperature of 900˚C. Cubes of 150 mm size were sawed from a baked clay beam. Cylinders of 150 mm diameter and 300 mm height were cut, from another baked clay beam, using core cutter machine. Both the cubes and cylinders were tested for compressive strength in Universal Testing Machine. The results showed that the cube crushing strength of baked clay was 25 MPa and the ratio of the compressive strength of the cylinders and the cubes was found to be 0.6. Suggestions for improvement of compressive strength of baked clay cylinders are also discussed.

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Effect of intensity of compaction on crushing strength of indigenous baked clay

Cited by 7 publications

References 12 publications

Suitability of Large Sized Compacted Baked Clay Blocks as a Walling Material

Suitability of Large Sized Compacted Baked Clay Blocks as a Walling Material

Flexural Behaviour of Partially Prestressed Reinforced Baked Clay Beams

Relation between Compressive Strength of Baked Clay Cubes and Cylinders

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