Experimental Study of Flexural Behaviour  of Reinforced Baked Clay Beams under  Impact Loading

Lakho, Nawab Ali; Zardari, Muhammad Auchar

doi:10.4236/eng.2016.86032

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…Research has been carried out on flexural behaviour of laboratory size Reinforced Baked Clay (RBC) beams. The studies suggest that the load carrying capacity of RBC beams is also comparable to that of RCC beams [8].…”

Section: Introductionmentioning

confidence: 77%

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Effect of Reinforcement on Deflection and Cracks in Baked Clay Beams Subjected to Impact Loading

Lakho¹,

Zardari²

2016

ENG

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Attempts are being made to utilize Reinforced Baked Clay (RBC) as a substitute of Reinforced Cement Concrete (RCC) for construction of low cost houses in plains of Pakistan. Since baked clay is considered to be more brittle as compared to concrete. Therefore, it is necessary to investigate how deflection and crack width of RBC beams subjected to impact loading are governed by amount of reinforcement. This paper presents the behaviour of RBC beams under drop weight impact loading. The beams were reinforced with two steel bars, one in compression zone and the other in tension zone. In group A beams, the diameter of steel bars was 12.7 mm, while the beams of group B were reinforced with steel bars of 15.8 mm diameter. The RBC beams were subjected to repeated impacts of a hammer of mass 21 kg falling from a height of 1000 mm. The results show that 1) three times reduction in deflection, and 2) 2.5 times decrease in crack width, were achieved in RBC beams by increasing the area of steel to 50%. In addition to this, all the RBC beams failed within nine blows of the hammer, irrespective of area of reinforcement.

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Section: Introductionmentioning

confidence: 77%

“…In this regard, baked clay is considered to be a potential material for construction of low cost houses. Preliminary studies report that the compressive strength of baked clay is comparable to that of normal weight concrete [1]- [7]. Research has been carried out on flexural behaviour of laboratory size Reinforced Baked Clay (RBC) beams.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reinforcement on Deflection and Cracks in Baked Clay Beams Subjected to Impact Loading

Lakho¹,

Zardari²

2016

ENG

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“…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]. The problems of shrinkage and cracking of clay beams during dying [22] and firing process [23] are also addressed.…”

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 conducted studies reported that baked clay exhibited 1.5 to 2 times higher crushing strength than that of normal concrete [7][8][9][10][11][12][13][14][15]. RBC beams with tensile reinforcement, without shear and compressive reinforcement, only failed at the ultimate load of 80 kN applied at mid span [15].…”

Section: Introductionmentioning

confidence: 99%

Reinforcement dependent long term deflection response of baked clay beams

Zardari

Lakho

2017

Scientia Iranica

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Reinforced Baked Clay (RBC) may serve as low-cost materials of building construction to substitute Reinforced Cement Concrete (RCC). De ection of a beam under a sustained load is considered an important parameter. Based on reports obtained from the literature, no study has been carried out on the e ect of reinforcement on long-term de ection response of RBC beams and relative comparison to that of RCC beams. For this purpose, RBC beams were manufactured, baked, and post-reinforced in the tension zone only with three ratios of reinforcement (i.e., 0.003, 0.006, and 0.009). All the beams were subjected to a sustained load of 50 kN for one year. The results indicate that longterm de ection of RBC beams was reduced to 20% and 50% when the reinforcement ratio increased to 2 and 3 times the initial reinforcement ratio of 0.003, respectively. The ultimate load-carrying capacity of the RBC beams was similar to that of RCC beams. The de ection of RBC beams was thrice the de ection of RCC beams. This paper shows that RBC beams can be utilized instead of RCC ones while the element of strength is considered.

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Experimental Study of Flexural Behaviour of Reinforced Baked Clay Beams under Impact Loading

Cited by 8 publications

References 14 publications

Effect of Reinforcement on Deflection and Cracks in Baked Clay Beams Subjected to Impact Loading

Effect of Reinforcement on Deflection and Cracks in Baked Clay Beams Subjected to Impact Loading

Flexural Behaviour of Partially Prestressed Reinforced Baked Clay Beams

Reinforcement dependent long term deflection response of baked clay beams

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