Bond strenght in concrete of canes from three rattan species

Lucas, E. B.; Dahunsi, Bio

doi:10.4314/jaset.v4i1.38281

Cited by 7 publications

(7 citation statements)

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“…The bond strength of the canes of selected rattan species in concrete was investigated [43]. It was reported that the strength could be up to roughly 30% of that of mild steel with concrete.…”

Section: Concrete Beam Reinforcementmentioning

confidence: 99%

Development of Sustainable Building Materials from Agro- Industrial Wastes in Nigeria

Olorunnisola¹

2019

Sustainable Construction and Building Materials

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One of the continuing challenges posed by unprecedented urbanisation in Nigeria, estimated at about 5% per annum, is the provision of adequate and affordable housing. The shortage in housing, due in part to the ever-rising prices of construction materials, makes it logical to consider alternative building materials. Paradoxically, Nigeria is grappling with the challenges of managing solid waste, many of which could find suitable applications in the production of cement-, concrete-and clay-based walling, roofing and ceiling products as well as pozzolans for partial replacement for ordinary Portland cement. The objective of this chapter is to present information on the development, experimental investigations and practical application of sustainable building materials from agro-industrial wastes in Nigeria. Agroforestry residues such as bagasse and corn cob ashes have been found suitable as pozzolans; cement-and clay-bonded reinforced composite roofing tiles, hollow concrete blocks and stabilised clay bricks have been developed using a variety of lignocelluloses as sources of fibre reinforcement, while biomaterial substitutes for steel reinforcement in concrete have been tested. However, for these products to become widely acceptable, greater awareness has to be created among all stakeholders in the building construction industry, coupled with the development of appropriate building codes.

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Section: Concrete Beam Reinforcementmentioning

confidence: 99%

Development of Sustainable Building Materials from Agro- Industrial Wastes in Nigeria

Olorunnisola¹

2019

Sustainable Construction and Building Materials

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“…Lucas and Dahunsi [42] found that the interfacial bond strengths of rattan-concrete were in the range 0.082 -0.598 N/mm 2 depending on the species, concrete grade and other natural conditions. The experimental results of 0.34 -0.38 N/mm 2 obtained by Cox and Gyemayer [43] fall within the range.…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies of Steel, Bamboo and Rattan as Reinforcing Bars in Concrete: Tensile and Flexural Characteristics

Adewuyi¹,

Otukoya²,

Olaniyi³

et al. 2015

OJCE

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This study comparatively evaluated the flexural performance and deformation characteristics of concrete elements reinforced with bamboo (Bambusa vulgaris), rattan (Calamuc deerratus) and the twisted steel rebars. The yield strength (YS), ultimate tensile strength (UTS) and the elongation of 50 specimens of the three materials were determined using a universal testing machine. Three beams of concrete strength 20 N/mm 2 at age 28 days were separately reinforced with bamboo, rattan and steel bars of same percentage, while the stirrups were essentially mild steel bars. The beams were subjected to centre-point flexural loading according to BS 1881 to evaluate the flexural behaviour. The YS of bamboo and rattan bars were 13% and 45% of that of steel respectively, while their UTS were 16% and 62% of that of steel in the same order. The elongation of bamboo, rattan and steel were 7.42%, 10% and 14.7% respectively. The natural rebars were less than the 12% minimum requirement of BS 4449. The load-deflection plots of bamboo and steel RC beams were quadratic, while rattan RC beams had curvilinear trend. The stiffness of bamboo RC beams (BB) and rattan RC beams (RB) were 32% and 13.5% of the stiffness of steel RC beams (SB). The post-first crack residual flexural strength was 41% for BB and SB, while RB was 25%. Moreover, the moment capacities of BB and RB corresponded to 51% and 21% respectively of the capacity of steel RC beams. The remarkable gap between the flexural capacities of the natural rebars and that of steel can be traced not only to the tensile strength but also the weak bonding at the bar-concrete interface. It can be concluded that the bamboo bars are suitable rebars for non-load bearing and lightweight RC flexural structures, while more pre-strengthening treatment is required more importantly for rattan for improved interfacial bonding and load-carrying capacity. * Corresponding author.A. P. Adewuyi et al. 229

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“…Under inelastic analysis considering the beam section cracked the conventional moment equation is Equation [3]. The relation between the load (P) and moment (M) is shown in Equation [4] (Figure 1). Bond stress between concrete and reinforcement will be generated at the contact of them and the amount of bond force will be equal to the multiplication of bond stress and the surface area of reinforcement.…”

Section: Results and Discussion On Flexural Testmentioning

confidence: 99%

“…All the other materials that are used structurally are manmade and therefore some form of quality control can be exercised during their productions, this has led to some research work on the structural properties of Rattan cane. Lucas and Dahunsi [4] were able to treat rattan cane with some preservatives like creosote and bitumen, while some samples were left untreated. The rattan cane concrete bond strength for untreated samples ranges between 0.1443 and 0.5611 N/mm 2 while samples treated with creosote ranges between 0.0165 and 0.3451 N/mm 2 , the bitumen treated samples gave bond strength of between 0.4467 and 0.5729 N/mm 2 , depending on the species and natural conditions, as compared to below 3 N/mm 2 obtained for plain-steel concrete bond [9] and above 6 MPa obtained for deformed-steel concrete bond [7,9].…”

Section: Introductionmentioning

confidence: 99%