Abstract
Present study investigates the flexural strength of cob wallettes strengthened with bamboo and steel mesh reinforcement under lateral load. Soil, coconut coir, paddy straw, cement, bamboo and steel bars are the main ingredients for preparation of test wallettes. About 5% fibre and 10% cement (by mass of dry soil) was used to reinforced and stabilise soil for production of cob wallettes. Three major categories of samples were prepared. First category comprises: unstabilized-unreinforced cob wallettes (USURCW), cement stabilized cob wallettes (CSCW), coir fibre reinforced cob wallettes (CFRCW) and straw fibre reinforced cob wallettes (SFRCW). In second category similar samples shown in first category were reinforced with bamboo mesh and likewise in third category samples were reinforced with steel mesh. Test results shows that bamboo-fibre and steel-fibre reinforcement enhances the ductility property of wallettes, while bamboo and steel reinforced cement stabilized wallettes possess the maximum flexural strength. Only bamboo-fibre reinforced, steel-fibre reinforced and cement-stabilized bamboo and steel reinforced wallettes satisfies the minimum flexural strength (0.1 MPa) criteria specified in NZS 4297. The proposed scheme in the current study can be used for strengthening single leaf internal and external load bearing walls of single or two storey houses considering design seismic loads.
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