Research Article
A Study on the Flexural Behaviour of Geopolymer Lightweight Eco-Friendly Concrete Using Coconut Shell as Coarse Aggregate
Table 5
Crack width, reinforcement ratio, and number of cracks.
| | Beam ID | Neutral axis depth (xu) (mm) | Reinforcement ratio (%P) P = (Ast/bd) in (%) | Crack width (mm) | Number of cracks |
| | Singly reinforced beam (SRB) | | GPCSC-S1 | 48.60 | 0.52 | 3.59 | 25 | | GPCSC-S2 | 70.63 | 0.75 | 3.14 | 22 | | GPCSC-S3 | 103.11 | 1.13 | 2.98 | 21 | | GPCC-S1 | 44.00 | 0.52 | 2.81 | 22 | | GPCC-S2 | 63.71 | 0.75 | 2.73 | 19 | | GPCC-S3 | 94.46 | 1.13 | 2.61 | 18 |
| | Doubly reinforced beam (DRB) | | GPCSC-D1 | 119.15 | 2.01 | 3.02 | 53 | | GPCSC-D2 | 120.75 | 3.14 | 2.45 | 49 | | GPCSC-D3 | 126.73 | 3.89 | 1.98 | 48 | | GPCC-D1 | 114.93 | 2.01 | 2.64 | 50 | | GPCC-D2 | 115.18 | 3.14 | 2.42 | 46 | | GPCC-D3 | 118.54 | 3.89 | 1.45 | 38 |
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Ast: area of reinforcement; b: breadth of beam; d: effective depth of a beam.
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