A Study on the Flexural Behaviour of Geopolymer Lightweight Eco-Friendly Concrete Using Coconut Shell as Coarse Aggregate

Table 6

Comparison of test results at service stage and ultimate stage.

Beam ID	Service load (kN)	Ultimate load (kN)	1st crack load (kN)	Cracking moment (mcr-exp) (kN·m)	Service moment (Ms-exp) (kN·m)	Ultimate moment (Mu-exp) (kN·m)	Ultimate moment (Mu-theo) (kN·m)	Capacity ratio
Singly reinforced beam
GPCSC-S1	18.67	28	9	4.20	8.71	13.07	12.24	1.07
GPCSC-S2	25.33	38	10	4.67	11.82	17.73	16.88	1.05
GPCSC-S3	36.00	54	11	5.13	16.80	25.20	22.69	1.11
GPCC-S1	20.00	30	10	4.66	9.33	14.00	12.41	1.13
GPCC-S2	26.67	40	12	5.60	12.45	18.67	17.17	1.09
GPCC-S3	38.67	58	14	6.53	18.05	27.07	23.58	1.15
Doubly reinforced beam
GPCSC-D1	54.67	82	12	5.60	25.51	38.27	35.69	1.07
GPCSC-D2	88.00	132	13	6.07	41.07	61.60	59.94	1.03
GPCSC-D3	102.67	154	16	7.47	47.91	71.87	73.71	0.98
GPCC-D1	56.00	84	14	6.53	26.13	39.20	37.65	1.04
GPCC-D2	90.67	136	15	7.00	42.31	63.47	61.59	1.03
GPCC-D3	108.00	162	18	8.40	50.40	75.60	75.07	1.01