Towards Sustainability: An Experimental and Analytical Investigation of an Agricultural Waste as a Pozzolanic Material in Concrete Mixtures

Table 7

Post hoc analysis for RHA replacements.

	(I) RHA	(J) RHA	Mean difference (I − J)	Std. error	value	95% confidence interval
						Lower bound	Upper bound
Tukey’s HSD	0% (OPC)	RHA 10%	−1.7917	.59411	0.034	−3.4885	−.0948
		RHA 15%	.3175	.59411	0.983	−1.3793	2.0143
		RHA 20%	2.3908	.59411	0.002	.6940	4.0877
		RHA 5%	−1.9642	.59411	0.016	−3.6610	−.2673
	RHA 10%	0% (OPC)	1.7917	.59411	0.034	.0948	3.4885
		RHA 15%	2.1092	.59411	0.008	.4123	3.8060
		RHA 20%	4.1825	.59411	<0.001	2.4857	5.8793
		RHA 5%	−.1725	.59411	0.998	−1.8693	1.5243
	RHA 15%	0% (OPC)	−.3175	.59411	0.983	−2.0143	1.3793
		RHA 10%	−2.1092	.59411	0.008	−3.8060	−.4123
		RHA 20%	2.0733	.59411	0.010	.3765	3.7702
		RHA 5%	−2.2817	.59411	0.004	−3.9785	−.5848
	RHA 20%	0% (OPC)	−2.3908	.59411	0.002	−4.0877	−.6940
		RHA 10%	−4.1825	.59411	<0.001	−5.8793	−2.4857
		RHA 15%	−2.0733	.59411	0.010	−3.7702	−.3765
		RHA 5%	−4.3550	.59411	<0.001	−6.0518	−2.6582
	RHA 5%	0% (OPC)	1.9642	.59411	0.016	.2673	3.6610
		RHA 10%	.1725	.59411	0.998	−1.5243	1.8693
		RHA 15%	2.2817	.59411	0.004	.5848	3.9785
		RHA 20%	4.3550	.59411	<0.001	2.6582	6.0518