Analyzing the Mechanical, Durability, and Microstructural Impact of Partial Cement Replacement with Pumice Powder and Bamboo Leaf Ash in Concrete

Table 7

Mean flexural strength of the concrete with different replacement percentages and age.

Flexural strength
	7 days		14 days		28 days		28 days increment/reduction (%)
Mix-code	Samples	Mean	Samples	Mean	Samples	Mean
	3.178	—	3.267	—	3.87	—	—
Mix-1	3.219	3.078	3.31	3.163	3.597	3.684	0
	2.837	—	2.912	—	3.584	—	—
	2.702	—	3.106	—	3.917	—	—
Mix-2	2.917	2.897	3.452	3.229	3.968	3.868	4.99
	3.082	—	3.129	—	3.723	—	—
	2.65	—	3.436	—	3.504	—	—
Mix-3	2.793	2.696	3.382	3.102	3.747	3.604	−2.17
	2.646	—	3.238	—	3.581	—	—
	2.48	—	2.97	—	3.248	—	—
Mix-4	2.631	2.63	3.17	3.087	3.28	3.249	−11.80
	2.78	—	3.1	—	3.34	—	—
	2.518	—	2.86	—	2.761	—	—
Mix-5	2.462	2.562	3.1	2.82	3.355	3.108	−15.65
	2.78	—	2.51	—	3.208	—	—