Cymbopogon nardus Leaf Ash as an Alternative Material for Enhancing Concrete Strength

Table 1

Design specimen.

Type of concrete	Substitution of CNLA into cement (compressive strength)		Substitution of CNLA into cement (tensile strength)		Specimen name	Total specimen
	Amount of cement (%)	Amount of CNLA (%)	Amount of cement (%)	Amount of CNLA (%)
NC	100	0	100	0	NC1	10
					NC2
					NC3
					NC4
					NC5
CNLA-5	95	5	95	5	CNLA-5.1	10
					CNLA-5.2
					CNLA-5.3
					CNLA-5.4
					CNLA-5.5
CNLA-10	90	10	90	10	CNLA-10.1	10
					CNLA-10.2
					CNLA-10.3
					CNLA-10.4
					CNLA-10.5
CNLA-15	85	15	85	15	CNLA-15.1	10
					CNLA-15.2
					CNLA-15.3
					CNLA-15.4
					CNLA-15.5

Note. NC, normal concrete for specimen number 1–5; CNLA-5%, 5% of Cymbopogon nardus leaf ash in cement for specimen number 1–5; CNLA-10%, 10% of Cymbopogon nardus leaf ash in cement for specimen number 1–5; CNLA-15%, 15% of Cymbopogon nardus Leaf Ash in cement for specimen number 1–5.