Table 1.

Proportions of marble powder in the clay bricks.

Brick Groups	Number of Bricks	% of Marble by Weight	% of Clay by Weight	Marble Weight (kg)	Clay Weight (kg)
A	15	0	100	0	50
B1	15	5	95	2.5	47.5
B2	15	10	90	5	45
B3	15	15	85	7.5	42.5
B4	15	20	80	10	40
B5	15	25	75	12.5	37.5
B6	15	30	70	15	35