Experimental Investigation of the Influence of Cellulose Ether on the Floating of Rubber Particles in Mortar

Table 5

Coding schedule of level of factor.

Canonical variable zj	Natural variable xj
	Mixing amount of cellulose X1 (kg)	Substitution rate of rubber X2 (%)
Upper asterisk arm r	5.43	50% (432 kg)
Upper level 1	4.64	42.68 (368.76 kg)
Zero level 0	2.72	25% (216 kg)
Lower level −1	0.79	7.32% (63.24 kg)
Lower asterisk arm −r	0	0 (0 kg)
Interval of change	1.92	17.68% (152.76 kg)