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Table 3 Factors and levels used in the orthogonal experimental design.

From: Tensile and Fracture Properties of Silicon Carbide Whisker-Modified Cement-Based Materials

Factor level

Factor

Dosage of water reducer (%)

A

Magnetic stirring time (min)

B

Ultrasonic dispersion time (min)

C

pH

D

1

0.3

5

1

7

2

0.4

10

2

9

3

0.5

15

4

11