Automatic Measurement Method of Slump Flow of Cement Paste Based on Dynamic Image Processing Technology

Table 1

Comparison of SF measurement results of cement paste flowability test.

Water powder ratio	Admixture content (%)	Results of steel ruler measurement (mm)	Results of automatic measurement (mm)	Relative error (%)
0.9	0.5	260	255.7	1.65
0.9	0.6	285	280.0	1.75
0.9	0.7	300	297.7	0.77
1.0	0.5	290	295.4	1.86
1.0	0.6	300	298.0	0.67
1.0	0.7	310	307.5	0.81
1.1	0.5	310	312.6	0.84
1.1	0.6	320	320.18	0.06
1.1	0.7	330	328.7	0.39