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

Table 2

Comparison of T200 measurement results of cement paste flowability test

Water powder ratio	Admixture content (%)	① Results of observing the pictures (mm)	② Results of the algorithm in reference [9] (mm)	③ Results of the algorithm in this paper (mm)	Relative error of ① and ② (%)	Relative error of ① and ③ (%)
0.9	0.5	4600	4337	4700	5.72	2.17
0.9	0.6	3900	3750	3800	3.85	2.56
0.9	0.7	3300	2971	3400	9.97	3.03
1.0	0.5	3100	2664	2900	14.06	6.45
1.0	0.6	2500	2499	2300	0.04	8.00
1.0	0.7	2300	0	2200	100.00	4.35
1.1	0.5	2000	1655	2000	17.25	0.00
1.1	0.6	1300	0	1400	100.00	7.69
1.1	0.7	800	0	900	100.00	0.13