A Low-Cost and Low-Density Cement Slurry System Suitable for a Shallow Unconsolidated Stratum

Table 6

Thickening time after the addition of different amounts of retarder.

RE-L (%)	Thickening time (min/50°C × 25 MPa)
0	151
0.5	172
1.0	206
1.5	223
2	271
2.5	300