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

Table 2

Effect of the ratio of mixing floating beads on the cement slurry.

Floating beads: microbeads	Density (g·cm^−3)	φ300	φ200	φ100	φ6	φ3	24 h compressive strength (MPa)
10 : 0	1.5	275	214	157	24	19	8.2
9 : 1	1.5	261	198	145	22	18	8.9
8 : 2	1.5	263	186	153	19	15	9.2
7 : 3	1.5	247	169	134	19	14	9.8
6 : 4	1.5	244	174	136	17	14	10.5
5 : 5	1.5	246	171	124	17	13	11.6
4 : 6	1.5	239	178	132	16	13	12.3
3 : 7	1.5	236	172	119	17	14	13.7
2 : 8	1.5	221	168	113	16	12	14.3
1 : 9	1.5	228	161	107	14	10	14.1
0 : 10	1.5	219	151	103	13	10	14.6