A Study on Ceramsite Production Using Dredging Sea Mud and Its Biofilm Formation Capacity Evaluation

Table 5

Presintering results.

No.	A (X1) (min)	B (X2) (°C)	C (X3) (min)	D (X4) (°C)	Bulk density (g.cm^−3)	Water absorption (%)	Compressive strength (MPa)	Expansion rate (%)
1	5	250	6	900	797	46	○	1.01
2	5	300	9	1000	674	18.7	2.29	1.3
3	5	350	12	1100	617	16	3.7	1.3
4	5	400	15	1200	/	/	/	/
5	10	250	9	1100	553	19	3.3	1.3
6	10	300	6	1200	/	/	/	/
7	10	350	15	900	756	28	○	1.3
8	10	400	12	1000	623	12.7	4.1	1.7
9	15	250	12	1200	/	/	/	/
10	15	300	15	1100	455	35.3	3.5	1.2
11	15	350	6	1000	695	22	2.7	2.0
12	15	400	9	900	763	36	○	1.5
13	20	250	15	1000	665	25	2.8	1.7
14	20	300	12	900	749	20	○	1.5
15	20	350	9	1200	/	/	/	/
16	20	400	6	1100	578	14	3.8	1.4

Note: “○” means that it is not made into ceramsite and “/” means that the ceramsite is overfired.