Immobilization of Simulated Borate Radioactive Waste Solution in Cement-Poly(methylmethacrylate) Composite: Mechanical and Chemical Characterizations

Table 7

Compressive strength values of plain cement, cement-waste form, cement-PMMA composite, and cement-PMMA composite waste form aged for different periods.

(a)  Cement without PMMA

Aging time, month	Compressive strength (kg/cm^2)
	Plain cement	Cement waste form*
1	260	164
3	266	187
4	268	186
7	271	197
12	282	194

∗Containing 4% by weight borate waste simulate.

(b) Cement impregnated with PMMA

Aging time, month	Compressive strength (kg/cm^2)
	Cement-PMMA composite	Cement-PMMA composite waste form*
1	290	224
3	298	230
4	299	224
7	310	255
12	316	252

∗Containing 4% by weight borate waste simulate.