Mechanical Properties of Na₂CO₃-Activated High-Volume GGBFS Cement Paste

Table 3

Relative strengths of samples with the Na₂CO₃ activator compared to the strength of samples without activation.

Sample ID	Age (d)	Na2CO3 content (wt.%)
		1	2	3	4	5
R5	3	114.98	120.66	125.17	145.57	147.85
	7	105.61	119.28	121.68	125.13	137.29
	28	103.62	111.19	117.80	143.12	158.88
R6	3	112.07	117.04	122.83	151.23	128.96
	7	118.28	119.64	134.74	152.14	124.80
	28	113.36	135.05	153.53	159.60	156.40
R7	3	105.93	107.89	134.02	157.58	145.22
	7	115.00	118.75	135.22	147.86	150.71
	28	108.62	120.66	136.61	158.25	163.63
R8	3	103.06	105.42	126.21	141.14	164.29
	7	89.66	97.82	120.26	131.90	154.34
	28	91.33	108.71	121.55	139.43	168.00
R9	3	104.77	109.94	122.47	129.75	143.17
	7	100.00	106.74	119.21	137.36	144.83
	28	103.48	105.49	117.01	133.86	144.51

The results are listed relative to the strength of the sample without Na₂CO₃, which was considered to have a value of 100%.