Enhancing class F fly ash geopolymer concrete performance using lime and steam curing

Diab, Muhammad Ahmad

doi:10.1186/s44147-022-00111-6

Journal of Engineering and Applied Science

Table 1 Concrete mix proportions and test results

From: Enhancing class F fly ash geopolymer concrete performance using lime and steam curing

Mix name	Lime	Additional water	NaOH molarity	Coarse agg	Sand	Moisture of agg^a	Curing type	Initial setting time	Final setting time	7 days fcu^c	28 days fcu^c	fspt ^d	Voids ratio
Mix name	% of fly ash	Total % of fly ash	NaOH molarity	kg/m³	kg/m³	kg/m³	s, t, a, or w^b	(h)	(h)	(MPa)	(MPa)	(MPa)	%
M1	0	10	16	852.5	852.5	0^a	s	4	36	12	21.6	1.27	10.2
M2	2	10	16	848.3	848.3	0	s	1.5	7	39	42.2	3.05	7.1
M3	4	10	16	844.1	844.1	0	s	0.67	3.5	31.8	35.2	2.9	9.1
M4	6	10	16	839.9	839.9	0	s	0.42	3	33	34	2.81	10.4
M5	3	10	16	846.2	846.2	0	s	1	4.25	32	35.9	2.91	10.3
M6	1	10	16	850.4	850.4	0	s	2.67	24	22	25.6	2.07	11.4
M7	0	10	16	852.5	852.5	0	t	4	36	23.5	27	2	8.5
M8	0	10	16	852.5	852.5	0	a	4	36	14	19		4.9
M9	0	10	16	852.5	852.5	0	w	4	36	6.6	10.4		5
M10	2	10	16	848.3	848.3	0	t	1.5	7	22.2	22.6		9.8
M11	2	10	16	848.3	848.3	0	a	1.5	7	14.2	17.6		6.5
M12	2	10	16	848.3	848.3	0	w	1.5	7	12.3	15.6		9.4
M13	4	10	16	844.1	844.1	0	t	0.67	3.5	15.49	17.6		10.1
M14	4	10	16	844.1	844.1	0	a	0.67	3.5	17.6	20.8		7.7
M15	4	10	16	844.1	844.1	0	w	0.67	3.5	18.2	21.2		12.1
M16	6	10	16	839.9	839.9	0	t	0.42	3	16	10.2		12
M17	6	10	16	839.9	839.9	0	a	0.42	3	15.1	18		8.3
M18	6	10	16	839.9	839.9	0	w	0.42	3	17.3	20		12.7
M19	3	10	16	846.2	846.2	0	t	1	4.25	18.4	20		10.3
M20	3	10	16	846.2	846.2	0	a	1	4.25	15.2	18.6		7.7
M21	3	10	16	846.2	846.2	0	w	1	4.25	14.6	18.4		13.6
M22	1	10	16	850.4	850.4	0	t	2.67	24	22.3	25	2.8	10.3
M23	1	10	16	850.4	850.4	0	a	2.67	24	9.1	11.6		7.1
M24	1	10	16	850.4	850.4	0	w	2.67	24	10.3	13	0.71	12.9
M25	4	13.5	16	825.7	825.7	0	s	0.83	4	24.1	27.6	2.03	12
M26	0	7.5	16	865.6	865.6	0	t	3.5	30	19.1	29	2.21	8.4
M27	0	13.5	16	834.2	834.2	0	t	5	38	16.5	25.2	2	10.1
M28	2	7.5	16	861.4	861.4	0	s	1.33	6.5	37.4	43	3.07	8.4
M29	2	7.5	12	857.7	857.7	0	s	1.5	6.75	28.6	34	2.9	10.1
M30	2	7.5	8	853.9	853.9	0	s	1.75	8	1.3	1.54	0.1	18.1
M31	4	7.5	12	853.5	853.5	0	s	0.67	5.5	23.4	27.8	2.8	10.4
M32	6	7.5	12	849.3	849.3	0	s	0.42	3	15.3	18.2	1.62	11.6
M33	0	7.5	12	861.9	861.9	0	t	3.67	36	18	22	1.32	10.8
M34	0	7.5	8	858.1	858.1	0	t	3.75	40	5.7	8.1	0.78	11.5
M35	2	5	16	874.5	874.5	0	s	1.17	6.15	39	44	3.25	10.8
M36	2	7.5^a	16	884	884	17.7^a	s	1.5	6.5	24.1	28.4		13.5
M37	2	7.5^a	16	895.2	895.2	26.9^a	s	1.6	6.5	20.3	24.3		15.6
M38	2	7.5^a	16	900.7	900.7	45.0^a	s	1.67	7	16.8	20.2		16.7
M39	0	7.5^a	16	888.3	888.3	17.8^a	t	3.5	30	16.5	20		9.4
M40	0	7.5^a	16	899.6	899.6	27.0^a	t	3	36	14.2	17.4		9.8
M41	0	7.5^a	16	904.9	904.9	45.2^a	t	3	38	9.8	12.3		10.6

^aThe moisture of aggregate was subtracted from the additional water in these specimens, and 0 means oven-dried aggregates. ^bt means thermal curing under 70 °C for 2 days, s means steam curing without pressure for 2 days, a means to be left in ambient temperature in air without curing, and w means water curing up to testing date. ^cCube compressive strength after 7 days and 28 days. ^dSplitting tensile strength after 28 days

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