利用多种工业废渣复配制备胶凝材料的实验研究

doi:10.11962/1006-4990.2020-0165

Abstract

Abstract:

Clinker-lean cement was produced with coal gangue slag,magnesium slag,fly ash and other industrial residues as the main raw materials.The raw materials were ground and screened,their composition was analyzed with fluoroanalyzer and XRD,and three groups i.e.nine proportion schemes was designed as follows: three groups of coal gangue slag-magesium slag-clinker-gypsum,three groups of coal gangue slag-fly ash-lime-gypsum and three groups of coal gangue slag-fly ash-calk.The physical properties such as strength,setting time,standard consistency requiring water and stability of products of nine sche-mes were detected.The results showed that due to double activation of lime and gypsum,the degree of hydration and hardening of coal gangue slag and fly ash was higher and the strength of the prepared cementitiou product was the biggest,flexural strength and compressive strength for 28 d were 8.2 MPa and 42.4 MPa,respectively.The optimal proportion scheme after experiment was 15∶30∶45∶10（mass ratio of coal gangue ash to fly ash to lime to gypsum）.

Key words: industrial residue, reactivity activating, cementing materials

CLC Number:

TQ177.6

Gao Jianrong,Li Wenyu,Yu Yanmei,Liu Yongming. Experimental study on activating various industrial residues to compound and prepare cementitious materials[J]. Inorganic Chemicals Industry, 2021, 53(2): 77-80.

Figures/Tables 6

References 18

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材料	w（CaO）	w（SiO₂）	w（Al₂O₃）	w（Fe₂O₃）	w（SO₃）	w（MgO）	w（K₂O）	w（Na₂O）	w（TiO₂）
煤矸石灰渣	5.21	45.70	30.12	4.21	2.12	0.88	0.84	0.00	1.06
粉煤灰	32.92	33.86	20.12	1.61	3.12	3.66	0.58	0.26	0.24
镁渣	50.18	30.12	1.08	2.94	1.03	12.15	0.36	0.24	—
熟料	62.45	21.19	4.78	3.61	0.76	2.31	0.86	0.12	0.24
生石灰	93.82	3.51	2.71	0.41	0.47	—	0.12	—	0.10
石膏	37.02	2.05	0.68	0.21	48.18	0.26	0.24	—	—

组号	配方号	煤矸石灰渣	金属镁渣	粉煤灰	熟料	石灰	石膏
A	1	52	28	—	12	—	8
	2	40	40	—	12	—	8
	3	28	52	—	12	—	8
B	4	28	—	52	—	10	10
	5	14	—	46	—	30	10
	6	15	—	30	—	45	10
C	7	50	—	25	—	25	—
	8	30	—	25	—	45	—
	9	35	—	25	—	40	—

实验编号	抗折强度/MPa			抗压强度/MPa
实验编号	3 d	7 d	28 d	3 d	7 d	28 d
1	2.0	2.4	4.0	10.2	11.8	15.4
2	3.4	7.9	6.6	12.0	13.6	26.6
3	1.7	6.5	5.6	9.4	11.8	19.8

实验编号	抗折强度/MPa			抗压强度/MPa
实验编号	3 d	7 d	28 d	3 d	7 d	28 d
4	4.4	6.7	7.3	13.6	18.4	41.2
5	4.7	5.4	7.6	8.4	20.2	35.8
6	6.0	7.9	8.2	14.5	22.3	42.4
7	5.2	7.4	8.0	11.0	17.5	23.5
8	6.1	8.6	6.0	15.5	18.6	21.6
9	3.6	6.5	8.3	9.5	21.5	28.1

实验序号	标准稠度/mL	初凝时间/min	终凝时间/min	膨胀值/ mm	安定性判定
1	224	41	490	4.2	合格
2	226	46	508	3.1	合格
3	228	47	442	4.0	合格
4	218	48	440	5.4	不合格
5	216	50	444	4.8	合格
6	228	55	542	4.7	合格
7	225	50	495	2.1	合格
8	223	52	512	5.6	不合格
9	222	51	510	4.2	合格

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Experimental study on activating various industrial residues to compound and prepare cementitious materials

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References 18

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组号	配方号	煤矸石灰渣	金属镁渣	粉煤灰	熟料	石灰	石膏
A	1	52	28	—	12	—	8
	2	40	40	—	12	—	8
	3	28	52	—	12	—	8
B	4	28	—	52	—	10	10
	5	14	—	46	—	30	10
	6	15	—	30	—	45	10
C	7	50	—	25	—	25	—
	8	30	—	25	—	45	—
	9	35	—	25	—	40	—

组号	配方号	煤矸石灰渣	金属镁渣	粉煤灰	熟料	石灰	石膏
A	1	52	28	—	12	—	8
	2	40	40	—	12	—	8
	3	28	52	—	12	—	8
B	4	28	—	52	—	10	10
	5	14	—	46	—	30	10
	6	15	—	30	—	45	10
C	7	50	—	25	—	25	—
	8	30	—	25	—	45	—
	9	35	—	25	—	40	—

组号	配方号	煤矸石灰渣	金属镁渣	粉煤灰	熟料	石灰	石膏
A	1	52	28	—	12	—	8
	2	40	40	—	12	—	8
	3	28	52	—	12	—	8
B	4	28	—	52	—	10	10
	5	14	—	46	—	30	10
	6	15	—	30	—	45	10
C	7	50	—	25	—	25	—
	8	30	—	25	—	45	—
	9	35	—	25	—	40	—