碱激发矿渣水泥基材料收缩性能研究

doi:10.11962/1006-4990.2019-0586

Abstract

Abstract:

The influence of expansive agents dasages,alkali concentration and modulus of sodium silicate on drying shrinkage and mass loss of alkali activated slag was investigated by XRD,SEM and TG.The results indicated that the addition of CaO expansive agent caused swelling phenomenon on alkali activated slag,and the expansion value increased with the dosage of CaO expansive agent（6%~10%）.While the addition of calcium oxide-calcium sulphoaluminate expansive agent didn′t improve the shrinkage of alkali activated slag.The results of XRD and SEM tests showed that Ca（OH）₂ was the main expansion component in CaO expansive agent.Besides,no AFt prepared after the addition of calcium oxide-calcium sulphoaluminate expansive agent was the main reason that CS could not improve the shrinkage of slag.The effect of expansive agent in activated slag was affected by calcium oxide-calcium sulphoaluminate and alkali concentration.Expansive agents could decrease the mass loss and free water content of SG and CaO expansive agent could significant reduce that.

Key words: alkali activated slag cement, calcium series expansive agent, drying shrinkage

CLC Number:

TQ172.12

Ma Pengfei,Li Shuang,Cheng Baojun,Kang Shengrong,Zhang Ping,Gao Yuxin. Research on contractility of alkali activated slag mortar[J]. Inorganic Chemicals Industry, 2020, 52(10): 145-150.

Figures/Tables 11

References 23

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材料	w（SiO₂）	w（Al₂O₃）	w（CaO）	w（MgO）	w（TiO₂）	w（Fe₂O₃）
SG	31.63	13.42	36.35	9.12	2.76	1.32
C	3.81	2.02	78.27	1.18	—	1.55
CS	4.97	1.29	50.07	2.05	—	1.15
材料	w（SO₃）	w（K₂O）	w（Na₂O）	烧失量	w（f-CaO）
SG	0.28	0.46	0.34	0.61	—
C	0.17	—	—	11.49	55.73
CS	20.65	—	—	18.84	—

编号	w（SG）/%	w（C）/%	w（CS）/%	w（Na₂O）/%	模数
1	100	0	0	5	1.2
2	94	6	0	5	1.2
3	92	8	0	5	1.2
4	90	10	0	5	1.2
5	92	8	0	4	1.2
6	92	8	0	6	1.2
7	92	8	0	5	1.5
8	92	8	0	5	1.8
9	94	0	6	5	1.2
10	92	0	8	5	1.2
11	90	0	10	5	1.2
12	92	0	8	4	1.2
13	92	0	8	6	1.2
14	92	0	8	5	1.5
15	92	0	8	5	1.8

样品编号	w（可蒸发水）	样品编号	w（可蒸发水）
SG	71.70	SG-CS-8%	69.23
SG-C-8%	62.86

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Inorganic Acid-Base-Salt Committee of CIESC

Research on contractility of alkali activated slag mortar

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References 23

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编号	w（SG）/%	w（C）/%	w（CS）/%	w（Na₂O）/%	模数
1	100	0	0	5	1.2
2	94	6	0	5	1.2
3	92	8	0	5	1.2
4	90	10	0	5	1.2
5	92	8	0	4	1.2
6	92	8	0	6	1.2
7	92	8	0	5	1.5
8	92	8	0	5	1.8
9	94	0	6	5	1.2
10	92	0	8	5	1.2
11	90	0	10	5	1.2
12	92	0	8	4	1.2
13	92	0	8	6	1.2
14	92	0	8	5	1.5
15	92	0	8	5	1.8

编号	w（SG）/%	w（C）/%	w（CS）/%	w（Na₂O）/%	模数
1	100	0	0	5	1.2
2	94	6	0	5	1.2
3	92	8	0	5	1.2
4	90	10	0	5	1.2
5	92	8	0	4	1.2
6	92	8	0	6	1.2
7	92	8	0	5	1.5
8	92	8	0	5	1.8
9	94	0	6	5	1.2
10	92	0	8	5	1.2
11	90	0	10	5	1.2
12	92	0	8	4	1.2
13	92	0	8	6	1.2
14	92	0	8	5	1.5
15	92	0	8	5	1.8

编号	w（SG）/%	w（C）/%	w（CS）/%	w（Na₂O）/%	模数
1	100	0	0	5	1.2
2	94	6	0	5	1.2
3	92	8	0	5	1.2
4	90	10	0	5	1.2
5	92	8	0	4	1.2
6	92	8	0	6	1.2
7	92	8	0	5	1.5
8	92	8	0	5	1.8
9	94	0	6	5	1.2
10	92	0	8	5	1.2
11	90	0	10	5	1.2
12	92	0	8	4	1.2
13	92	0	8	6	1.2
14	92	0	8	5	1.5
15	92	0	8	5	1.8