钛矿渣-磷石膏复合制备超硫酸盐水泥试验研究

董丽卿; 蒋勇; 王国敏; 王宗义

doi:10.7513/j.issn.1004-7638.2023.02.018

钛矿渣-磷石膏复合制备超硫酸盐水泥试验研究

doi: 10.7513/j.issn.1004-7638.2023.02.018

董丽卿^1,,
蒋勇^{1, 2, ,},
王国敏¹,
王宗义¹

1.
绵阳职业技术学院, 四川绵阳 621000
2.
西南科技大学, 环境友好能源材料国家重点实验室, 四川绵阳 621000

基金项目: 四川省功能复合材料产教融合示范基地建设项目；达州市玄武岩纤维产业研究院开放基金项目；绵阳职业技术学院自然科学重点项目（MZ22ZD02、MZ22ZD01）。

详细信息

作者简介:
董丽卿，女，1984年出生，四川绵阳人，硕士，讲师，主要从事新型建筑材料和工业固废利用研究，E-mail：123862036@qq.com

通讯作者:
蒋勇，男，1988年出生，四川南充人，博士，讲师，主要从事工业固废处理和化学外加剂研发，E-mail：jiangyong7586@163.com

中图分类号: X757
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- 被引次数: 0
出版历程
- 收稿日期: 2022-12-29
- 刊出日期: 2023-04-30

Study on preparation of super sulfate cement by titanium slag and phosphogypsum

1.
Mianyang Polytechnic, Mianyang 621000, Sichuan, China
2.
State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621000, Sichuan, China

摘要

摘要: 采用磷石膏、钛矿渣、熟料和硅酸钠配制了10组超硫酸盐水泥，对基体的抗压强度、水化放热、水化产物进行了研究，并对纤维增强后的抗折强度、拉伸强度和抗冲击强度进行测试。结果表明，熟料和钛矿渣均能有效提升超硫酸盐水泥的抗压强度，并能促进水化放热和二次水化反应。较优的水泥配比为磷石膏∶钛矿渣∶熟料∶硅酸钠=25∶60∶13∶2，此时抗压强度达到42.1 MPa。玄武岩纤维可显著提高超硫酸盐水泥的抗折强度和抗冲击强度，表现为：当掺入0.3% 6 mm纤维时，试件的抗折强度提升了27.0%；掺入0.6%的12 mm纤维时，抗冲击强度提高了120.3%。拉伸试验结果表明，玄武岩纤维对提升水泥的极限拉伸强度不利，但能提高水泥的拉伸应变能力。
- 超硫酸盐水泥 /
- 钛矿渣 /
- 磷石膏 /
- 玄武岩纤维 /
- 抗折强度 /
- 拉伸强度
Abstract: Ten groups of super sulfate cement (SSC) were prepared by phosphogypsum, titanium slag, clinker and sodium silicate. The compressive strength, hydration heat release and hydration products of the matrix were studied, and the flexural strength, tensile strength and impact strength after fiber reinforcement were tested. The results show that both clinker and titanium slag can effectively improve the compressive strength of SSC, and promote hydration exothermic and secondary hydration reaction. The optimal cement ratio is phosphogypsum 25%, titanium slag 60%, clinker 13%, sodium silicate 2%, and the compressive strength reaches 42.1 MPa. Basalt fiber can significantly improve the flexural strength and impact strength of SSC. Specifically, with an addition of 0.3% 6-mm fiber, the flexural strength of the specimen increases by 27.0%. The impact strength increases by 120.3% when 0.6% 12-mm fiber is added. The tensile test results show that basalt fiber is disadvantageous to the improvement of the ultimate tensile strength of cement, but can enhance the tensile strain capacity of cement.
- super sulfate cement /
- titanium slag /
- phosphogypsum /
- basalt fiber /
- flexural strength /
- tensile strength

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图 1 原材料的XRD分析结果

Figure 1. XRD analysis results of raw materials

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图 2 抗压强度测试结果

Figure 2. Compressive strength test results

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图 3 PS组水化放热情况

Figure 3. Hydration heat release in PS group

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图 4 PK组水化放热情况

Figure 4. Hydration heat release in PK group

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图 5 养护56 d样品的XRD分析图谱

Figure 5. XRD analysis pattern of the sample for curing 56 days

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图 6 养护56 d样品的SEM形貌

Figure 6. SEM images of different samples for curing 56 days

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图 7 抗折强度测试结果

Figure 7. Flexural strength test results

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图 8 拉伸强度测试结果

Figure 8. Tensile strength test results

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图 9 典型的应力-应变曲线

Figure 9. Typical stress-strain curves

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图 10 抗冲击强度测试结果

Figure 10. Impact strength test results

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表 1 原材料的XRF分析结果

Table 1. XRF analysis results of raw materials %

成分	CaO	SiO₂	TiO₂	Al₂O₃	MgO	Fe₂O₃	SO₃	P₂O₅	Na₂O	K₂O	MnO
钛矿渣	27.06	28.76	16.69	12.57	7.13	3.22	2.31	0.05	0.81	0.75	0.45
磷石膏	36.48	10.48	0.22	1.52	0.37	0.95	46.83	1.97	0.09	0.27
熟料	68.17	18.54	0.67	4.44	1.40	3.57	1.68	0.12	0.31	0.83	0.10

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表 2 试验配合比

Table 2. Experimental mix proportion %

组号	磷石膏	钛矿渣	熟料	硅酸钠	水灰比
PS1	5	90	3	2	45
PS2	25	70	3	2	45
PS3	45	50	3	2	45
PS4	65	30	3	2	45
PS5	85	10	3	2	45
PK1	25	70	3	2	45
PK2	25	65	8	2	45
PK3	25	60	13	2	45
PK4	25	55	18	2	45
PK5	25	50	23	2	45

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