赤泥矿粉沥青混合料的抗水损坏研究

付善春; 王冬冬; 沈红艳

doi:10.3969/j.issn.1000-6532.2022.05.005

赤泥矿粉沥青混合料的抗水损坏研究

doi: 10.3969/j.issn.1000-6532.2022.05.005

付善春^{1, 2,},
王冬冬^{1, 2},
沈红艳³

1.
信阳学院土木工程学院，河南　信阳　464000
2.
信阳市装配式建筑重点实验室，河南　信阳　464000
3.
信阳学院图书馆，河南　信阳　464000

基金项目: 河南省科技攻关计划项目(222102210306)；河南省高等学校重点科研项目：赤泥改性沥青混合料的综合利用研究（23B560013）；信阳学院校级科研项目资助（No.2022-XJLYB-014）

详细信息

作者简介:
付善春（1989-），男，讲师，硕士，主要从事建筑材料方面的研究

中图分类号: TD989
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出版历程
- 收稿日期: 2020-05-30
- 修回日期: 2020-07-07

Study on Water Damage Resistance of Red Mud Mineral Powder Asphalt Mixture

Fu Shanchun^{1, 2
,},
Wang Dongdong^{1, 2},
Shen Hongyan³

1.
Department of civil engineering, Xinyang College, Xinyang, Henan, China
2.
Xinyang Key Laboratory of Prefabricated Building, Xinyang, Henan, China
3.
Xinyang College Library, Xinyang，Henan, China

摘要

摘要: 为了解决制铝工业中排放的赤泥废弃料难题，为了探究赤泥矿粉替代量对沥青混合料抗水损坏性能的影响，提高废弃物资源的再利用率，采用“干法改性”方案，利用赤泥等质量代替沥青混合料中的石灰岩矿粉制成赤泥沥青胶浆和赤泥沥青混合料，通过赤泥沥青胶浆的吸持性能实验和赤泥沥青混合料的浸水马歇尔实验、冻融循环劈裂实验、浸水车辙实验来测试不同替代量赤泥沥青胶浆的粘附性能和赤泥沥青混合料的抗水损坏性能。结果表明：赤泥替代沥青混合料中的石灰岩矿粉能有效地改善沥青胶浆的粘附性能和沥青混合料的抗水损坏性能。而且通过对赤泥沥青胶浆粘附性能和沥青混合料抗水损坏的机理分析揭示了赤泥沥青混合料抗水损坏性能的原因，得出赤泥替代量为50%时沥青混合料性能较佳的结论。
- 赤泥矿粉 /
- 干法改性 /
- 抗水损坏性能 /
- 较佳替代量
Abstract: In order to solve the problem of red mud waste discharged in aluminum industry, to improve the reuse rate of waste resources, and to improve the corrosion resistance of asphalt mixture, the "dry modification" method was used to make red mud asphalt mortar and red mud asphalt mixture by using the same amount of red mud to replace the limestone powder in asphalt mixture. The red mud asphalt mortar absorption performance test and red mud asphalt mixture immersion Marshall test, freeze-thaw cycle split test, immersion rutting test were carried out to measure the adhesion performance of different replacement amount of red mud asphalt mortar and the water damage resistance performance of red mud asphalt mixture. The results showed that red mud can effectively improve the adhesion and water damage resistance of asphalt mixture. In addition, through the analysis of the adhesion performance of red mud asphalt mortar and the mechanism of water damage resistance of asphalt mixture, the reason of water damage resistance of red mud asphalt mixture was revealed, and the conclusion that the performance of asphalt mixture is the best when the replacement amount of red mud is 50% was obtained.
- Red mud mineral powder /
- Dry modification /
- Water damage resistance /
- Best replacement amount.

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图 1 普通矿粉沥青混合料（左）和掺加50%赤泥矿粉沥青混合料（右）的红外光谱曲线

Figure 1. Infrared spectrum curve of common mineral powder asphalt mixture (left) and 50% red mud mineral powder asphalt mixture (right)

下载: 全尺寸图片幻灯片

图 2 普通矿粉沥青混合料（左）和掺加50%赤泥矿粉沥青混合料（右）的DSC曲线

Figure 2. DSC curve of common mineral powder asphalt mixture (left) and 50% red mud mineral powder asphalt mixture (right)

下载: 全尺寸图片幻灯片

表 1 赤泥的主要化学成分/%

Table 1. Main chemical composition of red mud

Al₂O₃	SiO₂	Fe₂O₃	TiO₂	CaO	MgO	其他
72.27	14.38	5.19	2.13	1.69	0.97	3.37

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表 2 石灰岩的主要化学成分/%

Table 2. Main chemical constituent of limestone

Al₂O₃	SiO₂	Fe₂O₃	TiO₂	CaO	MgO	其他
33.86	16.32	1.23	2.22	37.81	6.52	2.04

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表 3 石灰岩矿粉技术指标检测结果

Table 3. Test results of technical indexes of limestone powder

各项技术指标	规范要求	实验检测结果	实验方法
含水量，不大于，%	1	0.18	T0103烘干法
表观密度，不小于，t/m³	2.50	2.685	T 0352-2000
粒度范围<0.075 mm，%	75～100	86.7	T 0351-2000
加热安定性	实测记录	与加热前矿粉颜色一致	T 0355-2000

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表 4 AC-13沥青混合料级配设计

Table 4. AC-13 Asphalt Mixture Gradation Design

方孔筛/mm	通过的质量百分数/%
方孔筛/mm	合成级配	级配上限	级配下限	目标级配
16	100	100	100	100
13.2	96.7	100	90	95
9.5	69.8	85	68	70.5
4.75	40.9	68	38	40.5
2.36	30	50	24	30.5
1.18	20.8	38	15	20.5
0.6	15.4	28	10	15
0.3	12.2	20	7	12
0.15	9.8	15	5	8.5
0.075	6.5	8	4	6

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表 5 不同赤泥矿粉掺量下沥青胶浆吸持量的变化情况

Table 5. Change of holding capacity of asphalt mortar with different red mud content

赤泥矿粉掺量/%	140 ℃的吸持量/%	160 ℃的吸持量/%	170 ℃的吸持量/%
0	61	49	31
25	73	56	39
50	85	69	44
75	91	75	49
100	95	80	51

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表 6 赤泥矿粉沥青混合料的浸水马歇尔稳定度实验结果

Table 6. Test results of Marshall stability of red mud asphalt mixture immersed in water

赤泥矿粉掺量/%	未浸水稳定度/kN	浸水48 h后稳定度/kN	浸水残留稳定度/%
0	7.32	5.12	69.95
25	10.56	8.75	82.86
50	13.69	12.65	92.40
75	14.98	14.06	93.85
100	15.53	14.75	94.97

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表 7 赤泥矿粉沥青混合料的冻融循环劈裂实验结果

Table 7. Test results of freeze-thaw cyclic splitting of red mud asphalt mixture

赤泥矿粉掺量/%	未冻融前劈裂抗拉强度R_T1/MPa	冻融后的劈裂抗拉强度R_T2/MPa	冻融劈裂抗拉强度比TSR/%
0	0.8125	0.5267	64.82
25	1.3845	0.9851	71.15
50	1.6871	1.4267	84.57
75	1.6999	1.4446	84.98
100	1.7109	1.4512	84.82

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表 8 赤泥矿粉沥青混合料的浸水车辙实验结果

Table 8. Rutting test results of red mud mineral powder asphalt mixture

赤泥矿粉掺量/%	45 min时的位移/mm	60 min时的位移/mm	动稳定度/（次· mm^-1）
0	3.896	4.324	2283
25	3.154	3.562	2984
50	2.652	2.841	3801
75	2.661	3.247	3654
100	2.559	3.004	3691

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