改性水硬性石灰基材料的制备与耐久性

李悦; 于鹏超; 刘金鹏; 李虹

doi:10.11936/bjutxb2016050033

改性水硬性石灰基材料的制备与耐久性

doi: 10.11936/bjutxb2016050033

北京工业大学城市与工程安全减灾教育部重点实验室, 北京 100124

基金项目: 北京市属高等学校高层次人才引进与培养计划资助项目(CIT&TCD20150310)

详细信息

作者简介:
作者简介: 李悦(1972—), 男, 教授, 博士生导师, 主要从事建筑材料方面的研究, E-mail:liyue@bjut.edu.cn

通讯作者:
于鹏超(1990—), 男, 硕士研究生, 主要从事建筑材料方面的研究, E-mail:191429053@qq.com

中图分类号: TU502
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- 被引次数: 0
出版历程
- 收稿日期: 2016-05-13
- 网络出版日期: 2022-09-13
- 刊出日期: 2017-02-01

Preparation and Durability of Modified Hydraulic Lime-based Material

The Key Laboratory of Urban Security and Disaster Engineering, MOE, Beijing 100124, China

摘要

摘要: 为了得到更加适宜于岩土文物保护加固的水硬性石灰材料,研究了掺加矿粉、外加剂和聚乙烯醇纤维的改性水硬性石灰的配合比优化设计、力学性能、水化硬化机理和耐久性. 研究发现:矿粉、外加剂和聚乙烯醇纤维能显著提高水硬性石灰的力学性能以及耐久性;经改性后的水硬性石灰试样D,其抗折强度、抗压强度和拉拔强度分别能达到3.27、15.45、0.61MPa,而且,经过耐水、耐盐和干湿循环试验后,仍然保持较高的力学性能,这对于岩土质文物的保护修复具有重大的意义.
- 水硬性石灰 /
- 矿粉 /
- 聚乙烯醇纤维 /
- 耐久性
Abstract: In order to get more suitable hydraulic lime materials for stone and earthen historical relics reinforcement conservation, the slag, admixtures and polyvinyl alcohol fiber modified hydraulic lime mixture proportion optimization design, physical mechanical properties, mechanism of hydration hardening and durability were studied in this paper. The researches show that adding slag, admixtures and polyvinyl alcohol fiber can significantly improve the samples’ physical mechanical properties and durability. The flexural strength, compressive strength and pull strength of the modified hydraulic lime sample D had reached at 3.27, 15.45 and 0.61MPa, respectively. Moreover, after the water, salt and dry-wet cycle tests, the sample D still keeps high mechanical properties, which have important implications for conservation and restoration of the stone and earthen historical relics.
- hydraulic lime /
- slag /
- polyvinyl alcohol fiber /
- durability
The authors have declared that no competing interests exist.

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图 1 抗折强度随龄期的变化

Figure 1. Relationship between flexural strength and age

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图 2 抗压强度随龄期的变化

Figure 2. Relationship between compressive strength and age

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图 3 拉拔强度随龄期的变化

Figure 3. Relationship between pull strength and age

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图 4 抗折强度随龄期的变化

Figure 4. Relationship between flexural strength and age

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图 5 抗压强度随龄期的变化

Figure 5. Relationship between compressive strength and age

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图 6 拉拔强度随龄期的变化

Figure 6. Relationship between pull strength and age

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图 7 试样经水浸泡后抗折强度的变化

Figure 7. Flexural strength variation after water immersion

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图 8 试样经水浸泡后抗压强度的变化

Figure 8. Compressive strength variation after water immersion

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图 9 耐盐前后抗折强度的变化

Figure 9. Flexural strength variation before and after the salt

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图 10 耐盐前后抗压强度的变化

Figure 10. Compressive strength variation before and after the salt

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图 11 干湿循环前后抗折强度的变化

Figure 11. Flexural strength variation before and after dry-wet cycles

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图 12 干湿循环后试样抗压强度的变化

Figure 12. Compressive strength variation before and after dry-wet cycles

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图 13 矿粉的XRD分析图

Figure 13. XRD analysis chart of slag

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图 14 试样o和A的XRD分析图

Figure 14. XRD analysis of o and A samples

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图 15 o、A、B和D的SEM分析图

Figure 15. SEM analysis of o, A, B, C, D samples

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表 1 水硬性石灰和矿粉的化学分析结果

Table 1. Chemical compositions of the hydraulic lime and slag%

成分	w(CaO)	w(SiO₂)	w(Al₂O₃)	w(MgO)	w(Fe₂O₃)	w(K₂O)	w(SO₃)	w(TiO₂)	w(loss)
水硬性石灰	70.7	15.2	5.32	2.64	2.33	1.84	1.00	0.36	0.61
矿粉	43.7	23.2	12.3	16.6	0.17	0.29	1.35	1.63	0.76

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表 2 聚乙烯醇纤维的性能参数

Table 2. Properties of the polyvinyl alcohol fiber

直径/μm	密度/(g·cm^-3)	抗拉强度/MPa	长度/mm	材料形状	分散性/级
18±3	1.3	1860	6~12	束状单丝	1

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表 3 水硬性石灰-矿粉复合体系的配合比

Table 3. Mix proportion of hydraulic lime-slag system

编号	w(石灰)/%	w(矿粉)/%	水胶比
o	100	0	0.51
a	70	30	0.50
b	60	40	0.50
c	50	50	0.48
d	40	60	0.47
e	30	70	0.47
f	20	80	0.47

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表 4 掺外加剂和纤维的水硬性石灰-矿粉体系的配合比

Table 4. Mix proportion of hydraulic lime-slag system mixing with admixtures and fiber

编号	w(石灰)/%	w(矿粉)/%	w(黏性剂)/%	w(抗裂剂)/%	w(触变剂)/%	w(黏结剂)/%	w(纤维)/%	水胶比
o	100	0	0.0	0.0	0.0	0.0	0.00	0.51
A	40	60	0.0	0.0	0.0	0.0	0.00	0.47
B	40	60	0.8	0.8	0.8	0.8	0.00	0.51
C	40	60	0.8	0.8	0.8	0.8	0.25	0.51
D	40	60	0.8	0.8	0.8	0.8	0.50	0.51
E	40	60	0.8	0.8	0.8	0.8	0.75	0.52
F	40	60	0.8	0.8	0.8	0.8	1.00	0.52
G	40	60	0.8	0.8	0.8	0.8	1.25	0.52
H	40	60	0.8	0.8	0.8	0.8	1.50	0.52

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表 5 典型配合比试样50d力学性能

Table 5. Fiftieth day physical mechanical properties of typical mix proportion

试样编号	抗折强度/MPa	提高率/%	抗压强度/MPa	提高率/%	拉拔强度/MPa	提高率/%
o	0.56		3.69		0.162
A	1.86	232	16.26	340	0.168	3.7
B	2.46	339	13.20	257	0.541	233.0
D	3.27	483	15.45	318	0.610	276.0

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