HEPF流态固化轻质土耐久性能研究

谢天胜; 郑志明; 郝德军; 王珺; 于歆晨; 刘亚珍; 张昕毅

doi:10.20265/j.cnki.issn.1007-2993.2024-0399

HEPF流态固化轻质土耐久性能研究

doi: 10.20265/j.cnki.issn.1007-2993.2024-0399

1.
济商高速公路（菏泽）有限公司，山东菏泽　274000
2.
中国公路工程咨询集团有限公司，北京　100088
3.
山东大学，山东济南　250100

基金项目: 国家重点研发计划（2022YFB2602102）

详细信息

作者简介:
谢天胜，男，1992年生，硕士，工程师，主要从事公路工程项目建设管理。E-mail：972782312@qq.com

通讯作者:
王　珺，女，1997年生，博士。研究方向：绿色建筑材料。E-mail：wang.jun@mail.sdu.edu.cn

中图分类号: U416.1
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出版历程
- 收稿日期: 2024-08-31
- 修回日期: 2024-11-22
- 录用日期: 2025-01-02
- 刊出日期: 2025-10-10

Durability of HEPF fluid-solidified lightweight soil

1.
Jishang Expressway (Heze) Co., Ltd., Heze 274000, Shandong, China
2.
China Highway Engineering Consulting Group Co., Ltd., Beijing 100088, China
3.
Shandong University, Jinan 250100, Shandong, China

摘要

摘要: 为进一步提高泡沫轻质土的吸能减震效果和工程安全性，制备了新型高弹聚合物纤维（Highly Elastic Polymers Fiber，简称HEPF）流态固化轻质土材料，并通过试验分析了其水稳定性、抗渗性、抗冻融性和疲劳加载特性。试验结果表明，掺入高弹聚合物和纤维的HEPF流态固化轻质土较普通泡沫轻质土在材料的水稳定性、抗水渗透性和抗冻性能方面表现出显著优势。当高弹聚合物掺量10%、纤维掺量0.2%时，材料的水稳定系数均达到0.98以上，渗水压力较对照组提升了50%~150%，抗冻性系数显著提高。此外，材料在疲劳加载试验中展现出良好的耐久性和抗裂性能，有效地延长了其使用寿命。研究结果验证了HEPF流态固化轻质土在工程应用中的优越性能，证明其在交通荷载循环振动等恶劣条件下，具有良好的耐久性和环境适应性。
- 流态固化轻质土 /
- 高弹聚合物 /
- 耐久性 /
- 疲劳加载
Abstract: To further improve the energy absorption and shock absorption effects of foam light soil and enhance engineering safety, a novel Highly Elastic Polymer Fiber (HEPF) fluid-solidified lightweight soil material was developed. A series of tests were conducted to analyze its water stability, impermeability, freeze-thaw resistance, and fatigue loading characteristics. The test results show that HEPF fluid-solidified light soil, containing high elastic polymer and fiber, offers significant advantages in improving water stability, water permeability resistance, and frost resistance compared to common foam light soil. When the content of high-elastic polymer is 10% and the fiber content is 0.2%, the water stability coefficient exceeds 0.98, the seepage pressure increases by 50% to 150% compared to the control group, and the frost resistance coefficient significantly improves. Additionally, the material demonstrated good durability and crack resistance in fatigue loading tests, effectively extending its service life. The research findings validate the superior performance of HEPF fluid-solidified light soil in engineering applications, confirming its good durability and environmental adaptability under harsh conditions, such as traffic loads and cyclic vibrations.
- fluid-solidified lightweight soil /
- high elastic polymer /
- durability /
- fatigue loading

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图 1 高弹聚合物颗粒

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图 2 聚丙烯纤维

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图 3 试件制备流程

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图 4 抗渗试验图

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图 5 疲劳加载试验图

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图 6 水稳定性系数随不同因素变化规律图

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图 7 渗水压力随高弹聚合物掺量变化规律图

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图 8 抗冻性系数随湿密度变化规律图

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图 9 试件位移变化随频率变化规律图

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图 10 试件位移变化随中位应力变化规律图

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图 11 试件位移变化随振幅变化规律图

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图 12 试件位移随加载次数变化规律图

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图 13 对照组及HEPF流态固化轻质土疲劳加载试验位移变化规律图

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图 14 对照组及HEPF流态固化轻质土疲劳加载试验试件裂缝情况图

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表 1 P.O 42.5水泥物理力学性能

密度 /(kg∙m⁻³)	标准稠度/%	凝结时间/min		3 d抗压强度 /MPa	3 d抗折强度 /MPa	28 d抗压强度 /MPa	28 d抗折强度 /MPa
密度 /(kg∙m⁻³)	标准稠度/%	初凝	终凝	3 d抗压强度 /MPa	3 d抗折强度 /MPa	28 d抗压强度 /MPa	28 d抗折强度 /MPa
3100	28.5	173	201	21.2	6.9	54.3	10.1

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表 2 水泥的化学成分及性能

成分	CaO	SiO₂	Al₂O₃	Fe₂O₃	MgO	SO₃	总碱量	烧失量
含量 /%	64.3	21.6	4.73	3.68	2.59	0.3	0.63	2.89

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表 3 高弹聚合物颗粒主要技术参数

密度 /(kg∙m⁻³)	加热减量 /%	灰分 /%	含铁量 /%	纤维掺量/%	筛余物 /%
750	0.62	8.75	0.029	0	0.014

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表 4 聚丙烯纤维主要技术参数

抗拉强度 /MPa	弹性模量 /GPa	拉伸极限/%	纤维直径 /μm	比重	吸水性	抗低温性	抗酸碱性	导热性
>486	>4.8	>15	18～48	0.91	无	强	高	低

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表 5 试验参数表

试验	频率/Hz	中位应力 /MPa	振幅/%	次数
频率试验	1, 3, 5	0.4	30	10000
振幅试验	5	0.4	20, 30, 40	10000
中位应力试验	5	0.2, 0.4, 0.6	30	10000
次数试验	5	0.4	30	10000, 30000, 50000

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表 6 两种工况下疲劳加载试验的位移变化量

对照组		HEPF流态固化轻质土
位移最小	位移最大	位移最小	位移最大
0.659%	0.765%	0.441%	0.483%
注：中位应力：0.4MPa ；频率：3Hz ；振幅：30% ；次数：10000次。

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