Strength characteristics and microscopic mechanisms of loess improvement with phosphogypsum and polypropylene fibers

MENG Minqiang; WANG Mingze; LIU Yali; ZHANG Yuyang; LIU Guangyu; RU Han

doi:10.11835/j.issn.2096-6717.2024.117

您当前的位置：

首页 >

文章列表页 >

Strength characteristics and microscopic mechanisms of loess improvement with phosphogypsum and polypropylene fibers

Civil Engineering | 更新时间：2026-03-30

- Strength characteristics and microscopic mechanisms of loess improvement with phosphogypsum and polypropylene fibers
- Journal of Civil and Environmental Engineering Vol. 48, Issue 2, Pages: 70-79(2026)
- 作者机构：
  
  西北农林科技大学水利与建筑工程学院，陕西杨凌 712100
- 作者简介：
  
  MENG Minqiang (1991-), PhD, associate professor, main research interests: basic mechanical properties of soil and soil reinforcement and improvement technology, E-mial: mengmq@nwafu.edu.cn.
- 基金信息：
  
  National Natural Science Foundation of China(52108343);China Postdoctoral Science Foundation(2021M702689);The Shaanxi Provincial Natural Science Basic Research Program(2023-JC-QN-0790)
- DOI：10.11835/j.issn.2096-6717.2024.117
  CLC： TU444
- Received：28 July 2024，
  
  Published：25 April 2026
- 稿件说明：
移动端阅览
孟敏强,王铭泽,刘亚丽等.磷石膏协同聚丙烯纤维改良黄土的强度特性及其微观机理[J].土木与环境工程学报,2026,48(02):70-79.

MENG Minqiang,WANG Mingze,LIU Yali,et al.Strength characteristics and microscopic mechanisms of loess improvement with phosphogypsum and polypropylene fibers[J].Journal of Civil and Environmental Engineering,2026,48(02):70-79.
孟敏强,王铭泽,刘亚丽等.磷石膏协同聚丙烯纤维改良黄土的强度特性及其微观机理[J].土木与环境工程学报,2026,48(02):70-79. DOI： 10.11835/j.issn.2096-6717.2024.117.

MENG Minqiang,WANG Mingze,LIU Yali,et al.Strength characteristics and microscopic mechanisms of loess improvement with phosphogypsum and polypropylene fibers[J].Journal of Civil and Environmental Engineering,2026,48(02):70-79. DOI： 10.11835/j.issn.2096-6717.2024.117.

摘要

工业固废磷石膏能有效提升土体强度，但会增大土体脆性，而纤维加筋能改良土体的塑性，两种材料协同可形成互补。以陕西杨凌黄土为研究对象，通过无侧限抗压强度试验探究磷石膏改良黄土的最优掺量；基于最优掺量开展直剪试验，探究纤维加固磷石膏改良黄土的最优掺比；最后通过扫描电镜试验（SEM）探究磷石膏协同聚丙烯纤维改良黄土的微观机理。结果表明：单掺磷石膏改良加固黄土时，随着磷石膏质量占比的增大，改良后黄土的无侧限抗压强度先增大后减小，磷石膏掺入黄土的最优掺量为12%。基于磷石膏改良黄土的最优掺量掺入聚丙烯纤维发现，随着聚丙烯纤维掺量的增大，试样的峰值强度、黏聚力和残余强度均先增大后减小，内摩擦角持续增大；微观试验表明，磷石膏改良黄土和磷石膏协同聚丙烯纤维改良黄土均能增强土粒间的胶结作用，填充土粒间孔隙；聚丙烯纤维在黄土中会形成纤维团包裹土颗粒，从而为土粒提供拉应力，提升土样塑性。

Abstract

Phosphogypsum

as one of the industrial solid wastes

can enhance the soil strength but also increase the brittleness while the fiber reinforcement technique can improve the soil plasticity. The synergy between the two materials (phosphogypsum and fiber) can play a complementary role in improving the mechanical properties of soils. The loess from Yangling

Shaanxi Province

was used to explore the optimal mix ratio of phosphogypsum in the loess by unconfined compressive strength (UCS) tests. Then

the optimal mix ratio of fiber in the mixture of phosphogypsum and loess was investigated by the direct shear test based on the mixture ratio above. Finally

the microscopic mechanisms of loess improvement with phosphogypsum and polypropylene fibers were examined through scanning electron microscopy (SEM). The results showed that the loess UCS increases first and then decreases with an increase in the phosphogypsum mass when the phosphogypsum is mixed with the loess for reinforcement

and the optimal mix mass ratio of phosphogypsum in the loess is 12% in this study. The polypropylene fibers were then mixed into the mixture of phosphogypsum and loess based on the optimal mix mass ratio of phosphogypsum in the loess. It can be found that the peak strength

cohesion

and residual strength of the mixture sample increase first and then decrease

while the internal friction angle increases

with an increase in the polypropylene fiber content. The microscopic test results also indicated that the phosphogypsum-improved loess and phosphogypsum-polypropylene fiber-improved loess both significantly enhance the cementation and fill the voids among soil particles. Polypropylene fibers in loess can form fiber clumps to wrap the soil particles

thereby providing tensile stress and improving the plasticity for the soil sample.

关键词

Keywords

references

田威 , 李腾 , 贾能 , 等 . 木钙源EICP溶液固化路基黄土性能研究 [J ] . 材料导报 , 2022 , 36 ( 15 ): 78 - 85 .

TIAN W , LI T , JIA N , et al . Properties of subgrade loess solidified by calcium lignosulfonate-EICP solution [J ] . Materials Reports , 2022 , 36 ( 15 ): 78 - 85 . (in Chinese)

ZHAO M , CHEN L Y , WANG S Y , et al . Experimental study of the microstructure of loess on its macroscopic geotechnical properties of the Baozhong railway subgrade in Ningxia, China [J ] . Bulletin of Engineering Geology and the Environment , 2020 , 79 ( 9 ): 4829 - 4840 .

LIU J , TONG D , ZHENG Y X , et al . Carbon and air pollutant emissions from China’s cement industry 1990-2015: Trends, evolution of technologies, and drivers [J ] . Atmospheric Chemistry and Physics , 2021 , 21 ( 3 ): 1627 - 1647 .

薛志佳 , 李良辰 , 晏长根 , 等 . 公路工程湿软黄土路基施工能耗和碳排放评估 [J ] . 大连理工大学学报 , 2021 , 61 ( 5 ): 522 - 530 .

XUE Z J , LI L C , YAN C G , et al . Evaluation of energy consumption and carbon emissions for construction of wet and soft loess subgrade in highway engineering [J ] . Journal of Dalian University of Technology , 2021 , 61 ( 5 ): 522 - 530 . (in Chinese)

薛志佳 , 罗江 , 晏长根 , 等 . 矿渣-白泥固化黄土的力学性能与微观机理 [J ] . 中国公路学报 , 2024 , 37 ( 6 ): 181 - 192 .

XUE Z J , LUO J , YAN C G , et al . Mechanical properties and microscopic mechanism of slag-white mud solidified loess [J ] . China Journal of Highway and Transport , 2024 , 37 ( 6 ): 181 - 192 . (in Chinese)

XUE Z J , ZHANG Y , LUO J , et al . Analysis of compressive strength, durability properties, and micromechanisms of solidified loess using industrial solid waste: Slag-white mud-calcium carbide residue [J ] . Journal of Building Engineering , 2024 , 84 : 108511 .

DONG E L , FU S Y , WU C Q , et al . Value-added utilization of phosphogypsum industrial by-products in producing green ultra-high performance concrete: Detailed reaction kinetics and microstructure evolution mechanism [J ] . Construction and Building Materials , 2023 , 389 : 131726 .

MURALI G , AZAB M . Recent research in utilization of phosphogypsum as building materials: Review [J ] . Journal of Materials Research and Technology , 2023 , 25 : 960 - 987 .

YANG J , ZENG J Y , HE X Y , et al . Sustainable clinker-free solid waste binder produced from wet-ground granulated blast-furnace slag, phosphogypsum and carbide slag [J ] . Construction and Building Materials , 2022 , 330 : 127218 .

熊雨 , 邓华锋 , 彭萌 , 等 . 四种人工合成纤维加筋黄土的抗剪特性 [J ] . 长江科学院院报 , 2022 , 39 ( 1 ): 122 - 126, 133 .

XIONG Y , DENG H F , PENG M , et al . Shear properties of loess reinforced with four synthetic fibers [J ] . Journal of Yangtze River Scientific Research Institute , 2022 , 39 ( 1 ): 122 - 126, 133 . (in Chinese)

赵之 , 杨秀娟 , 石庆红 , 等 . 磷石膏/木质素固化铅污染土的无侧限抗压强度 [J ] . 土木与环境工程学报(中英文) , 2025 , 47 ( 1 ): 89 - 99 .

ZHAO Z , YANG X J , SHI Q H , et al . Unconfined compressive strength of phosphogypsum/lignin solidified lead contaminated soil [J ] . Journal of Civil and Environmental Engineering , 2025 , 47 ( 1 ): 89 - 99 . (in Chinese)

王应富 , 张树光 , 黄啸 , 等 . 磷石膏-钢渣-矿渣固化低液限粉质黏土力学性能及耐久性能研究 [J ] . 土木工程学报 , 2023 , 56 ( 增刊1 ): 12 - 23 .

WANG Y F , ZHANG S G , HUANG X , et al . Mechanical property and durability of low liquid limit silty clay solidified by phosphogypsum-steel slag-ground granulated blast-furnace slag [J ] . China Civil Engineering Journal , 2023 , 56 ( Sup 1 ): 12 - 23 . (in Chinese)

REN Z S , WANG L , WANG H , et al . Solidification/stabilization of lead-contaminated soils by phosphogypsum slag-based cementitious materials [J ] . Science of the Total Environment , 2023 , 857 : 159552 .

WU Z P , XU J , FAN H H , et al . Experimental study on dry-wet durability and water stability properties of fiber-reinforced and geopolymer-stabilized loess [J ] . Construction and Building Materials , 2024 , 418 : 135379 .

WANG H M , NI W K , YUAN K Z . Mechanical properties, microstructural evolution, and environmental impacts of recycled polypropylene fiber stabilized loess [J ] . Construction and Building Materials , 2023 , 400 : 132850 .

KHODABANDEH M A , NAGY G , TÖRÖK Á . Stabilization of collapsible soils with nanomaterials, fibers, polymers, industrial waste, and microbes: Current trends [J ] . Construction and Building Materials , 2023 , 368 : 130463 .

杨雄杰 , 寇轩 , 常超 , 等 . 石灰粉煤灰稳定再生料基层级配设计与力学性能研究 [J ] . 市政技术 , 2024 , 42 ( 5 ): 40 - 46 .

YANG X J , KOU X , CHANG C , et al . Study on base gradation design and mechanical properties of lime-fly ash stabilized recycled materials [J ] . Journal of Municipal Technology , 2024 , 42 ( 5 ): 40 - 46 . (in Chinese)

王瑞彩 , 吴腾 . 改良垃圾焚烧底渣固化疏浚淤泥性能试验研究 [J ] . 河海大学学报(自然科学版) , 2024 , 52 ( 1 ): 93 - 100 .

WANG R C , WU T . Experimental study on the performance of solidified dredged sludge by improved municipal solid waste incineration bottom ash [J ] . Journal of Hohai University (Natural Sciences) , 2024 , 52 ( 1 ): 93 - 100 . (in Chinese)

FENG M W , WANG J , LIU S , et al . Coupling effect of curing temperature and relative humidity on the unconfined compressive strength of xanthan gum-treated sand [J ] . Construction and Building Materials , 2024 , 448 : 138224 .

徐洪钟 , 王沐婉 , 沐红元 , 等 . 微生物诱导碳酸钙沉积加固剧烈砂化白云岩实验研究 [J ] . 清华大学学报(自然科学版) , 2024 , 64 ( 7 ): 1168 - 1178 .

XU H Z , WANG M W , MU H Y , et al . Experiment study on reinforcement of heavily sandy dolomite by microbially induced carbonate precipitation [J ] . Journal of Tsinghua University (Science and Technology) , 2024 , 64 ( 7 ): 1168 - 1178 . (in Chinese)

安宁 , 晏长根 , 王亚冲 , 等 . 聚丙烯纤维加筋黄土抗侵蚀性能试验研究 [J ] . 岩土力学 , 2021 , 42 ( 2 ): 501 - 510 .

AN N , YAN C G , WANG Y C , et al . Experimental study on anti-erosion performance of polypropylene fiber-reinforced loess [J ] . Rock and Soil Mechanics , 2021 , 42 ( 2 ): 501 - 510 . (in Chinese)

贾卓龙 , 梁哲瑞 , 晏长根 , 等 . 聚丙烯纤维加筋黄土抗渗性能试验研究 [J ] . 工程地质学报 , 2025 , 33 ( 1 ): 875 - 885 .

JIA Z L , LIANG Z R , YAN C G , et al . Experimental Study on Impermeability of Polypropylene Fiber Reinforced Loess [J ] . Journal of Engineering Geology , 2025 , 33 ( 1 ): 875 - 885 . (in Chinese)

贾卓龙 , 晏长根 , 包含 , 等 . 生物胶-纤维固化黄土的三轴剪切特性研究 [J ] . 中国公路学报 , 2024 , 37 ( 6 ): 122 - 131 .

JIA Z L , YAN C G , BAO H , et al . Triaxial shear characteristics of biological gum-fiber-reinforced loess [J ] . China Journal of Highway and Transport , 2024 , 37 ( 6 ): 122 - 131 . (in Chinese)

卢浩 , 晏长根 , 贾卓龙 , 等 . 聚丙烯纤维加筋黄土的抗剪强度和崩解特性 [J ] . 交通运输工程学报 , 2021 , 21 ( 2 ): 82 - 92 .

LU H , YAN C G , JIA Z L , et al . Shear strength and disintegration properties of polypropylene fiber-reinforced loess [J ] . Journal of Traffic and Transportation Engineering , 2021 , 21 ( 2 ): 82 - 92 . (in Chinese)

ROSHAN K , CHOOBBASTI A J , KUTANAEI S S , et al . The effect of adding polypropylene fibers on the freeze-thaw cycle durability of lignosulfonate stabilised clayey sand [J ] . Cold Regions Science and Technology , 2022 , 193 : 103418 .

李云鹏 , 林一芃 , 张晶旭 . 基于反复直剪试验的强膨胀土强度特性研究 [J ] . 河北地质大学学报 , 2024 , 47 ( 1 ): 86 - 91 .

LI Y P , LIN Y P , ZHANG J X . Study on strength characteristics of strong expansive soil based on repeated direct shear test [J ] . Journal of Hebei GEO University , 2024 , 47 ( 1 ): 86 - 91 . (in Chinese)

刘新荣 , 郭雪岩 , 周小涵 , 等 . 库岸危岩剪切带-基岩界面宏细观剪切贯通机制及力学特性研究 [J ] . 岩石力学与工程学报 , 2024 , 43 ( 5 ): 1096 - 1109 .

LIU X R , GUO X Y , ZHOU X H , et al . Study on macro-meso shear transfixion mechanisms and mechanical properties of shear band-bedrock interfaces of dangerous rock on reservoir bank [J ] . Chinese Journal of Rock Mechanics and Engineering , 2024 , 43 ( 5 ): 1096 - 1109 . (in Chinese)

吕玺琳 , 钟启锋 , 颜建春 , 等 . 不同初始饱和度条件下高液限滑带土环剪试验 [J ] . 工程地质学报 , 2024 , 32 ( 2 ): 370 - 377 .

LÜ X L , ZHONG Q F , YAN J C , et al . Ring shear test of high liquid limit sliding zone soil under different initial saturation [J ] . Journal of Engineering Geology , 2024 , 32 ( 2 ): 370 - 377 . (in Chinese)

胡再强 , 林山 , 李宏儒 , 等 . 洛川Q 2 黄土残余强度影响因素试验研究 [J ] . 岩土工程学报 , 2017 , 39 ( 增刊1 ): 6 - 11 .

HU Z Q , LIN S , LI H R , et al . Factors residual strength of Luochuan loess [J ] . Chinese Journal of Geotechnical Engineering , 2017 , 39 ( Sup1 ): 6 - 11 . (in Chinese)

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Strength characteristics and environmental effects of red mud-based cementitious material activated with calcium carbide slag-phosphogypsum

Preparation and filling effect verification of phosphogypsum particles

Unconfined compressive strength of phosphogypsum/lignin solidified lead contaminated soil

Variation behavior of pore water pressure in loess deep filled ground

Related Author

LI Xiang

GUO Rongxin

LIU Zhuo

LV Wei

HUANG Wan

TAN Yunzhi

CHEN Junlian

WU Chiqiu

Related Institution

Faculty of Civil Engineering and Mechanics

Yunnan Key Laboratory of Disaster Reduction in Civil Engineering

International Joint Laboratory for Green Construction and Intelligent Maintenance of Yunnan Province, Kunming University of Science and Technology

Yichang Key Laboratory of the Resources Utilization for Problematic Soils, China Three Gorges University

Hubei Changyao New Materials Co., Ltd.

AI问答

Address：Journals Department, Chongqing University, 174 Shazhengjie, Chongqing 400044, P.R.China Postal code：400044
Tel：+86-23-65111322 Email：xuebao@cqu.edu.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰