工业废料稳定路基土的无侧限抗压强度及环境影响评价

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (11): 3865-3875.

工业废料稳定路基土的无侧限抗压强度及环境影响评价

赵卫琪¹, 方睿², 周浩¹, 李娜¹, 姜屏¹

1.绍兴文理学院土木工程学院,绍兴 312000;
2.同创工程设计有限公司,绍兴 312000

收稿日期:2021-05-10 修回日期:2021-06-06 出版日期:2021-11-15 发布日期:2021-12-08
通讯作者: 李娜,副教授。E-mail:lina@usx.edu.cn
作者简介:赵卫琪(1996—),男,硕士研究生。主要从事软土地基加固与处理方面的研究。E-mail:zhaoweiqi202105@163.com
基金资助:
国家自然科学基金(41772311);岩土力学与工程国家重点实验室开放基金(Z017013)

Unconfined Compressive Strength and Environmental Impact Assessment of Industrial Waste Stabilized Roadbed Soil

ZHAO Weiqi¹, FANG Rui², ZHOU Hao¹, LI Na¹, JIANG Ping¹

1. School of Civil Engineering, Shaoxing University, Shaoxing 312000, China;
2. Tongchuang Engineering Design Co., Ltd., Shaoxing 312000, China

Received:2021-05-10 Revised:2021-06-06 Online:2021-11-15 Published:2021-12-08

摘要/Abstract

摘要： 随着社会的发展,道路工程建设规模日益庞大,常用的石灰、水泥等固化剂价格较高,然而电石渣、粉煤灰这两种工业废料应用于道路建设中,将很好地提高资源的回收再利用率,同时降低建设成本。本文研究了电石渣和粉煤灰固化土的最优配合比,并探讨了电石渣代替石灰用于固化土的可行性,另外,在电石渣-粉煤灰固化土中掺入聚丙烯纤维,探究了聚丙烯纤维的最优掺量。无侧限抗压试验结果表明,电石渣与粉煤灰的最优配比为1:1,聚丙烯纤维的最优掺量为0.6%(质量分数)。在此基础上探究了电石渣-粉煤灰固化土在雨淋条件下对环境的影响程度。pH试验结果表明,电石渣-粉煤灰固化土的pH值最大为12.28,其环境影响程度满足国家标准规范要求,可以在实际工程中得以应用。此研究为工业废料应用于道路基层提供了一定的借鉴意义。

关键词: 电石渣, 粉煤灰, 聚丙烯纤维, 无侧限抗压, pH试验, 环境影响, 固化土

Abstract: With the development of modern society, the scale of road engineering construction is becoming larger and larger, and the price of commonly used curing agents such as lime and cement is high. It is a good way to apply calcium carbide residue (CCR) and fly ash (FA) to road construction, which can not only improve the recycling rate of resources, but also reduce the construction cost. In this paper, the optimum mix proportion of CCR and FA in solidified soil was explored, and the feasibility of CCR replacing lime to solidify soil was discussed. In addition, adding polypropylene fiber into the CCR-FA solidified soil can further improve the mechanical properties of CCR-FA solidified soil, so would also be explored the optimal content of polypropylene fiber. The results of the unconfined compression test show that the optimal ratio of CCR and FA is 1:1, and the optimal content of polypropylene fiber is 0.6% (mass fraction). On this basis, the impact of CCR-FA solidified soil on the environment under rain conditions was investigated. The pH test results demonstrate that the maximum pH value of CCR-FA solidified soil is 12.28, which meets the requirements of national standards and can be applied in actual projects. The research results serve as a solid foundation in utilizing industrial waste as road base materials.

Key words: calcium carbide residue, fly ash, polypropylene fiber, unconfined compression test, pH test, environmental effect, solidified soil

中图分类号:

TU411.6

赵卫琪, 方睿, 周浩, 李娜, 姜屏. 工业废料稳定路基土的无侧限抗压强度及环境影响评价[J]. 硅酸盐通报, 2021, 40(11): 3865-3875.

ZHAO Weiqi, FANG Rui, ZHOU Hao, LI Na, JIANG Ping. Unconfined Compressive Strength and Environmental Impact Assessment of Industrial Waste Stabilized Roadbed Soil[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(11): 3865-3875.

参考文献

[1] MOHAMMADINIA A, ARULRAJAH A, SANJAYAN J, et al. Stabilization of demolition materials for pavement base/subbase applications using fly ash and slag geopolymers: laboratory investigation[J]. Journal of Materials in Civil Engineering, 2016, 28(7): 04016033.
[2] LIU Y, HE L Q, JIANG Y J, et al. Effect of in situ water content variation on the spatial variation of strength of deep cement-mixed clay[J]. Géotechnique, 2019, 69(5): 391-405.
[3] 程津,谭彬,虞秀勇,等.低温条件下硫铝酸盐水泥砂浆的电养护[J].硅酸盐通报,2020,39(2):447-452.
CHENG J, TAN B, YU X Y, et al. Electric curing of sulphoaluminate cement mortar in low temperature environment[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(2): 447-452 (in Chinese).
[4] ZHAO Y, SOLTANI A, TAHERI A, et al. Application of slag-cement and fly ash for strength development in cemented paste backfills[J]. Minerals, 2018, 9(1): 22.
[5] ROSONE M, CELAURO C, FERRARI A. Microstructure and shear strength evolution of a lime-treated clay for use in road construction[J]. International Journal of Pavement Engineering, 2020, 21(9): 1147-1158.
[6] MAHEDI M, CETIN B, WHITE D J. Cement, lime and fly ashes in stabilizing expansive soils: performance evaluation and comparison[J]. Journal of Materials in Civil Engineering, 2020, 32(7): 04020177.
[7] INDIRAMMA P, SUDHARANI C, NEEDHIDASAN S. Utilization of fly ash and lime to stabilize the expansive soil and to sustain pollution free environment: an experimental study[J]. Materials Today: Proceedings, 2020, 22: 694-700.
[8] HUANG Y Y, XU C, LI H X, et al. Utilization of the black tea powder as multifunctional admixture for the hemihydrate gypsum[J]. Journal of Cleaner Production, 2019, 210: 231-237.
[9] LI G X, ZHANG A, SONG Z P, et al. Ground granulated blast furnace slag effect on the durability of ternary cementitious system exposed to combined attack of chloride and sulfate[J]. Construction and Building Materials, 2018, 158: 640-648.
[10] LIU T J, SONG W, ZOU D J, et al. Dynamic mechanical analysis of cement mortar prepared with recycled cathode ray tube (CRT) glass as fine aggregate[J]. Journal of Cleaner Production, 2018, 174: 1436-1443.
[11] PHUMMIPHAN I, HORPIBULSUK S, PHOO-NGERNKHAM T, et al. Marginal lateritic soil stabilized with calcium carbide residue and fly ash geopolymers as a sustainable pavement base material[J]. Journal of Materials in Civil Engineering, 2017, 29(2): 04016195.
[12] HANJITSUWAN S, PHOO-NGERNKHAM T, LI L Y, et al. Strength development and durability of alkali-activated fly ash mortar with calcium carbide residue as additive[J]. Construction and Building Materials, 2018, 162: 714-723.
[13] KAMPALA A, HORPIBULSUK S, PRONGMANEE N, et al. Influence of wet-dry cycles on compressive strength of calcium carbide residue-fly ash stabilized clay[J]. Journal of Materials in Civil Engineering, 2014, 26(4): 633-643.
[14] 余保英,周建伟,孔亚宁,等.PVA纤维长度对超高韧性水泥基复合材料力学性能的影响[J].硅酸盐通报,2020,39(11):3425-3431.
YU B Y, ZHOU J W, KONG Y N, et al. Effect of PVA fiber length on mechanical properties of ultra-high toughness cementitious composites[J]. Bulletin of the Chinese Ceramic Society, 2020, 39(11): 3425-3431 (in Chinese).
[15] SHARMA R K. Laboratory study on stabilization of clayey soil with cement kiln dust and fiber[J]. Geotechnical and Geological Engineering, 2017, 35(5): 2291-2302.
[16] 蒋志琳,王崇淦,肖伟,等.纤维加筋土无侧限抗压强度试验及数值分析[J].铁道科学与工程学报,2020,17(6):1404-1410.
JIANG Z L, WANG C G, XIAO W, et al. Laboratory investigation and numerical simulation of unconfined compressive strength of glass fiber reinforced soil[J]. Journal of Railway Science and Engineering, 2020, 17(6): 1404-1410 (in Chinese).
[17] DUAN X L, ZHANG J S. Mechanical properties, failure mode, and microstructure of soil-cement modified with fly ash and polypropylene fiber[J]. Advances in Materials Science and Engineering, 2019, 2019: 1-13.
[18] 曾军,彭学先,阮波,等.聚丙烯纤维红黏土无侧限抗压强度试验研究[J].铁道科学与工程学报,2015,12(3):545-550.
ZENG J, PENG X X, RUAN B, et al. Experimental study on unconfined compressive strength of polypropylene fiber reinforced red clay[J]. Journal of Railway Science and Engineering, 2015, 12(3): 545-550 (in Chinese).
[19] WANG W, ZHANG C, GUO J, et al. Investigation on the triaxial mechanical characteristics of cement-treated subgrade soil admixed with polypropylene fiber[J]. Applied Sciences, 2019, 9(21): 4557.
[20] JIANG P, LV S W, WANG Y, et al. Investigation on direct shear and energy dissipation characteristics of iron tailings powder reinforced by polypropylene fiber[J]. Applied Sciences, 2019, 9(23): 5098.
[21] 中华人民共和国住房和城乡建设部.土工试验方法标准:GB/T 50123—2019[S].北京:中国计划出版社,2019.
Ministry of Housing and Urban-Rural Development, PRC. Geotechnical test method standard: GB/T 50123—2019[S]. Beijing: China Planning Press, 2019 (in Chinese).
[22] ELKHEBU A, ZAINORABIDIN A, ASADI A, et al. Effect of incorporating multifilament polypropylene fibers into alkaline activated fly ash soil mixtures[J]. Soils and Foundations, 2019, 59(6): 2144-2154.
[23] TIWARI N, SATYAM N, SINGH K. Effect of curing on micro-physical performance of polypropylene fiber reinforced and silica fume stabilized expansive soil under freezing thawing cycles[J]. Scientific Reports, 2020, 10: 7624.
[24] SAYGILI A, DAYAN M. Freeze-thaw behavior of lime stabilized clay reinforced with silica fume and synthetic fibers[J]. Cold Regions Science and Technology, 2019, 161: 107-114.
[25] KUMAR J S, SHARMA P. Geotechnical properties of pond ash mixed with cement kiln dust and polypropylene fiber[J]. Journal of Materials in Civil Engineering, 2018, 30(8): 04018154.