Experimental Study on Ecological Performance Improvement of Sprayed Planting Concrete Based on the Addition of Polymer Composite Material

Lai, Haoqiang; Du, Jiaxin; Zhou, Cuiying; Liu, Zhen

doi:10.3390/ijerph191912121

Cited by 8 publications

(10 citation statements)

References 27 publications

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“…As an environment-friendly material, planting concrete (PC) can be used for slope protection to avoid the direct damage of the load to the subsoil of PC, but to also reduce the loss rate of the subsoil of the PC and increase the shear resistance of the soil [1]. Traditional planting concrete (PC) uses ordinary Portland cement (OPC) as the cementitious material.…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Silicon Sources on the Properties of Geopolymer Planting Concrete Mixed with Red Mud

Chen

2023

Sustainability

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In order to reduce the carbon emission of planting concrete in the process of preparation, and to realize the application of large amounts of red mud in the geopolymer, in this study, high silicon source materials and blast furnace slag are added to a large content of red mud base geopolymer planting concrete, which can remove the dependence of planting concrete on ordinary Portland cement and provide a new direction for the comprehensive utilization of red mud. In the paper, the effects of different A (Alkali solid content)/P (Powder dosage) and high silica sources (silica fume and diatomite) on the microstructure and fluidity of the geopolymer, as well as the compressive strength, pore characteristics, and alkalinity of the planting concrete, are comparatively evaluated. The corresponding results showed that when A/P was 0.25, the planting performance of the planting concrete would be reduced due to its high alkalinity; when A/P was 0.15, the planting concrete would have its sedimentation and the compressive strength decreased. On the other hand, the pozzolanic reaction among the silica fume, diatomite, and Ca(OH)2 significantly weakened the alkali pan phenomenon in the later stage of planting concrete formation. The addition of an appropriate amount of silica fume and diatomite also made the structure of the geopolymer more compact with better fluidity, which yielded superior pore characteristics and planting performance for the planting concrete. For good planting concrete pore characteristics, the test results showed that the fluidity of the mortar should be 112–128 mm. Overall, the best planting concrete performance was achieved at an A/P ratio of 0.2, with the contents of silica fume and diatomite being 10% and 5%, respectively. Furthermore, the slope finite element analysis showed that planting concrete made with red mud geopolymer had better slope protection potential than ordinary Portland cement.

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Section: Introductionmentioning

confidence: 99%

Effects of Different Silicon Sources on the Properties of Geopolymer Planting Concrete Mixed with Red Mud

Chen

2023

Sustainability

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“…Rock cut slope (RCS), which is created by anthropogenic activity (e.g., mining and transportation construction) in mountainous areas, is a type of steep and bare artificial rock face (Chen et al 2022;Huang 2005;Li et al 2018a;Yan et al 2022;Yang et al 2016;Yuan et al 2006;Zhao et al 2020). As an extremely degraded ecosystem, the formation of RCSs not only impairs regional ecological functions as a result of soil and water loss aggravation, landscape fragmentation and the potential risk of natural disaster increments, but also threatens regional biodiversity and sustainable development (Chen et al 2022;Lai et al 2022;Lee et al 2013;Li et al 2018aLi et al , 2022Liu et al 2014). To restore ecosystems on RCSs, numerous artificial restoration techniques using artificial soil and metal mesh, such as vegetation concrete foundation spraying, external-soil spray seeding and hydraulic covering, have been adopted (Chen et al 2022;Lai et al 2022;Li et al 2018a;Xu et al 2015;Yan et al 2022).…”

Section: Introductionmentioning

confidence: 99%

“…As an extremely degraded ecosystem, the formation of RCSs not only impairs regional ecological functions as a result of soil and water loss aggravation, landscape fragmentation and the potential risk of natural disaster increments, but also threatens regional biodiversity and sustainable development (Chen et al 2022;Lai et al 2022;Lee et al 2013;Li et al 2018aLi et al , 2022Liu et al 2014). To restore ecosystems on RCSs, numerous artificial restoration techniques using artificial soil and metal mesh, such as vegetation concrete foundation spraying, external-soil spray seeding and hydraulic covering, have been adopted (Chen et al 2022;Lai et al 2022;Li et al 2018a;Xu et al 2015;Yan et al 2022). These techniques can rapidly create a simple "soil-vegetation" system on RCS (Chen et al 2022;Huang et al 2022;Li et al 2018a;Yang et al 2016;Zhao et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Effect of crevice density on biological soil crust development on rock cut slope in mountainous regions, Sichuan, China

Zhao

Du³

et al. 2023

Ecol Process

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Background The rock cut slope (RCS) could cause damage to regional ecological functions and landscapes and requires recovery. Biological soil crusts (BSCs) are pioneer and dominant colonizers during the initial recovery stage. To accelerate the natural recovery of RCS, the development process and influencing agents of BSC should be revealed. Thus, the area index of crevices (IR), BSC coverage (COV) and biomass (BM), soil weight (SW), and major soil nutrients [organic carbon (OC), total nitrogen (TN) and total phosphorus (TP)] content, collected from 164 quadrats on 13 RCSs in the mountainous area of west Sichuan Province, China, were measured, to explore the effect of crevice of RCS on BSC development. Results Soil OC, TN and TP on RCSs ranged from 18.61 to 123.03 g kg−1, 0.96 to 6.02 g kg−1 and 0.52 to 2.46 g kg−1, respectively, and were approximately to or higher than those on natural slopes. The OC, TN and TP contents in soils elevated unsystematically with recovery time of RCSs. BSCs on RCS distributed along crevices generally and firstly. During the first 13 years of natural recovery, COV, BM and SW ranged from 6.5 to 28.2%, 14.43 to 67.25 g m−2, and 127.69 to 1277.74 g m−2, respectively. COV, BM and SW increased linearly with IR on RCSs. The positive correlation between COV and BM and IR was insignificantly impacted by bedrock, slope aspect and altitude within the recovery time less than 13 years. COV and BM on RCSs increased significantly when the recovery time is more than 27 years. Conclusions Crevice on RCSs could be a major environmental factor which is conducive to BSC development and soil accumulation through creating a space for water and soil particle. Furthermore, with the increase of recovery time of RCSs, BSCs may grow and reach a stable state with the promotion of soil nutrients, plant growth and microbial activity. These results provide a development process of BSC that from inside to outside the crevices on RCSs. In the areas with stable rock strata and a low risk of geological disasters, purposeful improvement in crevice density on RCS may effectively accelerate BSC development.

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“…In addition, the availability of freshwater of acceptable quality is the driving force to achieve Goals 2, 3, 8, and 9 (i.e., zero hunger; good health and well-being; decent work and economic growth; and industry, innovation, and infrastructure) [2]. Moreover, preventing and controlling pollution that can spread because of the improper management of solid wastes and wastewater is a key aspect of achieving Goals 11,14,15,and 17 (i.e., sustainable cities and communities; life below water; life on Earth; and partnership for goals) [2]. Hence, several efforts are being carried out worldwide that aim to ensure the sustainable provision of water with acceptable quality by preventing and controlling the pollution of surface and ground waters.…”

Section: Introductionmentioning

confidence: 99%

“…Conventional cement-based materials are heavily used in the construction sector and in environmental protection and restoration. In particular, the application of these materials in environmental protection encompass many fields, including rock repair and enforcement, the design of disposal facilities for hazardous and radioactive wastes, the stabilization and solidification of hazardous and radioactive contaminants, and water and wastewater treatment [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. This wide range of applications is supported by the low cost of these materials and their availability, the accumulated knowledge and experience from operating these materials, and the ease of engineering the hardened materials that ensures the attainment of the required performances.…”

Section: Introductionmentioning

confidence: 99%

Permeable Concrete Barriers to Control Water Pollution: A Review

Abdel Rahman,

El-Kamash,

Hung

2023

Water

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Permeable concrete is a class of materials that has long been tested and implemented to control water pollution. Its application in low-impact development practices has proved its efficiency in mitigating some of the impacts of urbanization on the environment, including urban heat islands, attenuation of flashfloods, and reduction of transportation-related noise. Additionally, several research efforts have been directed at the dissemination of these materials for controlling pollution via their use as permeable reactive barriers, as well as their use in the treatment of waste water and water purification. This work is focused on the potential use of these materials as permeable reactive barriers to remediate ground water and treat acid mine drainage. In this respect, advances in material selection and their proportions in the mix design of conventional and innovative permeable concrete are presented. An overview of the available characterization techniques to evaluate the rheology of the paste, hydraulic, mechanical, durability, and pollutant removal performances of the hardened material are presented and their features are summarized. An overview of permeable reactive barrier technology is provided, recent research on the application of permeable concrete technology is analyzed, and gaps and recommendations for future research directions in this field are identified. The optimization of the mix design of permeable reactive concrete barriers is recommended to be directed in a way that balances the performance measures and the durability of the barrier over its service life. As these materials are proposed to control water pollution, there is a need to ensure that this practice has minimal environmental impacts on the affected environment. This can be achieved by considering the analysis of the alkaline plume attenuation in the downstream environment.

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Experimental Study on Ecological Performance Improvement of Sprayed Planting Concrete Based on the Addition of Polymer Composite Material

Cited by 8 publications

References 27 publications

Effects of Different Silicon Sources on the Properties of Geopolymer Planting Concrete Mixed with Red Mud

Effects of Different Silicon Sources on the Properties of Geopolymer Planting Concrete Mixed with Red Mud

Effect of crevice density on biological soil crust development on rock cut slope in mountainous regions, Sichuan, China

Permeable Concrete Barriers to Control Water Pollution: A Review

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