Study on frost resistance and vegetation performance of seashell waste pervious concrete in cold area

Wang, Dongli; Zhao, Qingxin; Yang, Chi; Chi, Yaao; Qi, Wenyue; Teng, Zhenchao

doi:10.1016/j.conbuildmat.2020.120758

Cited by 19 publications

(8 citation statements)

References 17 publications

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“…The effect of biomass aggregate and solid waste aggregate on frost resistance is a complex issue, and the practical application process affects concrete in many ways. As a result, it is necessary to consider the type of biomass aggregate, the handling method, and the concrete mix ratio [36][37][38][39][40].…”

Section: Frost Resistancementioning

confidence: 99%

Mechanical properties, thermal properties and durability of lightweight thermal insulation recycled concrete

Xu,

Pan,

et al. 2024

Preprint

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To improve forestry solid waste reuse, reduce building energy consumption, and increase building capacity, preparing lightweight concrete with new materials has gained recent attention. This paper used waste wood and expanded perlite (EP) to design lightweight thermal insulation recycled concrete (LTIRC) with different volume admixtures. Compared to mineral aggregate, wood aggregate (WA) and EP show large differences in water absorption, particle morphology, density, and crushing index. Therefore, this paper comprehensively evaluated the dry density, mechanical properties, thermal properties, chloride ion permeability, and frost resistance of LTIRC. The results showed WA and EP introduction effectively reduced concrete bulk weight and met the dry density standard for lightweight concrete. Regarding thermal insulation performance, both WA and EP are characterized by porous, low–density, and low thermal conductivity. Consequently, LTIRC thermal conductivity was reduced by up to 76.5% versus conventional concrete, effectively increasing resistance to heat flow through concrete and providing potential for building energy savings. Additionally, WA and EP addition caused LTIRC to experience mechanical and durability property deterioration. However, some LTIRCs achieved over 80% of the strength of natural aggregate concrete. Moreover, WA addition inhibited internal crack generation in LTIRC and slowed concrete damage from increased WA and EP dosage. The maximum mass loss of LTIPC was 2.72% after 100 freeze–thaw cycles. LTIPC precast panels are suitable for preparing low–carbon insulated building wall panels.

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Section: Frost Resistancementioning

confidence: 99%

Mechanical properties, thermal properties and durability of lightweight thermal insulation recycled concrete

Xu,

Pan,

et al. 2024

Preprint

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“…The silica fume used in this study was produced in Henan, China. According to [35], the optimum addition percentage of silica fume to significantly improve the compressive strength of concrete is 5%. Silica fume with weight percentages of 4%, 6%, and 8% were employed in the concrete mix design.…”

Section: Admixturesmentioning

confidence: 99%

Effects of Municipal Solid Waste on Planting Properties and Scouring Resistance of Vegetation Concrete (Wuhan, China)

Kong

Wang

Guo

et al. 2022

IJERPH

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Vegetation concrete (VC) laid as a reinforcement base and covered by a soil layer with vegetation has been increasingly used to beautify the landscape, reduce environmental pollution and control stormwater runoff. In this study, the effects of municipal solid waste (MSW) on vegetation characteristics of modified VC were tested under different mix compositions. We first explored the effects of the mixed concrete environment on Festuca elata and perennial Ryegrass for 60 days. Then, the influence of various MSW contents added to different percentages of cement on scouring resistance of VC was examined. The experimental results revealed that the germination rates and plant heights of both species decreased with the increase in concrete content. Considering the scouring resistances, the optimal mix proportion of MSW-modified VC was recommended as No. 25, with 5% KW fertilizer, 8% cement and 0.5% wheat straw in this study. Furthermore, adding a small amount of fallen leaves or silica fume to VC can promote the growth of both species to some extent, although these additions had an inverse effect on the scouring resistances. The results contribute to beneficial knowledge for future research on the feasibility of the use these species with VC technology for slope ecological restoration.

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“…The dynamic elastic modulus is a main indicator that reflects the internal structural performance of a material. For freezing resistance, the smaller the relative dynamic elastic modulus is, the more obvious the effect of freeze-thaw damage is (29). Similarly, for CSG, the relative dynamic elastic modulus can also characterize its freeze-thaw damage (30).…”

Section: Relative Dynamic Elastic Modulusmentioning

confidence: 99%

Influence of composite admixtures on the freezing resistance and pore structure characteristics of cemented sand and gravel

et al. 2022

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CSG shows low freezing resistance due to its poor cementing properties, and adding admixtures is the main method to improve its freezing resistance. In this paper, experiments were designed based on the Taguchi method and on the freezing resistance and pore structure characteristics of CSG after adding admixtures. After 20 freeze-thaw cycles, the results showed that both the compressive strength and dynamic elastic modulus of CSG decreased. The area occupancy of more harmful pores (>200 nm) in the NMR test increased, and the fractal dimension of the pore structure in the SEM images also increased. Based on the above indicators, it was concluded that L9 (sodium dodecyl sulfate, graphene oxide, nanosilica powder, and water-reducing agent) has the best freezing resistance. Experiments were conducted on L9 to verify that L9 can significantly improve the freezing resistance of CSG materials under different water-binder ratios, sand ratios, and cement dosages.

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Study on frost resistance and vegetation performance of seashell waste pervious concrete in cold area

Cited by 19 publications

References 17 publications

Mechanical properties, thermal properties and durability of lightweight thermal insulation recycled concrete

Mechanical properties, thermal properties and durability of lightweight thermal insulation recycled concrete

Effects of Municipal Solid Waste on Planting Properties and Scouring Resistance of Vegetation Concrete (Wuhan, China)

Influence of composite admixtures on the freezing resistance and pore structure characteristics of cemented sand and gravel

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