Modification of Lime‐Fly Ash‐Crushed Stone with Phosphogypsum for Road Base

Zhang, Hao; Cheng, Yuan; Lei, Yang; Song, Weikang

doi:10.1155/2020/8820522

Cited by 6 publications

(5 citation statements)

References 17 publications

(24 reference statements)

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“…Al-Zaidyeen and Al-Qadi (2015); James and Pandian (2015); and de Rezende Lilian et al (2017) found that adding PG to lime-fly ash soil can improve the strength of lime-fly ash soil and meet the strength requirements of the lime-fly ash stabilization subgrade of the expressway. Zhang et al (2020) used PG as a modifier to improve the semi-rigid material of subgrade and found that PG could improve the strength and water stability of the original base material, which further confirmed the feasibility of PG as a roadbed filler. However, the reported content of PG is almost less than 22%, which is far from meeting the demand for large-scale utilization of PG.…”

Section: Introductionmentioning

confidence: 70%

Experimental Study on the Road Performance of High Content of Phosphogypsum in the Lime–Fly Ash Mixture

Qian

Zhong

et al. 2022

Front. Mater.

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Phosphogypsum (PG), as a by-product of the production of phosphoric acid, faces the problems of large annual output and difficult treatment. There is a large demand for fillers in the process of road paving, which may be an effective method for the utilization of PG resources. In this study, three proportions of phosphogypsum–lime–fly ash (PLF) mixture were designed, first, according to orthogonal tests. The comprehensive performance of the PLF mixture was tested by the compression rebound modulus test, unconfined compressive strength test, flexural tensile strength test, dry shrinkage test, and temperature shrinkage test, respectively. The results show that adding crushed stone to the PLF mixture can effectively improve the compression rebound modulus, unconfined compressive strength, and flexural tensile strength. The high content of PG in the mixture can also improve the dry shrinkage and temperature shrinkage properties of the mixture. According to the road layer requirements, the optimum proportion of the PLF mixture is recommended, which may benefit the road construction and PG resources.

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Section: Introductionmentioning

confidence: 70%

Experimental Study on the Road Performance of High Content of Phosphogypsum in the Lime–Fly Ash Mixture

Qian

Zhong

et al. 2022

Front. Mater.

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“…China generates almost 20 million tons of PG every year, and its utilization ratio is less than 10% [ 60 ]. When a large amount of PG is thrown away without any treatment, it can contaminate the environment [ 61 ]. The pollution of the Wujiang River in Guizhou is due to the incorrect handling of PG.…”

Section: Resultsmentioning

confidence: 99%

The Outlook of Green Building Development in China during the “Fourteenth Five-Year Plan” Period

Xue

Wang

et al. 2023

IJERPH

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To achieve the “Double Carbon” target, China is paying increasing attention to green building development. Thus, this study selected 26 regional green building development planning documents that have been put into practice since the implementation of the 14th Five-Year Plan and analyzed different development goals and common development barriers and paths presented in regional documents by conducting qualitative research. After the analysis of common goals and goals with regional characteristics, this study verified that spatial imbalances did exist in the development targets of green building in each region during the “14th Five-Year Plan”, and the development priorities also varied from region to region. Due to the relation between development goals and the current situation, this study can also illustrate the spatial imbalances of the development situation between different regions. The results of this study can assist regional governments in gaining a clear self-positioning to judge whether they keep pace with the national development level of green buildings and encourage them to take measures to guarantee the stable development of green buildings.

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“…Therefore, large amounts of sand and gravel were added to meet the gradation requirements. The leaching mass loss of a mixture consisting of 6% PG + 6% lime +12% fly ash +76% crushed stone was 1.8% lower than that of a typical lime-fly ash-crushed stone mixture, in which the compressive strength after wet and dry cycling increased by 57.8%, and the dry shrinkage was significantly lower ( Zhang et al., 2020 ). Moreover, the PG-lime-fly ash-crushed stone mixture had good volume stability and environmental stability.…”

Section: Application Of Pg In Road Engineeringmentioning

confidence: 99%

Recycling phosphogypsum in road construction materials and associated environmental considerations: A review

Men¹,

Li²,

Cheng³

et al. 2022

Heliyon

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Modification of Lime‐Fly Ash‐Crushed Stone with Phosphogypsum for Road Base

Cited by 6 publications

References 17 publications

Experimental Study on the Road Performance of High Content of Phosphogypsum in the Lime–Fly Ash Mixture

Experimental Study on the Road Performance of High Content of Phosphogypsum in the Lime–Fly Ash Mixture

The Outlook of Green Building Development in China during the “Fourteenth Five-Year Plan” Period

Recycling phosphogypsum in road construction materials and associated environmental considerations: A review

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