Investigation into the Application of Construction and Demolition Waste in Urban Roads

Li, Youyun; Zhou, Haihua; Su, Linjian; Hou, Hang; Dang, Li

doi:10.1155/2017/9510212

Cited by 18 publications

(10 citation statements)

References 50 publications

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“…Almost all the construction technologies were outdated, non-efficient, and in many cases unsafe for use [1][2][3]. Becoming open to new technologies and structural materials provided a strong impact for modernization of the entire construction industry, and until nowadays this trend is still being observed [4][5][6][7][8]. Lack of planning and poor economy management resulted in a huge production of waste, both municipal and industrial, which in many cases were deposited without any control [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Becoming open to new technologies and structural materials provided a strong impact for modernization of the entire construction industry, and until nowadays this trend is still being observed [4][5][6][7][8]. Lack of planning and poor economy management resulted in a huge production of waste, both municipal and industrial, which in many cases were deposited without any control [3][4][5]. The waste deposition became a serious issue, mainly in well-developed regions like Warsaw or Silesia, where the amount of by-products was rapidly increasing.…”

Section: Introductionmentioning

confidence: 99%

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Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

et al. 2019

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The paper aims at the research of pioneering applications of geosynthetic materials used for improvement of anthropogenic material for road contraction challenges in Poland. The presented case study concerns a road embankment construction process within an area of underground mining coal extraction for which significant deformations have been frequently recorded. To improve the bearing capacity of the structure base, the geosynthetic materials were used. The question; however, was how the anthropogenic materials, filling the embankment, will interact with each other over time. The assessment of the structural condition of the motorway surface was performed using the falling weight deflectometer and the calculated modules based on the back-analysis method. They confirmed the effectiveness of the geosynthetics used in the study. They also revealed that the mining exploitation, with simultaneous use of aggregate stabilization with geogrids, did not cause significant changes in the stiffness of the pavement layers. All observations, based on both field and laboratory tests, did not show any negative impact of anthropogenic soils on the structural behavior of geogrids.The present paper describes a case study on road construction works on post-mining areas. It concerns an underground mining coal extraction site where a new motorway was planned to be constructed. However, due to significant deformation of the ground surface, caused by former mining excavations, the sophisticated ground improvement methods were necessary to be applied. For the linear structures, like roads, or other geotechnical investments the mining activity is a major safety threat, thus the need of maintenance efforts increase significantly [14][15][16][17].Recently, a peculiar revolution in the field of understanding and describing the geogrid interaction with the unbound aggregate has been observed. It mainly concerns the road construction and ground mechanical condition improvement. An improved performance of the pavement due to the geosynthetic reinforcement and bearing capacity improvement [18][19][20][21][22][23] depends on main mechanisms [24][25][26]:

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

et al. 2019

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“…For AK0+980, t 0 , t 1 , and t 2 were set at 90, 170, and 250 days, respectively, with the respective S 0 , S 1 , and S 2 being 18.1, 22.4, and 23.2 mm. Using Equations (8) and (9) and with α' = 5.83675 and β' = 0.159599, α' and β' were substituted into Equation (10) and the three-point hyperbolic model for AK0+980 determined as:…”

Section: Settlement Prediction Resultsmentioning

confidence: 99%

“…For example, it was found that CDW could be used as the raw material for the production of recycled aggregate concrete (RAC) for road embankments, subgrades, and foundations [4][5][6][7][8]. Li et al [9] found that after a relatively simple treatment, CDW had high strength and was suitable for urban road embankments; it had an unconfined compressive strength under optimal moisture content from 0.85 to 0.62 MPa, with a mean value of 0.74 MPa, an average CBR value of at least 34.7%, an average embankment deflection of 0.66 mm, and a resilient modulus of 162.7 MPa-all of which met the relevant specifications.…”

Section: Introductionmentioning

confidence: 99%

A Three-Point Hyperbolic Combination Model for the Settlement Prediction of Subgrade Filled with Construction and Demolition Waste

Wang

Shen

et al. 2020

Materials

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Using construction and demolition waste (CDW) as road subgrade filling materials is an excellent way to solve the disparity between increased demand and road construction aggregate shortages. However, a key quality control problem is predicting the subgrade settlement, primarily because the CDW subgrade settlement prediction methods are not yet mature. To go some way in overcoming this problem, in this paper we developed a three-point hyperbolic combination model to predict CDW subgrade settlement, in which three appropriate points for the measured settlement curve were selected in the prediction samples to improve the hyperbolic model. Then, common prediction models—namely, the hyperbolic model, the three-point model, and the Hushino model—were compared with the proposed combination model to assess its viability. Finally, the three-point hyperbolic combination prediction accuracy was analyzed for different start points t0 and time intervals Δt. The analyses found that the proposed model was in good agreement with the measured data, had a high correlation coefficient, and had only small errors. However, the time interval Δ t needed to be greater than 80 days and the start point t0 needed to be selected at the beginning of the stable post-filling period, that is, t0 = 90–100 days. The application parameters were also determined to provide a reference for the large-scale application and settlement predictions of CDW subgrade.

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“…protective barriers). Practical applications and case studies of the successful use of recycled materials for road construction applications have been reported by a number of authors .…”

Section: Introductionmentioning

confidence: 99%

Compaction control of secondary materials used in earthworks

2019

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Compaction control is a fundamental part of quality assurance for earthworks and essential to ensuring the long‐term stability and serviceability of earth structures. As the testing of relative compaction for coarse‐grained materials is time‐consuming, plate load tests are typically used for this purpose. Practical experience shows that the compaction control of secondary materials using plate load tests is not as straightforward as suggested in earthwork specifications. Unfortunately, these subtleties are not widely known and typically lead to rejection of the compacted layers, despite the material having been compacted thoroughly. This paper summarizes the findings of compaction field tests on several secondary materials that were field‐compacted to varying dry densities. Field testing of the compacted layers included the determination of dry density and plate load tests (static and dynamic). The results of these field tests are presented and discussed here and show that the parameters provided by plate load tests do not relate to the dry densities of the materials tested in the same way as they do for natural materials. Suggestions are provided concerning the most viable way of conducting compaction control of secondary materials within the earthwork specifications of Germany and Austria.

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Investigation into the Application of Construction and Demolition Waste in Urban Roads

Cited by 18 publications

References 50 publications

Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

Lessons Learned on Geosynthetics Applications in Road Structures in Silesia Mining Region in Poland

A Three-Point Hyperbolic Combination Model for the Settlement Prediction of Subgrade Filled with Construction and Demolition Waste

Compaction control of secondary materials used in earthworks

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