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Details of the Structural Layer of Green Recycling and Planting

Details of the Structural Layer of Green Recycling and Planting

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By examining the recycling of construction waste in the city construction including both architecture and landscape, this paper aims at exploring a recyclable manner of making use of the construction waste in the landscape design. This paper sorts out types of usable construction wastes and outlines approach, including green recycling and planting....

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... the structural later of the recycling system, the raw material of soil layer and the drainage later, containing the coarse sand layer and the grit layer, are all comes from the construction waste and recycled material, details can be found in Table 1. Layer to stabilize the construction waste ...

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... Strongly agree Agree Disagree Strongly disagree As shown in Figure 3, landfill is the most common method, and the adoption of recycling in the disposal of building materials is relatively low. This also confirms the research result from Luo et al. that in China, the most common method of dealing with waste is to bury it [21]. Then what causes the low recycling rate (5%) of construction materials in China? ...
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The recovery rate of construction materials is only 5% in China, which will lead to environmental and economic problems. Researchers from other countries have recognized the potential of building information modelling (BIM) in optimizing construction material recycling. However, previous research did not take the whole life cycle into consideration and was not practical enough. In this research, a questionnaire was conducted to find out how construction waste is disposed of in construction projects. Then, the existing research results were analyzed to find out how to apply BIM in the whole-life-cycle disposal of construction materials. According to the results of the questionnaire, landfill is the most common way to dispose of construction materials in China; besides this, almost no construction projects use BIM in material recycling. Hence, a BIM-based dynamic recycling model is proposed. Information management of materials, demolition planning, and BIM were all combined in this model for the purpose of optimizing the application of BIM, thus developing a waste material disposal system to achieve higher recovery rates and sustainability. More positive measures should be taken to deal with the problem of construction waste; if not, more environmental and economic problems will follow.
... Int., 9(3): 472-501, 2020EISSN: 2706-7920 ISSN: 2077-4435 DOI: 10.36632/csi/2020 487 Fig. 24: Manufacturing process of ceramic waste (Rubio de Hita et al., 2016) 7. Use of Debris building and demolition in the landscape One of the most efficient ways is to use the building waste and try recycling possibilities for the city's environment, such as terrain shaping, paving paths, plant covering. Building waste and recycled material can be shown to be a planting component (Luo et al., 2018) 7.1. The green recycling and planting systemic framework As shown in Fig. (25), a recycling system built from construction waste (14) is a layer of vegetables, (13) a layer of soil, and (12) a layer of drainage. ...
... The construction waste recycling system shown in Fig. (25) shows a good layer structure and offers a soil condition for planting. (Luo et al., 2018) 7.2. Details of the green recycling and planting process ...
... Sci. Int., 9(3): 472-501, 2020EISSN: 2706-7920 ISSN: 2077 DOI: 10.36632/csi/2020.9.3.42 (Luo et al., 2018) Working with the current site -At the beginning of the project, conduct a soil audit and pre-demolition audit to identify types and quantities of potential materials for in-situ retention, reuse and recycling. ...
Chapter
The third chapter of the monograph begins with a literature review about the influence of foreign ions on the formation of synthetic gyrolite. As the next step, a detailed description of solid waste—silica gel contaminated with aluminum and fluorine ions—is presented. This waste is usually landfilled, which may lead to serious environmental issues. The application of silica gel waste is limited because it contains ~10 wt% of F– ions; however, the high concentration of SiO2 (78.9 wt%) makes this waste a potential source of silica for the synthesis of silicates. Finally, the synthesis of gyrolite was performed by changing the molar ratio of the initial mixture and raw materials. The results of the experimental part and the thermodynamic calculations of hypothetical crystallization reactions of calcium silicate hydrates in the investigated system showed that the formation of gyrolite family compounds under hydrothermal synthesis conditions proceeds according to the following sequence: 0.66CaO + SiO2 + H2O → C–S–H(I) → Z-phase → gyrolite gel → gyrolite → truscottite. Also, it was determined that silica gel waste is a prospective SiO2 source for the synthesis of low-base calcium silicate hydrates because the formation of gyrolite is two times shorter in comparison with pure mixtures. Meanwhile, calcium nitrate is not recommended as a source of calcium because, during synthesis, nitrate anions intercalate into the structure of gyrolite. As a result, the porosity of gyrolite decreases, which can negatively affect the properties of synthetic gyrolite.