Spread from small actions
With a terrace space of less than 30 square meters, Ms. Nguyen Thi Thuoc (living in Phuc Dien ward, Bac Tu Liem district) has grown many types of green vegetables by herself to provide clean food for her family. The special thing here is that the pots of green vegetables all use used styrofoam boxes, which helps save costs, while optimizing the value of the item and preventing it from being thrown away in vain.
Not only that, Ms. Thuoc shared, many old objects in the house are also reused into new decorative items to help prolong the life of the materials, thereby minimizing the amount of waste released into the environment. From old wine bottles to flower vases to decorate the living space or empty water bottles, shampoo, shower gel and turned into decorative potted plants in the house.
"Since the "mini vegetable garden" on the rooftop has become a source of joy for the whole family when working together, it has also motivated me to reuse many other products to make use of everything possible to create useful objects, while also teaching my children to always cherish all items and not to waste anything that can still be used," said Ms. Thuoc.
Meanwhile, the Phuc Tan public art project uses recycled materials, bringing new life to this space. The temporary landfills and unhygienic habits of people in Phuc Tan ward and neighboring areas have gradually disappeared. New habits and new activities of local people from children to adults have gradually made the riverside area become more vibrant and full of life, blending with the fresh nature and the light of the artworks.
People have gradually become accustomed to the appearance of the works as part of their lives, bringing benefits to the landscape environment as well as livelihood potential as the area gradually attracts more visitors, and has also created many ideas for people living here to recycle used objects.
Mr. Dam Duc Thuy (Phuc Tan, Hoan Kiem district) shared that the public project brings new vitality to the neighborhood with cleanliness and spaciousness. From the habit of throwing away plastic bottles or throwing garbage bags around the fence in front of the house, now he and his children learn how to recycle household items. Pen holders from recycled plastic bottles, flower pots from plastic bottles... beautify the living space. Instead of letting plastic waste harm the environment, recycling them into decorations not only helps reduce the amount of waste but also creates useful and beautiful items.
According to experts, the advantages of reusing materials in construction are saving costs for waste material treatment, reducing harmful impacts on the natural environment, reducing construction waste, and making full use of resources... In particular, exploiting and using recycled materials in construction will promote creative design ideas and new styles in architecture and interior design.
The use of recycled materials brings great value to the design of living spaces as well as contributes to environmental protection. The sustainability of housing projects will be assessed through the positive effects of the interior space on users, similar to the project on the surrounding environment.
Necessary work
With the strong development of urban areas, many constructions and infrastructures have been deployed. Old degraded urban areas have been replaced by new, large-scale and modern constructions. The transportation system has also been gradually renovated, upgraded and expanded... However, along with the development, a huge amount of construction waste has been created, affecting the environment and wasting landfill space.
This has caused cities to face a serious shortage of places to collect and transfer waste soil and construction waste (CW); and increasingly scarce natural material sources. Utilizing scrap and waste as alternative raw materials in the production of construction materials is one of the solutions to reduce environmental pollution and ensure sustainable development in construction.
A representative of the Department of Environmental Pollution Control (Ministry of Natural Resources and Environment) said that from 2019 to now, the amount of domestic solid waste generated continues to increase nationwide. Meanwhile, the collection and classification at source still face many challenges and have not been implemented in a synchronous manner.
There are currently only 1,548 facilities nationwide for treating domestic solid waste. Of these, 1,178 are landfill facilities (accounting for 76.10%), many of which are unsanitary; 340 are facilities for burning domestic solid waste, accounting for 21.96%. The remaining 30 are facilities for treating domestic solid waste into humus/organic fertilizer, accounting for a very low rate of 1.94%.
Suggesting a direction for recycling waste, according to Dr. Tong Ton Kien - Faculty of Construction Materials, University of Construction, PTXD is very rich and diverse in types. The quality of this material is also very different when collected from sources and constructions. Utilizing waste as materials not only saves increasingly depleted resources, but also reduces transportation costs, at the same time, increases the efficiency of using natural materials.
Using recycled materials can produce products with lower costs than new materials made from natural materials, increasing project efficiency. However, to realize this, the Government as well as ministries and branches need to set technical requirements to be able to reuse them as suitable construction materials.
"The main components of PTXD include fragments of cement concrete; burnt clay bricks, ceramic tiles; cement-sand mortar, lime-cement mortar; construction glass; construction plaster... All of them can be recycled into popular materials that suit different requirements and bring different economic efficiency. All types of PTXD can be used as ground leveling materials for construction works, as recycled aggregates for concrete and construction mortar" - Dr. Tong Ton Kien said.
Dr. Tang Van Lam - Department of Construction Engineering, University of Mining and Geology said that manufacturing "green" concrete using non-cement binders from a mixture of thermal power fly ash, blast furnace slag and ceramic waste is necessary to reduce the pressure of handling waste from thermal power and metallurgical plants; minimize the impact of dust and smoke during the cement production process, contributing to solving the problem of scarcity of construction materials for projects in Vietnam.
This material aims to minimize the negative impact on the environment and increase the sustainability of the construction object by using all industrial solid waste to replace traditional Portland cement. The consumption of a large amount of solid waste contributes to creating a greener environment, reducing the amount of toxic substances released into the environment, while saving natural resources, especially limestone and clay.
Data from the Department of Environmental Pollution Control shows that the amount of domestic solid waste generated in 2019 was 64,658 tons/day (of which the amount of domestic solid waste in urban areas was 35,624 tons/day, and in rural areas was 28,394 tons/day). Up to now, the amount of domestic solid waste generated has increased to more than 67,877 tons/day (of which the amount of waste in urban areas was more than 38,143 tons/day, and in rural areas was more than 29,734.30 tons/day).
Source: https://kinhtedothi.vn/xu-huong-xanh-hoa-su-dung-vat-lieu-xay-dung.html
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