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Construction Waste Management Pilot City
Post Time: 04/06/2018

  The Ministry of Housing and Urban-Rural Development announced the 35 pilot cities and districts chosen for construction waste management. Jinhua was included in the list, as were two other cities in Zhejiang: Hangzhou and Huzhou. A person in charge of the Municipal Bureau of Housing and Urban-Rural Development indicated that under the correct guidance of the municipal party committee and government and through cooperation with the relevant departments, the experimental work of construction waste management will strive to establish an advanced national model based on the conversion of construction waste into usable resources.

  If piled up to five meters in an open-air space, 10,000 tons of construction waste would occupy an area of over 1600 m2. According to statistics provided by a relevant department, the annual construction waste generated in the Jinhua urban area is about 3 million tons. In conjunction with the rapid development of urban construction, the quantity of construction waste has also rapidly grown, resulting in a “city besieged by construction waste”.

  It is understood that the primary disposal practices of stacking piles of construction waste in open-air or simply filling in areas with landfill were neither environmentally friendly nor economic. Additionally, they use up a great deal of land.

  “Construction waste is actually not real garbage; after proper treatment it can be turned into material of value,” an official of the Municipal Construction Supervision Detachment said. After over 10 years of experimentation and innovation, in the urban area within the 2nd Ring, Jinhua has essentially achieved a supervision and control model based on three major pillars: equitable distribution and control, airtight transport and entrepreneurial operations, and categorized disposal for resource utilization. This model of construction waste management was reported on in August 11, 2017, in the newspaper China Construction News, and dubbed the “Jinhua model.”

  Urban construction waste includes four aspects:

  1. Excavation of residual of engineering projects: cultivatable soil is destined for transport to gardens and parks departments, shale is sent to brick and tile factories, and other unusable residue is transported to temporary stacking sites.

  2. Bricks and concrete deriving from the Three Renovations and One Demolition project, transformed urban villages, and housing renovations are destined for a resource regeneration company based in the Jindong District for utilization and disposal.

  3. The timber in construction waste is primarily transported to wood processing plants for collection and disposal.

  4. Discarded plastic and packaging are collected by a resource regeneration company belonging to the municipal supplying and marketing cooperative.

  The resource regeneration company, which is based in the Jindong District and belongs to Zhongtian Construction Group, began operations in April 2017 and is implementing an exemplary model for the reuse of resources: over an industrial park area of 7.67 hectares, the company annually treats 1 million tons of construction waste, over 85% of which are converted into material with various uses, including permeable bricks, grass-paver blocks, and retaining-wall blocks.

  In over 20 years of green engineering, Wu Runan often saw that residue leftover from trimming bushes and branches was not used for anything and became a burden for greening and maintenance companies. In July 2016, with the support of the Municipal Construction Supervision Detachment, Mr. Wu and his partner rented about 1.87 hectares of land in the village of Houzu, Fucun Town alongside the Jinhua-Yiwu Expressway. There, he began a wood-processing factory. The factory not only collects residual branches but also purchases waste materials from construction sites and unused timber from abandoned sites. “In one day, we may even process up to 300 tons of branches and waste boards,” said Mr. Wu.

  Another example is Yuetang Bricks & Tiles, which is located in the village of Yuetang in Chisong Town, Jindong, and produces 40 million standard hollow bricks made without clay. Jin Jianyue, a representative of the factory, claimed that in order to protect land resources, they ceased using newly excavated clay for the production of bricks beginning in 2010; instead, they use waste materials (primarily shale) from construction sites. These recycled materials meet the production needs and requirements. Similarly, other eight brick factories are settled right outside Jinhua’s 2nd Ring and operate in the same way, in direct cooperation with the Construction Supervision Detachment.

  It was also noted that for the transport of construction waste from construction sites to brick factories, the vehicles used are equipped with airtight covers in order to prevent the spread of dust and other light materials.

  In order to counter the problems of load dripping and dropping and of unauthorized unloading, since June 1, 2013, vehicles engaged in the transport of construction waste in the urban area (including the 2nd Ring) must be equipped with airtight covers and satellite monitoring systems.

  Outside of the 2nd Ring, these measures have not yet been implemented; thus, the presence of overloaded vehicles transporting construction waste without airtight covers is quite common and heavily affects the roads, traffic environment, quality, and safety.

  A study of the Municipal Bureau of Housing and Urban-Rural Development shows that as a result of the continuous advancement of urbanization and the lack of methodical scheduling of some urban construction projects, the construction waste transport network is not sufficient to satisfy the demands of peak periods, which call for the imminent expansion of the construction waste transport industry. In order to solve these problems, a relevant proposal, Implementation Measures for the Management of Construction Waste Transportation Enterprises in Jinhua, was prepared according to the relevant regulations and the local situation. The proposal is planned to be put into effect beginning next month.

  Construction waste disposal should be based on the principles of reduction, reutilization, and doing no harm, as well as the simple idea that the producer of construction waste is also responsible for its disposal. The actual situation, however, is that because of the lack of effective mutual communication and coordination, some waste producers cannot find a destination for the soil excavated from their work sites and end up stacking it randomly, while the greenification and water departments in urgent need of soil cannot find a source able to satisfy their demands. The Municipal Construction Supervision Detachment played a bridging role by contacting the construction authorities of Jindong, Wucheng, and the Development Zone to learn about the local greenification and backfilling projects in advance and by visiting the local work sites where construction waste was likely to be produced and ready to be allocated.

  On January 13, 2018, the city’s first temporary construction waste clearing site was settled and made operational in the Wucheng District, north to the Hangzhou-Jinhua-Quzhou Highway and west to the Jinhua-Lanxi Middle Roadway. With an area of over 6.5 hectares, the site is able to treat 420,000 m3 of construction waste and soil residue.

  The construction waste management is a systematic project which cannot solely rely on construction departments to solve all of its problems. It requires the presence and participation of district governments, the development and reform commission, and bureaus of finance, land, planning, public security, and transportation, to reach its goals of administrative synthesis, law enforcement, and coordinated communication. (By Xu Feng – Jinhua Daily, translated by Marco Lovisetto, edited by Xiamara Hohman)

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