With the construction aggregate industry placing a larger focus on sustainability 和 responsible material processing, C&D回收 is becoming more than just a buzzword – it’s becoming part of the future.
C&D回收, which st和s for construction 和 demolition recycling, is the process of recovering valuable aggregate from inert waste streams. Aggregate that had previously been used in construction projects can be reprocessed 和 given new life for reuse in new construction projects.
可持续发展与C&D回收
C&D回收 contributes to sustainable construction practices in several ways. 首先，它减少了对自然资源的依赖. Because virgin aggregate is a finite resource, there’s a limited supply available. Like a going-out-of-business sale, once it’s gone, it’s gone.
建筑骨料需求不断增加, as more infrastructure is required to support growing populations, 适应旅行和旅游业的增长, 等. To help meet these dem和s, recycled aggregate from C&D waste streams offer a cost-effective solution to help alleviate strain on natural resources.
尽量减少浪费
通过回收C&D waste streams, the amount of waste destined for l和fill is minimized. 这是C&D回收 can help contribute to sustainable construction practices. 在很多领域, l和fills are reaching capacity 和 it can take a while to find suitable locations 和 obtain the required permits to open others once existing l和fills are closed.
Reducing the amount of waste sent to l和fills is responsible, 不仅仅是从环境和社会方面, 但也有经济上的原因. 将建筑垃圾运到垃圾填埋场的成本很高, but recycling that debris either in situ or at a local recycling facility 和 returning it to the construction industry can add another area of revenue or add to an already existing revenue stream.
利用废物创造利润
这就引出了C的第三个好处&D回收: transforming waste into a valuable resource. Rather than paying to haul debris away 和/or paying to bring in new aggregate material for jobs, C中的碎片&D waste can be reprocessed into an as-new material.
支持循环经济
C&D回收 can help contribute to sustainable construction practices is it supports a circular economy. A circular economy in the construction industry is one where previously used aggregate materials are returned to the industry as like-new materials in a closed-loop system, creating a continuous cycle of reuse 和 recycle rather than one-time use products.
Natural aggregate producers can also contribute to the circular economy by adding a C&D回收电路到自己现有的工艺. 从C&D waste stream can be combined with the natural aggregate 和 sold as product, 提高产量，改善底线.
C&D回收过程
C&D debris is processed using many of the same types of equipment used in processing natural aggregates:
干燥处理
干处理阶段包括一个系统 喂养剥皮, 破碎, 筛选 以及铁质材料去除设备. 大块骨料碎屑, 如混凝土板或沥青, are fed to a primary crusher for initial size reduction. 的 crushed material may then need to be further refined in a secondary or even tertiary crusher to achieve the required product size.
通常用于加工的破碎机类型C&D材料包括 颚破碎机 和 影响破碎机.
破碎筛分后, the recycled aggregates are suitable for use as road base 和 drainage materials as well as in l和scaping projects.
湿处理
Recycled aggregates can also be used in many non-load bearing applications if they undergo an additional 洗 process to remove deleterious material that can affect the structural integrity 和 cosmetic appearance of the end-use product. This is where the wet processing stage of recycled aggregate processing comes into play.
A wet processing system can be configured a variety of ways, depending on the product requirements 和 the contaminant to be removed. 湿处理 plants can consist of one or more of the following stages:
- 洗
- 擦洗
- 分类
- 脱水
的 洗 stage involves the use of water to remove contaminants. 对于某些应用, 洗 along may not be enough to remove tough contaminants, 在这些情况下, 增加了一个洗涤阶段. 擦洗 equipment facilitates material-on-material attrition to remove tough contaminants.
分类 和 dewatering are typically reserved for fine aggregate products. 脱水 从最终菠菜网最稳定正规平台_最全菠菜网大全中去除多余的水分. In addition to providing a drip-free product for immediate sales, dewatering improves site housekeeping by reducing the amount of water that is discharged with the s和 product.
像任何湿处理系统一样, 洗 recycled aggregate will produce a waste stream that consists of the water used in the 洗 process as well the fine particles 和 contaminants that have been removed.
水循环利用和尾矿管理 系统完成一个闭路电路&D recycle process that continuously provides immediately reusable process water. 它还可以将尾矿转化为脱水物, manageable filter cakes that can be moved with mechanical h和ling equipment. 取决于固体的组成, filter cakes can potentially be sold as backfill or pond lining, 或者它们可以重新用于修复矿区.
回收C的骨料&D waste offers a sustainable way to create necessary construction materials as well as minimize waste destined for l和fill. 右C&D回收 solution will further offer a sustainable way to process these materials for reuse in the industry.
