Concrete Circularity: old concrete into new

英国每年生产8600万吨混凝土，每年价值约10亿GB。混凝土有两个主要缺点：很难回收利用，以及大量的碳足迹。目前，大多数旧混凝土被回收为填充材料，需要新混凝土主要由原始材料制成，因此失去了价值经济。新技术允许旧混凝土回收成新混凝土，同时通过永久碳封存大幅减少其碳足迹。这为改善建筑材料的循环性和减少采石、水泥生产和碳排放提供了机会，同时创造了新的收入来源。施乐正在开发一种负担得起、实用且可投资的方法，在英国的工业工厂和再开发地点部署新技术：施乐混凝土循环法(XCCM)。我们的开发分为5个阶段，前三个阶段是本项目的重点：1.浓缩混凝土细粉的实验室测试1。田间示范试验1.XCCM工厂的可行性研究我们正在为前3个阶段的工作争取45,000 GB，这将证明XCCM的技术、市场和经济。这将使施乐能够为第四阶段和第五阶段筹集私人投资：选择和确保选址；以及建造第一个商业工厂。**第一阶段：浓缩混凝土细粉的实验室测试(23年4月至6月)**混凝土主要由骨料、沙子和水泥制成。施乐的过程将每个组件恢复到其原始形式，并尽可能少地受到其他组件的污染。试验表明，砂和骨料可以用于新混凝土。然而，在新混凝土的生产中，还需要更多的工作来确定再生粉末与原始水泥的配合比。实验室测试将确定可回收粉末的胶凝质量、二氧化碳固定率和XCCM再生混凝土与传统产品相比的总体碳足迹减少。**第二阶段：现场试验*为演示方法(6月至8月23日)**现场试验将在可能位于威斯敏斯特市议会授权区域的项目现场部署XCCM，以演示方法并确定实际考虑因素(物流、储存、规划/许可、限制)。**第三阶段：评估我们第一家工厂的可行性研究(9月23日)**可行性研究将列出第一家XCCM工厂的技术经济投资案例，包括工厂设计、资本和运营成本、采购原材料(废弃混凝土)、市场评估、建议的销售渠道、许可和投资计划。

Every year, 86 million tonnes of concrete is produced in the UK with a value of c.£1bn per annum.Concrete has two key drawbacks: it is hard to recycle and has a large carbon footprint. Currently, most old concrete is downcycled into fill materials requiring new concrete to be made mainly from virgin materials and is lost to the value economy.New technologies allow old concrete to be recycled back into new concrete while dramatically reducing its carbon footprint through permanent carbon sequestration. This presents an opportunity to improve circularity of building materials and reduce quarrying, cement production and carbon emissions, while creating new revenue streams.Xeroc is developing an affordable, practical, and investable methodology to deploy new technologies at industrial plants and redevelopment sites in the UK: Xeroc Concrete Circularity Methodology (XCCM).Our development is split into 5 phases, the first three being the focus of this project:1. Laboratory testing of beneficiated concrete fines1. Field demonstration trial1. Feasibility study of XCCM plant \#1We are seeking £45,000 for the first 3 phases of work which will demonstrate the technology, the market and the economics of XCCM. This will enable Xeroc to raise private investment for phases 4 and 5: selecting and securing a site; and building the first commercial plant.**Phase 1: Laboratory testing of beneficiated concrete fines (Apr-Jun '23)**Concrete is made mainly from aggregates, sand and cement. Xeroc's process returns each component to its original form with as little contamination from the other components as possible. Testing shows sand and aggregates can be used in new concrete. However, more work is needed on the cement fraction to determine mix ratios of recycled powder with virgin cement in the production of new concrete. Lab testing will determine cementitious quality of recycled powder, CO2 sequestration rates and overall carbon footprint reduction of XCCM recycled concrete versus conventional product.**Phase 2: Field Trial** **to demonstrate the methodology (Jun-Aug '23)**The field trial will deploy XCCM at a project site likely to be in Westminster City Council authority area to demonstrate methodology and identify practical considerations (logistics, storage, planning/licencing, limitations).**Phase 3: Feasibility study to evaluate our first plant (Sep '23)**The feasibility study will set out a techno-economic investment case for the first XCCM plant, including plant design, capital and operating costs, sourcing raw material (waste concrete), market assessment, proposed sales channels, permitting and investment plan.