Concrete Circularity: old concrete into new

英国每年生产8600万吨混凝土，价值约为10亿英镑。混凝土有两个主要缺点：难以回收，碳足迹大。目前，大多数旧混凝土被降级为填充材料，要求新混凝土主要由原始材料制成，并且失去了价值经济。新技术允许旧混凝土被回收到新混凝土中，同时通过永久的碳封存大大减少了其碳足迹。这为改善建筑材料的循环性、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。Xeroc正在开发一种经济、实用、可投资的方法，用于在英国的工业工厂和重建场地部署新技术：Xeroc混凝土循环方法（XCCM）。我们的开发分为5个阶段，前三个阶段是这个项目的重点：选矿混凝土细粒的室内试验现场示范试验XCCM工厂的可行性研究\#1我们正在为前三个阶段的工作寻求45,000英镑，这将展示XCCM的技术，市场和经济。这将使Xeroc能够为第四和第五阶段筹集私人投资：选择和确保场地；建造第一座商业工厂。**第一阶段：选矿混凝土细粒实验室试验（2013年4月- 6月）**混凝土主要由骨料、砂和水泥组成。赛罗克的工艺使每个成分恢复到原来的形态，尽可能少地受到其他成分的污染。试验表明，砂和骨料可用于新型混凝土。然而，在新混凝土生产中，需要对水泥分数进行更多的研究，以确定再生粉与原水泥的混合比例。实验室测试将确定再生粉的胶凝质量、二氧化碳固存率和XCCM再生混凝土与传统产品相比的总体碳足迹减少量。**第二阶段：现场试验** **以演示方法（23年6月至8月）**现场试验将在可能位于威斯敏斯特市议会管辖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、存储、规划/许可、限制）。**第三阶段：可行性研究评估我们的第一个工厂（23年9月）**可行性研究将为第一个XCCM工厂制定技术经济投资案例，包括工厂设计，资本和运营成本，原材料采购（废混凝土），市场评估，拟议的销售渠道，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.