搅拌站混凝土废水对碱-激发矿渣材料性能的影响  

Effect of concrete wastewater of plant on performance of alkali-activated activated materials

作　　者：丁丹 张治国[2,3] 单士锋 余敏 郑永红[2] 胡友彪[3] 陈佩圆 朱海东 DING Dan;ZHANG Zhiguo;SHAN Shifeng;YU Min;ZHENG Yonghong;HU Youbiao;CHEN Peiyuan;ZHU Haidong(Anhui Province Research Center for Disposal and Reutilization Engineering of General Industrial Solid Waste,No.321 Unit,Bureau of Geology and Mineral Exploration of Anhui Province,Tongling 244000,China;School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China;Academician Workstation,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽省地质矿产勘查局321地质队安徽省一般工业固废处置与资源化利用工程研究中心,安徽铜陵244000 [2]安徽理工大学地球与环境学院,安徽淮南232001 [3]安徽理工大学安徽省院士工作站,安徽淮南232001

出　　处：《混凝土》2025年第3期163-167,共5页Concrete

基　　金：国家重点研发计划“固废资源化”重点专项(2020YFC1908601);安徽省院士工作站开放基金(2022-AWAP-01)。

摘　　要：为高效处置和资源化利用搅拌站混凝土废水(CWw),采用CWw作为碱-激发矿渣胶凝材料(AASM)的拌和水来源,研究不同CWw掺量对AASM性能的影响.研究结果表明:CWw的残留减水剂、高pH及丰富的离子环境对AASM水化过程同时产生了水化抑制和水化促进作用,而水化促进作用更为明显,最优组的72 h累计放热量提高12.8%.基于此,CWw促进了AASM的化学收缩发展,不仅提高了AASM的长龄期抗压强度,增幅达到0.2%~10.9%,还显著减小了其自收缩,最大降低幅度为48.2%.使用CWw作为AASM的拌和水来源是可行的,具有显著的经济和环境效益。To effectively dispose and utilize wastewater(CWw)from concrete plant,it explores the use of CWw as a mixing water for alkali-activated slag materials(AASM).The effects of varying CWw dosages on the performance of AASM were investigated.The results indicate that the residual superplasticizer,high pH,and rich-ionic conditions of CWw exert both hydration inhibition and promotion effects on the AASM hydration process,with the promotion effects being more pronounced.The optimal group showed a 12.8%increase in cumulative heat release over 72 hours.Consequently,the addition of CWw increased the chemical shrinkage of AASM,improved the long-term compressive strength of AASM from 0.2%to 10.9%,and obviously mitigated the autogenous shrinkage.The feasibility of CWw as a mixing waterfor AASM was verified with great environmental and economic benefits.

关 键 词：碱-激发矿渣胶凝材料 搅拌站混凝土废水 水化特性 自收缩 环境和经济效益 

分 类 号：TU528.041[建筑科学—建筑技术科学]