摘要
集料是水泥稳定碎石的主要组成材料之一,集料化学组成特性对水泥稳定碎石初期水化存在潜在影响。该研究初选石灰岩、白云岩、玄武岩、片麻岩和闪长岩5种不同来源集料,并基于CemGEMS在统一环境和水泥条件下进行水化模拟分析。在此基础上,以石灰岩集料为例对比分析水泥水化过程中各类水化产物的生成演变规律,进而比较不同集料条件下钙矾石、水化硅酸盐等关键产物的生成速率,并统计分析集料化学成分与水化产物生成之间的内在关系。结果表明,相比玄武岩、闪长岩等酸性集料,石灰岩、白云岩等高碳酸盐类集料条件下钙矾石生成速率相对缓慢,且水化硅酸盐生成量相对较少;集料SiO_(2)含量与水化硅酸盐生成量呈线性关系,SiO_(2)含量越高则水泥水化生成的水化硅酸盐越多。
Aggregate is one of the main components of cement stabilized gravel,and the chemical composition characteristics of aggregate have a potential impact on the initial hydration of cement stabilized gravel.In this study,five different sources of aggregate,including limestone,dolomite,basalt,gneiss,and diorite,were selected,and hydration simulation analysis was carried out based on CemGEMS under a unified environment and cement conditions.On this basis,taking limestone aggregate as an example,the formation and evolution laws of various hydration products during cement hydration were compared and analyzed,and then the formation rates of key products such as ettringite and hydrated silicate under different aggregate conditions were compared.,and the intrinsic relationship between the chemical composition of aggregate and the formation of hydration products was statistically analyzed.The results show that compared with acidic aggregates such as basalt and diorite,ettringite formation rate is relatively slow under high carbonate aggregate conditions such as limestone and dolomite,and the amount of hydrated silicate formation is relatively small;the SiO_(2) content of aggregate is linearly related to the amount of hydrated silicate formation.The higher the SiO_(2) content,the more hydrated silicate formed by cement hydration.
出处
《科技创新与应用》
2024年第31期92-95,共4页
Technology Innovation and Application
基金
云南省交通运输厅科技创新示范项目(2022-73)。
关键词
多源集料
组成成分
水泥水化
数值计算
过程分析
multi-source aggregate
composition
cement hydration
numerical calculation
process analysis
