多指标正交试验优化石粉RPC制备工艺研究
Research on RPC Preparation Technology of Stone Powder by Multi-index Orthogonal Test
黄前龙 1蔡燕霞 1张君瑞 2洪伟华 2李立辉3
作者信息
- 1. 中路高科(北京)公路技术有限公司,公路建设与养护新材料技术应用交通运输行业研发中心 北京市 100088
- 2. 浙江交投矿业有限公司 舟山市 316000
- 3. 交通运输部公路科学研究院 北京市 100088
- 折叠
摘要
为促进凝灰岩石粉高值化利用、优化其制备活性粉末混凝土(RPC)配合比和养护工艺,以水胶比为0.18的RPC配合比为基体,基于多指标正交试验设计理论,以28 d立方体抗压强度和抗折强度为评判指标,利用综合平衡法对多指标正交试验极差分析结果进行了评价,得出了制备工艺优化方案,并揭示了养护温度(A)、养护时间(B)、水胶比(C)等因素不同水平对掺石粉RPC力学性能的影响程度和变化规律.研究表明:凝灰岩石粉作为部分细集料制备RPC具有致密增强的作用,同时实现石粉高值化利用,降低RPC制备成本,改善生态环境.水胶比对立方体抗压强度影响最为显著,养护时间对抗折强度影响最为显著,凝灰岩石粉RPC制备工艺优化方案为养护温度85℃,养护时间24 h,水胶比0.18.
Abstract
In order to promote the high value utilization of tuff stone powder and optimize the mix ratio and curing process of RPC prepared from tuff stone powder,with RPC mix ratio of water binder ratio 0.18 as matrix,based on the design theory of multi-index orthogonal experiment,with the 28d cube compressive strength and flexographic strength as evaluation indexes,the range analysis results of multi-index orthogonal test are evaluated by comprehensive balance method,and the optimization plan of preparation process is obtained,and the influence degree and variation rule of curing temperature(A),curing time(B),water-binder ratio(C)and other factors on the mechanical properties of RPC doped with stone powder are revealed.The results show that the preparation of RPC with tuff stone powder as part of fine aggregate has the effect of densification enhancement,high value utilization of tuff stone powder is realized,the preparation cost of RPC is reduced,and the ecological environment is improved.The water-binder ratio has the most significant effect on the compressive strength of the cube,and the curing time has the most significant impact on the bending strength.The optimization scheme of RPC preparation process of tuff stone powder is curing temperature 85℃,curing time 24h,and water-binder ratio 0.18.
关键词
活性粉末混凝土/凝灰岩石粉/制备工艺/正交试验/极差分析Key words
reactive powder concrete/tuff stone powder/preparation technology/orthogonal test/range analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据