| 摘要: |
| 研究了乙二醇、三乙醇胺及聚羧酸减水剂等助磨剂对蔗渣灰（SCBA）颗粒特性的影响，揭示了蔗渣灰颗粒特性对砂浆微观结构的作用机理，分析了蔗渣灰颗粒特性与砂浆强度的相关性，同时基于水胶比、蔗渣灰掺量及颗粒特性与砂浆抗压强度的相关关系，建立了基于颗粒特性调控的蔗渣灰砂浆抗压强度多因素模型.结果表明：掺入0.08%三乙醇胺能最大程度地优化蔗渣灰颗粒特性；当蔗渣灰粒径D≤3 μm的颗粒含量过多时，其比表面积过大，蔗渣灰对砂浆强度造成了负面影响，可增多3 μm<D≤32 μm的颗粒含量以及降低D≤3 μm和D>32 μm的颗粒含量来提升蔗渣灰砂浆的强度. |
| 关键词: 蔗渣灰 颗粒特性 强度 微观机理 多因素模型 |
| DOI：10.3969/j.issn.1007-9629.2024.05.005 |
| 分类号:TU528.01 |
| 基金项目:广西省杰出青年科学基金项目（2022GXNSFFA035035）；广西省科技重大专项项目（AA23023034）；广西省研究生教育创新计划资助项目（YCBZ2023018） |
|
| Multi-factor Model for Compressive Strength of Sugarcane Bagasse Ash Mortar Based on Particle Characteristics Regulation |
|
WEI Jingli1,2, LI Shuyang1,3, CHEN Zheng1,2, SU Junchi1,2, ZHAO Jie1,2
|
|
1.State Key Laboratory of Featured Metal Materials and Life-Cycle Safety for Composite Structures， Guangxi University， Nanning 530004， China;2.Key Laboratory of Disaster Prevention and Structural Safety of China Ministry of Education， Guangxi University， Nanning 530004， China;3.Guangxi Key Lab of Road Structure and Materials， Guangxi Transportation Science and Technology Group Co.， Ltd.， Nanning 530007， China
|
| Abstract: |
| The effects of ethylene glycol， triethanolamine and polycarboxylic acid as grinding aid on the particle characteristics of sugarcane bagasse ash（SCBA） were investigated， the mechanism of the particle characteristics of SCBA on the microstructure of mortar was clarified， and the correlation between SCBA particle characteristic and mortar strength were analyzed. Based on the relationships between water-cement ratio， SCBA content， particle characteristic， and compressive strength of mortar， a multi-factor model for compressive strength of SCBA mortar regulated by particle characteristics was established. The results show that incorporating 0.08% triethanolamine optimizes the particle characteristics of SCBA to the maximum extent. Excessive content and large specific surface area of particles with a diameter D≤3 μm negatively impact SCBA mortar strength. To enhance SCBA mortar strength， increasing the content of particles with 3 μm<D≤32 μm and decreasing the content of particles with D≤3 μm and D>32 μm are recommended. |
| Key words: sugarcane bagasse ash particle characteristic mortar microscopic mechanism multi-factor model |
