文红宇,彭扬帆,梁东景,贺盛.白泥混凝土的制备及性能研究[J].中国造纸,2025,(8):140-148 本文二维码信息
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白泥混凝土的制备及性能研究
Study on Preparation and Properties of Lime Mud Mixed Concrete
收稿日期：2025-01-20  修订日期：2025-02-17
DOI：10.11980/j.issn.0254-508X.2025.08.018
关键词:  白泥  抗压强度  抗氯离子渗透  抗碳化性能  固体废弃物
Key Words:lime mud  compressive strength  chloride penetration resistance  carbonization resistance  solid waste
基金项目:广西重点研发计划项目（AB24010079）；中央引导地方专项（ZY21195043）；中建八局科技研发项目。
作者单位邮编
文红宇* 广西大学后勤基建处,广西南宁,530004 530004
彭扬帆 广西大学土木建筑工程学院,广西防灾减灾与工程安全重点实验室,工程防灾与结构安全教育部重点实验室,广西南宁,530004 530004
梁东景 中国建筑第八工程局有限公司,上海,200122 200122
贺盛* 广西大学土木建筑工程学院,广西防灾减灾与工程安全重点实验室,工程防灾与结构安全教育部重点实验室,广西南宁,530004
广西博世科 环保科技股份有限公司,广西南宁,530007 		530007
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摘要:采用白泥和粉煤灰替代普通硅酸盐水泥制备混凝土。根据白泥的化学成分与理化特性，使用行星式球磨机改变白泥粒径与比表面积，建立了不同龄期和白泥掺量下的混凝土立方体抗压强度预测模型，研究了单掺白泥混凝土和白泥-粉煤灰二元复掺混凝土的力学性能及耐久性能变化规律，分析了白泥掺量对混凝土抗压强度、抗氯离子渗透性能和抗碳化性能的影响，通过分析微观形貌下的水化产物探究了白泥与粉煤灰的协同作用。结果表明，掺量<10%的单掺白泥混凝土较普通硅酸盐水泥具有更高的早期强度，掺量为20%时，白泥掺入混凝土起到微晶核效应。白泥掺量增大时，易使混凝土水化产物的微观结构变得松散。白泥与粉煤灰协同作用下，白泥-粉煤灰二元复掺混凝土（L5F15）84天龄期时，抗压强度可达50.47 MPa，比单掺白泥混凝土（L20）的抗压强度提高12.7%，胶凝体系微观孔隙明显减少。掺入白泥后，混凝土氯离子扩散系数增大，粉煤灰的掺入可以改善白泥混凝土的抗氯离子渗透与抗碳化性能，建立的白泥混凝土碳化深度实用预测模型，相关性较为显著。
Abstract:Lime mud and fly ash were used to replace ordinary portland cement to prepare concrete. According to the chemical composition and physicochemical characteristics of lime mud， planetary ball mill was used to change the particle size and surface area of lime mud， and the prediction model of concrete cube compressive strength under different ages and lime mud content was established. The variation rule of mechanical properties and durability of lime mud concrete under single addition and binary addition with fly ash was studied， and the influence of the amount of lime mud on the compressive strength， chloride ion penetration resistance and carbonization resistance of concrete， and explored the synergistic effect of lime mud and fly ash were analyzed by analyzing the hydration products under the microscopic morphology. The results showed that the early strength of the lime mud concrete mixed with less than 10% was higher than that of ordinary portland cement. When the addition amount was 20%， the lime mud concrete mixed with the concrete had a micro crystallinity effect. As the content of lime mud increased， the microstructure of hydration products of concrete became loose easily. Under the synergistic action of lime mud and fly ash， the compressive strength of concrete under binary addition of lime mud and fly ash （L5F15） could reach 50.47 MPa at 84 days ages， which was 12.7% higher than that under single addition （L20）， and the micro-pores of the cementitious system are obviously reduced. The addition of fly ash could improve the chloride penetration resistance and carbonization resistance of lime mud concrete. The practical prediction model of carbonation depth of lime mud concrete was established， and the correlation was significant.
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