钙硅比对铜尾矿蒸压加气混凝土的影响

金属矿山 ›› 2025, Vol. 54 ›› Issue (10): 273-278.

钙硅比对铜尾矿蒸压加气混凝土的影响

吴然圆¹　孙大定¹　许庆虎²　许荣盛²

1. 安徽交控工程集团交控工业化建造有限公司,安徽合肥 230000;2. 安徽建筑大学土木工程学院,安徽合肥 230601

出版日期:2025-10-15 发布日期:2025-11-10
作者简介:吴然圆(1985—),男,高级工程师。
基金资助:
国家自然科学基金项目(编号:52308227);安徽交控工程集团有限公司科研项目(编号:HYB20240197,HYB20240198)。

Effect of Calcium-Silicon Ratio on Autoclaved Aerated Concrete with Copper Tailings

WU Ranyuan¹　SUN Dading¹　XU Qinghu²　XU Rongsheng²

1. Anhui Transportation Engineering Group Industrialized Construction Co. ,Ltd. ,Hefei 230000,China;
2. School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,Chima

Online:2025-10-15 Published:2025-11-10

摘要/Abstract

摘要： 为提高铜尾矿资源化利用率,开展了以铜尾矿为硅质材料替代50%河砂制备蒸压加气混凝土(AAC)研
究,分析了钙硅比(Ca/ Si)对AAC 物理力学性能及微观结构的影响。内容包括对干密度、抗压强度、导热系数的影响,
并结合XRD、FTIR、SEM 等微观表征手段进行分析。结果表明:当Ca/ Si 为0. 75 时,AAC 综合性能最优,其干密度为
605. 7 kg/ m3,抗压强度达3. 6 MPa,导热系数为0. 151 W/ (m·K),满足《蒸压加气混凝土性能试验方法》(GB/ T
11969—2020)中A3. 5 B06 级标准要求。微观分析表明,托勃莫来石的晶体形貌随Ca/ Si 增大呈现柳叶状→板条状→
板状→针状的演变规律,Ca/ Si 为0. 75 时,板状托勃莫来石含量最高,与最优力学性能相对应。研究为铜尾矿在绿色
建材中的高效利用提供了理论依据和技术支撑。

关键词: 铜尾矿　蒸压加气混凝土　硅质材料　钙硅比　抗压强度　水化产物

Abstract: In order to improve the resource utilization rate of copper tailings,a study was conducted to replace 50% of
river sand with copper tailings as a siliceous material for preparing autoclaved aerated concrete (AAC). The effects of the calcium-
silicon ratio (Ca/ Si) on the physical and mechanical properties and microstructure of AAC were analyzed. The research
included the impact on dry density,compressive strength,and thermal conductivity,combined with microscopic characterization
techniques such as XRD,FTIR,and SEM. The results showed that when the Ca/ Si ratio was 0. 75,the AAC exhibited optimal
comprehensive performance,with a dry density of 605. 7 kg/ m3,compressive strength of 3. 6 MPa,and thermal conductivity of
0. 151 W/ (m·K),meeting the A3. 5 B06 grade requirements specified in the Test Methods for the Performance of Autoclaved
Aerated Concrete(GB/ T 11969—2020). Microscopic analysis revealed that the crystal morphology of tobermorite evolved from
willow-leaf,platelet,plate,needle shapes as the Ca/ Si ratio increased. When the Ca/ Si ratio was 0. 75,the platelet tobermorite
content was highest,corresponding to the optimal mechanical performance. This study provides a theoretical basis and technical
support for the efficient utilization of copper tailings in green building materials.

Key words: copper tailings,autoclaved aerated concrete,siliceous material,calcium-silica ratio,compressive strength,hydration
product

中图分类号:

TD982
TU528

吴然圆　孙大定　许庆虎　许荣盛. 钙硅比对铜尾矿蒸压加气混凝土的影响[J]. 金属矿山, 2025, 54(10): 273-278.

WU Ranyuan　SUN Dading　XU Qinghu　XU Rongsheng. Effect of Calcium-Silicon Ratio on Autoclaved Aerated Concrete with Copper Tailings[J]. Metal Mine, 2025, 54(10): 273-278.

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