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再生混凝土骨料强化方法研究进展
Research Progress on Modification Methods of Recycled Concrete Aggregate
2020年第12期
再生混凝土骨料(RCA);附着砂浆;强化方法;再生混凝土;力学性能;耐久性能
Recycled concrete aggregate; Adhered mortar; Modification method; Recycled concrete; Mechanical property; Durability
2020年第12期
10.19761/j.1000-4637.2020.12.087.05
浙江省自然科学基金项目(LY20E080012);绍兴市科技计划创新项目(2018C30007);国家级大学生创新创业训练计划项目(201710349022)。
梁超锋1,2,杜孝敏1,裘锦瑜1,高越青1,WORKNEHHAILEAB Meles1
1.绍兴文理学院 建筑工程系,浙江 绍兴 312000;2.同济大学 建筑工程系,上海 200092

梁超锋1,2,杜孝敏1,裘锦瑜1,高越青1,WORKNEHHAILEAB Meles1

梁超锋,杜孝敏,裘锦瑜,等.再生混凝土骨料强化方法研究进展[J].混凝土与水泥制品,2020(12):87-91.

LIANG C F,DU X M,QIU J Y,et al.Research Progress on Modification Methods of Recycled Concrete Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):87-91.

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摘   要:再生混凝土骨料(RCA)表层砂浆的多孔性和高吸水性对再生骨料混凝土的力学性能和耐久性能不利,去除和强化RCA表层砂浆是提高RCA性能的两种主要方法。基于此,总结了聚合物、硅酸钠、微粉、CO2碳化、微生物碳酸盐沉积等RCA表层附着砂浆强化方法的研究现状,分析了各RCA强化方法的优缺点,并提出了有待进一步研究的问题,以推进再生混凝土的应用。 Abstract: The porosity and high water absorption of recycled concrete aggregate (RCA) surface mortar are detrimental to the mechanical properties and durability of recycled aggregate concrete. Removal and modification of RCA surface mortar are the two main ways to improve RCA performance. Based on this, the progress on various modification approaches of RCA surface mortar such as polymer coating, sodium silicate modification, micro-powder filling, CO2 carbonation and microbial carbonate deposition is summarized, the advantages and disadvantages of each RCA modification method are analyzed, and the problems to be further studied are put forward to promote the application of recycled concrete.
英文名 : Research Progress on Modification Methods of Recycled Concrete Aggregate
刊期 : 2020年第12期
关键词 : 再生混凝土骨料(RCA);附着砂浆;强化方法;再生混凝土;力学性能;耐久性能
Key words : Recycled concrete aggregate; Adhered mortar; Modification method; Recycled concrete; Mechanical property; Durability
刊期 : 2020年第12期
DOI : 10.19761/j.1000-4637.2020.12.087.05
文章编号 :
基金项目 : 浙江省自然科学基金项目(LY20E080012);绍兴市科技计划创新项目(2018C30007);国家级大学生创新创业训练计划项目(201710349022)。
作者 : 梁超锋1,2,杜孝敏1,裘锦瑜1,高越青1,WORKNEHHAILEAB Meles1
单位 : 1.绍兴文理学院 建筑工程系,浙江 绍兴 312000;2.同济大学 建筑工程系,上海 200092

梁超锋1,2,杜孝敏1,裘锦瑜1,高越青1,WORKNEHHAILEAB Meles1

梁超锋,杜孝敏,裘锦瑜,等.再生混凝土骨料强化方法研究进展[J].混凝土与水泥制品,2020(12):87-91.

LIANG C F,DU X M,QIU J Y,et al.Research Progress on Modification Methods of Recycled Concrete Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):87-91.

摘要
参数
结论
参考文献
引用本文

摘   要:再生混凝土骨料(RCA)表层砂浆的多孔性和高吸水性对再生骨料混凝土的力学性能和耐久性能不利,去除和强化RCA表层砂浆是提高RCA性能的两种主要方法。基于此,总结了聚合物、硅酸钠、微粉、CO2碳化、微生物碳酸盐沉积等RCA表层附着砂浆强化方法的研究现状,分析了各RCA强化方法的优缺点,并提出了有待进一步研究的问题,以推进再生混凝土的应用。

Abstract: The porosity and high water absorption of recycled concrete aggregate (RCA) surface mortar are detrimental to the mechanical properties and durability of recycled aggregate concrete. Removal and modification of RCA surface mortar are the two main ways to improve RCA performance. Based on this, the progress on various modification approaches of RCA surface mortar such as polymer coating, sodium silicate modification, micro-powder filling, CO2 carbonation and microbial carbonate deposition is summarized, the advantages and disadvantages of each RCA modification method are analyzed, and the problems to be further studied are put forward to promote the application of recycled concrete.

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(1)结合两阶段混合法,采用火山灰材料预处理RCA,不仅经济成本低,便于施工,且可显著提高RAC的力学性能和耐久性能,是推进RCA工程应用的改性方法之一。同时,未来可以考虑高岭土粉、玻璃粉和锂渣粉等其他高活性微粉对RCA的改性研究。
(2)加速碳化不仅可显著提升RCA的性能,同时可吸收水泥和热电等工业排放的CO2,环境效益显著。未来可加强工业化RCA加速碳化技术和设备的研发。
 (3)RCA微生物碳酸盐沉积是一种低耗能且环保的RCA改性技术,有较大的应用潜力。未来可加强微生物菌种选取、碳酸盐沉积环境条件优化等方面的研究,从而达到有效快速改善RCA性能的目的。

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梁超锋,杜孝敏,裘锦瑜,等.再生混凝土骨料强化方法研究进展[J].混凝土与水泥制品,2020(12):87-91.

LIANG C F,DU X M,QIU J Y,et al.Research Progress on Modification Methods of Recycled Concrete Aggregate[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(12):87-91.

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