低收缩高黏结黑色高性能混凝土的性能试验研究

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发布时间：2020-01-06 00:00:00

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低收缩高黏结黑色高性能混凝土的性能试验研究

Experimental Study on Performance of Low Shrinkage and High Bond Black High Performance Concrete

２０19年第12期

黑色混凝土；黏结强度；收缩；色泽；耐磨损；高性能

Black concrete; Bond strength; Shrinkage; Color; Wear resistance; High performance

２０19年第12期

10.19761/j.1000-4637.2019.12.012.06

国家重点研发计划（2016YFC0701907）。

夏中升1,2，沙建芳1,2，刘建忠1,2，郭飞1,2，徐海源1,2

1.高性能土木工程材料国家重点实验室，南京 210008；2.江苏苏博特新材料股份有限公司，南京 211103

夏中升1,2，沙建芳1,2，刘建忠1,2，郭飞1,2，徐海源1,2

夏中升,沙建芳,刘建忠,等.低收缩高黏结黑色高性能混凝土的性能试验研究[J].混凝土与水泥制品,2019(12):12-17.

XIA Z S,SHA J F,LIU J Z,et al.Experimental Study on Performance of Low Shrinkage and High Bond Black High Performance Concrete[J].China Concrete and Cement Products,2019(12):12-17.

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1000

摘要：研究了着色剂、外加剂掺量、配合比参数等对混凝土力学性能、水化产物形成、收缩变形性能、耐磨损能力的影响规律，再通过对既有混凝土界面进行不同的预处理方式，研究了界面粗糙度、干燥状态等对新旧混凝土界面黏结性能的影响。结果表明：高掺量铁黑降低混凝土力学性能，碳黑与铁黑复配有助于提升力学性能；着色剂粒子的加入有助于氢氧化钙的结晶形成，但对于钙矾石影响较小；混凝土的耐磨损性能与水胶比、含气量等试验参数相关，降低浆体含气量、选取合适的水胶比来获得较高的基体强度，可提升混凝土的耐磨损性能。采用胶材水化温升抑制和收缩补偿复合技术，可实现混凝土分阶段全过程收缩变形调控。较高的界面混凝土强度等级、较大的表面粗糙度以及表面预湿处理，有助于提高新旧混凝土界面黏结性能。 Abstract: The influence mechanism of colorants, admixtures and mix parameters on the surface color and workability of concrete, as well as its influence on the mechanical properties, shrinkage and deformation properties and wear resistance of concrete were studied. In addition, the influence of interface roughness and drying state on the bonding properties of new and old concrete interface was studied by different pretreatment methods of existing concrete interface. The results show that high content of iron black reduces the mechanical properties of concrete, and the combination of carbon black and iron black helps to improve the mechanical properties. The addition of colorant particles helps to form calcium hydroxide crystals, but has little effect on ettringite. The abrasion resistance of concrete is related to the test parameters such as water-binder ratio and air content. Reducing the air content of slurry and choosing appropriate water-binder ratio to obtain higher matrix strength can improve the abrasion resistance of concrete. By using hydration temperature rise inhibitor and high performance expansion agent, shrinkage suppression compensation can be realized in the whole stage. Higher strength grade of interfacial concrete, greater surface roughness and surface pre-wetting treatment are helpful to improve the interfacial bonding performance of new and old concrete.

英文名 : Experimental Study on Performance of Low Shrinkage and High Bond Black High Performance Concrete

刊期 : ２０19年第12期

关键词 : 黑色混凝土；黏结强度；收缩；色泽；耐磨损；高性能

Key words : Black concrete; Bond strength; Shrinkage; Color; Wear resistance; High performance

刊期 : ２０19年第12期

DOI : 10.19761/j.1000-4637.2019.12.012.06

文章编号 :

基金项目 : 国家重点研发计划（2016YFC0701907）。

作者 : 夏中升1,2，沙建芳1,2，刘建忠1,2，郭飞1,2，徐海源1,2

单位 : 1.高性能土木工程材料国家重点实验室，南京 210008；2.江苏苏博特新材料股份有限公司，南京 211103

夏中升1,2，沙建芳1,2，刘建忠1,2，郭飞1,2，徐海源1,2

夏中升,沙建芳,刘建忠,等.低收缩高黏结黑色高性能混凝土的性能试验研究[J].混凝土与水泥制品,2019(12):12-17.

XIA Z S,SHA J F,LIU J Z,et al.Experimental Study on Performance of Low Shrinkage and High Bond Black High Performance Concrete[J].China Concrete and Cement Products,2019(12):12-17.

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摘要

参数

结论

参考文献

引用本文

摘要：研究了着色剂、外加剂掺量、配合比参数等对混凝土力学性能、水化产物形成、收缩变形性能、耐磨损能力的影响规律，再通过对既有混凝土界面进行不同的预处理方式，研究了界面粗糙度、干燥状态等对新旧混凝土界面黏结性能的影响。结果表明：高掺量铁黑降低混凝土力学性能，碳黑与铁黑复配有助于提升力学性能；着色剂粒子的加入有助于氢氧化钙的结晶形成，但对于钙矾石影响较小；混凝土的耐磨损性能与水胶比、含气量等试验参数相关，降低浆体含气量、选取合适的水胶比来获得较高的基体强度，可提升混凝土的耐磨损性能。采用胶材水化温升抑制和收缩补偿复合技术，可实现混凝土分阶段全过程收缩变形调控。较高的界面混凝土强度等级、较大的表面粗糙度以及表面预湿处理，有助于提高新旧混凝土界面黏结性能。
Abstract: The influence mechanism of colorants, admixtures and mix parameters on the surface color and workability of concrete, as well as its influence on the mechanical properties, shrinkage and deformation properties and wear resistance of concrete were studied. In addition, the influence of interface roughness and drying state on the bonding properties of new and old concrete interface was studied by different pretreatment methods of existing concrete interface. The results show that high content of iron black reduces the mechanical properties of concrete, and the combination of carbon black and iron black helps to improve the mechanical properties. The addition of colorant particles helps to form calcium hydroxide crystals, but has little effect on ettringite. The abrasion resistance of concrete is related to the test parameters such as water-binder ratio and air content. Reducing the air content of slurry and choosing appropriate water-binder ratio to obtain higher matrix strength can improve the abrasion resistance of concrete. By using hydration temperature rise inhibitor and high performance expansion agent, shrinkage suppression compensation can be realized in the whole stage. Higher strength grade of interfacial concrete, greater surface roughness and surface pre-wetting treatment are helpful to improve the interfacial bonding performance of new and old concrete.

关键词:

黑色混凝土；黏结强度；收缩；色泽；耐磨损；高性能

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低收缩高黏结黑色高性能混凝土的性能试验研究

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