固色剂对彩色混凝土性能的影响  

Discussion on Influence of Color Fixing Agent on Performance of Colored Concrete

作　　者：吴昊[1] 王靖[1] 刘俊元[1] 计晔 

机构地区：[1]北京市建筑工程研究院有限责任公司,北京100039

出　　处：《混凝土世界》2022年第9期12-15,共4页China Concrete

摘　　要：在彩色混凝土中掺入自制掺合材料—固色剂,可以有效抑制混凝土“返碱”现象的发生,也可改善彩色混凝土的耐久性和装饰效果。试验结果表明,在掺加颜料和固色剂时,混凝土的工作性能和保坍性能有所降低,需要提高外加剂的掺量;固色剂掺量为替代胶凝材料10%时为宜,此时混凝土的工作性能最优;分别掺入平均粒径1.0μm、5.0μm、10.0μm的固色剂进行试验,结果表明,掺入10.0μm粒径固色剂的混凝土试件表观质量最优;加入一定量铁系无机颜料会导致水泥水化产物的构成比例发生变化,颜料超掺会降低混凝土强度;而固色剂由于自身活性指数高,比表面积大等特点,加入后可起到良好的补强和填充作用,对混凝土强度有促进作用。By adding self-made admixture-color fixing agent,the phenomenon of"alkali release"on colored concrete can be effectively inhibited,and the durability and decorative effect of colored concrete can also be improved.The test shows that the working performance and slump retention performance of concrete will be reduced when adding pigments and color fixing agents,which needs to be solved by increasing the amount of chemicaladmixture.The working performance of concrete is the best when 10%cementing material is replaced by color fixing agent.The color fixing agents with average particle size of 1.0μm,5.0μm and 10.0μm were used in the test,the results shows that the apparent quality of concrete specimens with 10.0μm color fixing agent was the best.The proportionof cement hydration products will be changed by incorporated iron inorganic pigments,and the concrete strength could be reduced when excessive incorporation of pigment.Because the color fixing agent has the characteristics of high activity index and large specific surface area,it can play a good role in reinforcing and filling concrete after adding,and promote the concrete strength.

关 键 词：彩色混凝土 固色剂 抑制返碱 工作性 强度 

分 类 号：TU528[建筑科学—建筑技术科学]