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混凝土与制品
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增效剂对混凝土力学性能和耐久性能的影响研究

作者:刘凯1,2,穆松1,2,蔡景顺1,2,马麒1,2,谢德擎1,2,石亮1,3

关键字:增效,剂,对,混凝土,力学性能,和,耐久,性能,的,

 
(1.江苏苏博特新材料股份有限公司,高性能土木工程材料国家重点实验室,江苏 南京  211103;
2.江苏省建筑科学研究院有限公司,江苏 南京  211003;3.上海苏科建筑技术发展有限公司,上海  201399)
    摘要:研究了3种混凝土增效剂(ATF-5、BTL-7.0和SBT-CS1000)对混凝土力学性能、抗氯离子渗透以及抗碳化性能的影响。结果表明,在水泥用量减少20 kg/m3的情况下,3种增效剂均能改善混凝土的和易性,并保证了混凝土56 d强度的发展。此外,SBT-CS1000还能够改善混凝土的抗碳化性能和抗氯离子渗透性能,当SBT-CS1000掺量为0.6%时,混凝土的28 d碳化深度和28 d氯离子扩散系数较对照组分别减小了13.2%、17.6%。
    关键词:增效剂;混凝土;力学性能;氯离子渗透;碳化
    中图分类号:TU528.042        文献标识码:A        文章编号:1001-702X(2020)09-0127-04
 
Effect of concrete synergist on mechanical properties and durability of concrete
LIU Kai1,2,MU Song1,2,CAI Jingshun1,2,MA Qi1,2,XIE Deqing1,2,SHI Liang1,3
(1.Jiangsu Sobute New Materials Co. Ltd,State Key Laboratory of High Performance Civil Engineering Material,
Nanjing 211103,China;2.Jiangsu Research Institute of Building Science Co. Ltd.,Nanjing 211003,China;
3.Shanghai Suke Building Technology Development Co. Ltd.,Shanghai 201399,China)
    Abstract:The effects of three concrete synergists(ATF-5,BTL-7.0 and SBT-CS1000) on the mechanical properties,chloride ion penetration resistance and carbonation resistance of concrete were investigated in this paper. The results show that under the condition of reducing the amount of cement by 20 kg/m3,the three synergists can improve the workability of concrete and ensure the development of 56 d strength of concrete. In addition,SBT-CS1000 can improve the carbonation resistance and chloride ion penetration resistance of concrete. When the SBT-CS1000 dosage is 0.6%,compared with the control group,the 28 d carbonization depth and 28 d chloride ion diffusion coefficient of concrete are reduced by 13.2% and 17.6%,respectively.
    Key words:synergist,concrete,mechanical property,chloride ion penetration,carbonization