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材料导报  2019, Vol. 33 Issue (14): 2348-2353    https://doi.org/10.11896/cldb.18040280
  无机非金属及其复合材料 |
硅灰对掺有无碱速凝剂水泥浆体性能的影响
陈超1,2, 孙振平1,2
1 同济大学材料科学与工程学院,上海 201804;
2 先进土木工程材料教育部重点实验室,上海 201804
Effect of Silica Fume on the Properties of Cement Paste with Alkali-free Accelerator
CHEN Chao1,2, SUN Zhenping1,2
1 School of Materials Science and Engineering, Tongji University, Shanghai 201804;
2 Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Shanghai 201804
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摘要 本工作通过测定不同硅灰掺量下,掺有无碱速凝剂水泥浆体的凝结时间、抗压强度、水化放热、早期体积变化、喷射回弹率等性能,研究了硅灰对掺有无碱速凝剂水泥浆体性能的影响。结果表明,掺加适量硅灰可以缩短掺有无碱速凝剂水泥浆体的凝结时间,提高喷射混凝土的抗压强度,降低喷射混凝土的回弹率,同时可以促进水泥水化。此外,根据水泥浆体早期体积变化和水化放热特点,可以将掺有无碱速凝剂水泥浆体的早期水化进程划分为四个阶段,即溶解-结晶期、晶体生长期、水化加速期和稳定期,硅灰对掺有无碱速凝剂水泥浆体的早期水化的影响主要表现在晶体生长期和水化加速期。
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陈超
孙振平
关键词:  硅灰  无碱速凝剂  水泥浆体    
Abstract: This study evaluates the effect of silica fume on the properties of cement paste with alkali-free accelerator. Setting times, compressive strength, hydration heat emission, early volume change and rebound rate of accelerated cement paste with different silica fume dosage were measured. The results show that a proper dosage of silica fume can shorten the setting time and increase the compressive strength of the accele-rated cement paste, decrease the rebound rate of shotcrete and promote the cement hydration. Moreover, according to the characteristics of the early volume change and hydration heat emission curve, the hydration process of the cement paste with alkali-free accelerator can be divided into four periods, including dissolution-crystallization period, crystal growth period, acceleration period and stable period. The effect of silica fume on the properties of cement paste with alkali-free accelerator mainly manifest in crystal growth period and acceleration period.
Key words:  silica fume    alkali-free accelerator    cement paste
                    发布日期:  2019-06-19
ZTFLH:  TU528.042  
基金资助: 十三五国家重点专项(2016YFC0701004);国家自然科学基金(51678441);高铁联合基金(U1534207)
通讯作者:  grtzhp@163.com   
作者简介:  陈超,同济大学在读硕士研究生。于2012年到2016年在同济大学获得学士学位。主要研究方向是水泥和无碱速凝剂。孙振平,同济大学材料学院土木工程材料系主任。于1987年到1992年在同济大学获得学士学位,1992年到1995年在同济大学获得硕士学位,1999年到2002年在同济大学获得博士学位。主要研究方向是水泥外加剂、水泥水化和混凝土等。
引用本文:    
陈超, 孙振平. 硅灰对掺有无碱速凝剂水泥浆体性能的影响[J]. 材料导报, 2019, 33(14): 2348-2353.
CHEN Chao, SUN Zhenping. Effect of Silica Fume on the Properties of Cement Paste with Alkali-free Accelerator. Materials Reports, 2019, 33(14): 2348-2353.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.18040280  或          http://www.mater-rep.com/CN/Y2019/V33/I14/2348
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