低气压对水泥基材料性能及水化进程的影响

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中文摘要：采用强度试验、X射线衍射仪和综合热分析仪等手段,研究了低气压对水泥基材料性能及水化进程的影响.结果表明:低养护气压延缓了水泥水化进程,水化产物生成量减小,且养护气压越低,影响效果越显著,3～7 d龄期时出现明显的水化平台期;低养护气压下水泥基材料孔隙结构劣化,凝胶孔占比增长幅度最大;养护气压越低,水泥基材料吸水速率越快,吸水量越大;水泥基材料的吸水量、吸水速率及相对吸水率均随着环境气压的降低明显减小.

外文标题：Effect of Low Atmospheric Pressure Environment on Properties and Hydration Process of Cement-Based Materials

外文摘要：The effects of low atmospheric pressure on the properties and hydration process of cement-based materials were studied by strength tests,X-ray scanning and comprehensive thermal analysis.The results show that the low curing atmospheric pressure delays the cement hydration process,the generation of hydration products decreases,and the lower the curing atmospheric pressure,the more significant the impact effect.An obvious hydration plateau period appeares at the age of 3-7 days.Under the low curing atmospheric pressure,the pore structure of the cement-based marerials deteriorates,and the proportions of gel pore growth is the largest.The lower the curing atmospheric pressure,the higher the water absorption rate,and the greater water absorption amount.However,the water absorption,water absorption rate and relative water absorption rate of the cement-based marerials all decrease significantly with the decrease of environmental atmospheric pressure.

外文关键词：

low atmospheric pressurecement hydrationpore structurecapillary water absorption propertyrelative water absorption

作者：

包卫星、孙勋、陈锐

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作者单位：

长安大学公路学院,陕西西安 710064

中交第二公路工程局有限公司,陕西西安 710065

中交集团山区长大桥隧建设技术研发中心,陕西西安 710199

关键词：

低气压水泥水化孔隙结构毛细吸水性能相对吸水率

基金：

新疆维吾尔自治区重大科技专项项目陕西省自然科学基金资助项目中央高校基本科研业务费专项资金项目陕西省自然科学基础研究计划项目

项目编号：

2020A03003-72022JM-2283001022113022021JM-180

出版年：

2024

DOI：

10.3969/j.issn.1007-9629.2024.09.001

建筑材料学报

同济大学

建筑材料学报

CSTPCD北大核心

影响因子：1.046

ISSN：1007-9629

年,卷(期)：2024.27(9)

参考文献量11