凝灰岩粉对混凝土性能影响的试验研究  

Experimental study on the effect of tuff powder on the properties of concrete

作　　者：张平 马旭东 古龙龙 韩世界 郑海康 Zhang Ping;Ma Xudong;Gu Longlong;Han Shijie;Zheng Haikang(China Construction Western Construction Xinjiang Co.Ltd,Urumqi 830000,China)

机构地区：[1]中建西部建设新疆有限公司,新疆乌鲁木齐830000

出　　处：《建筑科学》2023年第3期22-26,共5页Building Science

摘　　要：为了探究凝灰岩粉在混凝土中的作用,采用不同细度的凝灰岩粉与粉煤灰对比,研究其对混凝土的抗压强度发展规律、抗氯离子渗透性能、抗碳化性能和抗冻性能等耐久性能的影响。结果表明:凝灰岩粉和粉煤灰在水化初期主要发挥微集料效应,而在水化后期发挥火山灰效应;同等条件下,凝灰岩粉越细,凝灰岩粉的火山灰效应就越大;粉煤灰的火山灰效应大于凝灰岩粉,从而使得粉煤灰混凝土的力学性能和耐久性能普遍优于凝灰岩混凝土;复掺粉煤灰能提高凝灰岩混凝土的力学性能和耐久性能。In order to explore the role of tuff powder in concrete,tuff powder with different fineness is compared with fly ash to study its influence on the durability of concrete,such as compressive strength development law,chloride ion penetration resistance,carbonation resistance and frost resistance.The results show that tuff powder and fly ash mainly exert micro aggregate effect in the early stage of hydration,and volcanic ash effect in the later stage of hydration.Under the same conditions,the finer the tuff powder,the greater the pozzolanic effect of tuff powder.The pozzolanic effect of fly ash is greater than that of tuff powder,so the mechanical properties and durability of fly ash concrete are generally better than that of tuff concrete.Adding fly ash can improve the mechanical properties and durability of tuff concrete.

关 键 词：凝灰岩粉 抗压强度 火山灰反应 耐久性 

分 类 号：TU528.01[建筑科学—建筑技术科学]