摘要
对四种不同强度等级(M2.5,M5,M7.5和M10)的混合砂浆试块,经历200℃4,00℃,600℃和800℃四种不同温度,采用自然冷却和喷水冷却方式后进行了强度试验,得到了两种冷却方式后砂浆试块强度随温度变化的曲线及高温后砂浆强度的拟合公式,分析了砂浆强度的影响因素及高温后砂浆强度的退化机理。研究表明,经历温度越高,砂浆强度降低越大。对于同种砂浆,经历相同温度后,不同的冷却方式对强度也有较大的影响。研究结果为高温后砌体结构的安全性评估提供了依据。
By testing the four different composite mortar samples（M2.5,M5,M7.5 and M10）which suffered four different temperatures（200℃,400℃,600℃ and 800℃） and cooled by air and water,the curves of change of the strength of each grade mortar along with the change of temperature after two cooled types and the simulation formula of motar compressive strength after high temperature were gained.The influence factors and the degradation mechanism of the mortar strength after high temperature were analyzed.The research indicated that the higher the temperature the mortar suffered,the more loss of the mortar strength.Different cooled types had biggish influence on the strength of the same mortar suffered the same temperature.The results of research can offer a support to the safety assessment of masonry structure after high temperature.
出处
《四川建筑科学研究》
北大核心
2011年第5期219-221,共3页
Sichuan Building Science
关键词
高温
砂浆
冷却方式
性能
high temperature
mortar
cooled type
performance
