不同水胶比及粉煤灰掺量混凝土的耐久性能  

The Effect of Fly Ash Content and Different Water-binder Ratio on the Durability of Concrete

作　　者：李勇[1] LI Yong(School of Civil Engineering and Architecture,Huanghuai University,Zhumadian 463000,China)

机构地区：[1]黄淮学院建筑工程学院,驻马店463000

出　　处：《结构工程师》2019年第1期205-209,共5页Structural Engineers

摘　　要：为研究不同水胶比和粉煤灰掺量混凝土的耐久性能,采用质量损失和相对动弹性模量作为试件耐久性评价指标,对三种粉煤灰掺量和水胶比的混凝土试件在自然浸泡、冻融循环、干湿循环条件下的耐久性能进行了实验研究。结果表明:混凝土中粉煤灰掺入比控制在0.15、水胶比控制在0.3时,混凝土的抗腐蚀性、抗干湿环境和抗冻融环境性能最强,实际工程中可以优先考虑;三种环境条件下,冻融环境对混凝土耐久性能损坏最为突出。In order to study the effect of fly ash content and different water-cement ratio on the durability of concrete, in this paper the durability of three kinds of concrete specimens with different fly ash content and different water-binder ratio was tested studied in the conditions of natural soaking, freeze-thaw cycle,dry and wet cycle by using the mass loss and relative dynamic elastic modulus as specimen durability evaluation index. The results show that among the three specimens, the concrete of 30% water-cement ratio and 15% fly ash has the strongest performance of corrosion resistance,anti-dry environment and anti-freeze-thaw environmental,and Practical projects can be given priority. The condition of freeze-thaw is the most damaging to durability of concrete.

关 键 词：粉煤灰 水胶比 质量损失 相对动弹性模量 

分 类 号：TU528[建筑科学—建筑技术科学]