摘要
对掺掺合料的引气混凝土性能进行了研究。结果表明：在水胶比相同的情况下，无论是掺粉煤灰还是矿渣粉，混凝土抗压强度都呈随着掺量的增加而降低的趋势。单掺粉煤灰或矿渣粉的混凝土相对动弹性模量随粉煤灰或矿渣粉掺量的增加呈降低的趋势，质量损失呈增大趋势。粉煤灰和矿渣粉复掺时，当总掺量为40％且比例为1：1时，试样300次冻融循环质量损失最小，但相对动弹性模量与单掺矿渣粉的混凝土接近。硬化混凝土试件的空气含量在7．78％-10．65％之间，气泡间距范围在0．202-0．382mm之间，混凝土表现出了较好的抗冻性。
The freezing resistance of concrete with admixture were investigated.The results show that under the same water/cement ratio,mixing fly ash or slag powder,the concrete compressive strength is reduced with the increase of dosage.28 d age,the relative dynamic elastic modulus of concrete only mixing fly ash or ground slag with a trend of decrease with the increase of the dosage of fly ash or Wound slag, mass loss showed a trend of increase.When fly ash and slag powder mixed, the total account of content is 40% and the ratio of 1：1 ,the quality loss of the sample is minimum after 300 times freezeing-thawing cycles.But the relative dynamic elastic modulus are close to only mixing slag powder concrete.The air content of hardened concrete specimens is between 7.78%-10.65% ,and the range of bubble spacing between 0.202-0.382 mm, concrete shows good frost resistance.
出处
《混凝土》
CAS
北大核心
2016年第8期146-148,共3页
Concrete
关键词
引气混凝土
矿物掺合料
抗冻性
air-entraining concrete
mineral admixtures
frost resistance
