温和地区低抗冻等级混凝土含气量控制标准的试验研究

EXPERIMENT STUDY ON AIR CONTENT STANDARD OF CONCRETE UNDER LOW FREEZING RESISTANCE GRADES IN MILD REGIONS

为细化研究我国气候温和地区混凝土在低抗冻等级条件下的含气量控制标准,以C25、C30和C35等3种典型二级配混凝土作为基准配合比,基于同强度等级设计理念,制备了7组C25混凝土、6组C30混凝土和5组C35混凝土。研究了F50和F100抗冻等级条件下混凝土的相对动弹模量与含气量之间的关联性,并根据抗冻试验结果提出了低抗冻等级条件下的混凝土含气量控制标准。

In order to study the air content standard of concrete under low freezing resistance grades in climate temperate regions of China, seven groups of C25 concrete, six groups of C30 concrete, and five groups of C35 concrete were prepared based on the design method of equivalent strength grade. The relationship between the relative dynamic elastic modulus and air content of concrete under the condition of F50 and F100 freezing resistance grades was studied, and the corresponding air content controlling standard was proposed according to the freezing resistance experimental results.