干硬性混凝土抗冻性能研究  

Research on the Frost Resistance of Dry Concrete

作　　者：郭傲[1] 赵铁军[1] 陆文攀[1] 代鑫旖 

机构地区：[1]青岛理工大学土木工程学院,青岛266033

出　　处：《硅酸盐通报》2015年第1期55-59,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家973基金项目(2009CB623203);青岛市基础研究-联合基金计划项目(13-1-4-115-jch)

摘　　要：为研究砂率、胶凝材料用量、矿物掺合料掺量、粉煤灰矿粉复掺比例不同因素作用下干硬性混凝土的抗冻性能,对16组正交配合比的混凝土试件进行了快速冻融循环试验。冻融循环结束后,对其相对动弹模量和质量损失率进行了测定。试验结果表明:砂率为45%,胶凝材料用量为425kg/m3,粉煤灰和矿粉的复掺比例为2∶1或1∶1时抗冻性良好。其中,由于干硬性混凝土含水率较小,矿物掺合料的火山灰反应颇为缓慢,其对抗冻性的影响未得到良好发挥。For the study of anti-frost property of dry concrete under different factors,sand ratio,dosage of cementitious material,dosage of mineral admixture,ratio of fly ash and mineral powder. It has carried on the fast freeze-thaw cycle test to the 16 group specimens in the method of orthogonal mix design. After the freeze-thaw cycles,the relative dynamic elastic modulus and mass loss rate was determined. Experimental results show that： in the sand ratio of 45%,the dosage of cementitious material is 425 kg / m^3,the ratio of fly ash and mineral powder is 2∶ 1,the frost resistance of dry concrete performs good. Which,due to the less moisture content in the dry concrete,ash mineral admixtures are slow to react,its influence on frost resistance is not good.

关 键 词：干硬性混凝土 抗冻性 配合比优化 矿物掺合料 

分 类 号：TU528[建筑科学—建筑技术科学]