摘要
为了提升高寒地区渡槽混凝土的耐久性,开展三因素四水平(L_(16)4^(3))的正交配合比抗冻性试验。结果表明,粉煤灰掺量对渡槽混凝土抗冻性的影响最为显著,尾矿砂掺量则对渡槽混凝土的导热系数影响最为显著;当粉煤灰掺量定为15%,尾矿砂掺量定为40%,粗骨料粒径15~20mm,渡槽的抗冻性和导热性能达到最佳状态,100次冻融循环后的相对动弹性模量为86%,质量损失率为0.4%,导热系数为2.15W/m·k。
In order to improve the durability of aqueduct concrete in alpine areas, the frost resistance test of orthogonal mix proportion with three factors and four levels(L_(16)4^(3)) was carried out. The results show that the content of fly ash has the most significant effect on the frost resistance of aqueduct concrete, and the content of tailings sand has the most significant effect on the thermal conductivity of aqueduct concrete. When the content of fly ash is 15%, the content of tailings sand is 40%, and the particle size of coarse aggregate is 15~20mm, the frost resistance and thermal conductivity of the aqueduct reach the best state. After 100 freeze-thaw cycles, the relative dynamic elastic modulus is 86%, the mass loss rate is 0.4%, and the thermal conductivity is 2.15W/m·k.
作者
倪明
NI Ming(Sinohydro Bureau 10 Co.Ltd.,Chengdu 610037,China)
出处
《水利科技与经济》
2023年第1期141-145,共5页
Water Conservancy Science and Technology and Economy
关键词
高寒地区
渡槽混凝土
粉煤灰
尾矿砂
抗冻性
导热性能
alpine region
aqueduct concrete
fly ash
tailings sand
frost resistance
thermal conductivity
