轻集料混凝土的抗渗性能研究

Research on the Resistant of Lightweight Aggregate Concrete to Water Penetration

利用快速氯离子渗透试验和溶液气压法研究了粉煤灰、矿渣和硅灰三种矿物掺合料对轻集料混凝土抗渗性能的影响.结果表明,掺合料的加入能够显著提高轻集料混凝土的抗渗性能;利用SEM、孔结构试验探讨了掺合料提高轻集料混凝土抗渗性的作用机理,研究结果为深入开展高性能轻集料混凝土的研究提供了参考.

<Abstrcat> The permeability of lightweight aggregate concrete is studied. Some ef forts are taken to increase the resistance of lightweight aggregate concrete (L C) to water penetration by using the mineral admixture of fly ash, granulated bl ast furnace slag or silica fume. Accelerated chloride penetrability test and liq uid atmosphere press method are used to study the anti-permeability of lightwei ght aggregate concrete. The test results show that fly ash, granulated blast fur nace slag and silica fume can reduce the permeability of lightweight agg regate concrete, but the effect of granulated blast furnace slag is poor. According to the SEM observing and pore structure analyzing result, the interface self-rein forc ing effect model is presented and the reinforced mechanism of mineral mixture o n LC is discussed. The results give a reference to the res earch about high performance lightweight aggregate concrete.