非粉体纳米材料复合细颗粒掺合料对隧道衬砌混凝土性能影响的试验研究

摘要

The strength and durability of tunnel lining concrete are directly relative to the economic efficiency and safety of a project. This paper studies the effects of admixture combined with class I fly ash mixed with single or compound nano-material with various types and physical properties on the strength of gel sand samples regarding safety, environmental protection, economic efficiency, and construction. The physico-mechanical performances of non-power nano-material, power nano-material, and silica fume techniques were contrasted as the concrete binding materials. Meanwhile, an experimental test was carried out regarding the strength and durability of concrete in which the non-power nano-material combined with fine compound admixture was added, and the results indicate that it is cost effective, environmentally friendly, and is durable.%隧道衬砌混凝土强度及耐久性能直接关系到工程的经济性和安全性.文章以安全、环保、经济及施工人性化为出发点,重点研究了以Ⅰ级粉煤灰配合辅助细颗粒材料微珠作为掺合料,单一或复合掺入不同种类、不同物理性态的纳米材料对胶砂试件强度的影响,对比分析非粉体纳米材料、粉体纳米材料、微硅粉应用于混凝土胶凝材料其物理力学性能,并对以非粉体纳米材料配合细颗粒复合掺合料作为胶凝材料的混凝土强度、耐久性能进行了试验研究.结果表明,非粉体纳米材料与复合掺合料复合应用于隧道衬砌混凝土具有经济、环保、耐久性好的优点,有推广应用前景.