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发明公开
CN103043943A 一种高速铁路板式无砟轨道填充层自密实混凝土专用改性材料 有权

一种高速铁路板式无砟轨道填充层自密实混凝土专用改性材料
摘要：
本发明公开一种高速铁路板式无砟轨道填充层自密实混凝土专用改性材料，按质量百分数计，包含粉煤灰：40%—70%，碳酸钙石粉：20%—30%，可再分散乳胶粉：0%—10%，羟丙基甲基纤维素：0%—10%和硅酸铝镁：0%—30%，由上述组分混合而成。本发明提供了一种可以应用于密闭空间灌注自密实混凝土的专用改性材料。能够在不改变自密实混凝土施工性能的前提下，解决自密实混凝土离析、泌水、表面浮浆等等问题，更为重要的是它可以消除填充层混凝土硬化后在表面形成的软弱联接层问题，保证填充层与上层轨道板的粘结强度，提高结构耐久性。
摘要（英）：

The invention discloses a special modified material for self-compacting concrete of a plate-type ballastless track packing layer of a high-speed railway. The special modified material is formed by mixing the following components in percentage by weight: 40%-70% of coal ash, 20%-30% of calcium carbonate powder, 0%-10% of re-dispersible latex powder, 0%-10% of hydroxypropyl methylcellulose and 0%-30% of magnesium aluminum silicate. The invention provides the special modified material which can be applied to fillingself-compacting concrete to sealed space. The special modified material disclosed by the invention can be used for solving the problems such as segregation, bleeding, surface laitance and the like of the self-compacting concrete on the condition of not changing the construction performances of the self-compacting concrete. More importantly, a problem that a weak connecting layer is formed on the surface of the hardened filling layer concrete can be solved; bonding strength of the filling layer and the upper track board is ensured; and the structural durability is improved.

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