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作为新型环保型的混凝土,高性能混凝土具有较高的工作性和较高的强度,同时具有体积稳定性。它的主要指标是耐久性,具有低水胶比的特点,同时在配制过程中掺入了大量的活性掺合料。高性能混凝土拥有很多优良性能,但由于混凝土特有的脆性和易开裂性,有可能会使混凝土结构提前劣化使其耐久性变差。这就要求我们要高度注意混凝土早期开裂的现象,必须控制导致其发生早起开裂的因素并采取措施提高其耐久性。本文中使用的复合型外加剂,有利于控制高性能混凝土的早期开裂现象,保证耐久性这一高性能混凝土的最重要指标。
As a new type of environmentally friendly concrete, high performance concrete has high workability and high strength, while having the volume stability. Its main indicator is durability, with a low water-cement ratio, while blending a large amount of active admixture in the formulation process. High-performance concrete has many excellent properties, but due to its inherent brittleness and easy-to-crack properties, concrete may deteriorate its durability in advance. This requires that we pay close attention to the early cracking of concrete, control the factors that cause it to crack early and take measures to improve its durability. The composite admixture used in this paper is conducive to controlling the early cracking of high performance concrete to ensure the durability of the most important indicator of high performance concrete.