【摘要】 本文在分析当前大口径排水管生产和应用的基础上．研究了超低水灰比（W／C≤0．30）对大口径排水管用高强混凝土后期性能的影响。结果表明，在W／C≤0．30时，处于高湿环境中的密实混凝土在后期由于水分的侵入可引起内部大量微裂缝。进而导致混凝土后期性能的劣化。更多还原

【Abstract】 Based on the investigatbo of the pnduct and application of high-caliber sewers, the effect of very low W/C(≤0. 30)on the performance of concrete used in high-calibre sewers is investigated. The results sfor that, a fine unifondy distributed crack structure is visihle on the ground cube surfaces due to the water sfow permeability through high-compact concrete, herewith the durability of concrete is deteriorated.更多还原