泊江海子矿副井井塔施工组织设计与低温混凝土力学性能研究

发布时间：2018-06-22 08:46

  本文选题：粉煤灰 + 玄武岩纤维　； 参考：《安徽理工大学》2017年硕士论文

【摘要】：煤炭作为一种重要的资源,对国民经济起着至关重要的作用,主井和副井是煤炭采集中的重要的两个结构,主井主要负担矿井的运煤、进风、矿井的安全出口,副井是一个用来升降工作人员、设备、材料和提升矸石的井筒,还可兼做入风井和安全出口。施工组织设计是一个企业实现自己利益最大化的重要手段,通过编制施工组织设计,针对施工现场各种条件和工程所存在的问题制定相应的对策,这样做能够保证工程质量,同时保证在计划工期内完成工程,使工程在一个可控的范围内完工。本文主要介绍副井井塔的施工组织设计。粉煤灰作为一种工业废料应用在混凝土中,可以降低建筑物成本,玄武岩纤维作为一种新型纤维逐渐被应用在土木、消防、交通等领域。本文针对现场的混凝土力学性能进行了试验,研究了标养和标养后冻结条件下,不同玄武岩纤维掺量和不同粉煤灰掺量下玄武岩纤维粉煤灰混凝土的力学性能,其中,粉煤灰掺量为等量替代水泥掺量的0%、10%和15%,玄武岩纤维采用外掺的方式,分别为Okg/m3、2kg/m3、3kg/m3和4kg/m3,进行了标养后冻结-15℃条件下,玄武岩纤维粉煤灰混凝土的单轴抗压和劈裂抗拉强度试验,并研究了标养条件下,10%粉煤灰掺量下玄武岩纤维粉煤灰混凝土的抗折强度试验。单轴抗压和劈裂抗拉试验结果表明,标养后冻结-15℃条件下,当粉煤灰掺量一定时,玄武岩纤维粉煤灰混凝土的单轴抗压强度和劈裂抗拉强度均随玄武岩纤维掺量的增加呈现出先增大后减小的趋势,当粉煤灰掺量为10%、玄武岩纤维掺量为2kg/m3时,玄武岩纤维粉煤灰混凝土的单轴抗压强度最大,为44.8MPa,较普通混凝土提高了 6.71%,当粉煤灰掺量为15%、玄武岩纤维掺量为3kg/m3时,玄武岩纤维粉煤灰混凝土的劈裂抗拉强度最大,较普通混凝土提高了 17.1%。抗折强度试验结果表明,玄武岩纤维粉煤灰混凝土的抗折强度随玄武岩纤维掺量的增加,先增加后减少,其中,3kg/m3玄武岩纤维掺量时其抗折强度最优,为3.83MPa,较普通混凝土提高13.3%。
[Abstract]:As an important resource, coal plays an important role in the national economy. Main well and auxiliary well are two important structures in coal collection. The auxiliary well is a shaft for lifting workers, equipment, materials and gangue, and can be used as well as air shaft and safety exit. Construction organization design is an important means for an enterprise to maximize its own benefits. By compiling the construction organization design, corresponding countermeasures can be made in view of various conditions and problems existing in the construction site, so as to ensure the quality of the project. At the same time ensure that the project is completed within the planned time limit, so that the project is completed within a controllable range. This paper mainly introduces the construction organization design of auxiliary well tower. Fly ash is used in concrete as a kind of industrial waste, which can reduce the cost of buildings. As a new type of fiber, basalt fiber is gradually used in civil engineering, fire fighting, traffic and other fields. In this paper, the mechanical properties of basalt fiber fly ash concrete with different content of basalt fiber and different amount of fly ash are studied under the condition of standard culture and freezing after standard culture, and the mechanical properties of concrete with basalt fiber fly ash are studied in this paper. The content of fly ash is 0% and 15% of the same amount of cement instead of cement. Basalt fibers are mixed in the same way as Okg / m3kg / m3 and 4kg / m3 respectively. The uniaxial compressive strength and splitting tensile strength of basalt fiber fly ash concrete have been tested under the condition of freezing and freezing at -15 鈩，

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