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首页> 外文会议>Oceans (Conference) >Use of a Low-Cost Concrete-Like Fluorogypsum-Based Blend for Applications in Underwater and Coastal Protection Structures
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Use of a Low-Cost Concrete-Like Fluorogypsum-Based Blend for Applications in Underwater and Coastal Protection Structures

机译：在水下和沿海保护结构中使用基于低成本的混凝土型氟缺口型混合物

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This research aims to develop a concrete-like material for underwater construction applications by using fluorogypsum (FG, an industrial by-product of hydrofluoric acid production), class C fly ash, and type II Portland cement. Two Response Surface Models (RSMs) were derived based on compressive strength tests and expansion measurements on FG-based blend cylindrical samples after 28-day curing. The developed RSMs allow accurate prediction of the compressive strength and volumetric expansion as functions of the relative content in weight of different components in the FG-based blend material. Using these RSMs, a composition with promising strength and durability properties was identified. Additional mechanical and physical properties that are significant for structural applications were also investigated experimentally for this composition, confirming that the select composition could be a promising substitute for ordinary concrete and/or limestone. The effects of environmental actions on the mechanical and durability properties of the FG-based blend were investigated by immersing samples in seawater for a period of one year. The results of this experimental investigation suggest that the developed FG-based blend is a promising material for underwater applications (e.g., as oyster cultch) and coastal protection structures (e.g., for the construction of artificial reefs and breakwaters), at a significantly lower cost than other materials commonly used for the construction of these structures. Additionally, the unit weight of the proposed material is significantly lower than that of ordinary concrete and limestone, which contributes to a longer life span of the underwater structure by reducing its sinking rate into the soft soil typically found, e.g., in the US Gulf Coast region.
机译：该研究旨在通过使用氟缺口（FG，氢氟酸生产），C型粉煤灰和II型波特兰水泥，开发用于水下施工应用的混凝土材料。基于抗压强度试验和膨胀测量在28天固化后，基于FG基混合圆柱样品的膨胀强度试验和扩展测量来得出两个响应表面模型（RSMS）。开发的RSMS允许准确地预测压缩强度和体积膨胀作为FG基混合物材料中不同组分重量的相对内容的功能。使用这些RSM，确定了具有有希望的强度和耐久性性质的组合物。对于该组合​​物，还研究了对结构应用具有重要的额外机械和物理性质，确认选择组合物可以是普通混凝土和/或石灰石的有望替代品。通过将海水中的样品浸入一年，研究了环境动作对基于FG基混合物的机械和耐久性的影响。该实验研究结果表明，发达的FG基混合物是用于水下应用（例如，作为牡蛎植物）和沿海保护结构的有希望的材料（例如，用于建造人造珊瑚礁和防波器），其成本显着降低而不是常用用于构建这些结构的材料。另外，所提出的材料的单位重量显着低于普通混凝土和石灰石的单位重量，这通过将其沉降率降低到通常被发现的软土中，这有助于水下结构的更长的寿命，例如，在美国墨西哥湾沿岸地区。

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