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首页> 美国卫生研究院文献>Materials >Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue
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Preparation of Green Low Strength Mixture for Foundation Reinforcement Treatment by Using Fly Ash and Waste Coal Gangue

机译：粉煤灰和废煤Gang石制备绿色低强度混合料用于地基加固处理

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摘要

Effective foundation reinforcement treatment is essential for modern large and complex infrastructure, while it is significant for developing new green high-performance materials for foundation reinforcement. This study investigates a new green concrete by using high volume fly-ash and coal gangue aggregates, which is expected to apply for foundation treatment of modern infrastructure with high loading-bear ability. In this experiment, 12 mix proportions of fly ash coal gangue mixture (the material name, abbreviated FGM) were designed, and its mechanical properties and durability performance were investigated. The mechanical properties of FGM include compressive strength, dynamic elastic modulus, dynamic shear modulus, Poisson’s ratio, and the stress–strain behaviors. The durability performance was evaluated by the parameters of acid resistance, which simulated an acid circumstance. After that, the environmental effects about carbon emission of this material were also investigated. Results show that the FGM with 84.6% wastes utilizing rate is a cost-effective material for foundation reinforcing treatment. Its compressive strength at 28 days and 60 days can reach more than 8 MPa and 10 MPa, respectively. After being immersed in the acid environment for 140 days, the mass loss (%) of the material could be under 3.5%. The greenness shows that the e-CO indices of FGM are lower than 20 kg/MPa·m , and the e-energy indices are at below 150 MJ/MPa·m . FGM has the advantages of acid resistance, waste recycling, and lower carbon emissions than the previous methods for foundation improvement.
机译：有效的地基加固处理对于现代大型复杂基础设施至关重要，同时对于开发新型绿色高性能地基加固材料也很重要。本研究使用大量粉煤灰和煤石骨料研究一种新型绿色混凝土，有望将其用于具有高承载能力的现代基础设施的地基处理。在该实验中，设计了12种粉煤灰煤12石混合物的混合比例（材料名称，简称FGM），并研究了其机械性能和耐久性能。 FGM的机械性能包括抗压强度，动态弹性模量，动态剪切模量，泊松比和应力应变行为。通过模拟酸性环境的耐酸性参数来评估耐久性能。之后，还研究了这种材料的碳排放对环境的影响。结果表明，FGM废料利用率为84.6％，是一种经济有效的基础加固材料。它在28天和60天时的抗压强度分别可以达到8 MPa和10 MPa以上。在酸性环境中浸泡140天后，材料的质量损失（％）可能低于3.5％。绿色表明，FGM的e-CO指数低于20 kg / MPa·m，e能量指数低于150 MJ / MPa·m。与以前的基础改良方法相比，FGM具有耐酸，废物回收和碳排放低的优点。

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