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首页> 外文期刊>International journal of sustainable engineering >Mechanical and durability performance of sustainable bacteria blended fly ash concrete: an experimental study
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Mechanical and durability performance of sustainable bacteria blended fly ash concrete: an experimental study

机译：可持续细菌掺合粉煤灰混凝土的机械性能和耐久性能：一项实验研究

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摘要

This study investigates the effects of various dosages of bacteria on the properties of sustainable bacteria blended fly ash (FA) concrete. Different series of concrete mixtures were designed, with Series C being the plain concrete mix (no FA and bacteria). Series CF contained FA concrete mixes that had 10%, 20% and 30% FA content. Series CB and CBF were prepared with bacteria with varying dosages. Surface deposition of calcium carbonate crystals was found to improve strength and decreased sorptivity by 30-60%, depending on the type of bacteria and FA proportion. The best results in comparison with normal and FA concrete for compressive strength (CS) were obtained to be 31.76 MPa. The bacteria solution to water ratio had a positive effect on strength and sorptivity property but with increasing ratio. This study also applies multiple regression analysisin estimating the CS of concrete that contains FA at a fixed value of bacterial dosage at different curing times. The present paper also shows a mathematical model to predict the CS of concrete with bacteria solution to water ratios. The X-ray diffraction and SEM analysis indicated the formation of calcite crystals in bacterial concrete specimens.
机译：这项研究调查了各种剂量的细菌对可持续细菌掺合粉煤灰（FA）混凝土性能的影响。设计了不同系列的混凝土混合物，C系列为普通混凝土混合物（不含FA和细菌）。 CF系列包含FA含量为10％，20％和30％的FA混凝土混合物。用不同剂量的细菌制备CB和CBF系列。发现碳酸钙晶体的表面沉积可提高强度，并降低吸附性30-60％，具体取决于细菌的类型和FA比例。与普通混凝土和FA混凝土相比，抗压强度（CS）的最佳结果为31.76 MPa。细菌溶液与水的比例对强度和吸附性能有积极影响，但比例增加。这项研究还应用多元回归分析来估计在不同养护时间含细菌剂量固定值的FA的混凝土的CS。本文还显示了一种数学模型，可预测细菌溶液与水的比值对混凝土的CS影响。 X射线衍射和SEM分析表明在细菌混凝土样品中形成了方解石晶体。

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