水泥的工业生产对温室气体排放有很大贡献,通过使用粉煤灰(FA)作为潜在的替代品来解决和减少这些排放至关重要。此外,氧化石墨烯(GO)被用作混凝土中的纳米粒子以增强其力学特性,抗变形性,和干燥收缩行为。然而,研究人员使用响应面法(RSM)来评估抗压强度(CS),抗拉强度(TS),抗弯强度(FS),弹性模量(ME),以5%的增量掺入5-15%FA的混凝土的干燥收缩(DS),加上0.05%,0.065%,和0.08%的GO作为潜在的纳米材料。通过在28天时使用约45MPa的设计目标CS的混合比例来制备混凝土样品。从调查结果来看,含10%FA和0.05%GO的混凝土表现出最大的CS,TS,FS,和62兆帕的ME值,4.96MPa,6.82MPa,和39.37GPa,相应的28天。此外,发现随着FA和GO量的增加,混凝土的DS降低。此外,在95%的显著性水平下,利用方差分析(ANOVA)进行应答预测模型的开发和验证.模型的确定系数(R2)值在94%至99.90%之间变化。研究表明,包括10%的粉煤灰(FA)作为水泥的替代品,当与0.05%GO结合使用时,在具体产生最好的结果。因此,这种方法对建筑业来说是一个很好的选择。
The industrial production of cement contributes significantly to greenhouse gas emissions, making it crucial to address and reduce these emissions by using fly ash (FA) as a potential replacement. Besides, Graphene oxide (GO) was utilized as nanoparticle in
concrete to augment its mechanical characteristics, deformation resistance, and drying shrinkage behaviours. However, the researchers used Response Surface Methodology (RSM) to evaluate the compressive strength (CS), tensile strength (TS), flexural strength (FS), modulus of elasticity (ME), and drying shrinkage (DS) of
concrete that was mixed with 5-15% FA at a 5% increment, along with 0.05%, 0.065%, and 0.08% of GO as potential nanomaterials. The
concrete samples were prepared by using mix proportions of design targeted CS of about 45 MPa at 28 days. From investigational outcomes, the
concrete with 10% FA and 0.05% GO exhibited the greatest CS, TS, FS, and ME values of 62 MPa, 4.96 MPa, 6.82 MPa, and 39.37 GPa, on 28 days correspondingly. Besides, a reduction in the DS of
concrete was found as the amounts of FA and GO increased. Moreover, the development and validation of response prediction models were conducted utilizing analysis of variance (ANOVA) at a significance level of 95%. The coefficient of determination (R2) values for the models varied from 94 to 99.90%. Research study indicated that including 10% fly ash (FA) as a substitute for cement, when combined with 0.05% GO, in concrete yields the best results. Therefore, this approach is an excellent option for the building sector.