When the recycled fine aggregate was substituted for the natural aggregate in concrete, the water/cement ratio increased by 17.6% compared to the control concrete. Sasanipou an Aslani [ 111 ] investigated the effect of superplasticizer on the slump of fresh concrete with the incorporation of fine and coarse recycled concrete aggregates.
WhatsApp: +86 18221755073Abhishek Maharishi and colleagues The results of the study indicate that substituting copper slag (CS) for fine natural aggregate (FNA) can greatly increase concrete's strength and durability by up to 40%. For concrete with exceptional strength and durability attributes, CS up to 40% FNA is advised.
WhatsApp: +86 18221755073Nowadays, utilization of RFA as a replacement to fine aggregates in concrete is being popularised. Major sources for RFA are concrete, bricks, glass, bitumen from the construction industry. ... The concrete with ferrochrome slag as coarse and fine aggregate showed increased compressive strength than control concrete (Panda et al., 2013 ...
WhatsApp: +86 18221755073The tensile strength of concrete has been identified in terms of splitting tensile strength and flexural strength. The effect of increasing the fine aggregate: coarse aggregate …
WhatsApp: +86 18221755073Recycling construction waste is a viable tactic for advancing environmentally friendly building methods. With regard to concrete applications, the purpose of this research is to determine whether it is feasible to use recycled fine concrete aggregates (RFA) in lieu of natural fine aggregates (NFA) and to lessen the environmental impact of natural resource depletion and …
WhatsApp: +86 18221755073In order to observe the effect of the fine aggregate sources on the compressive strength of concrete, concrete cylindrical specimens were cast with two widely used mixing ratios in Bangladesh ...
WhatsApp: +86 18221755073The concrete mix with 75% replacement of natural aggregates with construction and demolition aggregate (CDA), 10% replacement of fine aggregates with crumb rubber particle and 1% basalt fiber ...
WhatsApp: +86 18221755073Concrete's compressive strength was found to be on par with or higher than that of regular concrete when less than 40% copper slag was used in place of fine aggregate [26].Copper slag has the ability to replace admixtures in concrete and mortars [27].With CS and cement by-pass dust as stand-ins, the strength of cement mortars was examined.
WhatsApp: +86 18221755073In order to study the flexural fatigue resistance of calcium sulfate whisker-modified recycled fine aggregate concrete (RFAC), flexural fatigue cyclic loading tests at different stress levels (0.6, 0.7, and 0.9) considering a calcium sulfate whisker (CSW) admixture as the main influencing factor were designed. Furthermore, the fatigue life was analyzed, and fatigue …
WhatsApp: +86 18221755073Fine aggregate is widely used in the construction industry to increase the volume of concrete, which makes it a cost-effective if readily available. To achieve the best results, it is essential to have a thorough …
WhatsApp: +86 18221755073The crushed fine aggregate in the concrete was replaced with CBA at five different volume fractions of 0%, 25%, 50%, 75%, and , and the corresponding CBA concrete mixtures were named CBA00, CBA25, CBA50, CBA75, and CBA100, respectively. ... This phenomenon occurred because the substitution of CBA as fine aggregate increased the …
WhatsApp: +86 18221755073Role of fine aggregate in a concrete mix. The majority of the volume in the formulations for making a concrete mix is taken up by fine particles, which serve as the structural filler. You are able to have a …
WhatsApp: +86 18221755073Increased properties of specific gravity and fineness modulus with reduced percentage of water absorption and bulking volume would give a better performance. ... Aggregates significantly influences rheological and mechanical properties on both mortars and concrete. Fine aggregate being a main component in concrete production has a significant ...
WhatsApp: +86 18221755073In the flexural test, the change trend of the flexural strength of PET fiber-reinforced coal gangue fine aggregate concrete with the increase in PET fiber and the pressure-displacement curve of concrete were obtained, as shown in Figures 12 and 13. Figure 12. Open in figure viewer PowerPoint.
WhatsApp: +86 18221755073Aggregates containing any appreciable amount of flaky, soft, and porous materials are unsuitable for engineering constructions as their low resistance to weathering can cause surface defects such as cracks and breaks. Fine aggregate content is usually 35–45 % by mass or volume of the total aggregate content. 10.5 Fine Aggregate for Making ...
WhatsApp: +86 18221755073Crushing waste concrete into recycled fine aggregate (RFA) and recycled coarse aggregate to replace traditional building materials is a key measure to promote the sustainable development of the civil engineering industry [3].Recently, there has been a lot of research into replacing natural coarse aggregate with recycled coarse aggregate to prepare recycled …
WhatsApp: +86 18221755073Aggregate is classified as two different types, coarse and fine. Coarse aggregate is usually greater than 4.75 mm (retained on a No. 4 sieve), while fine aggregate is less than 4.75 mm …
WhatsApp: +86 18221755073The global construction industry is increasingly utilizing concrete prepared from recycled aggregate as a substitute for natural aggregate. However, the subpar performance of recycled fine aggregate (RFA) has resulted in its underutilization, particularly in the structural concrete exposed to challenging environments, including those involving chlorine salts and …
WhatsApp: +86 18221755073The usage of WFS as a sand replacement by 20% weight of fine aggregate has reported to increase the compressive strength (21.70%) of green concrete above control concrete. ( Ali et al., 2022 ). Thiruvenkitam et al. (2020) discovered that the elastic modulus, flexural strength, and compressive strength of the partial replaced concrete were ...
WhatsApp: +86 18221755073The average compressive strength of all the concrete mixes containing marble aggregate increased by 40% and 18% at 7 and 28 days, respectively. ... mechanical behavior of the concrete with fine ...
WhatsApp: +86 18221755073The fracture toughness of sand concrete is affected by aggregate characteristics. In order to study the possibility of exploiting tailings sand, available in large quantities in sand concrete, and find an approach to improve the toughness of sand concrete by selecting appropriate fine aggregate. Three distinct fine aggregates have been used. After …
WhatsApp: +86 18221755073Ultra-high performance concrete (UHPC) mixtures are typically developed using fine aggregate with a maximum size of 600 μm. From a sustainability point of view, use of …
WhatsApp: +86 18221755073Solid waste management is a major environmental challenge, especially in developing countries, with increasing amounts of waste glass (WG) and waste plastic (WP) not being recycled. In Ethiopia, managing WG and WP requires innovative recycling techniques. This study examines concrete properties with WG and WP as partial replacements for fine …
WhatsApp: +86 18221755073Natural disasters and human demolition create vast amounts of construction and demolition waste (CDW), with a substantial portion being concrete waste. Managing this concrete waste is a daunting challenge for developing countries with limited resources, aiming to mitigate its harmful environmental effects. Therefore, the proposed approach involves using …
WhatsApp: +86 18221755073The compressive strength of quarry dust concrete continued to increase with age for all the percentages of quarry dust contents. ... The suitability of crushed stone dust waste as fine aggregate ...
WhatsApp: +86 18221755073The results also prove the increase in the air content with the increase of fine aggregate, which is a fact that the higher percentages of fine aggregate in the mix lead to a higher permeability. Fig. 3 presents the slump flow and the flow time measured by the V-Funnel test at various ratios of fine/course aggregates. The figure shows that the ...
WhatsApp: +86 18221755073The increase in the volume of a given mass of fine aggregate caused by the presence of water is known as bulking. The water forms a film over the fine aggregate …
WhatsApp: +86 18221755073Although increased air content can make concrete more brittle, the change in air content resulting from 20% S r replacement in fine aggregate is negligible, as observed by Yang et al. 18.
WhatsApp: +86 18221755073The reported WA values for natural fine aggregate vary between 0.15 and 4.1%, with an average of 1.1%. In addition, the fRCA has lower density than natural sand, (Fig. 8). …
WhatsApp: +86 18221755073In this study, a 3D printable low-carbon concrete with 30% nano-silica (NS) pretreated recycled fine aggregates with 28 d compressive strength higher than 30 MPa is developed. The flowability, dynamic yield stress and plastic viscosity of the developed 3D printable mix are 210 mm, 320 Pa, and 12 Pa s, respectively.
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