Investigation of Strength and Workability in No-Fines Concrete

Thombre, Kiran B; More, Abhyuday; Bhagat, S. R.

doi:10.17577/ijertv5is090206

Cited by 6 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, its use is limited to pathways and parking [16], road pavement with limited traffic [17,18], and blocks instead of bricks [19,20]. Several attempts have been conducted to improve the strength of no-fines concrete by using partial replacement (up to 20%) of coarse aggregates with fine aggregates [18,21,22], reduced w/c and a/c ratios [23][24][25][26], fibers [27][28][29], admixtures including superplasticizers [26,30], and un-crushed aggregates [31], recycled coarse aggregates [32], or mixes of un-crushed and recycled aggregates [33]. Despite these efforts, still the strength of no-fines concrete is questionable.…”

Section: Introductionmentioning

confidence: 99%

Quality of Recycled Aggregates and Compressive Strength of No-Fines Recycled-Aggregate Concrete

Dahri

Memon

Oad

et al. 2021

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

This research paper presents the laboratory investigations of the compressive strength of no-fines concrete made with demolished waste as coarse aggregates used in percentages from 20% to 100%. The basic properties of aggregates were determined. Sieve analysis of both conventional and recycled aggregates was conducted to ensure the existence of well-graded aggregates in concrete. Nine concrete mixes were designed with an aggregate-cement ratio of 4. Additionally, three batches were prepared (conventional, recycled, conventional no-fines concrete) and the results were compared. For all mixes, the water-cement ratio was equal to 0.5. In each batch, 5 cylinders of standard size (total 60 samples) were prepared and cured for 28 days. The weight of the specimens was determined and compressive strength was checked in a Universal Testing Machine under gradually increasing load. A decrease in weight and compressive strength was recorded for the batches of the proposed concrete. Results show that at 40% replacement level the loss of compressive strength is 19% and the weight reduction of the samples was equal to 9%.

show abstract

Section: Introductionmentioning

confidence: 99%

Quality of Recycled Aggregates and Compressive Strength of No-Fines Recycled-Aggregate Concrete

Dahri

Memon

Oad

et al. 2021

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

show abstract

“…In frame structures, the petition walls are free of charge where the construction of these non-structural elements with low-strength lightweight concrete would result in a subsequent reduction in the overall weight of the structure. NFC has many applications, [1][2][3][4][5][6][7][8][9][10][11][12][13], described in Part I [14]. Civil engineers have been challenged to transform waste into helpful building materials [13,15] and large quantities of raw materials and waste, in particular demolition waste, are used as recycled aggregates for the construction and use of nonfinished concrete waste, making it more economical compared to standard concrete [16,17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part II: No-Fines Vs. Ordinary Concrete

Buller

Tunio

Abro

et al. 2019

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

This study aims to investigate the effect of different gradations of coarse aggregates on mechanical properties of no-fines concrete (NFC). NFC reduces a structure’s self-weight, thus minimizing cost. The effects of coarse aggregate gradation on mechanical properties such as compressive strength, split tensile strength, and flexural strength were studied and compared at the end of 28-day water curing. A fixed cement- to-aggregate proportion 1:6 with 0.5 water/cement (w/c) ratio was adopted. Four gradations of coarse aggregates ranging between specific maximum and minimum size were used, namely 5mm-4mm, 10mm-4mm, 20mm-4mm and 20mm-15mm. The results of this study reveal the substantial effect of the gradation of coarse aggregates on strength properties compressive and tensile strength of NFC.

show abstract

Experimental Mechanical Characterization of Silica Fume-based No-fines Concrete Reinforced by Steel or Nylon Fibers

Hussain¹,

Ahmed²,

Ahmed³

et al. 2023

TOCIEJ

View full text Add to dashboard Cite

Aims: In this study, the mechanical characterization of no-fines concrete solutions is addressed experimentally, with the purpose of possibly increasing their strength by using silica fume and embedded fibers (steel and nylon fibers) as possible efficient reinforcement. Background: Due to competition between developed and advanced countries, the contemporary construction sector is currently experiencing a shortage of fundamental building materials. In this regard, no-fines concrete is becoming increasingly popular, and it has been proven in the literature that it can offer some advantages as an economic and lightweight solution compared to conventional concrete. However, experiments and investigations are still needed to investigate the potential mechanical advantages for its efficient use in buildings, given that the major limitation compared to normal concrete is represented by limited strength. Objective: The primary objective of the present study is to assess the mechanical strength of no-fines concrete samples in which steel fibers, nylon fibers, and partial cement replacement with silica fume are used. For this purpose, no-fines concrete specimens are produced with fixed mix proportions of 1:6 cement-aggregate (c-a) ratio, various coarse aggregate gradations ((20-10) mm and (10-5) mm), and fixed w/c ratio (0.42). Methods: The experiments are carried out on cubes, cylinders and prisms of concrete samples with various aggregate solutions. The nominal length of both types of fibers is fixed at 20 mm. Steel fibers with 1 mm in diameter and nylon fibers with 0.3 mm, 0.4 mm, 0.5 mm, or 0.6 mm diameters, respectively, are taken into account to explore their effects on compressive strength, split tensile strength, and flexural strength. Results: The presented experimental results showed various mechanical advantages, such as increased compressive, splitting tensile and flexural strength parameters, for most of the examined samples. Nylon fibers, in particular, proved to significantly increase compressive, splitting tensile, and flexural strength values, compared to normal concrete, with additional benefits compared to steel fibers (for the examined arrangements and configurations). Conclusion: Overall, the examined compositions and mixtures of silica fume-based no-fines concrete samples encourage further investigations for the optimization of these solutions. In this regard, in addition to mechanical capacities, further key parameters (such as weight, cost, impact on concrete microstructure, etc.) will be taken into account.

show abstract

Investigation of Strength and Workability in No-Fines Concrete

Cited by 6 publications

References 8 publications

Quality of Recycled Aggregates and Compressive Strength of No-Fines Recycled-Aggregate Concrete

Quality of Recycled Aggregates and Compressive Strength of No-Fines Recycled-Aggregate Concrete

Influence of Coarse Aggregate Gradation on the Mechnical Properties of Concrete, Part II: No-Fines Vs. Ordinary Concrete

Experimental Mechanical Characterization of Silica Fume-based No-fines Concrete Reinforced by Steel or Nylon Fibers

Contact Info

Product

Resources

About