Strength Properties of Concrete Using Pumice Aggregate as Partial Replacement of Coarse Aggregate

The work studied the use of special concrete, specifically lightweight concrete, by incorporating pumice as a natural aggregate. One significant disadvantage of nominal concrete is its high dead load, or self-weight, which makes it economically inefficient as a structural material. In contrast, lightweight concrete, with its low density, offers advantages such as reduced dead loads and improved thermal insulation. This reduced density is achieved by partially replacing the coarse aggregate with pumice in the concrete mix. The investigation aimed to compare nominal concrete with lightweight concrete using grade M20. The lightweight concrete was created by replacing different proportions of the coarse aggregate with pumice, ranging from 0%, 20%, 40%, and 60%. The objective of the work was to determine the compressive strength and split tensile strength of the lightweight concrete. The results were then compared with those of conventional concrete to identify the optimal percentage of replacement that provides better strength and meets the structural recommendations. The work aimed to explore the benefits of using lightweight concrete with pumice as a replacement material, assess its strength characteristics, and determine the most favorable replacement percentage for achieving improved strength and meeting structural requirements.

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The Effect of Polypropylene Fibers on Compressive and Split Tensile Strength of Lightweight Concrete

Sultan,

Gaus,

Yudasaputra

et al. 2024

Int. J. Res. Granthaalayah

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This study was carried out to design lightweight concrete, which is enriched with polypropylene fibers using coarse pumice and sand fine aggregates. Lightweight concrete specimens were classified into distinct groups based on fibers content employed, namely a control group with 0 kg/m³ and the experimental incorporating 0.1 kg/m³, 0.3 kg/m³, 0.5 kg/m³, and 0.7 kg/m³ varying quantities of polypropylene fibers. Subsequently, after a curing period of 28 days, the hardened concrete test was conducted on cylinder specimens measuring 150 mm x 300 mm. The consistency of the fresh concrete mixture was tested using the Abrams cone test, which revealed a decrease in the workability of fibers-reinforced concrete with an increase in fibers volume in the mixture. The test aimed to determine the effect of polypropylene fibers on compressive and tensile strength of lightweight concrete. The optimal compressive and split tensile strength was observed at fibers volume fraction of 0.5, to obtain 7.84 MPa, or 56.68% increase in compressive strength, and 2.12 MPa or 42.86% rise in tensile strength. Based on compressive and split tensile strength obtained from this study, concrete was classified as highly lightweight structural concrete, which served as an insulator.

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Strength Properties of Concrete Using Pumice Aggregate as Partial Replacement of Coarse Aggregate

Cited by 3 publications

References 2 publications

A state-of-the-art review - mechanical properties of light weight concrete by utilizing sintered fly ash aggregate

A state-of-the-art review - mechanical properties of light weight concrete by utilizing sintered fly ash aggregate

Utilizing pumice for enhanced structural lightweight concrete

The Effect of Polypropylene Fibers on Compressive and Split Tensile Strength of Lightweight Concrete

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