Determination of Geopolymer Mortar Characterization Using Fly Ash and Pumice Sand

Sultan, Mufti Amir

doi:10.21660/2022.100.3630

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…Since the fly ash arena has no unique handling process and is often placed in open areas, it is referred to as a waste that can potentially cause environmental pollution. So, fly ash material is used as a substitute for cement that contributes 2.8 million tons of CO2 gas annually and is then referred to as an alternative to environmentally friendly concrete [23]. The types of fly ash commonly used as a concrete mix are types F and C. This study used type F fly ash (low calcium fly ash) since it is economical, environmentally friendly, and has good flowability.…”

Section: Fly Ashmentioning

confidence: 99%

Enhancing Performance of High-Strength Concrete Using Bacillus Megaterium as Self-Healing Agent

Mauludin

2024

GEOMATE

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The weak tensile properties of concrete allowed micro-cracks to emerge and propagate into macrocracks if they were left undetected. An innovation called self-healing concrete (SHC) was subsequently introduced, allowing concrete to cover micro-cracks independently without any human intervention. SHC utilizes healing agents in the form of bacteria, which react with oxygen and water when cracks occur, resulting in calcium carbonate (CaCO3) compounds that play a role in the concrete repair process. The aim of this study is to determine the effects of Bacillus megaterium on the compressive strength, flexural strength, depth of water penetration, and velocity of the 45 MPa high-strength concrete design based on ACI 211-4r.93 guidelines, with 25% of cement substitution by fly ash and 2% of bacteria percentage of the entire water composition. A 12.662% increase in compressive strength and a 1.690% increase in flexural strength were recorded for the age of 28 days bacterial concrete compared to the control concrete. The water penetration depth of the bacterial concrete was 4.49 cm, thereby meeting the DIN 1045 standard, which is less than 5 cm. From the ultrasonic pulse velocity (UPV) test, the average velocity value for bacterial concrete was 9.483 km/sec, which is categorized as having good concrete homogeneity based on the IS 1331 standard. This research offers promising insights into the SHC field by adding innovation to the design of high-quality bacterial concrete.

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Section: Fly Ashmentioning

confidence: 99%

Enhancing Performance of High-Strength Concrete Using Bacillus Megaterium as Self-Healing Agent

Mauludin

2024

GEOMATE

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“…Saputra et al [13] found that International Journal of GEOMATE, Dec., 2023 Vol.25, Issue 112, pp. [21][22][23][24][25][26][27][28][29][30][31] ISSN: 2186-2982 (P), 2186-2990 (O), Japan, DOI: https://doi.org /10.21660/2023.112.4083 Geotechnique, Construction Materials and Environment applying 5% NaOH for 30 minutes reduced lignin content by 1.33% while raising cellulose levels by 22.52% in Bemban fiber. Syarief et al [4] applied 4% NaOH to Bemban fiber for 30 and 60 minutes to get a bending value of 112.24 MPa and an impact value of 0.0208 Joules/mm 2 .…”

Section: Introductionmentioning

confidence: 99%

“…In addition to their benefits, geopolymers have drawbacks, such as brittle characteristics, which need the use of a mixed material to boost tensile strength, such as fiber [21]. Natural fibers have the benefits of being cost-effective, lightweight, having a high maximum strength to weight ratio, being renewable, having a low density, and requiring little energy to process [22], and so have the potential to be employed as material admixtures in the production of geopolymers [23]. The experimental test of modified Bemban fiber for mortar geopolymer was investigated in this research in order to investigate the physical and mechanical performance of specimen.…”

Section: Introductionmentioning

confidence: 99%

The Potential of Bemban Fiber as Raw Material of Geopolymer

Haryanti

2023

GEOMATE

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This study focuses on modifying Bemban fiber (Donax Canniformis) and assess its physical and mechanical properties as a material for concrete geopolymers. Bemban was cleaned and chopped into 20 cm pieces before being boiled for 60 minutes and dried at 75°C for 4 hours. Furthermore, the fiber was alkalized for 2 hours in a 3% NaOH solution. Three main aspects were investigated such as water content, cellulose content and the tensile strength of Bemban fiber. Moreover, the water absorption, porosity and compressive strength of mortar geopolymer using modified Bemban fiber were conducted in this research. The result research showed that the water content value of the Bemban fiber was 4% and met the requirements by SNI 06-3730-1995. Moreover, alkalization increased the cellulose content by 44.58% while decreasing the lignin content by 49.18% as well as shrinking the Bemban fiber diameter by 42%. The tensile strength of the Bemban fiber increases by 84.59%, and the fiber shape changes significantly. Carbon (C) and oxygen (O) are the most abundant elements in Bemban fiber. Using modified Bemban fiber in mortar geopolymers can reduce water absorption and porosity, especially the decrease in water absorption and porosity, together with the increased usage of Bemban fiber. Adding 1.5% modified Bemban fiber results in the lowest water absorption capacity and porosity, with physical parameters of 7.18% water absorption, 15.09% porosity, and the highest value of compressive strength is 5.93 MPa.

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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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Determination of Geopolymer Mortar Characterization Using Fly Ash and Pumice Sand

Cited by 3 publications

References 18 publications

Enhancing Performance of High-Strength Concrete Using Bacillus Megaterium as Self-Healing Agent

Enhancing Performance of High-Strength Concrete Using Bacillus Megaterium as Self-Healing Agent

The Potential of Bemban Fiber as Raw Material of Geopolymer

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

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