Strength and Microstructure of Sustainable High Performance Concrete

Saran*, A.S.Adithya; Harish., T

doi:10.35940/ijrte.d8532.118419

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…Based on the hydration products generated after 28 days, the microstructure and strength attributes were connected. The development of hydration products in the microstructure of concrete mixes was used to analyze and explain the cause for the strength of the concrete [12].…”

Section: Morphology By Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Characteristics and Preliminary Study of Ceramic Concretes

Ab Hadi,

Abdul Latif,

Syed Abu Bakar

et al. 2023

JSMT

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One of the most adaptable and frequently used building materials in the world is concrete. It is flexible in terms of size and shape, sturdy, long-lasting, low-maintenance, fireproof, and easy to use. However, further research is needed to increase the durability and sustainability of this material since concrete technology is still indeveloping industry. Therefore, it's crucial to comprehend how microstructure and characteristics interact in terms of how they affect concrete's strength, dimensional stability, and durability.The findings of this research arecrucial in identifying the properties and characteristics of the ceramic concrete used for bridge construction or others. Advanced research to ascertain the hardness and physical qualities and features of ceramic concrete material is required. Thus, it will help to produce a reliable data for engineer to refer for their future works or project. To ascertain its hardness and physical characteristics, research has been conducted on ceramic concrete for several types of grades. In the current study, the ceramic concrete was tested through the physical and Vickers-hardness tests. The X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) on samples were performed to observe the phases and morphology of the ceramic concrete, respectively. For results of physical testing, the density and water absorption correlate to each other by the denser of the sample, the lower of water absorption and the porosity level of the ceramic concrete. Based on the Vickers micro hardness test, it can be seen that longer curing days affected the hardness, where the concretes of grade 30 and 40 at 28 curing days had better hardness value. Next, Scanning Electron Microscopy (SEM) on samples shown almost same microstructure, whilethe dominant phase of all ceramic concrete grades was SiO2 by the XRD analysis. In summary, better properties of ceramic concretes were indicated at 28 curing days for both grades of ceramic concretes.

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Section: Morphology By Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Characteristics and Preliminary Study of Ceramic Concretes

Ab Hadi,

Abdul Latif,

Syed Abu Bakar

et al. 2023

JSMT

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Fresh, Mechanical, and Microstructural Properties Investigation on the Combined Effect of Biomedical Waste Incinerator Ash and Bagasse Ash for High-Strength Concrete

Girma

Demiss

2022

Advances in Materials Science and Engineering

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The combination effect of supplementary cementitious materials in the production of high-strength concrete production is an effective way to reduce the amount of cement required while contributing to environmental sustainability and cost. This study aims to assess the microstructural investigation on the combined effect of biomedical waste incinerator ash (BWIA) and bagasse ash (BA) as a partial replacement of cement in high-strength concrete production. The cement was partially replaced with BA (0%, 2.5%, 5%, and 7.5%) and BWIA (0%, 2.5%, 5%, and 7.5%). The mix design was done as per the ACI 211-4R-93 mix design standard. Slump, slump flowability, density, and compaction factor tests were conducted for freshly mixed concrete. Mechanical properties of the hardened concrete from four different mixes were also determined for the 7- and 28-day cured specimens. The microstructural properties of the hardened concrete for all mixes were also investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD) tests. Based on the experimental results, the compressive strength of high-strength concrete at every 2.5% BA and 2.5% BWIA replacement of cement in the concrete mix at 7 days of curing was slightly decreased, while at 28 days of curing, the compressive strength of the control mix (51.8 MPa) decreased as compared to the mix codes' compressive strength of the BWIA and BA5 and BWIA and BA10 mix codes, at 54.8 MPa and 52.5 MPa, respectively. The SEM micrographs showed that the partial replacement of cement by the BWIA and BA leads to a decrease in the pore proportion in the enlarged interfacial transition zone (ITZ), reduced CH crystals, and a denser C–S–H gel as compared to the control specimen. The XRD pattern showed the existence of portlandite, ettringite, okenite, quartz, and calcite in the cement and aggregate phases. As a result, the usage of BWIA and BA has a significant impact on the properties of high-strength concrete in fresh, hardened, and microstructure high-strength concrete.

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Use of Industrial Silica Sand as a Fine Aggregate in Concrete—An Explorative Study

Malathy¹,

Sentilkumar²,

Prakash³

et al. 2022

Buildings

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Industrial silica sand is a by-product obtained from the industries like paint, paper, rubber etc. It has a similar property with river sand and& M sand. This study explores the effect of high content of silica sand as a partial replacement for fine aggregate for concrete making in construction purpose. In this present research four types of silica sand from two different industrial units (coarser silica sand (VC and TC) and finer silica sand (VF and TF)) were used. The physical classification and morphology observation of silica sand through scanning electron microscope (SEM), energy-dispersive X-ray (EDAX), X-ray fluorescence (XRF) is examined. Fresh and hardened concrete properties were performed for the six sand samples, with two grades (M20 and M30) of concrete. No new compositions or phases were identified in silica sand concrete. Both fine and coarse silica sands were finer than river sand and M sand, as evaluated from the physical classification. The workability of silica sand mix at a fresh state improves the concrete performance up to 40%. The mix, which contains 80% coarser silica sand (TC) with 20% river sand, attained the maximum compressive strength of 34.5 Mpa and tensile strength of 3.5 Mpa at 28 days, which was the greatest of all the mixes. The combination of silica sand and river sand or M sand showed the superior impact of the concrete over the discrete concrete. SEM images showed the well-developed hydrated products like calcium silicate hydrate (CSH), calcium hydroxide (CH) and ettringite in all concrete mixes. It was observed from the XRD pattern that all concrete mixes containing silica sand have a high peak of quartz (SiO2), and calcium silicate hydrate (CSH) exhibits the formation of hydration products in the concrete. Similar stretching and bending patterns of silica sand concrete relates the pattern of nominal sand concrete as observed from Fourier-transform infrared spectroscopy (FTIR).

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Strength and Microstructure of Sustainable High Performance Concrete

Cited by 3 publications

References 7 publications

Characteristics and Preliminary Study of Ceramic Concretes

Characteristics and Preliminary Study of Ceramic Concretes

Fresh, Mechanical, and Microstructural Properties Investigation on the Combined Effect of Biomedical Waste Incinerator Ash and Bagasse Ash for High-Strength Concrete

Use of Industrial Silica Sand as a Fine Aggregate in Concrete—An Explorative Study

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