The effect of pumice powder on the self-compactability of pumice aggregate lightweight concrete

Kurt, Murat; Gül, Muhammed Said; Gül, Rüstem; Aydın, Abdulkadir Cüneyt; Kotan, Türkay

doi:10.1016/j.conbuildmat.2015.11.043

Cited by 85 publications

(25 citation statements)

References 19 publications

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“…For a decade (i.e., 1985-1995), wooden structure, steel structure, and concrete structure prefab averaged 18%, 74%, and 8%, respectively, of the total prefabricated housing in Japan [41]. The trend may be different today and plausibly change with the development of lightweight concrete that fulfills strength requirements [42,43]. Moreover, due to its high compressive strength, precast concrete is used as load-bearing stabilizing systems for high-rise…”

Section: Load-bearing Materials Classificationmentioning

confidence: 99%

Performance of Modular Prefabricated Architecture: Case Study-Based Review and Future Pathways

2016

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Even though tightened building energy efficiency standards are implemented periodically in many countries, existing buildings continually consume a momentous quota of the total primary energy. Energy efficiency solutions range from material components to bulk systems. A technique of building construction, referred to as prefabricated architecture (prefab), is increasing in reputation. Prefab encompasses the offsite fabrication of building components to a greater degree of finish as bulk building structures and systems, and their assembly on-site. In this context, prefab improves the speed of construction, quality of architecture, efficiency of materials, and worker safety, while limiting environmental impacts of construction, as compared to conventional site-built construction practices. Quite recently, a 57 story skyscraper was built in 19 days using prefabricated modules. From the building physics point of view, the bulk systems and tighter integration method of prefab minimizes thermal bridges. This study seeks to clearly characterize the levels of prefab and to investigate the performance of modular prefab; considering acoustic constrain, seismic resistance, thermal behavior, energy consumption, and life cycle analysis of existing prefab cases and, thus, provides a dynamic case study-based review. Generally, prefab can be categorized into components, panels (2D), modules (3D), hybrids, and unitized whole buildings. On average, greenhouse gas emissions from conventional construction were higher than for modular construction, not discounting some individual discrepancies. Few studies have focused on monitored data on prefab and occupants' comfort but additional studies are required to understand the public's perception of the technology. The scope of the work examined will be of interest to building engineers, manufacturers, and energy experts, as well as serve as a foundational reference for future study.

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Section: Load-bearing Materials Classificationmentioning

confidence: 99%

Performance of Modular Prefabricated Architecture: Case Study-Based Review and Future Pathways

2016

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“…Concrete is considered as a cement-based composite which contains aggregates held together by hydrated cement paste [8]. Composite concrete gains strength with cement hydration.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Fly Ash Concrete with Scanning Electron Microscopy and X-Ray Diffraction

Uzbaş¹,

Aydın²

2019

Adv. Sci. Technol. Res. J.

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In this study, the effects of using different ratios of fly ash on hydration products as well as the mechanical and microstructural properties of hardened concrete were investigated. Portland cement was replaced with 5%, 10%, 15% and 20% fly ash (FA) by weight. The microstructural properties of the obtained samples were investigated by means of X-ray diffraction (XRD) and Scanning electron microscopy (SEM). Fly ash has negative effect on 7 days concrete strength; however, it was seen that fly ash increases the compressive strength of 28 and 90 days concrete. The XRD analysis showed that the ratio of calcium hydroxide (CH), which is produced by hydration, decreases depending on the concrete age and the amount of fly ash. The SEM analysis showed that the usage of fly ash decreases gaps and increases C-S-H which is also a hydration production. When Portland cement was replaced with 10% fly ash by weight, compressive strength has increased and microstructure of concrete has improved. The reason for this is filling of gaps by fly ash and the decrease in the amount of Ca(OH) 2 due to the reaction between fly ash and Ca(OH) 2 . Within this scope, the development in microstructure of fly ash concrete was evaluated in 90 days duration and a change of the development with compressive strength was investigated.

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“…[14]. According to TS EN 196-8, total heat of hydration of BAB cement should not be over the value of 70 cal/g at the end of the 28 th day or when determined by isothermal conduction calorimeter method at the end of the 28 th day [9,[18][19][20][21].…”

Section: Methodsmentioning

confidence: 99%

Hydration properties of boron modified active belite cement concrete

Aydın¹,

Kan²,

Fayetorbay³

et al. 2018

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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The effect of pumice powder on the self-compactability of pumice aggregate lightweight concrete

Cited by 85 publications

References 19 publications

Performance of Modular Prefabricated Architecture: Case Study-Based Review and Future Pathways

Performance of Modular Prefabricated Architecture: Case Study-Based Review and Future Pathways

Analysis of Fly Ash Concrete with Scanning Electron Microscopy and X-Ray Diffraction

Hydration properties of boron modified active belite cement concrete

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