آخرین محصولات

سرامیک خودرو چیست؛ مزایا، معایب و هرآنچه باید بدانید | مجله پدال

سرامیک خودرو چیست؟ مزایا و معایب آن. سرامیک بدنه خودرو یک نوع پوشش رنگ بدنه خودروست که علاوه بر زیبایی و درخشندگی، باعث افزایش مقاومت رنگ خودرو در برابر عوامل آسیب‌زا خواهد شد.

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Geopolymers as an alternative to Portland cement: An …

Geopolymers were used in many ancient constructions and the building units of geopolymer consist primarily TO 4 tetrahedrons (where T is Si or Al) [10], [11].The concrete made from geopolymer cements has good engineering properties [12], [13], [14] and appears to be a good alternative to conventional concrete. Geopolymeric concrete …

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(PDF) Properties of geopolymers

materials, ecological material. 1. INTRODUCTION. Geopolymers are m aterials based on exceptional physical, ch emical and mechanical. properties, new binder for fiber composites and new …

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دانلود مقالات ISI درباره سرامیک متخلخل + ترجمه فارسی

ولی در مورد سرامیک های متخلخل سه بعدی، روش های تولید به طور کلی در دو دسته، تولید سرامیک های فومی و غیرفومی تقسیم بندی می شوند. در این صفحه تعداد 212 مقاله تخصصی درباره سرامیک متخلخل که در نشریه ...

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Geopolymers Prepared by Microwave Treatments

Geopolymers are usually activated in highly alkaline solutions and alumino-silicate geopolymers are inorganic materials consisting of tetrahedral AlO 4 and SiO 4 units [1, 2].Essentially a mineral chemical compound or mixture of compounds consist of repeating units, for example, silico-aluminate (polysialate) (–Si–O–Al–O–) and is created …

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Production, characterization and performance of green …

Geopolymers pastes have the follows order regarding their BD; GPM > GPD1 > GPD2 > GPD3 > GPD4 > GPA > GPS. Figure 4 Bulk density of geopolymer variation hydrated for 3, 27 and 28 days.

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Production, characterization and performance of green …

The results showed that the compressive strength of geopolymers at 28 days of curing is directly proportional to the ratio of the alkali liquid. Ultimately, the best …

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Geopolymer technology: the current state of the art

A brief history and review of geopolymer technology is presented with the aim of introducing the technology and the vast categories of materials that may be synthesized by alkali-activation of aluminosilicates. The fundamental chemical and structural characteristics of geopolymers derived from metakaolin, fly ash and slag are …

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(PDF) Geopolymer: A Systematic Review of Methodologies

of solely GGBFS geopolymers and found that the 28 days compressive strength of 168.7 MPa was achieved with a solid/liquid ra tio of 3.0, alkaline activator ratio of 2.5, and formation of ...

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Geopolymer: A Systematic Review of Methodologies

Geopolymer is a product of a polycondensation reaction that yields a three-dimensional tecto-aluminosilicate matrix. Compared to unary geopolymer systems, …

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Phosphate-based geopolymers: a critical review

Phosphate-based geopolymers usually display an amorphous structure [], which is justified by the presence of a dome centered around 2θ = 27° in their X-ray diffractograms [14, 22, 26, 27].Additional research, carried out by Perera et al. [] and using a transmission electron microscope (TEM) equipped with energy-dispersive X-ray …

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Geopolymer additive manufacturing: A review

Geopolymers, also called 'inorganic polymers', are a class of inorganic materials with a three-dimensional framework structure formed as a result of alkaline- or alkali-silicate activation of aluminosilicate precursors at ambient or elevated temperature [3], [23].GPs consist of Si O Al chains or networks linked by covalent bonds [24].The general …

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پودر سرامیک چیست؛ طرز تهیه و کاربردهای آن | میکو

پودر سرامیک چیست ؟. با کاربردهای آن آشنا شوید. پودر سرامیکی یک ترکیب مخلوط از اکسیدهای مختلف و دانه‌های سرامیکی است که از آن در ساخت سازه‌های مختلف، استفاده می‌شود. از جمله مواد تشکیل دهنده ...

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Geopolymer: A Systematic Review of Methodologies

Red mud (bauxite residue) is a by-product generated during bauxite ore processing into alumina through the Bayer process. Sun et al. studied the mechanical and environmental characteristics of red mud geopolymers and found that the 28-day compressive strength of red mud geopolymers ranged from 35.2 MPa to 68.7 MPa. …

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Life-cycle analysis of geopolymers

LCA is a cross-media approach and allows for a more holistic investigation of products and services. The goal of this study is to provide guidance to geopolymer designers for the development of ecologically more advantageous geopolymers. 10.2. Life cycle assessment. 10.2.1.

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Geo-Engineering and Microstructural Properties of …

The main objective of this paper is therefore to provide a review of recent research on the incorporation of industrial waste such as FA, GGBS and RHA for …

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State of the art of geopolymers: A review

Geopolymers emerge as an ecological alternative for construction materials. These consist of a mixture of aluminosilicate sources and an alkaline solution that dissolves the silicon and aluminum monomers that come from the source to generate a gel called N–A–S–H that will control the main properties of the geopolymer. The geopolymer stands out for having …

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Geopolymers: Synthesis, Characterization and Applications

Geopolymers offer many advantages over OPC, such as excellent mechanical strength, increased durability, thermal resistance, and excellent stability in acidic and alkaline environments. Within these properties, mechanical strength, more specifically compressive strength, is the most important property for analyzing …

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Geopolymers and Their Matrix Composites: A State-of-the …

Geopolymers consisting of polymeric Si–O–Al networks are long-range, covalently bonded inorganic materials. In recent years, geopolymers and their composites have attracted considerable attentions in the fields of construction, metallurgy, and hazardous elements immobilization due to their unique properties such as low …

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مواد سرامیکی (خواص،کاربرد، طبقه بندی آن ها) | وب سایت عصر مواد

سرامیک چیست: این مواد ترکیباتی بین عناصر فلزی و غیر فلزی از قبیل اکسیدها ، نیترید ها، کاربید ها و یا تک عنصری مثل الماس و گرافیت هستند. پیوندها در سرامیک ها متغیر است، ممکن است یونی، کووالانت ...

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Geopolymer Institute – Promoting the …

Tiahuanaco Monuments (Tiwanaku / Pumapunku), Bolivia are made of geopolymer artificial stones created 1400 years ago. Transcript of the conference by Prof. Joseph Davidovits, held at the Geopolymer …

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Materials | Free Full-Text | Geopolymers: Advanced Materials …

The initial predictions of the importance of geopolymers primarily assumed use mainly in the construction sector. However, as research progresses, it is becoming clear that these versatile materials demonstrate the ability to greatly exceed their original applications, as characterized in detail in this review article. To the best of our …

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Geopolymers : structure, processing, properties and …

Producing fire and heat-resistant geopolymers. Utilisation of mining wastes to produce geopolymer binders. Utilisation of non-thermally activated clays in the production of geopolymers. Thermal properties of geopolymers. Utilisation of low-calcium slags to improve the strength and durability of geopolymers. Part 3 Applications of …

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ReviewGeopolymers as sustainable eco-friendly materials: …

Geopolymers are green inorganic polymers comprising aluminosilicate constituents and are characterized by the semi-crystalline or amorphous form in a three …

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Geopolymer Concrete

Mechanical Properties of Geopolymer Concrete. Compressive strength of geopolymer concrete have been found up to 70 MPa (N/mm 2 ). The concrete gains its compressive strength rapidly and faster than ordinary …

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Geopolymers: Past, Present, and Future of Low Carbon …

The geopolymers are large inorganic molecules, synthesized by an activated polycondensation reaction, either in a highly alkaline medium or in an acid …

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Geopolymers Design, Preparation, and Applications

geopolymers by using thermal and spectroscopic techniques, highlighted their glassy appearance, and how the surface coating changed into a dense geopolymer gel covered with thin needles when fired. The absence of crack formation and a low dehydration rate allowed them to conclude that using RHA in geopolymer formulation can potentially …

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A state-of-the-art review of recent advances in porous …

2. Chemistry of geopolymers2.1. Chemistry of geopolymers and synthesis mechanism. The structure of geopolymers consists of an irregularly ordered alumino-silicate tetrahedral network macromolecule over a large distance, the sialate network formed between SiO 4 and AlO 4 tetrahedron units connected by oxygen atoms, is …

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Geopolymers: Structures, processing, properties and industrial

Geopolymers offer an alternative to Portland cement, boasting high mechanical strength, as well as chemical and thermal durability. It is an inorganic polymer that has environmental advantages in ...

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Geopolymers as an alternative to Portland cement: An …

Geopolymers minimize CO 2 emission and may be a partial alternative to Portland cement in the building industry. The geopolymer technology gives solution to …

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