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Applied Sciences
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Recent Development and Application in Geopolymers
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Recent Development and Application in Geopolymers

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Earth Sciences".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 1907

Special Issue Editor

Dr. Jing Yang

E-Mail Website
Guest Editor
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
Interests: mineral polymer materials; quartz; kaolinite; potassium feldspar; mineral engineering; mineral chemistry

Special Issue Information

Dear Colleagues,

Geopolymers are amorphous ceramic materials obtained from the alkaline activation of aluminum silicate, and are inorganic polymers. They have been the focus of research for the past few decades. Geopolymers have become a promising alternative to traditional cement-based materials due to their excellent mechanical properties, durability, and environmental sustainability. Compared with ordinary Portland cement-based materials, they help reduce energy consumption, greenhouse gas emissions, and environmental impacts in the production process. The application fields of geological polymers can be divided into two categories, those with conventional physical and mechanical properties, and those for functional and advanced applications.

This Special Issue aims to study the latest progress and applications of geopolymers, providing a platform for researchers to share their latest discoveries and insights, thereby promoting further research and development in the field of geopolymers. We are pleased to invite experts in the field of geopolymers to submit materials for inclusion in this Special Issue.

Dr. Jing Yang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • geopolymer
  • alkali-activated materials
  • sustainable materials
  • physical properties
  • mechanical properties
  • geopolymer applications

Published Papers (2 papers)

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Research

12 pages, 3955 KiB  
Article
Strength Development of Metakaolin-Based Alkali-Activated Cement
by Baowen Lou and Torbjørn Vrålstad
Appl. Sci. 2023, 13(24), 13062; https://doi.org/10.3390/app132413062 - 7 Dec 2023
Viewed by 949
Abstract
Alkali-activated materials, sometimes called geopolymers, can be used as alternative cementitious materials to conventional Portland cement. Currently, there is a significant interest in these materials due to their low CO2 footprint. The typical applications of alkali-activated materials are within civil engineering; however, [...] Read more.
Alkali-activated materials, sometimes called geopolymers, can be used as alternative cementitious materials to conventional Portland cement. Currently, there is a significant interest in these materials due to their low CO2 footprint. The typical applications of alkali-activated materials are within civil engineering; however, potential applications as well cementing material within the oil and gas industry are also receiving emerging interest. This paper presents a systematic study of the compressive strength development from 1 to 28 days for metakaolin-based alkali-activated cement. The results show that the compressive strength is highly dependent upon the initial Si/Al ratio in the mix design, as well as the concentration of the activator solution. Furthermore, due to the relatively low initial reactivity of the metakaolin material used, different types of co-binders were included in the slurry composition to improve early strength development. The two different co-binders tested were another, more reactive metakaolin material and Blast Furnace Slag (GGBFS). It was found that both these co-binders performed as intended, by ensuring early strength development via precipitation of K-A-S-H and C-A-S-H gels, respectively, and also by enabling subsequent strength development due to improved dissolution of the low-reactive metakaolin. Full article
(This article belongs to the Special Issue Recent Development and Application in Geopolymers)
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20 pages, 8770 KiB  
Article
The Effect of Ultrasonic Alternating Loads on Restoration of Permeability of Sedimentary Rocks during Crude Paraffinic Oil Flow
by Evgenii Riabokon, Evgenii Gladkikh, Mikhail Turbakov, Evgenii Kozhevnikov, Mikhail Guzev and Qian Yin
Appl. Sci. 2023, 13(21), 11821; https://doi.org/10.3390/app132111821 - 29 Oct 2023
Cited by 1 | Viewed by 658
Abstract
This paper presents the results of experimental studies on the filtration of reservoir fluid through the rocks under the influence of nonlinear loads. A laboratory rig is assembled that allows for modeling the flow of fluid from the reservoir into the well during [...] Read more.
This paper presents the results of experimental studies on the filtration of reservoir fluid through the rocks under the influence of nonlinear loads. A laboratory rig is assembled that allows for modeling the flow of fluid from the reservoir into the well during the propagation of elastic waves from the well. It is shown that depending on the permeability of the rock matrix as well as on the concentration of paraffins and asphaltenes in crude oil, the effect of the nonlinear load is different. Three types of sandstone are studied: low, medium, and high permeability. The greatest influence of nonlinear loads is observed in high-permeability sandstone. The effect manifests itself in fully unblocking the pore space from paraffins and asphaltenes accumulated in pore throats and restoring the oil permeability to its original value. In the case of medium-permeability sandstone subjected to nonlinear loads, blocking of the pore space is slow. In the case of low-permeability sandstone, the impact of nonlinear loads does not have a significant effect. When studying water filtration in the presence of residual oil saturation, the effect of nonlinear loads is observed as a mobilization of additional oil not previously involved in the filtration process, which also leads to an increase in the water permeability of the rock. Full article
(This article belongs to the Special Issue Recent Development and Application in Geopolymers)
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