Long-term durability properties of geopolymer concrete: An in-depth review

A state-of-the-art review on the durability of geopolymer concrete for sustainable structures and infrastructure

Geomorphology in the Tropics: A Study of Weathering and Denudation in Low Latitudes. Michael F. Thomas

Effects of nanosilica and steel fibers on the impact resistance of slag based self-compacting alkali-activated concrete

This study aimed to carry out a scientometric review of rice husk ash (RHA) concrete to assess the various aspects of the literature. Conventional review studies have limitations in terms of their capacity to connect disparate portions of the literature in a comprehensive and accurate manner. Science mapping, co-occurrence, and co-citation are a few of the most difficult phases of advanced research. The sources with the most articles, co-occurrences of keywords, the most prolific authors in terms of publications and citations, and areas actively involved in RHA concrete research are identified during the analysis. The Scopus database was used to extract bibliometric data for 917 publications that were then analyzed using the VOSviewer (version: 1.6.17) application. This study will benefit academics in establishing joint ventures and sharing innovative ideas and strategies because of the statistical and graphical representation of contributing authors and countries.

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Mapping Research Knowledge on Rice Husk Ash Application in Concrete: A Scientometric Review

A scientometric review of geopolymer concrete

Uniaxial compressive strength (UCS) of intact rock is particularly important in rock mechanic studies, especially for those involving civil and mining projects. However, the determination of UCS using direct test is generally expensive, time consuming and almost impossible in preparation of samples for highly weathered sedimentary rocks. In view of this, indirect tests are comparatively cheap, simpler, faster and more convenient to perform either in laboratory or at site. This paper aims to develop an estimation procedure in determining the UCS values of such weak weathered rocks.  Among the indirect tests present herein are point load index, Schmidt Rebound hammer, Brazilian tensile test and slake durability test. Unfortunately, it was found that the accuracy of each single test varies with weathering states. Hence, a recommended procedure using combined indirect tests in determining UCS of weak sedimentary rocks is presented herein.

Estimating Uniaxial Compressive Strength of Tropically Weathered Sedimentary Rock Using Indirect Tests

https://iopscience.iop.org/article/10.1088/1757-899X/513/1/012029/pdf

A comparative of building condition assessment method used in Asia countries: A review

Due to the confinement effects, Steel-Straps Tensioning Technique (SSTT) can significantly enhance the strength and ductility of high-strength concrete (HSC) members (Moghaddam et al. 2008). However, the enhancement especially in strength may result in slender member and more susceptible to instability (Jiang and Teng 2012a). This instability is particularly significant in HSC member as it inherent the brittle nature of the material (Galano et al. 2008). The current slenderness limit expression used in the design is mainly derived from the experiment and analysis results based on Normal strength concrete (NSC) column and therefore the direct application of these slenderness limit expressions to the HSC column is being questioned. Besides, a particular slenderness limit for the SSTT-confined HSC column which incorporated the pre-tensioned force and multilayers effects is not yet available. Hence, an analytical study was carried out in the view of developing a simple equation in order to determine the slenderness limit for HSC column confined with SSTT. Based on the analytical results, it was concluded that the existing slenderness limit expressions used in the design are appropriate for neither HSC columns nor SSTTconfined HSC columns. In this paper, a slenderness limit expression which has incorporated the SSTTconfinement effects is proposed. The proposed expression can also be applied to unconfined HSC columns.

Ma Chau Khun

Papers

A scientometric review of geopolymer concrete

Estimating Uniaxial Compressive Strength of Tropically Weathered Sedimentary Rock Using Indirect Tests

A comparative of building condition assessment method used in Asia countries: A review

Slenderness limit for SSTT-confined HSC column

Behaviour of lightweight foamed concrete with pre-tensioning steel straps confinement