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Dear Colleagues,

In recent decades, higher performance and increased sustainability are the two major research trends in concrete technology. On the one hand, concrete materials for modern construction are expected to possess better mechanical behaviour, using either advanced binder technology or high-performance fibre reinforcement. On the other hand, tremendous interest has been attracted to greener concrete materials in order to reduce carbon emissions and mitigate the consumption of natural resources. Among the available achievements, geopolymers can typically be regarded as a green cementless binder, sourced from industrial/agricultural/urban wastes/by-products. The development of both high-performance and green geopolymer/cement concrete composites can be solid foundations to support modern urbanization and civilization.

This Special Issue aims to present the recent advances and new achievements on green or high-performance geopolymer/cement concrete composites for sustainable and resilient infrastructure. We welcome high-quality original research papers and state-of-the-art reviews dealing with, but not limited to, the following topics:

Geopolymer (alkali-activated) concrete and composites;
Cementitious composites;
High-performance geopolymer/cement composites;
Fibre-reinforced geopolymer/cement composites;
Nanotechnology in geopolymer/cement composites;
3D printed geopolymer/cement concrete;
Fibre-reinforced polymers in construction;
Other low-carbon binder materials.

Dr. Lingyu Xu
Dr. Bo-Tao Huang
Dr. Yu Xiang
Dr. Mehran Khan
Dr. Xing Yin
Guest Editors

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Keywords

cement
geopolymer
concrete
fibre-reinforced concrete
fibre-reinforced cementitious composites
fibre-reinforced geopolymer composites
high-performance concrete
fibre-reinforced polymers
artificial geopolymer aggregate
alkali-activated materials
low-carbon cementitious composites

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Research

15 pages, 3201 KiB

Open AccessArticle

Damage Evolution of Polypropylene–Basalt Hybrid Fiber Ceramsite Concrete under Chloride Erosion and Dry–Wet Cycle

by Hongbing Zhu, Siyu Wen, Xiu Li, Yahan Li and Zhenghao Fu

Polymers 2023, 15(20), 4179; https://doi.org/10.3390/polym15204179 - 21 Oct 2023

Cited by 3 | Viewed by 712

Abstract

To investigate the influence of polypropylene–basalt hybrid fibers (PBHFCC) on the durability of ceramsite concrete, this study determined the appearance change, mass loss rate, relative dynamic elastic modulus, compressive strength and splitting tensile strength of ceramsite concrete with four kinds of hybrid fibers volume admixture under chloride erosion and dry–wet cycles. The results reveal that under this effect, the apparent damage of each group of specimens increased with the growth of the erosion time. The quality, compressive strength and splitting tensile strength of the specimens all increased gradually during the erosion age period of the first 72 d and gradually decreased after 72 d. The relative dynamic elastic modulus was similarly mutated in 48 d. When the hybrid fiber content of the specimens is 0.15 vol %, the enhancement effect of ceramsite concrete is better than that of the other three amounts. The relative dynamic elastic modulus value is used as a damage variable to establish the damage equation, and the damage evolution equation of PBHFCC considering the volume of hybrid fiber under chloride erosion and dry–wet cycle is derived. The conclusions can be used as a reference for the durability design and construction of PBHFCC. Full article

(This article belongs to the Special Issue Advances in Geopolymer and Cement Concrete Composites)

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