Fiber composites of inorganic polymers (geopolymers) reinforced with natural fibers

Alzeer, Mohammad I.M.; MacKenzie, Kenneth J.D.

doi:10.1016/b978-0-12-820512-9.00016-2

Cited by 6 publications

(2 citation statements)

References 86 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strengths of all the samples was adequate for biomedical applications, but that of the Ca3(PO4)2 sample was slightly greater, making it the more promising material [36]. This brief summary covers only a small part of the work of the New Zealand geopolymer group over the last 20 years, but more extensive details of our work in several of these research areas can be found in the book chapters [37][38][39][40][41][42][43] and summarised in Figure 2.…”

Section: A Brief Summarymentioning

confidence: 99%

History of Developments in Geopolymer Science in New Zealand: A Brief Review

MacKenzie

2024

Citi Sci

View full text Add to dashboard Cite

This brief review covers some of the highlights of the research into the chemistry and various applications of aluminosilicate geopolymers carried out in the Chemistry Department of Victoria University of Wellington over the last 20 years. Because these materials are generally amorphous to X-rays, the technique of Nuclear Magnetic Resonance with Magic Angle Spinning (MAS NMR) played a unique and important role in these studies. Many potential applications of geopolymers, were investigated over this period, including their use as structural materials, catalysts for commercially important organic reactions, bioactive materials and photoactive materials. Most of the initial work was carried out on clay-based starting materials because of their purity, but more practical materials were also developed, based on the by-products of industrial processing (fly ash, blast furnace slag, red mud, etc) This work led to more than 62 published papers in international journals, some of which are discussed here.

show abstract

Section: A Brief Summarymentioning

confidence: 99%

History of Developments in Geopolymer Science in New Zealand: A Brief Review

MacKenzie

2024

Citi Sci

View full text Add to dashboard Cite

show abstract

“…The TRC is a kind of concrete composite mainly made of a woven fabric embedded as reinforcement in a finely grained cementitious matrix [1,3,6,7]. The fabric ("a manufactured planar textile structure made of fibers and/or yarns assembled by various means such as weaving, knitting, tufting, felting, braiding, or bonding of webs to give the structure sufficient strength and other properties required for its intended use") [1] could be made of different type of materials including carbon, basalt, aramid, polyethylene (PE), polypropylene (PP), poly-vinyl-alcohol (PVA), glass and also cellulose-based natural fiber [4,8,9].…”

Section: Introductionmentioning

confidence: 99%

Alkali-Activated Copper Slag with Carbon Reinforcement: Effects of Metakaolinite, OPC and Surfactants

Lemougna,

Hernandez,

Dilissen

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

Copper slag is an industrial residue with a large unutilized fraction. This study presents the development of alkali-activated composites from a copper slag named Koranel®. The effects of metakaolinite, ordinary Portland cement (OPC) and surfactants were investigated. The reactivity of Koranel with potassium silicate solutions with molar ratio R = SiO2/K2O varying from 1 to 2.75, with 0.25 intervals, was investigated using isothermal calorimetry. The reactivity was relatively low at 20 °C; the reaction started after a few hours with a low silica modulus, to several weeks with the highest silica modulus. The substitution of Koranel by OPC (5 wt.%) or by metakaolinite (10–20 wt.%), both led to higher reaction heat and rate; meanwhile, the addition of 2 wt.% polyethylene glycol/2-methyl 2,4 pentanediol delayed the reaction time in the system containing metakaolinite. Raising the curing temperature from 20 °C to 80 °C shortened the setting time of the low reactive systems, from several days to almost instantaneous, opening perspectives for their application in the production of prepreg composite materials. The use of carbon fabric as reinforcement in the alkali-activated matrix led to composite materials with flexural strength reaching 88 MPa and elastic modulus of about 19 GPa—interesting for engineering applications such as high-strength lightweight panels.

show abstract