...Jiasui Wang; Jin Chai Lee; Surong Luo; Yanran Shen; Xuefang Wang; Wenda Wu The large drying shrinkage of geopolymer seriously hinders its industrial production and application. In this study, mechanochemical processing was introduced into the one-part geopolymer to alleviate its drying shrinkage...

...Hui Lin; Jianhang Hu; Tianze Song; Yue Li Silico-aluminate phosphate ( SAP ) geopolymers are three-dimensional amorphous polymers formed by the reaction of aluminosilicate with phosphate. They exhibit high strength, excellent thermal resistance, and corrosion resistance, making them highly...

...Jiajun Hu; Kequan Yu; Xiaolu Guo The traditional interlayer bonding testing methods used for cement-based materials is not suitable for three-dimensional (3D)-printed geopolymers and they have some drawbacks that prevent efficient and accurate testing; accordingly there is an urgent need for a new...

... in this paper to develop a new low-carbon-dioxide green geopolymer cementitious material that is resistant to sulfate attack. The effect of this geopolymer material on sulfate erosion resistance is investigated in terms of alkali admixture, alkali modulus, water–binder ratio and fly ash admixture. In this paper...

...Oğuzhan Yavuz Bayraktar; Ahmed Salah Jamal; Ali Öz; Jinyan Shi; Burak Bodur; Gökhan Kaplan Lightweight geopolymers (LWGPs) were prepared using fly ash (FA) and pumice aggregate (PA), and their sustainability was enhanced by the addition of recycled waste tire aggregate (WTA). The results show...

...Yi Huang; Xiangdong Qing; Li Lin; Bicai Li; Lin Xu; Yinglin Peng Fly-ash-based geopolymer pastes with the addition of expanded vermiculite (EV) powder were synthesised and their microstructure, compressive strength, setting time, moisture control, extent of efflorescence and thermal conductivity...

...Yongming Tu; Tongfang Wang; Rongjia Wen; Jie Cao; Mengxiang Fang; Chao Wang; Gabriel Sas; Lennart Elfgren The construction of nuclear power plants necessitates careful consideration of the discharge and fixation of nuclear waste. Geopolymers are new cement-based materials (CBMs) with three...

...Viengsai Phavongkham; Suthee Wattanasiriwech; Darunee Wattanasiriwech Geopolymers prepared with class C fly ash (FA) often suffer from a flash geopolymerisation rate, making it difficult to work. Class F FA, however, may have low reactivity, so an admixture must be added to solve this problem...

...Qifeng Lyu; Anguo Chen; Pengfei Dai Preventing the corrosion of cementitious materials in acidic environments is crucial for the safety and durability of infrastructure. The corrosion of specimens of ordinary Portland cement (OPC) and metakaolin-based geopolymer (MKG) in 1 mol/l nitric acid...

... method (SMM) and conventional mixing method (CMM)) on the properties of a geopolymer made from LRFA blended with calcined kaolinite clay as a precursor. A mixture of sodium hydroxide and sodium metasilicate was used as the alkaline solution. It was found that the SMM was required to obtain LRFA...

...Yuanda Wang; Xuefang Wang; Ying Lou; Feng Gao; Wenda Wu One-part geopolymers are a greener alternative to Portland cement and are more suitable in engineering applications compared with two-part geopolymers. The effects of mechanical activation on the properties and the mechanism of the pozzolanic...

... of the AAGIB polycondensation reaction increased to 76.2 kJ/mol when F_SO > 5%. 24 07 2021 06 10 2021 ICE Publishing: All rights reserved 2021 geopolymers temperature waste With increasing carbon dioxide emissions worldwide, research on low carbon...

...Márlon A. Longhi; Erich D. Rodríguez; Susan A. Bernal; John L. Provis; Ana Paula Kirchheim This paper assesses the use and valorisation of two industrial wastes generated at a large scale, which are currently disposed in landfills, as raw materials to produce geopolymers. Specifically, a kaolinitic...

... absorption and compressive strength of synthesised fly ash-based geopolymers. Geopolymer pastes were prepared using fly ash mixed with an alkaline activator consisting of sodium hydroxide solution and sodium silicate solution. The phase composition, microstructure and chemical bonding of the synthesised...

...Linping Wu; Guangping Huang; Wei Victor Liu The aim of this study was to improve the acid resistance of a metakaolin-based geopolymer (MKG) by substituting metakaolin with calcium aluminate cement (CAC). The CAC was added at weight ratios of 5% and 10%. The raw materials were activated...

...Jun Xu; Huajun Zhu; Guangwei Liang; Munan Zhai; Qisheng Wu Metakaolin-based geopolymers (MKGs) containing different contents of MS expansive agents (EAs) were prepared by alkali activation. Different mechanical testing methods for differently shaped samples were used to evaluate the bond properties...

...Jian Zhang; Shucai Li; Zhaofeng Li; Yifan Gao; Chao Liu; Yanhai Qi Red mud (RM) can be used in large quantities in geopolymer technology to reduce the usage of ordinary Portland cement products. The effect of varying the particle size of RM on the potential reactivity of geopolymers...

...Ikmal Hakem Aziz; Mohd Mustafa Al Bakri Abdullah; Cheng-Yong Heah; Yun-Ming Liew In this paper, the thermal performance of ground-granulated blast furnace slag (GGBFS) geopolymers is investigated. The geopolymers were prepared with sodium-based alkali activator and exposed to elevated temperature...

...Changsen Zhang; Baogui Zhu; Qisheng Wu; Yang Li; Zhenzhe Feng; Yu Wang; Zhichao Hu Geopolymer pastes based on nickel slag/metakaolin (NS/MK) were prepared and their physical properties and microstructure as a function of NS content were studied. The results showed that the addition of NS...

...Napoleana Anna Chaliasou; Andrew Heath; Kevin Paine; Juliana Calabria Holley Despite extensive research into sustainability of geopolymers, end-of-life aspects have been largely overlooked. A recycling scenario is examined in this study. This requires an investigation of alkali leaching potential...