... characteristics of CA increase the surface friction between the cement paste, SS and CA, adversely impacting the workability of SSCAC . For mitigation, it is essential to optimise the rheology of SSCAC . This can be accomplished by partially substituting cement with fly ash ( FA ), limestone powder ( LS...

...Qingxu Ma; Deqiang Zhao; Dongbing Jiang; Zhengyu Yu; Hui Yang; Piqi Zhao The incorporation of fly ash ( FA ) as an admixture to partially replace cement clinker can improve the strength of cement pastes. However, the addition of FA leads to weak early-age mechanical strength. Graphene oxide ( GO...

...Juntao Zhang; Yingchun Yang; Xinyue Li; Chengshun Chi; Yingchun Yang Solid waste fly ash modified by alkali activation was used as a raw material to prepare calcium silicate hydrate (C-S-H) seeds as early-strength agents using a mechanochemical method. The C-S-H seeds, both before and after...

...Zhiwei Wen; Guanghua Rao; Li Wan; Song Wang; Kun Lai; Guang Yang; FanRong Ai Fly ash (FA) is a silicate solid waste produced by coal-fired power plants, which encroaches on land and pollutes the soil. Aluminosilicate can be hydrated using alkali activators to form a high-strength geopolymer. Using...

... reserved 2025 acid attack aggregates capillary suction test electrical resistivity fly ash recycled aggregate UN SDG 12: responsible consumption and production Concrete is a highly used construction material worldwide, and Portland cement (PC) is the main ingredient used in concrete...

...Andaç Batur Çolak; Fatih Çelik; Oğuzhan Yıldız; Samet Mufit Bozkır The effects of nanoalumina (n-Al₂O₃) additions at various proportions by mass (0.0, 0.3, 0.6, 0.9, 1.2 and 1.5%) on plastic viscosity and yield stress values of cement-based grout replacement with fly ash...

... investigated. Concrete mixtures were designed to have a water-to-binder ratio of 0.60. A fly ash-to-binder ratio of 0.20 and calcined kaolinite clay-to-binder ratios of 0.10 and 0.20 were studied. The chloride penetration resistance and electrical resistivity of the concrete were assessed and mercury intrusion...

...Kemal Karakuzu; Veysel Kobya; Ali Mardani; Burak Felekoğlu; Kambiz Ramyar The compatibility of polycarboxylate-based water-reducing admixtures (PCEs) having different carboxylate, phosphate and sulfonate anionic groups with paste and mortar mixtures containing fly ash (FA) was investigated...

... cementitious composites (ECCs). The study investigates the impact of CAC, both with and without the presence of fly ash (FA), on the mechanical, physical, durability and microstructural properties of ECC–CAC mixtures. Various proportions of FA to CAC up to 1.5 were considered, while assessing different...

...M. Kemal Ardoğa; İ. Özgür Yaman; Mustafa Tokyay In this research, after producing reactive magnesia (RM) directly from the calcination of magnesite, reactive magnesia cement (RMC) specimens with fly ash were prepared and cured in two different environments to investigate their long-term mechanical...

...K. Chiranjeevi Reddy; Kolluru V. L. Subramaniam Formulating alkali-activated binders requires a clear understanding of the role of activator concentration and source material composition on product formation and strength gain. Alkali activation of a low-calcium fly ash (FA) binder with slag...

.... However, OPG often suffers from a low degree of reaction, a high number of crystalline by-products and, as a result, low strength. Here, one-part geopolymer was assisted by mechanochemical activation (MC-OPG) to produce grout. The precursor materials (slag and fly ash) and sodium silicate were...

... (SCMs) influences the properties of cement-based materials. To study the synergistic effect quantitatively, the hydration heat, hydration products and porosity of cement pastes with different binders were investigated. Test results showed that the synergistic effect between LP and fly ash (FA) or slag...

...Anurat Poowancum; Prasert Aengchuan Low-reactivity fly ash (LRFA), obtained from combustion in a low-temperature furnace, is a hazardous waste with low pozzolanic activity that is unsuitable for engineering applications. This study investigated the effects of mixing procedure (sequence mixing...

... reaction of fly ash (FA)/slag-based geopolymer paste prepared using the one-part method were studied. Simple mixing was used for the control group and the effect of mechanical activation on the macroscopic properties of geopolymers was studied using tests for compressive strength, fluidity and setting...

...Gangapatnam V. P. Bhagath Singh; Challapalli Subrahmanyam; Kolluru V. L. Subramaniam An experimental investigation on the dissolution of low-calcium fly ashes in an alkaline solution is presented. Fly ashes collected directly from different sources are used in the study. Changes in the elemental...

...Amarpreet Kaur; Shashank Bishnoi; Bishwajit Bhattacharjee Fly ash is the most widely used supplementary cementitious material in the world. In India, although the widespread use of fly ash started only two decades ago, fly ash cement already makes up almost 70% of the market and still more fly ash...