— Quartz powder is a byproduct of quartzite processing To date research on the use of quartz powder in carbonation curing is extremely limited and the carbonation curing mechanism of concrete containing quartz powder is still unclear In this study we focused on the effects of fineness and content of the quartz powder on carbonation curing
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Over the past few years there has been a growing effort to reduce CO 2 emissions in cement production and enhance the mechanical properties of cement based materials Pozzolanic clay has many applications in all fields and is used as an additive in cement Zhang et al 2022 One effective additive that has been widely used for this
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— Limestone powder was also reported to be effective to inhibit AAR [12]; that is the expansion ratios at 14 days and 28 days of mortar are both less than % when more than 45 wt % of limestone
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— The effects of the Blaine fineness of fly ash FA and chemical activators on the hydration and physical properties of high volume fly ash cement pastes were investigated The initial hydration was assessed via isothermal calorimetry and the hydrate composition was determined through X ray diffraction and thermogravimetric analyses
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— The increase was more significant for Q20 S5 samples with more content added than Q10 S5 samples This was resulted from the influence of the quartz powder fineness on the reaction rate [23] This indicated that nucleation was significant and hydration gradually increased as the fineness of the quartz powder increased [24]
— Significant exposure to fly ash possesses a risk to human health and environment • The large use of fly ash in making GPC can reduce the CO 2 emissions and provide NaOH KOH and Na 2 SiO 3 are most used activator in fly ash based Durability of fly ash based GPC is mainly affected by the fineness of fly ash particles
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— The great fineness of The use of quartz powder increased the Ca OH 2 content by K & Chaipanich A Microstructural physical and thermal analyses of Portland cement fly ash calcium
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— The effectiveness of the FA to reduce ASR expansion has been shown to depend significantly on the calcium content [28 29 24] and particle fineness [30][31][32]; where lower calcium and higher
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— Composite cements in which the ordinary Portland cement OPC is partly replaced by limestone powder and/or siliceous fly ash FA at levels up to 35% were studied using three different finenesses for each material The aim was to evaluate the influence of fineness and replacement level on the development of the compressive strength the
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— 1 Introduction With the gradual excavation and exploitation of mineral resources in the world the available resources are decreasing daily Coupled with the fact that ore grades are lower than before the accumulation of iron tailings ITs is serious [1] [2] Therefore it is urgent to find a new treatment method for ITs instead of simply
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— Ordinary Portland cement is a construction material that is widely utilized all over the world Aside from deforestation and fossil fuel combustion the cement manufacturing industry contributes significantly to carbon dioxide emissions which questions the viability of using Portland cement PC in concrete construction Therefore finding an
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— Calcium carbonate binder is well known to reduce the carbon footprint and brings great economic and environmental benefits However the cementitious mechanism is unclear due to raw material
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— The presence of calcium carbonate powder accelerated the hydration of calcium sulfoaluminate belite cement regardless of its fineness The degree of acceleration became larger with increasing fineness of the calcium carbonate powder due to increased surface area of finer CC powder providing more nucleation sites for hydration product to
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