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As concrete mixed with High-loss on ignition (LOI)-based FA, it absorbs more water and necessitates more chemical admixtures, resulting in a strength reduction. For this reason, low …
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Finally, according to the review carried out, it was concluded that fly ashes improve the mechanical and physical characteristics of concrete, and that the optimum dosage is 10% in substitution of ...
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Test results indicate that the concretes made with high-LOI (8%) fly ash can be successfully produced for structural concrete, which contains fly ash of up to 60% of the total...
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Substituting high volumes of cement with fly ash in concrete can provide high quality concrete and a relief in the environment without compromising the quality of concrete. ... susceptible to the effects of weathering and loss of strength and durability [5]. Fly ash reacts with lime to create more calcium-silicate hydrate (CSH) produced during ...
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Test results indicate that the concretes made with high-LOI (8%) fly ash can be successfully produced for structural concrete, which contains fly ash of up to 60% of the total cementitious materials. The high-LOI fly ash …
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*LIU Xue-ying: [email protected] Study on the influence of fly ash and silica fume with different dosage on concrete strength GUO Yin-le 1, LIU Xue-ying1*, and HU Yue-ping2 1Zhejiang University of Water Resources and Electric Power, 310018 Hangzhou, Zhejiang, China 2Zhejiang Huanlong Environmental Technology Co., Ltd, 324400 Quzhou, Zhejiang, China
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Fly ash (FA) has long been the most accepted pozzolanic material for substituting cement in concrete. In typical applications, replacing up to 20 % of the cementitious material mass with fly ash can enhance concrete's physical and mechanical properties [8, 15, 16].Utilizing fly ash, a by-product of industrial processes, has appeared to address sustainability concerns in …
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To save natural resources and protect the environment, the use of fly ash (FA) with a high loss on ignition (LOI) and silica fume (SF) in producing high-strength mortar (HSM) is the objective of this study. ... The quality of raw ingredients has a strong influence on the quality of concrete and mortar. Therefore, the use of a local FA with a ...
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Test results found that the substitution of cement with high LOI FA significantly affected the engineering properties of high-strength mortars. Increasing the high LOI FA …
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Fly ash blended cements in concrete perform better than pure cement in providing better concrete properties. Current specifications limit the use of fly ash in concrete to 30%, although an …
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The utilization of class F fly ash (F-FA) is limited to 15–30% as a substitution for cement. The study intends to tap into the potential of high-volume F-FA as a pozzolan and micro filler by ...
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from the point of ignition. The fly ash at first gives high solidarity to concrete and furthermore lessen the porousness of cement. It was gotten from Thermal force station, dried and utilized. This venture fundamentally manages the replacement of concrete by fly ash taken in fixed extents and examining the influence of fly ash mixed cement.
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Johari et al. [12] found that the porosity of concrete can be decreased using different types of SCM, including metakaolin, GGBF slag, fly ash, and silica fume.
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Using fly ash (FA) to modify magnesium phosphate cement (MPC) not only extends setting time and enhances MPC performance but also reduces costs.
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Moreover, studies have shown that partial replacement of natural aggregates in high-volume fly ash SCC with coal bottom ash and recycled concrete aggregates enhances …
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For each water-to-binder ratio, the fly ash was used to replace 0%, 10%, 20%, and 30% amount of cement. Test results show that the workability of fresh concrete increased, …
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Concrete containing a high volume of fly ash (above 40% cement replacement) has recently been studied for strength and durability [5,[10][11][12][13][14][15] [16] [17]. Siddique (2004) researched ...
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The results indicate that the slump loss of the recycled aggregate concrete with fly ash was reduced to lower than that of the recycled aggregate concrete without fly ash when the fineness of the ...
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Test results exhibited that, both class-F and class-C fly ash significantly improved the resistance to sulfate attack of concrete with 10-17% fly ash replacing cement.
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The mix proportions of HVFA-cement mortars are shown in Table 2.The mix proportions of HVFA-cement mortars were selected based on ISO 679-2009 [], in which a batch of mortar specimens consists of 450 g cement, 1350 g sand, and 225 g water.In particular, the FA contents of HVFA-cement mortar or HVFA concrete is in the range of 30–70%, and the water …
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Abstract. This research addresses a notable gap in understanding the synergistic effects of high carbon wood bottom ash (BA) and silica fly ash (FA) on cement hydration and concrete …
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Over the past two decades, concrete manufacturing has experimented with various supplementary cementitious materials (SCMs) to enhance sustainability, performance, and durability [13] such as fly ash [14], corn cob ash [15], rice husk ash [16], metakaolin [8].These materials consume less than ordinary Portland cement, which is emission-intensive.
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INFLUENCE OF FLY ASH ... 3812-1981 [16]. Properties of both cement and fly ash are given in the Table 1. Well graded river sand finer ... (M1) and it was as high as 41% for 25% fly ash mix (M5 ...
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The re-utilization of fly ash (FA), a primary by-product of thermal power plants, in producing various types of sustainable construction materials has been studied by many researchers. The quality of FA varies depending on either the characteristics of coal or the combustion techniques.
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