The effects of modified fly ash (MFA) on the replacement rate of cement, the quality and replacement rate of recycled fine aggregates (RFA), the mechanical properties of concrete, such as ...
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The study conducted by Siddique et al. suggested replacement of natural sand by fly ash up to 40% [4]. If the natural sand is completely replaced by fly ash a large reduction in compressive strength (73.1%) and workability (13.4%) was reported bya Turhan Bilin et al. [7]. Thus, to utilize the large volumes of fly ash and to reduce the use …
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Bottom Ash (BS) and Fly Ash (FS) 50 & 50: Reduced density due to pores, create a vent for fluid permeation, also decreased due to low density of fly ash and bottom ash. [11] EP and Pumice: 25, 50, 75, &100: Good low density in light weight concrete and also expanded perlite is 0.7 times not heavy than natural sand.
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In the compressive strength test at 28 days of concrete, the highest value was obtained with a value of 2.573 N / mm2 resulting from 30% variation of ed and 5% substitution of fly ash for ...
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This study was aimed to determine the effect of LFA (Lakhra Fly Ash) as partial replacement of cement in concrete. To conduct this study, a total of 72 standard concrete cylinders were cast with 1 ...
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It was found that adding of 10% fly ash as sand replacement content resulted in better compressive strength of OPS LWAC, which is higher than the control mix. OPS at the palm oil mill. Figure 2.
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This study examines the effects of adding fly ash (sand replacement) and polypropylene fibers to concrete with design densities of 1,000 and 1,500 kg/m 3 on fresh state features (stability and consistency), mechanical properties, and energy absorption capacities. The consistency of concrete increases with the addition of …
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Replacement of sand 40% by fly ash affects the adverse effect on ER, UPV, and compressiv e strength compared to concrete along with glass f iber (F 0-0 ).
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Alternative fine aggregate, such as replacing river sand with copper slag, bottom ash, used-foundry sand, granite powder waste, dune sand, etc. [6] [7] [8][9][10]. The workability and strength of ...
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Replacement of 50% sand with fly ash can save about 0.4 m3 sand. Comparison of cost per N/mm2 compressive strength has …
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This prompts extensive riverbed mining, which poses severe environmental consequences. This research aims to replace the natural river sand with …
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The results proved that up to 40% replacement of sand by the quarry dust induced higher compressive strength and the workability of concrete decreases as replacement increases. ... "Effect on Compressive Strength with Partial Replacement of Fly Ash", International Journal of Emerging Technologies, ISSN 2249-3255, Volume 6, Issue 1, 2015, pp ...
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Abstract. The utilization of fly ash as sand partial replacement in concrete mix is an alternative solution for the depletion of sand resources in the Special Region …
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Seven-, 28-, and 91-day compressive strength test results of reference mix and fly ash-based mixes containing CS and CBA as natural sand with fly ash as cement replacement varies from 0 to 30% are presented in Fig. 8. The compressive strength of reference concrete after 7 days of curing was 51.84% of its strength after 28 days of curing.
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Figure 3-1: Fly ash improves workability for pavement concrete. Decreased water demand. The replacement of cement by fly ash reduces the water demand for a given slump. When fly ash is used at about 20 percent of the total cementitious, water demand is reduced by approximately 10 percent. Higher fly ash contents will yield …
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The fly ash was used as a partial replacement of cement based on our previous study that showed the susceptibility of the FNS aggregate to alkali-silica reaction (ASR) (Saha and Sarker, 2016). A 30% cement replacement by class F fly ash was shown to successfully mitigate the deleterious expansion due to ASR of the FNS.
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The strength of cement substituted mortar decreases with the increase in fly ash amount, whereas the strength increases when the fly ash is blended as sand substitute. A mortar with highest strength (compressive strength = 30.2 Mpa; flexural strength = 7.0 Mpa) was obtained when the sand replacement ratio was 0.75%. The k …
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Abstract: The abandonment of coal energy plants in the near future will result in a substantially. reduced availability of the coal fly ash broadly used as an e ffi cient supplementary material ...
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Fly ash is generally used as replacement of cement, as an admixture in concrete, and in manufacturing of cement. Concrete containing fly ash as partial to complete replacement of fine aggregate will improve its strength on longterm basis. In this investigation fly ash is used as sand replacement material. The material mix of proportion 1:1.58:3.2:0.48. …
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Abstract. This study investigates the influence of fly ash as a partial replacing sand material on the sulfate resistance of mortar. Fly ash replacement are …
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The inference of the work is concluded that Fly ash, GGBS with GP as partial replacement to M Sand shall be used for construction application where the early gain of strength is recommended. Nevertheless, more studies have to be carried out for further conclusions in applications related to mixing at site, transportation and placement …
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Fly ash can be utilised as a cement replacement, reducing cement usage, thus environmentally and economically beneficial. • Fly ash makes concrete workable; increasing its levels may reduce water …
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The utilization of fly ash as sand partial replacement in concrete mix is an alternative solution for the depletion of sand resources in the Special Region of Yogyakarta. This research evaluates the effect of sand partial replacement with fly ash to the strength-weight and cost-strength ratio of concrete mixes. The strength-weight ratio was ...
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Hundred percentage of replacement of cement with fly ash with alkaline solution is called green concrete also known as Geopolymer concrete [8]. ... Samples were prepared using fly ash, GGBS, M-Sand, Granite powder, sodium hydroxide, sodium Silicate and water. To prepare 10 M concentration to 16 M concentration of the alkaline …
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Key words:: Experimental Study, Partial Replacement, Cement, Fly Ash, Sand, M sand. 1.INTRODUCTION Concrete is the most widely used construction material in civil engineering industry because of its high structural strength, stability, and malleability. Recent technological developments have shown that these materials can be used as
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So, untreated desert sand usually doesn't meet the technical requirements to be used as a pavement subgrade [11]. Desert sand is becoming more popular as a building material because it makes mortar stronger both physically and chemically [12]. Desert sand concrete (DSC) has the same level of strength as regular concrete [13], [14], [15].
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Abstract: In the present study the effects of fly ash as a replacement of sand in a concrete along with addition of glass fibre on physical and mechanical properties of concrete is investigated. Three different density of concrete as 1000kg/m3, 1300kg/m3, and 1600kg/m3 is prepared. The synthetic ing agent is …
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Geopolymerization of fly ash in 10 M NaOH and Na2SiO3: NaOH= 1.8:1 solution at 100°C for one hour produced geopolymer fly ash aggregate (GFAS) to produce an alternative replacement for river sand ...
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Influence of Cement Replacement with Fly Ash and Ground Sand with Different Fineness on Alkali-Silica Reaction of Mortar. ... Although, the replacement of OPC by fly ash can reduce the expansion due to ASR, other factors are still not clear, such as the filler effect and the effects of the fineness of the materials. Therefore, the knowledge ...
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Yuksel and Genc (2007) observed that workability of concrete mixtures containing varying percentage from 10% to 40% of bottom ash as sand replacement, 35 kg/m 3 of fly ash, 350 kg/m 3 of cement and 167 l of mixing water, improved with reference to control concrete. With 50% bottom ash as sand replacement, the workability …
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those with sand replaced partially by granulated blast furnace slag with the results of the fly ash bricks made with zero replacement of Sand. AVAILABLE SIZES OF FLY ASH BRICKS The fly ash bricks are available in different sizes. The following are some of the sizes of fly ash bricks. 230×150×80 mm 230×150×100 mm 230×110×75 mm
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Fly ash [24] can even be used as sand replacement material in cement concretes. This type of fly ash concrete has a lower density and manufacturing cost, a reduced coarse aggregate content, a ...
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Fly ash. Definition. Ash produced in small dark flecks by the burning of powdered coal or other materials and carried into the air. Properties. Fly ash is a pozzolanic material that is used as a replacement of cement.; It also acts as a replacement of sand, when the sand in concrete is replaced by 10% of fly ash the concrete strength …
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Concrete with bottom ash and fly ash added as replacement for sand and cement, respectively. •. Compressive, flexural and tensile strengths of the concrete are …
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This study examines the effects of adding fly ash (sand replacement) and polypropylene fibers to concrete with design densities of 1,000 and 1,500 kg/m3 on fresh state features (stability and ...
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