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The technology of preparing of fiber-reinforced concrete mix with carbon fibers is developed. The superplasticizer is based on ether carboxylates as a separator for carbon fibers. The technology allows increasing of concrete compressive strength up to 43.4% and tensile strength up to 17.5% as well as improving stability of mechanical …
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56th, 90th and 120th days. In addition, in order to monitor the acid resistance, the strength changes of the samples exposed to 5% sulfuric acid and 5% nitric acid solution after 28 days of standard curing were followed until the 120th day. Results show that, SF and FA additives increase the compressive strength especially at older ages.
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One approach is to use novel materials as additives that can both increase strength to concrete while reducing carbons associated with traditional processes. According to McKinsey's analysis, "admixtures have the potential to reduce CO2 emissions in concrete by up to 30 per cent under current standards and up to 50 per cent under …
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Download scientific diagram | Additives' impact the concrete compressive strength using 350 kg of cement (a) SP62, (b) PC 180, and (c) RC 897. from publication: Modeling the Impact of Liquid ...
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One approach is to use novel materials as additives that can both increase strength to concrete while reducing carbons associated with traditional processes. …
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Reading time: 16 minutes. Concrete admixtures (additives) enhances the properties of concrete for applications in construction with special requirements. Concrete additives are used to achieve desired …
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The compressive strength of concrete can be increased by: Including admixtures. Adjusting the cement type and quantity. Reducing the water/cement ratio. Utilizing supplementary cementitious materials …
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In this study we made high strength concrete using ash derived from waste paper. Paper ash was burned manually and then filtered using sieve number 150. Paper ash was then tested for its chemical ...
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This paper aims to investigate, from pore structural and cement paste microstructural points of view, the strength of ed concretes having the same air void contents, for a given density, but different matrices produced by using different additives (individually and in combination). This will be achieved by:
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Akona Concrete Bonding Additive is an acrylic cement modifier that dramatically improves strength, adhesion, abrasion resistance and freeze-thaw resistance and is ideally suited for use with sand, mortar, cement mixes …
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Improving Concrete Strength through Additives. Using additives is essential, for boosting the strength of concrete a factor in determining its ability to bear …
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The optimal strength result from artificial neural networks with genetic algorithm optimization is 85.1 MPa, which is higher than the best experiment result of 76.8 MPa.
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Superplasticizers are additives that improve the flowability of concrete without compromising its strength. These additives act as water reducers, allowing for a higher …
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Concrete early strength admixture is one of the earliest admixtures used in the history of admixture development. So far, people have developed a variety of early-strength additives other than chloride and sulfate, such …
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As the acquired results of this investigation showed, utilizing additives in concrete leave a considerable influence on the strength of concrete, particularly in the case of confirmation of the ...
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This paper presents an experimental study on the effect of natural pozzolanic additives on the strength and durability of concrete immersed in seawater. Concrete specimens using various natural pozzolan contents from 0 to 30% were cured in normal water and then immersed in seawater for 12 months. Sulfate-resisting cement …
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In modern cement and concrete technology, addition of active mineral additives (fly ash, silica fume, slag, natural pozzolan, etc.) is of great scientific significance [1].It is well known that the clinker minerals C 3 S and C 2 S that take about 75% of the portland cement will form high basic calcium hydrosilicates (c/s > 1.5) with a lime/silica …
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Concrete admixtures are natural or manufactured chemicals or additives added during concrete mixing to enhance specific properties of the fresh or hardened concrete, such as workability, durability, or early and final strength. ... whether it is a high-strength mix or a unique color or finish texture you want to specify. In addition to our ...
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Concrete admixtures are natural or manufactured chemicals or additives added during concrete mixing to enhance specific properties of the fresh or hardened concrete, such …
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The obtained exponential equations show that concrete compressive, flexural and splitting tensile strengths decrease with increasing crumbed rubber additive amount. The testing has also shown that ...
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One of the primary reasons to use quality concrete additives is to get strength for the construction work. The concrete admixture is mixed with cement and water mixture and used in small quantities. This helps boost the quality and durability of concrete mixture and affects its behavior and control setting or makes it hard. Therefore, the ...
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Depending on the type of project, there are five different admixtures that can be used in concrete to increase strength. 1. Pozzolanic Admixtures. When mixed with …
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The study compares the durability of Natural Zeolite with Metakaolin, Silica Fume, and Fly Ash on high-strength concrete. 300 concrete specimens were tested for compressive strength before and after an acid attack, modulus of elasticity, water absorption, and rapid chloride permeability. 5%, 10%, and 15% of the cement were …
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Highlights An ANN study was carried out to predict the core compressive strength of SCC mixtures with mineral additives. One conventional concrete and 6 different SCC mixtures with mineral additives were prepared. ANN model predicts the compressive strength of concrete with R2 of 0.95. ANN can be an alternative approach …
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Whereas specimens with a mixture of 15%, 20%, and 25% produce concrete with compressive strength below 36 MPa. From the results of the study it can be concluded that the use of 5% and 10% waste paper ash can increase the compressive strength of concrete. Ash from paper waste can be an alternative material added to the concrete …
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The addition of 0.1% of glass fibres into the concrete can develop the improved mechanical and durability properties at 28 days [61]. R. Gowri and Angeline Mary (2013) investigated at 28 days the ...
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Depending on the type of project, there are five different admixtures that can be used in concrete to increase strength. 1. Pozzolanic Admixtures. When mixed with cement, Pozzolanic admixtures react with calcium hydroxide to form additional compounds that fill in the gaps between cement particles, resulting in denser and more durable …
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Pozzolans: Pozzolans are materials that are added to the cement mix to improve its strength and durability. They react with the calcium hydroxide produced during the hydration process to form compounds that contribute to the strength of the final product. The use of additives in cement mixes is a critical process that must be carefully ...
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Using waste materials as supplementary cementitious materials can significantly improve the 3D-printed concrete's rheology, but the excessive use can decrease the early strength. Lastly, using recycled sand in 3D can reduce the flexural stiffness and strength of the printed objects when loaded from different directions.
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Fig -2: compression testing machine, flexural strength testing machine and split tensile strength testing machine 6. RESULT ANALYSIS AND DISCUSSIONS Compressive strength, split tensile strength and flexural strength test were conducted at the end of 28 days on concrete specimens. The result shows that there is a gradual
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