In the present scenario, there is a huge requirement of quality concrete for paver applications. The production of green and sustainable concrete has become a must to substitute the ordinary Portland cement (OPC) concrete. It is an eminent fact that the manufacture of OPC requires the burning of its raw materials which lead to a huge …
Specifically, asphalt concrete mixes (AC) use bitumen as a binder . The aggregates act as the structural skeleton of the pavements, whereas the hydrocarbon ligand homogeneously covers all the materials. ... The BOF slag used as a second type of coarse aggregate in this research was provided by a Spanish steel production company. …
The use of FCS as a coarse aggregate in concrete increases the electrical resistivity substantially compared to the concrete with conventional coarse aggregate [60]. Elibol and Sengul [60] showed that concrete with FCS coarse aggregate achieved an improvement in electrical resistivity of more than 25% compared to the reference …
It discusses the production of slag cement, its chemical and physical properties compared to portland cement, benefits of using slag cement such as improved workability, strength, and durability. It provides examples of projects that have used slag cement concrete mixtures with replacement rates ranging from 20-50% and achieved …
The document presents the results of a study on using copper slag as a replacement for fine aggregates in concrete. Various concrete mixes were prepared with 0- replacement of fine aggregates with copper slag. The results showed that flexural strength increased up to 40% replacement of copper slag, and it is recommended that …
This paper presents the results of a research dealing with the use of unstable steel slag as a substitute for natural aggregate in the production of concrete. Portland cement CEM I 42.5N and ...
Conclusion Blast Furnace Slag concrete mix having various cement replacement level up to 30% Exhibited satisfactory results for compressive strength. The optimum use of slag in the concrete is observed to be 30% of cement. Slag concrete with 30% cement replacement shows 19% higher compressive strength than OPC mortar …
Various researchers are developing efforts to integrate waste and by-products as alternative materials in road construction and maintenance, reducing environmental impacts and promoting a circular economy. Among the alternative materials that several authors have studied regarding their use as partial or total substitutes for …
5. USES OF SLAG Many commercial uses, so it is rarely thrown away Is often "re-mined" by outside companies to extract any valuable materials (often metal) still contained in the waste Has been …
Presentation Transcript. BLAST FURNACE SLAG. During the extraction of liquid raw iron by reducing the iron ore in the furnace, "high furnace slag" is formed when the slag-forming elements are oxidized and collected on hot mine. • Iron ore, limestone and Coke are used as raw materials in iron production.
One SCM used is copper slag (CS). In this study, a life cycle assessment (LCA) is conducted by investigating the environmental impacts of concrete replacing different percentage of cement with CS.
Cement, one of the main components of concrete, poses environmental risks, accounting for 7% of total global carbon emissions. To alleviate the environmental hazards related to cement manufacturing, supplementary cementitious materials (SCM) are employed to reduce the usage of cement in concrete. One SCM used is copper slag …
Slag in Concrete. Definition: granulated blast-furnace slag that has been finely ground and that is hydraulic cement.- ACI Concrete Terminology. The use of slag …
Slag cement comes from ground granulated blast furnace slag (GGBFS). The substance is a by-product of steel manufacturing. Companies can chill the granules and grind them into a fine powder. …
Every year, a large amount of solid waste such as fly ash and slag is generated worldwide. If these solid wastes are used in concrete mixes to make concrete, it can effectively save resources and …
AI-enhanced description. GLA University Follow. Self-compacting concrete (SCC) was developed in Japan in the 1980s to solve issues with inadequate concrete compaction. SCC is highly flowable under its own weight and fills formwork without vibration. It was pioneered by Professor Hajime Okamura and has seen increasing use …
another crushing operation. Alternatively, a blend of 20 mm down crushed ACBFS. (80%) and 20% GBFS can used for base course. construction. An activator such as lime (1–3%) or lime/fly ash (1–3 ...
Physical properties. Copper slag grains have a color of black glassy type and a fineness modulus of 3.5. The hardness is about 7 Moh's scale. Other typical physical properties are given in Table 2.In order to use copper slag as a mineral admixture, it was necessary to carry out an experimental study associating grinding time, average …
Figure 5 Compressive strength of concrete with different percentage of copper slag with normal concrete. V. CONCLUSION Copper slag can be used as an alternative to natural sand in concrete. When Copper slag is replaced with equivalent weight because of the fact more mortar is there to surround the aggregate therefore may
Fly ash is a by-product from the combustion of pulverized coal, and is widely used as an ingredient in hydraulic-cement concrete. Because it improves many desirable properties of concrete, it is introduced either as a separately batched material or as a component of blended cement. Fly ash reacts with the hydrating hydraulic cement to …
Experimental studies were performed on the use of non-ground-granulated blast-furnace slag as an aggregate in concrete. Using industrial by-products can help reduce greenhouse gas emission, and can be more economical than normal Portland cement concrete. While grinding the slag puts an additional burden of cost into …
Title: Relation between Porosity and Compressive Strength of Slag Concrete 1 Relation between Porosity and Compressive Strength of Slag Concrete An-Shun Cheng, Tsong Yen, Yu-Wen Liu, Yeong-Nain Sheen An-Shun Cheng is a Ph.D. candidate of Civil Engineering at National Chung-Hsing University. carat_at_ms47.url.tw Tsong Yen is …
AIR CONTENT • The air content is in between 4.2% and 4.5% in concrete in which natural sand is replaced by three percentages (10%, 20%, 30%) of used foundry sand. • In fresh concrete, the air content of class F fly ash concrete is lower than that of normal weight concrete.
Green concrete. 2. WHAT IS CONCRETE Concrete is the mixture of cement, sand, water and course aggregates which can be poured into formwork and form a hard structure like a stone. 3. 1.Reinforced cement concrete (R.C.C.) 2.Plain cement concrete 3.Ready-mix concrete 4.Light weight concrete 5.Fiber reinforced concrete 6.
The maximum size of coarse aggregate is typically 19 mm or 25 mm (3/4 in. or 1 in.). An intermediate-sized aggregate, around 9.5 mm (3/8 in.), is sometimes added to improve the overall aggregate gradation. Since aggregates make up about 60% to 75% of the total volume of concrete, their selection is important.
concrete with fly ash and slag cements Zbigniew Giergiczny. V International Conference ... in the production of cement and concrete ; Used in the production of cement and concrete ... Many of them are also animated. And they're ready for you to use in your PowerPoint presentations the moment you need them. – PowerPoint PPT presentation.
Coarse aggregate was then replaced with CS in 10 (M2), 15 (M3), 20 (M4) percentages to study effect of CS replacement. Free water to cementious ratio was maintained constant at 0.6 for all concrete mixes. Extra water was added in the mixes depending on the CS replacement to compensate water absorption of the CS particles.
24. Concrete is a composite material and highly versatile construction material, well suited for many structural applications. It is a mixture of Portland cement, water, aggregates, and in some cases, admixtures. Strength, durability, and many other factors depend on the relative amounts and properties of the individual components. …
Studies have shown that the addition of slag to concrete mix improves both mechanical and durability properties of both fresh and hardened concrete, mainly, recycled aggregate concrete (RAC) ( Al-Jabri et al., 2009, Awoyera and Adesina, 2019 ). The use of slag in construction works started a long time ago.
Microsoft PowerPoint - Hooton PLC Slag ACI talk March 2021.PPT [Compatibility Mode] Performance of Slag Cement with Portland‐limestone Cement in Concrete . Reducing …