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Sustainable Concrete - An Inevitable Need for Present & Future

We need to increase use of classified fly ash by processing fly ash into different categories based on its fineness so that it can contribute effectively in producing very high strength as well as normal strength and durable concrete with lower cement utilization. Recycling of concrete from C&D wastes.

Strength, Economic and Sustainability Characteristics of Coal

The strength of geopolymer concrete using fly ash is studied and effect of replacement on the strength of fly ash– GGBS based geopolymer concrete is discussed along with cost and environmental impact analysis. 4.1. compressive Strength Fly ash based geopolymer concrete attained compressive strength of 68MPa while bottom ash based concrete ...

Study on Sustainable Light Weight Concrete Using Construction

to be used in concrete. Worldwide, more than 50% of GGBS, a byproduct produced from iron smelting is disposed of in landfills. In addition to GGBS, Construction Demolition Waste (CDW) has also been used in the preparation of sintered aggregates. As far as cost concern, construction demolition waste is used as a partial replacement to GGBS.

Utilization of Demolish Brick and Marble Waste in Concrete

Fig. 2 Compressive strength of concrete with varying amount of demolished waste at 7 and 28days (c) Split Tensile Strength Split tensile Strength Test Result Shown in Table Below Table 3 Split tensile Strength Result Sr. No. Replacement in % Split tensile strength in N/mm2 28days Mix I 0 2.43 Mix II 10 2.15 Mix III 20 2.31 Mix IV 30 2.3

Compressive Strength of Concrete by Using Coconut Shell

waste materials like- rubber tyre, e-waste, coconut shell, blast furnace slag, waste plastic, demolished concrete constituents, waste water etc. Construction waste recycle plants are now installed in various countries but they are partly solution to the waste problems.

How to make concrete stronger and more environmentally

Concrete has shaped the modern world. Other than water, it is the most widely used material on the planet so it's unsurprising that scientists are constantly working to make it safer, stronger and ...

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Pavement Quality Concrete (PQC) is that concrete which is used for highway and road construction .Due to high strength, better serviceability and economy. Now a day's engineers are much focused on development of pavement which could be effective

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High Strength Concrete Incorporating Ground Granulated Blast

of High Strength Incorporating Ground Granulated Blast Furnace Slag and Steel Fiber Reinforced Concrete used in construction industry to improve the structural strength and reduce steel reinforcements requirements. Blast furnace slag (GGBS) has been used as a supplementary material along with the cement. It helps in increasing the

Mechanical properties of recycled concrete with demolished

The 28-day compressive strength of the concrete drops by 9.6% or 13% when the NCA is completely replaced with RCA or RBA. For concrete with RCA the strength development continues after the 28 days curing; whereas for concrete with RBA the strength development becomes very slow after the 28 days curing.

Evaluation of Strength of Recycled Coarse Aggregate using

w/c ratio. At lower w/c ratios, the compressive strength of recycled concrete is much lower than that of normal concrete and also higher w/c ratio give similar strength of conventional concrete. III. Year: AprilRECYCLED AGGREGATE CONCRETE, A SUSTAINABLE OPTION FROM DEMOLITION CONCRETE WASTE -A PERCENTAGE REPLACEMENT METHOD A. Author

Concrete: Cement Substitutes - GGBS, PFA and more

GGBS Producing cement uses a great deal of energy, so finding a waste product that can substitute for cement makes good environmental sense. To varying degrees, cement substitutes work in two ways: • First, they hydrate and cure like portland cement. ...


concrete cannot be used. (At maximum cement content, the highest strength class that may be assumed for structural design is C20/25.) The strength of the concrete cannot be specified and the cement content tends to be significantly higher than that for a designed or designated concrete. Do not use this method if a lower-carbon concrete is required.

Influence of GGBS on Mechanical Properties of High

compressive strength for concrete is observed for mixes up to 40% GGBS at all ages. Even for concrete with 50% GGBS, the strength was equal to that of control concrete at 56 days. Figure 3 Compressi ve Strength Vs Age of Concrete Up to 50% replacement, concrete with GGBS generally achieved strengths similar to control concrete till 28 days and after 28 days it exceeded the strength of control concrete.

Blast Furnace Slag:Concrete Benefits

Continued strength gainContinued strength gain ... Recycling of CoarseRecycling of Coarse Screen MaterialScreen Material ... Blast Furnace Slag:Concrete Benefits ...

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Recycling Fine Aggregate from Demolished Hollow Concrete

crushed concrete with aggregate. Recycling of demolition debris was started since the end of 2nd world war, which used crushed brick as aggregates in concrete [20]. Using crushed concrete from demolition waste as aggregate instead of natural resources as well as using demolished concrete pavement to stabilize the road base




Most of waste materials produced by demolished structures disposed off by dumping them as land fill. Dumping of wastes on land is causing shortage of dumping place in urban areas. Therefore, it is necessary to start recycling and re-use of demolition concrete waste to save environment, cost and energy.

Experimental study on reuse of demolished concrete waste

“Crushed concrete waste as coarse aggregate for high-performance concrete”, WIT Transactions on the built environment, Vol 85, @2006. [2] Chavan.R.R and Kulikarni.D.B, “Performance of crushed concrete waste on strength properties as partial replacement of fine

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Shear Strength of Self Compacting Concrete with Demolished

strength of the concrete. Therefore the purpose of this study is to examine the strength of the concrete obtained by the replacement of fine aggregate by the demolished waste concrete and also to find the optimum replacement percentage of the demolished waste concrete. Self-compacting concrete (SCC) is an innovative concrete


High Strength Concrete using Ground Granulated Blast Furnace Slag (GGBS) Thavasumony D, Thanappan Subash, Sheeba D. Abstract — Concrete is a brittle material when it undergoes heavy loads, cracks will form and to reduce this and improve high strength

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“Ground Granulated Blast Slag (GGBS) In Concrete – A Review”

Replacement levels for GGBS vary from 30% to up to 85%. Typically 40 to 50% is used in most instances. For on the ground concrete structures with higher early-age strength requirement, the replacement ratio would usually be 20 to 30%.

Proposal of Environmental Impact Assessment Method for

Nov 02, 2016 · Figure 5 depicts the analysis results of environmental impacts according to the mix ratio of ground granulated blast-furnace slag (GGBS) in the concrete of 24 MPa strength level. GGBS is produced by crushing and mixing blast furnace slag (by-product of iron ore) and natural gypsum, followed by cooling.

Strength and Durability Properties of Alkali Activated Slag

b) geopolymer concrete 78 Figure 4.19 Strength development of blended GGBS-OPC and AAS concrete 81 Figure 4.20 Strength development of FA-based geopolymer concrete 81 Figure 4.21 Rate of absorption vs square root of time for blended concrete 82 Figure 4.22 Rate of absorption vs square root of time for AAS concrete 83

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