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Alternatives to Coarse Aggregate in Cement Concrete - A …

used as aggregates, while recycled concrete and marine aggregates represent a possible, uncommon alternative[3,4]. Looking specifically to aggregates, use of alternative materials must consider the effect on both mechanical properties and

Partial Replacement of Fine Aggregate in Concrete by Tyre ...

One of the solutions suggested was the use of tyre rubber as partial replacement of fine aggregate in cement-based materials. An experimental program was carried out to investigate the compressive strength of concrete with shredded tyres as a fine aggregate in concrete .A number of cubes, prisms, cylinders were casted of M25 grade for this study.

(PDF) Alternate aggregates for concrete

3 . . (a) (b) Figure 1: Particle size distribution of a ggregates used to prepare the concrete specimens: (a) fine aggregates; (b) combined gradations (CA + FA) for nominal size 20 mm. Low weight ...

Alternative processing procedures for recycled aggregates ...

In fact, changes in aggregates properties results in a different matrix at the concrete's meso-level structure, where ordinary concrete is generally considered as a three-phase material,, i.e. natural aggregates, paste and interfacial transition zone (ITZ). On the contrary, in the case of RACs, the situation is quite different, as more than ...

Coconut Shell as a Substitute for Coarse Aggregate in Concrete

The materials used for the concrete are cement, coarse aggregate, fine aggregate, water, admixtures (if any). The use of cement causes the CO₂ emission in environment.

Mechanical Properties of Geopolymer Concrete with ...

The present research is an approach to find possible alternative materials for making geopolymer concrete as an alternative to cement concrete. Alkaline solution of 12 M with sodium silicate to sodium hydroxide ratio 1.25:1 and fly ash to GGBS ratio of 80:20 are considered for making geopolymer concrete based on the referred literature [8, 9].

Alternate Building Materials Used in Construction Works

These alternate building materials can be used when it meets the respective specifications in the code of practice. Here some new materials and technology is discussed as well and a list many alternate materials for foundation, roof and walls are presented with details of each.

Materials | Special Issue : Various Substitute Aggregate ...

Therefore, in order to use substitute aggregate material as a material to replace the existing natural aggregate, there should be no deterioration in the performance of the concrete, and it is necessary to contribute to sustainable concrete development. From this perspective, this Special Issue deals with a variety of alternative aggregate ...

Concrete: Cement Substitutes - GGBS, PFA and more

Very occasionally, it can be found up to a ratio of 90% GGBS and 10% Pc. Concrete made with GGBS cement sets more slowly than concrete made with ordinary Portland cement, depending on the amount of GGBS in the cement mix, but also continues to gain strength over a longer period leading to improved overall durability and life expectancy.

(PDF) RECYCLED CONCRETE AGGREGATE (RCA) FOR THE USE IN ...

Table. 3 Overall Summary (Based on some research) Aspects Recycled Concrete Natural Concrete Aggregate Aggregate Crushing Value 33 % higher Normal Soundness loss 28,1 %-49 % 9,1 --2,6 % Water Ansorption 0,3%-0,32% 0,29 %-0,3% [Tusher] Compression 20 % lower than - Strength NAC 0,05-0,1 lower 13 | A d v a n c e C o n c r e t e M a t e r i a l s ...

Concrete blocks and green alternatives

Thanks to their versatility, concrete blocks have been a feature of UK building sites for nearly a century. Though still almost ubiquitous, a combination of demanding thermal standards, the association of cement production with global warming and the damage caused by the extraction of aggregates has prompted new thinking.

End of life recycling

The chloride content of recycled aggregates is of concern if the material will be used in reinforced concrete. The alkali content and type of aggregate in the system is probably unknown, and therefore if mixed with unsuitable materials, a risk of alkali-silica reaction is possible. Material Efficiency This is Concrete magazine

Is there any alternative for course aggregate in concrete ...

But, there are quite a few alternatives for crushed stone aggregates like building demolish waste, crushed gravel, shreds of discarded vehicle tyres. Use of all/any ot these mainly depends on the ...

Recycled Concrete Aggregate as Alternative Pavement ...

Recycled concrete aggregate (RCA) is one of the alternatives to material that has engendered interest in recent years, especially as an alternative aggregate. There are limited available studies assessing the suitability of RCA as a base or subbase material in pavements.

Aggregates for Concrete - Memphis

Aggregates for Concrete bination of gravels or crushed stone with particles predominantly larger than 5 mm (0.2 in.) and generally between 9.5 mm and 37.5 mm (3⁄ 8 in. and 11⁄ 2 in.). Some natural aggregate deposits, called pit-run gravel, consist of gravel and sand that can be readily used in concrete after minimal processing. Natural ...

Aggregate in Concrete - Concrete Network

Quality Counts. Make sure that your concrete producer purchases good-quality aggregate as verified by regular aggregate test results in compliance with ASTM C 33, "Standard Specifications for Concrete Aggregates." A history of good performance of a local aggregate also provides an indication of how well the material performs in service.

(PDF) IRJET- Concrete with Alternative Aggregates -Green ...

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 08 | Aug 2019 p-ISSN: 2395-0072 Concrete with Alternative Aggregates - Green Concrete Manoj Katiyar1, Surendra Pal Singh2(Asst.Prof.) 1,2Department of Civil Engineering, RCE Roorkee UK India -----***----- Abstract - Concrete is the most largely consumed construction material ...

Exploring The Synthetic Aggregates Alternative | Agg-Net

Although relatively new, synthetic aggregates hold the potential to become a true competitor in certain applications. By Tom Kuennen, contributing editor. Synthetic aggregates — also known as lightweight aggregates — are quickly becoming known as 'heavy hitters' to those material specifiers looking for an alternative to natural aggregates.

What material can I use as a replacement of coarse ...

Answer (1 of 6): It is advisable to not replace gravels with other consituents as possible as you can. Ofcourse coarse aggregates can be replaced with broken concrete debris however we are compromising the quality of resultant concrete upto some level that …

USE OF WASTE PLASTIC AS FINE AGGREGATE SUBSTITUTE IN …

plastic materials along with the study of the some of the physical properties that are related. Usually M20 grade of the concrete is the most commonly used in the constructional works, hence in this study M20 cement concrete is considered in which the recycled plastic waste is used as the replacement of fine aggregate in the concrete.

Recycling and Reusing Concrete - NY Engineers

STEP 3: Concrete is separated into large and small aggregate. There is an alternative method to recycle concrete that involves pulverization. However, this complicates the separation process and may result in more contamination from smaller byproducts. As described above, industrial equipment is required to recycle concrete in the most ...

Invasive alien biomass is used as an alternative aggregate ...

This paper tests a new type of non-structural bio-concrete, using invasive alien wood chips as a substitute for sand and gravel as aggregates, for future residential construction in Cape Town, comparing this new material to conventional and to earth-based materials, and benchmarking different policy scenarios.

Materials | Special Issue : Recycled Aggregate Concrete ...

For full incorporation of coarse recycled concrete aggregates and the design of elements without shear reinforcement, the calibrated partial factor reduces the design value of shear resistance by 10% (design with EN1992) or 15% (design with prEN1992) in comparison to natural aggregate concrete's design.

Best Eco-Friendly Alternatives for Concrete | Zameen Blog

In This Post: About traditional concrete Eco-friendly concrete alternatives. We had previously shared some tips on how to build an eco-friendly home and some tips to recycle water at home to help you take the first steps towards a sustainable lifestyle.And now, here's a compilation of some green building materials, especially eco-friendly alternatives for concrete, to make sure you get the ...

Garden Guides | Low Cost Alternatives to Concrete Patio

Using Gravel. Gravel may not be the first material that comes to mind for creating a patio, but gravel is available in a wide variety of textures and colors and is an affordable alternative to concrete. Gravel can be used alone, contained in a wooden frame to prevent the pebbles from migrating to other areas of the yard or used in conjunction ...

5 Eco-Friendly Alternative Aggregates for Concrete!

Posted on July 18, 2019. Concrete is a mixture of cement, gravel, sand, water and a range of aggregates. With about 10 billion tons of concrete produced every year, it is the most consumed substance in the world, second only to water.. It is also the world's most widely used material for construction – from bridges to large buildings, concrete forms the very foundation of our …

Sawdust as an Alternative Material for Sand in Concrete ...

Sawdust as an Alternative Material for Sand in Concrete Mixture ... This predicament leads the researcher to look for possible substitutes for natural aggregates particularly sand by investigating the potential use of sawdust as alternative for sand as fine aggregate in a concrete mixture. ... method was used by the researchers for it examined ...

What are the Materials for Replacement of Sand in Concrete ...

Aggregate is a granular material, such as sand, gravel, crushed stone used with a cement to produce either concrete or mortar. Aggregate is relatively inexpensive and does not enter into complex chemical reactions with water; it has been customary, therefore, to treat it as inert filler in concrete and mortar.

Chicken Feathers as Substitute for Fine Aggregates in …

substitute for fine aggregates for concrete was conducted. Chicken feathers collected from slaughter houses (waste material) were utilized after previous studies conducted revealed that chicken feathers posses good durability and resistance to degradation because of the extensive cross-linking and strong covalent bonding within its structure.

Concrete Aggregate - an overview | ScienceDirect Topics

Concrete Aggregate. RCA contains a percentage of material containing mortar and if this is taken into account when designing a concrete mix, there is a likelihood that equal or better compressive strength can be achieved using RCA when compared to NA. From: Handbook of Recycled Concrete and Demolition Waste, 2013. Download as PDF.

USE OF RECYCLED OYSTER SHELLS AS AGGREGATE FOR …

6:1 for the ratio of total raw material moved to a given volume of concrete (Low, 2005). Aggregates are generally mined or quarried from more than 9,000 pits and quarries across the country. (Shulman, 2005) Though it may stand to reason that the Earth is made of rock …

Concrete without Cement - A Green Alternative Fly Ash ...

Concrete without cement is possible with the use of fly ash as an alternate for cement. It matches both the chemical and physical properties of cement. Thus it has the ability to replace cement completely. The word "concrete" defines as the bonding between aggregates, cement and water. Concrete is the most common material used for construction ...

The Influence of Alternative Materials on Alkali Aggregate ...

Amongst possible alternatives, biomass waste (i.e. wood-ash - WA) and mineral fillers (MF) are seen as viable products due to their large availability and interesting physicochemical features. Yet, the short and long-term behaviour of concrete incorporating WA or MF are still unclear, particularly their durability