influence of amount of recycled coarse aggregates and


Influence of amount of recycled coarse aggregates and production .The influence of the order of materials used in concrete production (made with recycled aggregates) with respect to improving its splitting tensile strength was analysed. The lower modulus of elasticity of recycled coarse aggregate concretes with respect to conventional concretes was measured verifying the numeral models.influence of amount of recycled coarse aggregates and,Influence of the amount of recycled coarse aggregate in concrete .Recycle construction wastage is the promising way towards sustainable construction. Recycled coarse aggregate (RCA) is the most common idea, but it does not gain wide acceptance among practitioners due the adhered mortar poses which deleterious effects on the concrete. However, a suitable concrete mix design.The influence of kind of coating additive on the compressive strength .Chai [4] reported that the compressive strength of RAC decreased by 4 to 37% with increase in percentage replacement of coarse RCA. Jian Zhuang Xiaoa et al. also concluded in 2004 [5] that the compressive strength of recycled aggregate concrete generally decreases with increasing recycled aggregate contents.

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The influence of the use of recycled aggregates on the compressive .

Nov 10, 2014 . The variables examined were the RA characteristics such as size, type, moisture content, quality of the source material, water to cement (w/c) ratio of the ... The literature review has shown that the use of coarse recycled masonry aggregates (RMA) normally reduces the strength of concrete to a greater.

Influence of amount of recycled coarse aggregates and production .

The influence of the order of materials used in concrete production (made with recycled aggregates) with respect to improving its splitting tensile strength was analysed. The lower modulus of elasticity of recycled coarse aggregate concretes with respect to conventional concretes was measured verifying the numeral models.

Influence of Recycled Coarse Aggregate on some Properties of .

Abstract. Sustainable development in the construction industry has become a major concern over the years mainly driven by the waste produced during construction, but more particularly, during demolition and/or destruction of concrete structures. Due to this ever increasing amount of concrete waste, the idea of recycling.

Influence of field recycled coarse aggregate on . - Springer Link

May 6, 2010 . Abstract This paper investigates the influence of different amounts of recycled coarse aggregates obtained from a demolished RCC culvert 15 years old on the properties of recycled aggregate concrete. (RAC). A new term called ''coarse aggregate replace- ment ratio (CRR)'' is introduced and is defined as.

Effect of Recycled Coarse Aggregate Type on Concrete | Journal of .

The types of aggregate used represent the three main constituents within recycled aggregates: unbound stone, crushed concrete, and crushed brick. Tests for mechanical properties of different types of recycled aggregate included crushing value and abrasion resistance. Using multilinear correlation analysis, the influences.

PROCESSING AND PROPERTIES OF RECYCLED AGGREGATE .

can be produced by concrete crusher. The aggregates are categorized by size as coarse and fine aggregate. If recycled aggregates were practically useful in . [3] suggested an idea that the properties of the fresh and hardened concrete could be influenced by the initial moisture states of the recycled aggregates. They set.

The influence of kind of coating additive on the compressive strength .

Chai [4] reported that the compressive strength of RAC decreased by 4 to 37% with increase in percentage replacement of coarse RCA. Jian Zhuang Xiaoa et al. also concluded in 2004 [5] that the compressive strength of recycled aggregate concrete generally decreases with increasing recycled aggregate contents.

Effect of Recycled Coarse Aggregates in Properties of Concrete .

The test results indicated that the replacement of natural coarse aggregates by recycled aggregates up to 40% had little effect on the compressive strength, but higher levels of replacement reduced the compressive strength. A replacement level of causes a reduction of 28% in compressive strength, 36% in split.

Influence of the pre-saturation of recycled coarse concrete .

May 25, 2015 . The properties of structural concrete which incorporates recycled coarse concrete aggregates (RCCA) may be affected by the RCCA's properties, especially in terms of water absorption, if no technological control methods are adopted in its production. Based on the knowledge of RCCA's water absorption.

INFLUENCE OF THE INCORPORATION OF RECYCLED .

it evaluates the effect of the incorporation of recycled concrete coarse aggregates (RCCA) on the punching strength of concrete slabs. .. particle size was 22.4 mm. Table 2 - Composition of the mixes. Component. Volume (m3/m3). RC. C20. C50. C100. Natural coarse aggregates. 22.4 - 16 mm. 0.121. 0.097. 0.061. 0.000.

Effect of Recycled Coarse Aggregate on Concrete Properties | Open .

In terms of the use of recycled aggregate, the percentage of recycled aggregate should be determined because the strength of concrete would not be obtained by the high percentage of recycled aggregate.The scope of study is about comparison between recycle coarse aggregate and natural aggregate in terms of specific.

Impact Resistance of Recycled Aggregate Concrete with Single and .

specific gravity of 3.15 g/cm3. In this study, all of the coarse aggregates used had a maximum size of. 20 mm. The natural coarse aggregate used was crushed granite. The coarse RCA used was generated from waste concrete cube collected from the debris collection area. Jaw crushers were used to crush and break down.

Performance of Recycled Aggregate Concrete in a Real Project .

“Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete”, Cement and Concrete Research, Vol. 37, No. 5, pp. 735–742. Google Scholar, Crossref. Fathifazl, G., Abbas, A., Razaqpur, A. G., Isgor, O.B., Fournier, B. and Foo, S. (2009). “New mixture proportioning.

Effect of Flyash on Recycle Coarse Aggregate Concrete

In this experimental study the natural coarse aggregate is replaced with recycled coarse aggregate at different percentage and the mechanical strength of concrete is tested. In addition the flyash is introduced as replacement of Cement to improve the quality of concrete. The mix designing is done for water cement ratios 0.38.

Effect of Mortar Reduction in Recycled Aggregates Used in Concrete .

A mechanical abrasion process is used to reduce the amount of mortar in different degrees from the recycled aggregates that will be used to replace a 40 % of natural coarse aggregates in structural concrete. The mechanical behavior is studied through the compressive and flexural strength of the material and compared.

effectiveness of using recycled coarse aggregates (rca) - IRAJ

0%, 25%, 50% and of recycled coarse aggregates and found that workability is depends on the absorption capacity, shape and texture of the recycled aggregates. And also found Concrete made with of coarse recycled aggregate requires high amount of cement to achieve a high compressive strength and.

Influence of Moisture States of Recycled Coarse Aggregates on the .

However, construction and demolition waste (CDW) presents certain characteristics which could limit its acceptance in the construction sector due to worse performance than natural aggregates. One example of this is water absorption, which in recycled aggregates reaches such high values that the amount of free water.

MECHANICAL AND DURABILITY PROPERTIES OF RECYCLED .

Chapter 5 : INFLUENCE OF REPEATED RECYCLED COARSE AGGREGATE ON THE. FRESH AND HARDENED ... Table 2.3: Variation of attached mortar contents with the particle size of recycled aggregate .. 15. Table 2.4: .. Figure 4.4 The percent (%) change in compressive strength of concrete made with different.

effect of fly ash on the strength of concrete made from recycled .

1.1. To compare the effect of using recycled coarse aggregate in concrete, the natural coarse aggregate was set to have similar size distribution as recycled coarse aggregate which consisted of 82% of fine gravel and 18% of gravel. 3.1.2 Cement and fly ash. Portland blast-furnace slag cement qualified for. JIS R 5211 Type.

Effect of Fly Ash on the Strength of Porous Concrete using Recycled .

Effect of Fly Ash on the Strength of Porous Concrete using. Recycled Coarse Aggregate to replace Low-Quality Natural. Coarse Aggregate. Eva Arifi1, a), Evi Nur . Porous concrete is a concrete that has more pores than normal concrete. The material of porous concrete is cement and a coarse aggregate of a certain size.

Effect of replacement of natural aggregates by recycled aggregates .

to study the effect of replacing NA by RA. Test results show that for different percentage replacements of natural coarse aggregates by recycled aggregates there is a reduction in strength of concrete with the increase in the percentage of replacement. For replacement of natural aggregates by recycled aggregates up to 20%,.

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