• Factorial Design for Studying the Properties of Recycled ...

    Aug 22, 2021· Recycled Aggregate Concrete (RAC) mixes (1.15: 2.3: 4.6) cement: fine aggregate (sand): coarse aggregate (demolition concrete waste), water / cement (0.5), and 50 % demolition aggregates were prepared according to standard procedure. The resistance of the recycled aggregate concretes towards chemicals was investigated throughout the attack of (Acid: acetic Acid HAC, and …

  • Mechanical properties of recycled concrete with demolished ...

    This paper presents an experimental investigation on the effect of the replacement of natural coarse aggregate (NCA) with either recycled concrete aggregate (RCA) or recycled clay brick aggregate (RBA) on the compressive strengths of the hardened concrete. Two grades (C25 and C50) of concrete were investigated, which were achieved by using different water-to-cement ratios. In each grade ...

  • Use of recycled coarse and fine aggregates in structural ...

    May 24, 2021· Those findings, which confirmed that the use of recycled aggregate had no effect on concrete workability irrespective of fraction, replacement ratio or nature, were consistent with the data reported by other authors replacing up to of the coarse and fine fractions with recycled concrete, mixed, or masonry aggregate.

  • (PDF) Flexural behavior of Recycled Brick Aggregate Concrete

    Controlled concrete mixture and modified concrete mixture using recycled aggregates and replacement of cement with 10% rice husk ash with 1:2:4 ratio and water/cement (w/c) ratio of 0.5, were ...

  • EFFECT OF CRUSHED CONCRETE AS COARSE AGGREGATES IN ...

    In the face of a possible scarcity of natural aggregates in the future in line with sustainable construction, this research investigates the feasibility of the use of recycled coarse aggregates as an alternative to natural coarse aggregates in structural concrete. The recycled coarse aggregate used in the research was processed from waste ...

  • Recycled concrete as fine and coarse aggregates in ...

    Synopsis. The effects of using crushed concrete as coarse and fine aggregates upon strength and deformation of concrete are reported. The properties of recycled aggregates differ from those of natural aggregates due to the presence of a considerable proportion of mortar attached natural aggregate …

  • (PDF) Using recycled concrete as coarse aggregate in ...

    The objectives of this study was to evaluate the effects of using aggregate produced from recycled concrete as a replacement for natural () coarse aggregate in pavement mixtures.

  • Effect of cover on bond strength of structural concrete ...

    Sep 20, 2020· The conclusion emphasizes the need for more research while using recycled coarse aggregates (RCA) and adding recycled fine aggregates (RFA) for producing structural concrete. Essentially, the use of recycled fines and the effect of cover provisions per standards to unearth the bond behaviour and strength effect cannot be over-emphasized. 4.

  • Effect of Use of Recycled Coarse Aggregate in Concrete ...

    A comparative analysis of the experimental results of the properties of Natural Aggregate Concrete and different replacement ratios of natural aggregates with recycled coarse aggregates is presented in the paper. Recycled aggregate was made by crushing the waste concrete of laboratory test cubes. Four type of concrete mixtures were tested: concrete made entirely with natural coarse aggregate ...

  • Effect of using recycled waste glass coarse aggregates on ...

    Further comparison is made with a general application concrete mixture containing crushed limestone coarse aggregates. At 95% confidence, results of the Kruskal-Wallis test show that the use of recycled waste glass as coarse aggregates in concrete at contents of up to 25% does not significantly affect its abrasion resistance.

  • EFFECT OF RECYCLED COARSE AGGREGATES ON …

    Coarse Aggregate: When size of aggregate is greater than 4.75 mm are termed as coarse aggregate. The coarse aggregates from crushed basalt rock, and result are conforming to IS: 2386 part 3&4 – 1963. For the experimental work RCA has been procured from demolished RCC structure and separated the aggregate manually from the

  • Effect of recycled coarse aggregate on damage of recycled ...

    Apr 03, 2011· 10%· This study evaluates the possibility of measuring the damage of the recycled concrete. In this way, two conventional concretes with a w/c ratio of 0.55 and 0.65 were designed. Based on them, six recycled concretes with different percentages of replacement of natural coarse aggregates with recycled coarse aggregate (20, 50 and ) were obtained. To take into …

  • Effect of Using Recycled Concrete as Coarse Aggregate on ...

    The basic aim of this research was to investigate the effect of using recycled concrete pieces as coarse aggregate on flexural and tensile strength of concrete.

  • The Design and Development of Recycled Concretes in a ...

    Aug 23, 2021· The use of coarse recycled aggregate concrete and RMF (recycled mixed fine aggregate) has a beneficial effect on eco-efficiency to split tensile strength (strength/CO 2 emission ratio), whereas the eco-efficiency is slightly lower (<3%) …

  • Effect of recycled coarse aggregate on concrete ...

    Jun 22, 2011· The coarse aggregate added to mortar matrix plays a skeleton role and improves its compressive strength. The skeleton effect of coarse aggregate increases with the increasing strength of coarse aggregate, and normal coarse aggregate plays the highest, whereas the lowest concrete strength occurs when using the weak recycled coarse aggregate.

  • Effect of Recycled Coarse Aggregate on Concrete Properties ...

    6. The percentage from Recycled coarse Aggregate that can be used in concrete is maximum 35% replacement of Recycled coarse Aggregate. References: Anonymous. 2008. Use of Recycled Aggregate in Construction. Cement Concrete and Aggregate Australia. Akbari, Y.V., Arora, N.K., Vakil, M.D. 2011. Effect on Recycled Aggregate on Concrete Properties.

  • Effect of recycled coarse aggregate on concrete ...

    10%· Jun 22, 2011· The coarse aggregate added to mortar matrix plays a skeleton role and improves its compressive strength. The skeleton effect of coarse aggregate increases with the increasing strength of coarse aggregate, and normal coarse aggregate plays the highest, whereas the lowest concrete strength occurs when using the weak recycled coarse aggregate.

  • EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON ...

    Jul 14, 2020· The natural coarse limestone aggregate was replaced with coarse LRCA and HRCA. As a result of the study, the use of HRCA and %100 LRCA instead of limestone coarse aggregate in the concrete adversely affected its mechanical and physical properties.

  • Effect of Recycled Coarse Aggregate and Bagasse Ash on …

    May 16, 2021· recycled aggregate as a construction material over the last few decades. In two-stage concrete (TSC), coarse aggregates are placed in formwork, and then grout is injected with high pressure to fill up the voids between the coarse aggregates. In this experimental research, TSC was made with recycled coarse aggregate (RCA).

  • Effect of recycled concrete aggregates on strength and ...

    structures creates significant demands for coarse aggregates, such as crushed limestone and gravel, while the demolition of old concrete structures offers significant sourc-es of recycled concrete aggregate (RCA). Currently, RCA use in the United States is largely limited to nonstructural applications, such as road base. Uncertainty and variability

  • (PDF) Effects of using recycled concrete as aggregate on ...

    The effect of using concret,e fine aggregate on the modulus and shrinkage is less than those produced by the use of concrete coarse aggregate. The strength of recycled aggregate concrete can be recovered by making suitable mix alljustments or by the addition of fly ash or silica fume.

  • Mechanical Performance of Concrete Made with Recycled ...

    Sep 15, 2020· The majority of research conducted on recycled aggregate concrete focuses on using recycled coarse aggregates as a granular material [13–15] and as cement stabilised materials in base and subbase layers [16–18]. In contrast, there are few studies on the replacement of coarse and fine aggregate at the same time to prepare recycled concrete.

  • Effect of Recycled Coarse Aggregate Type on Concrete ...

    May 13, 2014· Using multilinear correlation analysis, the influences of these aggregate characteristics and other parameters on the properties of recycled aggregate concrete were evaluated. The results showed that the performance of the concrete containing each type of RA was largely influenced by the aggregate nature and quality, in addition to attached ...

  • Effect of Using Recycled Concrete as Coarse Aggregate on ...

    recycled coarse aggregates, strength properties of concrete are decreased to some extent. The basic aim of this research was to investigate the effect of using recycled concrete pieces as coarse aggregate on flexural and tensile strength of concrete. The investigation was carried out by carrying

  • Factorial Design for Studying the Properties of Recycled ...

    Aug 22, 2021· Recycled Aggregate Concrete (RAC) mixes (1.15: 2.3: 4.6) cement: fine aggregate (sand): coarse aggregate (demolition concrete waste), water / cement (0.5), and 50 % demolition aggregates were prepared according to standard procedure. The resistance of the recycled aggregate concretes towards chemicals was investigated throughout the attack of (Acid: acetic Acid HAC, and …

  • Mechanical properties of recycled concrete with demolished ...

    This paper presents an experimental investigation on the effect of the replacement of natural coarse aggregate (NCA) with either recycled concrete aggregate (RCA) or recycled clay brick aggregate (RBA) on the compressive strengths of the hardened concrete. Two grades (C25 and C50) of concrete were investigated, which were achieved by using different water-to-cement ratios. In each grade ...

  • Use of recycled coarse and fine aggregates in structural ...

    May 24, 2021· Those findings, which confirmed that the use of recycled aggregate had no effect on concrete workability irrespective of fraction, replacement ratio or nature, were consistent with the data reported by other authors replacing up to of the coarse and fine fractions with recycled concrete, mixed, or masonry aggregate.

  • (PDF) Flexural behavior of Recycled Brick Aggregate Concrete

    Controlled concrete mixture and modified concrete mixture using recycled aggregates and replacement of cement with 10% rice husk ash with 1:2:4 ratio and water/cement (w/c) ratio of 0.5, were ...

  • EFFECT OF CRUSHED CONCRETE AS COARSE AGGREGATES IN ...

    In the face of a possible scarcity of natural aggregates in the future in line with sustainable construction, this research investigates the feasibility of the use of recycled coarse aggregates as an alternative to natural coarse aggregates in structural concrete. The recycled coarse aggregate used in the research was processed from waste ...

  • Recycled concrete as fine and coarse aggregates in ...

    Synopsis. The effects of using crushed concrete as coarse and fine aggregates upon strength and deformation of concrete are reported. The properties of recycled aggregates differ from those of natural aggregates due to the presence of a considerable proportion of mortar attached natural aggregate …

  • (PDF) Using recycled concrete as coarse aggregate in ...

    The objectives of this study was to evaluate the effects of using aggregate produced from recycled concrete as a replacement for natural () coarse aggregate in pavement mixtures.

  • Effect of cover on bond strength of structural concrete ...

    Sep 20, 2020· The conclusion emphasizes the need for more research while using recycled coarse aggregates (RCA) and adding recycled fine aggregates (RFA) for producing structural concrete. Essentially, the use of recycled fines and the effect of cover provisions per standards to unearth the bond behaviour and strength effect cannot be over-emphasized. 4.

  • Effect of Use of Recycled Coarse Aggregate in Concrete ...

    A comparative analysis of the experimental results of the properties of Natural Aggregate Concrete and different replacement ratios of natural aggregates with recycled coarse aggregates is presented in the paper. Recycled aggregate was made by crushing the waste concrete of laboratory test cubes. Four type of concrete mixtures were tested: concrete made entirely with natural coarse aggregate ...

  • Effect of using recycled waste glass coarse aggregates on ...

    Further comparison is made with a general application concrete mixture containing crushed limestone coarse aggregates. At 95% confidence, results of the Kruskal-Wallis test show that the use of recycled waste glass as coarse aggregates in concrete at contents of up to 25% does not significantly affect its abrasion resistance.

  • EFFECT OF RECYCLED COARSE AGGREGATES ON …

    Coarse Aggregate: When size of aggregate is greater than 4.75 mm are termed as coarse aggregate. The coarse aggregates from crushed basalt rock, and result are conforming to IS: 2386 part 3&4 – 1963. For the experimental work RCA has been procured from demolished RCC structure and separated the aggregate manually from the

  • Effect of recycled coarse aggregate on damage of recycled ...

    Apr 03, 2011· 10%· This study evaluates the possibility of measuring the damage of the recycled concrete. In this way, two conventional concretes with a w/c ratio of 0.55 and 0.65 were designed. Based on them, six recycled concretes with different percentages of replacement of natural coarse aggregates with recycled coarse aggregate (20, 50 and ) were obtained. To take into …

  • Effect of Using Recycled Concrete as Coarse Aggregate on ...

    The basic aim of this research was to investigate the effect of using recycled concrete pieces as coarse aggregate on flexural and tensile strength of concrete.

  • The Design and Development of Recycled Concretes in a ...

    Aug 23, 2021· The use of coarse recycled aggregate concrete and RMF (recycled mixed fine aggregate) has a beneficial effect on eco-efficiency to split tensile strength (strength/CO 2 emission ratio), whereas the eco-efficiency is slightly lower (<3%) …

  • Effect of recycled coarse aggregate on concrete ...

    Jun 22, 2011· The coarse aggregate added to mortar matrix plays a skeleton role and improves its compressive strength. The skeleton effect of coarse aggregate increases with the increasing strength of coarse aggregate, and normal coarse aggregate plays the highest, whereas the lowest concrete strength occurs when using the weak recycled coarse aggregate.

  • Effect of Recycled Coarse Aggregate on Concrete Properties ...

    6. The percentage from Recycled coarse Aggregate that can be used in concrete is maximum 35% replacement of Recycled coarse Aggregate. References: Anonymous. 2008. Use of Recycled Aggregate in Construction. Cement Concrete and Aggregate Australia. Akbari, Y.V., Arora, N.K., Vakil, M.D. 2011. Effect on Recycled Aggregate on Concrete Properties.

  • Effect of recycled coarse aggregate on concrete ...

    10%· Jun 22, 2011· The coarse aggregate added to mortar matrix plays a skeleton role and improves its compressive strength. The skeleton effect of coarse aggregate increases with the increasing strength of coarse aggregate, and normal coarse aggregate plays the highest, whereas the lowest concrete strength occurs when using the weak recycled coarse aggregate.

  • EFFECT OF RECYCLED CONCRETE AGGREGATE QUALITY ON ...

    Jul 14, 2020· The natural coarse limestone aggregate was replaced with coarse LRCA and HRCA. As a result of the study, the use of HRCA and %100 LRCA instead of limestone coarse aggregate in the concrete adversely affected its mechanical and physical properties.

  • Effect of Recycled Coarse Aggregate and Bagasse Ash on …

    May 16, 2021· recycled aggregate as a construction material over the last few decades. In two-stage concrete (TSC), coarse aggregates are placed in formwork, and then grout is injected with high pressure to fill up the voids between the coarse aggregates. In this experimental research, TSC was made with recycled coarse aggregate (RCA).

  • Effect of recycled concrete aggregates on strength and ...

    structures creates significant demands for coarse aggregates, such as crushed limestone and gravel, while the demolition of old concrete structures offers significant sourc-es of recycled concrete aggregate (RCA). Currently, RCA use in the United States is largely limited to nonstructural applications, such as road base. Uncertainty and variability

  • (PDF) Effects of using recycled concrete as aggregate on ...

    The effect of using concret,e fine aggregate on the modulus and shrinkage is less than those produced by the use of concrete coarse aggregate. The strength of recycled aggregate concrete can be recovered by making suitable mix alljustments or by the addition of fly ash or silica fume.

  • Mechanical Performance of Concrete Made with Recycled ...

    Sep 15, 2020· The majority of research conducted on recycled aggregate concrete focuses on using recycled coarse aggregates as a granular material [13–15] and as cement stabilised materials in base and subbase layers [16–18]. In contrast, there are few studies on the replacement of coarse and fine aggregate at the same time to prepare recycled concrete.

  • Effect of Recycled Coarse Aggregate Type on Concrete ...

    May 13, 2014· Using multilinear correlation analysis, the influences of these aggregate characteristics and other parameters on the properties of recycled aggregate concrete were evaluated. The results showed that the performance of the concrete containing each type of RA was largely influenced by the aggregate nature and quality, in addition to attached ...

  • Effect of Using Recycled Concrete as Coarse Aggregate on ...

    recycled coarse aggregates, strength properties of concrete are decreased to some extent. The basic aim of this research was to investigate the effect of using recycled concrete pieces as coarse aggregate on flexural and tensile strength of concrete. The investigation was carried out by carrying