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influence research on the pretreatment of recycled coarse

Properties of Self-Compacting Concrete with Recycled

The utilisation of recycled concrete aggregate RCA in Self-Compacting Concrete SCC has the potential to reduce both the environmental impact and financial cost associated with this increasingly popular concrete type. However to date limited research exists exploring the use of coarse RCA in SCC. The work presented in this paper seeks to build on the existing knowledge in this area by

Influence of the pretreatment of recycled aggregates

2020. 1. 17.& 0183;& 32;In this study the intrinsic properties of recycled coarse aggregates RC associated with bonded mortar were modified with two different pretreatment techniques viz-a-viz HCl pretreatment Asad Hanif

Influence of Recycled Coarse Aggregate on Punching

This paper reports on the punching shear behavior of simply supported recycled aggregate concrete two-way slabs. The experimentation was conducted on 15 Recycled Coarse Aggregate Concrete RCAC slab specimens and 3 Natural Aggregate Concrete NCAC slabs were cast tested as control specimens. All the slabs were simply supported on all four edges and tested under a central patch load.

Find and share research - Surface Treatment on Recycled

In this study the intrinsic properties of recycled coarse aggregates RC associated with bonded mortar were modified with two different pretreatment techniques viz-a-viz HCl pretreatment and 预计阅读时间:8

‪Jorge de Brito‬ - ‪Google Scholar‬

Influence of the pre-saturation of recycled coarse concrete aggregates on concrete properties L Ferreira J De Brito M Barra Magazine of Concrete Research 63 8 617-627 2011

Organic Pretreatment of Recycled Aggregates of Rural

Through using acetic acid resin asphalt and urea resin organic pretreatment methods to pretreat the surface of rural construction waste and testing of crush index and water absorption rate of recycled coarse aggregate after pretreatment the research for the influence of organic pretreatment technology on physical and mechanical performance of recycled coarse aggregate.

Effect of EMIM Ac Recycling on Salix gracilistyla Miq.

Recycling of ionic liquid 1-ethyl-3-methylimidazolium acetate EMIM Ac after the pretreatment of Salix gracilistyla Miq. was conducted and the effect of the recycling number on the enzymatic saccharifi ion yield was investigated. Enzymatic saccharifi ion was performed using an enzyme cocktail Acremonium cellulase and Optimash BG at 50 and 8451; for 72 h.

Influence of service time of recycled coarse aggregate on

Some other researchers 12 found that service time of recycled coarse aggregate also have an influence on the mechanical properties of recycled coarse aggregate.

Find and share research - Influence of field recycled coarse

This paper investigates the influence of different amounts of recycled coarse aggregates obtained from a demolished RCC culvert 15years old on the properties of recycled aggregate concrete RAC 预计阅读时间:9

Influence of Glass Fibers on Mechanical Properties of

Consumption of fibers and recycled coarse aggregates RCA can add ductility and sustainability to concrete. In this research two mix series 100%NCA and 100%RCA were prepared using four different dosages of GF 0%GF 0.25%GF 0.5%GF and 0.75%GF by volume fraction .

Influence of the pre-saturation of recycled coarse

2020. 1. 22.& 0183;& 32;Based on the knowledge of RCCA's water absorption behaviour this research is aimed at determining the influence of the pre-saturation of the RCCA method on concrete's fresh and hardened properties compared with a conventional concrete and a recycled aggregates concrete produced using the mixing water compensation method.

Durability assessment of concrete containing surface

TY - JOUR. T1 - Durability assessment of concrete containing surface pretreated coarse recycled concrete aggregates. AU - Sasanipour Hossein. AU - Aslani Farhad. PY - 2020/12/20. Y1 - 2020/12/20. N2 - Recycled aggregate concrete RAC made with recycled concrete aggregates RCA is different from conventional concrete cast with natural aggregates due to the adhered cement mortar on RCAs

Frontiers Seismic Performance of Recycled Concrete

This study was conducted to experimentally investigate the behavior of recycled concrete-filled circular steel tube RCFST columns subjected to cyclic loading. Ten specimens were prepared and tested. Four parameters were used to characterize seismic behavior: the replacement percentage of recycled coarse aggregate slenderness ratio axial compression level and steel ratio.

Pretreatment recycled aggregates for concrete - CORE

Pretreatment recycled aggregates for concrete . By Carla Priano density and higher water absorption than natural ones.This research presents different impregnation treatments of the recycled coarse aggregate obtained from concrete containing boulder Discover our research

Durability assessment of concrete containing surface

2020. 12. 20.& 0183;& 32;Coarse RCAs with the maximum aggregate size of 19 mm in diameter were prepared in the laboratory using rock crashing machine. The water absorption and the specific gravity of coarse RCAs were measured according to ASTM C 127 which were 5.4% and 2.39 respectively. In this study fine and coarse NAs with a specific gravity of 2.63 and water absorption of 1.7% and 2.61%

Influence of amount of recycled coarse aggregates and

2007. 5. 1.& 0183;& 32;Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete. If the recycled coarse aggregate is not humid The authors also want to thank the Environmental Research Program of the Technical University of Catalonia for the financial support provided.

Shodhganga INFLIBNET: Behaviour of recycled

2015. 12. 4.& 0183;& 32;Little research has been conducted on punching shear newlineand flexure behavior of reinforced recycled concrete slab elements. newlineThis thesis reports influence of recycled aggregate on the structural behavior newlineof two way

Research on the Properties of Mineral–Cement Emulsion Mixtures Using Recycled

& 0183;& 32;2 天前& 0183;& 32;A significant influence of asphalt binders on physical and mechanical parameters such as intermediate tensile strength creep modulus stiffness or free space content of mixes recycled using the cold method was demonstrated in the works 3031 . The type of binder had a significant impact on the compaction properties of the tested mixes which

Green Concrete from Sustainable Recycled Coarse

Present investigations deal with the development of green concrete M 30 grade using recycled coarse aggregates for sustainable development. Characterization of recycled coarse aggregates showed that physical and mechanical properties are of inferior quality and improvement in properties was observed after washing due to removal of old weak mortar adhered on its surface.

Influence of Natural Coarse Aggregate Type on the

The use of recycled concrete represents an environmentally friendly solution for minimizing the impact of construction and demolition wastes. In many countries the incorporation of recycled coarse aggregate RCA is a common practice because the maximum contents of RCA are usually limited to approximately 25% of the total coarse aggregate content.

An overview on the efficiency of different pretreatment

2020. 8. 1.& 0183;& 32;The inferior quality of recycled concrete aggregate RCA caused by the adhered mortar AM can be principally enhanced through either removing or strengthening the AM. This paper reviews the effect of various pretreatment methods removal impregnation pozzolanic slurry immersion accelerated carbonation curing and bio-deposition on the inherent defects of RCA and compares

Find and share research - Surface Treatment on Recycled

In this study the intrinsic properties of recycled coarse aggregates RC associated with bonded mortar were modified with two different pretreatment techniques viz-a-viz HCl pretreatment and

Influence of Recycled Coarse Aggregate on Punching

This paper reports on the punching shear behavior of simply supported recycled aggregate concrete two-way slabs. The experimentation was conducted on 15 Recycled Coarse Aggregate Concrete RCAC slab specimens and 3 Natural Aggregate Concrete NCAC slabs were cast tested as control specimens. All the slabs were simply supported on all four edges and tested

Influence Research on the Pretreatment of Recycled Coarse

Large amounts of waste clay brick generated in the city expansion process which formed serious harm on the city environment and resulted in the waste to the aggregate resources. The waste clay brick was processed the recycled aggregate which can be used for preparing the recycled concrete. The pretreatment method to recycled aggregate have certain influence on the compressive strength of Author: Lin Gao Yan Shi Guo Qiang Xu Lei Cao

Influence of the pre-saturation of recycled coarse concrete

2020. 1. 22.& 0183;& 32;Based on the knowledge of RCCA's water absorption behaviour this research is aimed at determining the influence of the pre-saturation of the RCCA method on concrete's fresh and hardened properties compared with a conventional concrete and a recycled aggregates concrete produced using the mixing water compensation method.

건설융합학부 토목공학전공

1. Properties enhancement of recycled aggregate concrete through pretreatment of coarse aggregates - comparative assessment of assorted techniques 2018.04. 2. Effect of steel fiber volume fraction and aspect ratio type on the mechanical properties of

Influence of Moisture States of Recycled Coarse

The use of recycled aggregate to produce new concretes has become increasingly widespread and numerous studies have demonstrated that the final product performs similarly to traditional concrete. 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.

Recycled lightweight concrete made from footwear

The goal of this study was to evaluate the influence of the use of these recycled aggregates as replacements of the natural coarse aggregate upon density compressive strength tensile splitting strength and flexural behavior of recycled concrete. The experimental program was developed with three w/c ratios: 0.49 0.63 and 0.82.

Development of Processing Methods to Improve Strength

This paper presents the results of a comprehensive experimental study on RACs made of 100% recycled coarse aggregate. Three different mixing approaches several surface pretreatment methods with two different pretreatment materials were used to improve the compressive strength of RAC.

Properties enhancement of recycled aggregate concrete

2018. 8. 1.& 0183;& 32;Properties of recycled coarse aggregates RC were improved by pre-treating with HCl and Na 2 SO 4.. HCl pretreatment was demonstrated twice as beneficial as Na 2 SO 4 pretreatment.. Concretes incorporating treated RC showed remarkable properties enhancement. Recycled aggregate concrete properties were also modeled by regression based on bonded mortar content.

Influence of the Quality of Recycled Aggregates on the

The main objective of this experimental work is to analyse the effect of recycled aggregates RA on the basis of the study of the various qualities of the physical mechanical and durability properties of high performance concrete HPC . Five types of recycled aggregates: three coarse RA sourced from parent concretes of 100 60 and 40 MPa as well as one coarse mixed recycled aggregate and

Mechanical and Freeze-Thaw Durability Properties of

The influence of recycled coarse aggregates RCAs on the fresh hardened and freeze-thaw durability properties of recycled aggregate concrete RAC is investigated in the research reported in this paper. Four different mixes were considered with natural aggregate and three different replacement levels of RCA i.e. 1 30% 2 40% and 3 50% .

Effect of Recycled Sand Content on Characteristics of

When recycled aggregate is used for concrete manufacture in many cases these aggregates are accompanied by a recycled sand content. This research focuses on concretes prepared with recycled sand content. First the research examined the effects of recycled sand content on the characteristics of mortar—density and compressive and flexural strength—by using recycled

Find and share research - PDF The influence of recycled

Use of Recycled Coarse Aggregate RCA in concrete can be described in terms of environmental protection and economy. This paper deals with the mechanical properties of concrete compressive

Influence of Fly Ash as Cement Replacement on the

This paper tries to address the deficiency of the use of recycled aggregates by systematically presenting results on the influence of incorporating Class F fly ash on concrete properties. In this study two series of concrete mixtures were prepared with water-to-binder W/B ratios of 0.45 and 0.55.

Stress-Strain Relationship Curve Analysis of Recycled

2021. 1. 20.& 0183;& 32;The use of recycled coarse aggregate RCA in natural aggregate concrete NAC is a sustainable solution to the problem of solid waste worldwide. The

PROPERTIES OF RECYCLED AGGREGATE CONCRETE

& 0183;& 32;2015. 2. 18.& 0183;& 32;recycled coarse aggregate typically ranges within the interval from 3.5% to 10% and for the fine aggrega-te within the interval from 5.5% to 13% 27 . According to the Japanese standard for the use of recycled aggregate as a component of concrete there is a limit so that a coarse fraction of recycled

Effect of recycled coarse aggregate on damage of

2011. 4. 3.& 0183;& 32;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 100% were obtained.

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