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ReviewAn evaluation of the recycled aggregate
2020年4月20日· The difference between the properties of recycled aggregate (RA) and natural aggregate (NA) are caused due to the old mortar attached to RA In this review, the quantitative relationships were represented about the content of old attached mortar and2021年8月1日· recycled aggregate s recycled aggregate concrete mechanical properties models of compressive strength 1 Introduction “Let's get this on the tableA Comprehensive Review on Recycled Aggregate and
The morphological characteristics of brickconcrete
2021年12月1日· The physical properties and morphological characteristics of recycled coarse aggregates are tested • Angularity, sphericity and texture are used to evaluateIn one hand, recycled aggregate is mainly derived from waste concrete; concrete with various strength grades may lead to great difference in performance of recycledFractal characteristic of recycled aggregate and its
Systematic Approach of Characterisation and Behaviour
Discusses systematically the characteristics of recycled aggregate obtained from different sources of construction waste Clarifies how recycled aggregate differs from naturalof aggregate characteristics is of great significance for improving the quality of recycled concrete Based on the coarse aggregate content, maximum aggregate size, andResearch Article Jiangwei Bian, Wenbing Zhang*, Zhenzhong
Incorporating coarse and fine recycled aggregates into concrete
2023年11月6日· Materials and reagents The application of recycled concrete aggregates (RCA) serves as a widely embraced method on behalf of repurposing concrete waste,2023年11月3日· The use of recycled coarse aggregate (RCA) produced from waste concrete in new concrete is an effective way to realize the recycling of construction andEffect of carbonation duration on properties of recycled aggregate
Properties of Recycled Aggregates | SpringerLink
2018年6月17日· This chapter emphasizes the physical and mechanical characteristics of recycled aggregate along with findings of different researchers The physical properties such as grading, size and texture, density, specific gravity, water absorption, flakiness and elongation indices of recycled aggregates are discussed in detail2021年2月22日· Using waste concrete to produce recycled aggregate concrete can reduce the consumption of natural aggregate and promote the effective consumption of construction waste [1] However, because old mortars are attached to recycled aggregate, the mechanical properties and durability of recycled aggregate concrete are poor [2],Pore characteristics of recycled aggregate concrete and its
The morphological characteristics of brickconcrete recycled
2021年12月1日· Due to the complication of sources and types of CDW, there are great differences in properties among recycled coarse aggregates [6, 7]Most of the demolished buildings in Chinese cities are brickconcrete structures built in the 1960s–1980s, and such recycled aggregates are mainly composed of crushed brick aggregate and crushed2021年2月22日· As shown in Table 1, three types of recycled aggregate concrete were prepared, with water binder ratio (w/b) of 048, sand ratio of 37%, and recycled aggregate content of 100%“M1” refers to ordinary recycled aggregate concrete; “M2” refers to recycled aggregate concrete prepared with 15% fly ash equivalent instead of cement;Pore characteristics of recycled aggregate concrete and its
Effect of particle distribution on the shear behavior of recycled
2022年5月12日· Effect of particle distribution on shear characteristics The effect of particle distribution shear stress of the recycled waste concrete aggregate with seven kinds of particle distributions under various normal stresses is shown in Fig 5The trend of the shear stress is basically the similar under the different particle distributions2013年3月29日· After demolition of old roads and buildings, the removed concrete is often considered worthless and disposed of as demolition waste By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig 1)This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that isRecycled Concrete Aggregates: A Review | International Journal of
Environmental Evaluation of Concrete Containing Recycled and By
2020年10月26日· This study aims to compare the potential environmental impact of the manufacture and production of recycled and byproduct aggregates based on a life cycle assessment and to evaluate the environmental impact and cost when they are used as aggregates in concrete To this end, the six potential environmental impacts (ie, abiotic2023年6月21日· First, the aggregate fragmentation caused by compaction effort was simulated using the superpave gyratory compactor In this regard, the influences of aggregate type and RA content were investigated Second, the indoor experiment scheme was determined using the Taguchi method to obtain compaction data of recycledEvaluation of Factors Influencing the Compaction Characteristic
Strength and durability of concrete containing recycled
2018年9月1日· Saravanakumar and Dhinakaran [38] studied the durability characteristics of recycled aggregate concrete with respect to its resistance to chloride ion penetration, sorptivity and acid attack resistance It was concluded that the durability of concrete decreases with addition of recycled concrete aggregates2022年12月5日· However, due to its inferior characteristics of porous nature and higher water absorption capacity, recycled clay bricks as coarse aggregate resulted in the degradation of the mechanical properties and durability with the increase of replacement level, and thereby limited its utilization at low replacement level in concrete producing forEffect of pore structure and morphological characteristics of recycled
Characteristics of highperformance steel fiber reinforced recycled
2022年6月1日· Recycled concrete aggregate was included in the blends at percentage substitution of natural limestone coarse aggregate at rates of 50% and 100% The recycled concrete aggregate was extracted from the 45 and 85 MPa compressive strengths because it was already available in the lab and is mentioned as R45 and R852023年2月19日· Physical characterization shows that recycled concrete aggregate has better physical properties compared with mixed recycled aggregate and ceramic recycled aggregate, which makes it moreIJERPH | Free FullText | Characterization of Three
Effects of fine aggregate content on the unsaturated hydraulic
2023年7月26日· Recycled concrete aggregate (RCA) can be used in landfill and slope cover systems, where its unsaturated hydraulic properties play an important role The hydraulic behavior of RCAs can be potentially controlled through mixing coarse and fine aggregates by a predetermined proportion, which lacks experimental validation In this2022年10月24日· The pore structure characteristic is the essential factor affecting chloride ion transport behavior, which depends on the mixed types of recycled aggregate, curing age and w/b The schematic diagram of the porous interface model of RMA concrete is established to analyze the chloride ion transport mechanismStudy on the chloride ion transport mechanism of recycled mixed
Effect of biomineralization technique on the strength and
2021年7月5日· Several methods have been studied to make the properties of RAC equal to natural aggregate concrete (NAC), including pretreatments of RCA such as soak recycled aggregate in acid before use [8], [9], trying to reduce the mortar content of RCA by giving certain revolutions in los angeles abrasion machine and by thermally treating them in2021年1月24日· Abstract The characteristics of surface appearances, mass loss, relative dynamic modulus of elasticity and strength loss of different recycled aggregate concretes (RAC) exposed to freezethaw cycles were analyzed It was found that the freezethaw resistance of RAC could be determined by the recycled aggregate compositions andFreezethaw Durability of Recycled Aggregate Concrete: An
Hydration mechanism and strength properties of recycled aggregate
The increased strength was an indication that the interfacial transition zone between the aggregate and blended cement paste enhanced the properties of recycled aggregate concrete (RAC) However, the tensile behavior of RAC was irregular, it initially decreased with 20% ceramic powder addition but it increased when 30% ceramic powder was added2018年9月1日· Dantas et al [46] proposed an artificial neural network based model to predict the compressive strength of recycled aggregate concrete by considering the physical characteristics of aggregates, composition of construction and demolition waste and design parameters such as mortar content, cement content, aggregate content andStrength and durability of concrete containing recycled concrete
Deterioration Performance of Recycled Aggregate Pervious
2023年2月28日· To study the performance of recycled aggregate pervious concrete (RAPC) in severe cold regions, the influence of the water–binder ratio, design porosity, micro silica fume (SF) and enhancer agent (EA) on the permeability and mechanical properties of the RAPC were evaluated using the orthogonal design method Based on the optimal2021年6月17日· Currently, a number of disadvantages hampers the use of recycled concrete aggregates (RCA) The current review proves that concretes made with complete replacement of natural aggregate with RCA allow the production of highquality concrete One of the possibilities for improving concrete properties with RCA is the use of extendedCrystals | Free FullText | Design Strategy for Recycled Aggregate