· Xiong et al. [4] studied the mechanical properties of recycled concrete with different coarse aggregate substitution rates and put forward the prediction formula of compressive strength. Liang et
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· This paper discusses the suitability of producing concrete with 100 % recycled aggregate to meet durability and strength requirements for different applications. Aggregate strength, gradation, absorption, specific gravity, shape and texture are some of the physical and mechanical characteristics that contribute to the strength and durability
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Roles of recycled fine aggregate and carbonated recycled fine aggregate in alkali-activated slag and glass powder mortar Constr Build Mater , 364 ( 2023 ) , 10.1016/j.conbuildmat.2022.129876 Google Scholar
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· The resistance to mechanical actions such as impact, crushing and abrasion for the recycled concrete aggregates is also lower. The effects of using recycled concrete aggregates instead of natural
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:Aggregate StrengthRecycled Aggregate ConcreteRecycled Concrete Aggregates · Compressive strength and resistance to chloride ion penetration and carbonation of recycled aggregate concrete with varying amount of fly ash and fine
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· Currently, one method of recycling waste concrete is to crush, clean, and grade waste concrete to obtain recycled aggregate particles. The particles with a size less than 4.75 mm after crushing
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· Waste reduction and decreasing the need for natural aggregate are significant environmental factors that should be taken into consideration. Both can be achieved by incorporating recycled concrete aggregate into fresh concrete mixes. Most previous studies on concrete incorporating recycled concrete aggregates mainly
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· Natural aggregate was replaced with discarded concrete and clay brick aggregates. Addition of recycled clay brick aggregates increases the crushing index. Increase of crushing index exerts a negative impact on mechanical properties. The effects of crushing index on the porosity and permeability can be ignored.
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Foam concrete is a low-density controlled strength material that can potentially be used for accommodating different types of particles—recycled fine aggregate being an example. The paste matrix of this material has a cellular microstructure, and bulk performance is readily affected by the inclusion of fines. To study the effect of inclusion of fines on
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· To understand the prospect of recycling recycled brick aggregate (RBA), concrete samples were collected from 50 demolished building sites over a period of 20 years. After investigation of the properties of RBA, concrete specimens (RBAC) were fabricated using recycled brick aggregate (RBA). The variables were W/C (0.55, 0.45,
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· The production of high performance concrete was carried out using a coarse mixed recycled aggregate (CMA) obtained from a Spanish Construction and demolition treatment plant. A substitution ratio of 20%, 50% and 100% of natural coarse aggregates for coarse mixed recycled aggregates was employed.
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:Recycled Aggregate ConcreteProperties of Recycled AggregateJianzhuang Xiao · The present study is an investigational study on the behavior of recycled aggregate concrete indicating coarse and fine aggregates for the strength, also
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· Different regulations specify a maximum water/cement ratio (w/c) in concretes with durable requirements. The Spanish Code (EHE, 2008) and the American Code (ACI 318, 2008) indicates maximum w/c ratios 0.45 and 0.40, respectively, while in the case of Argentinean Regulation (CIRSOC 201, 2005) the maximum w/c ratio is 0.45..
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· The relationship between the microcracks of a single particle and the crushing strength was studied by virtual experiments. The three-dimensional profile of a single particle was obtained by CT-scanning technology. The particle bonding model is used to fill the three-dimensional contour to construct virtual particles, and the virtual crushing
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:Recycled Concrete AggregatesCivil EngineeringConcrete and CementThis chapter will mainly introduce the crushing and sieving techniques used around the world, the properties of recycled fine aggregate (RFA) and recycled coarse aggregate
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· It has been reported that the variation of the crushing strength of granular materials can be captured by a Weibull distribution [43]. To investigate the statistics of the crushing strength of RCA particles with different shapes, about 35 particles from each shape group were created and the DEM simulations were performed on the created
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:Aggregate StrengthCivil EngineeringConcrete and Cement · This paper sets the foundations for better understanding the quality of fRCA obtained either from parent concrete specifically produced in the laboratory, with
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· 4. Compressive and flexural strength are influenced similarly, i.e., the strength of mortar specimens reduced as the use of recycled fine aggregate at all curing times (7, 14 and 28 days), however, strength of mortars fabricated with 50%, 75% and 100% recycled aggregate are not statistically different. 5.
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:Aggregate StrengthRecycled Aggregate Concrete · This study aimed to enhance the performance of RFA as a substitute for river sand in concrete as well as fulfill the present demand for fine aggregates in the
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:Recycled Aggregate ConcreteAggregate StrengthConcrete and Cement · Manzi et al. [] replaced the natural aggregate with RCA (both fine and coarse) fluctuating from 27 to 63.5% of total amount of aggregates by adding acrylic
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· the 3 ,7‐and 28‐day compressive strength of concrete using machine learningbased approaches. To this aim, the paper is presented in two parts. Firstly, linear, nonlinear regression and Random
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· The ratio of tensile splitting strength to compressive strength of RCA concrete is 7.7–11.4% and the ratio of tensile splitting strength to compressive strength of NCA concrete is 7.8–10.0%. It is clear that the gap between the upper and lower limits of the ratios of RCA concrete is greater than that of NCA concrete
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· The waste cement content is mostly avoided as it tends to accumulate in the fine by-products,~20% by mass (Shuto et al., 2014). Studies on the use of recycled aggregates and sand in new concrete
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· strength at 7, 14, 28, and 90days of curing. The p erformance of recycled. concrete with partial replacement of conventional coarse aggregate is. found satisfactory. At 28 days, the maximum
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:Aggregate StrengthRecycled Aggregate ConcreteRecycled Concrete Aggregates · The important properties of fresh and hardened recycled aggregate concrete such as workability, compressive strength, split tensile strength, flexural
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:Aggregate StrengthRecycled Aggregate · This study tested concrete made with 0, 25, 50, and 100 % RCA concrete mixes and concluded that up to 25 % could be replaced without significant change in
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· Therefore, to investigate the effect of recycled fine aggregate with accelerated carbonation on the hardened samples, we conducted tests on mortars made from that fine aggregate. It has shown that mortar has improved strength and durability due to the reduction of mortar voids attached on recycled fine aggregate.
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:Recycled Aggregate ConcreteRecycled Concrete Aggregates · According to the obtained result, it was found that the et al. 444 increase in the percentage of recycle coarse aggregate the workability, compressive strength and tensile strength results
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:Recycled Concrete AggregatesPii Storage Policy FrcaSmart Crusher For CementTo determine the strength and stiffness of various types of recycled aggregate particles, we conducted parallel-plate compression tests on single particles of natural gravel (NG),
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· In this paper, a new recycled aggregate concrete (RAC) was produced with composite coarse aggregate and fine recycled aggregate. The composite coarse aggregate was mixed into continuous gradation by large particle natural aggregate with small particle recycled aggregate. To explore the time-dependent developments of the
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