image of crushing strength of coarse aggregate

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Study on the influence of microcracks of coarse aggregate
2023.9.2 When the coarse aggregate is laid on the pavement, it will be repeatedly affected by various external loads such as wheels. Under the long-term action of load,
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Numerical simulation of influence of coarse aggregate crushing
2022.8.1 The effect of coarse aggregate crushing on the mechanical properties of normal concrete and high-strength concrete during the uniaxial compression test is
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Numerical simulation of influence of coarse aggregate crushing
2022.8.1 The purpose is to explore how the coarse aggregate crushing affects the stress–strain curve, compressive strength, and failure mode of concrete. Furthermore,
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Materials Free Full-Text Crushing Characteristics
2022.8.25 Among the crushed aggregates, the coarse (2.36–13.2 mm) fraction was more than 98%, the small (0.6–2.36 mm) fraction was less than 1% and the fine (0–0.6 mm) fraction was less than 0.5%. Compared
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The prediction of compressive strength for recycled coarse aggregate ...
2023.12.1 The material parameters of natural coarse aggregate and recycled coarse aggregate are shown in Table 2. The apparent densities of NCA and RCA were 2782
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High-quality coarse aggregate recycling from waste concrete
2020.1.29 Considering the mortar liberation ratio and specific energy for the liberation process as well as the water absorption and apparent density of the recycled coarse
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Structure feature and compressive crushing behavior of
14 小时之前 Lightweight expanded clay aggregate (LECA) is a lightweight granular material, which can be used as an ideal backfilling geomaterial attributed to its porous
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Aggregate Crushing Value Test – Procedure,
1 天前 The aggregate crushing value formula is given below, Aggregate crushing value = (W3 / W) or W3 / (W2 – W1) W1 = Empty weight of cylindrical Measure. W2 = Weight of Aggregate with Cylindrical Measure.
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Evaluation of Aggregate Crushing Tests and Their
Mar 27, 2020 Evaluation of Aggregate Crushing Tests and Their Correlation with Superpave Mix Design Properties Authors: Mayra Reyna, A.M.ASCE, Victor M. Garcia, Jose
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Water Permeability Characteristics of Normal Strength ...
2017.11.6 Compressive strength of concrete that could be achieved with brick aggregate varied between 19 and 28 MPa, whereas, for stone aggregate, compressive
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Evaluation of Aggregate Crushing Tests and Their
2020.3.27 Six aggregates sampled from different sources were subjected to various aggregate tests, including the Los Angeles abrasion, micro-Deval, soundness magnesium, and acid insoluble tests. A Superpave mix with a 12.5-mm (1/2-in.) nominal maximum aggregate size gradation was produced with each aggregate source using the same PG
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Effects of coarse aggregate morphology on concrete
2023.1.1 The skeleton structure of concrete is composed of coarse aggregate, and the compressive strength of concrete can be affected by the morphology and strength of the aggregates. In terms of the aggregate morphology, it is generally recommended spherical aggregates should be used in concrete instead of needle-like or flat aggregates [1].
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Mechanical strength and drying shrinkage properties of
2014.10.15 The SEM images in Fig. 3 a show that the surface of untreated RCA is considerably more porous and is covered with a certain amount of loose cement paste (crumbs) and other small impurities, such as dust, which are loosely connected to the bulk aggregate of RCA particles as a result of the crushing process. In this stage of the
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Understanding Effects of Crushing Mechanism on Aggregate Morphology ...
2019.10.25 In the present study, the effects of two different crushing operations (jaw-cone-vertical shaft impact (VSI): JCV and jaw-horizontal shaft impact (HSI): JH) on coarse aggregate morphology were studied. Angularity, texture, sphericity and FE of three different sizes of coarse aggregates: passing a sieve of 19 mm and retaining a sieve of
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Evaluation of Surface-Coated Recycled Coarse Aggregate in
2023.11.21 Alccofine coating on recycled coarse aggregate increases its strength by filling in the pores and voids, reducing porosity and increasing density. ... M-sand with a specific gravity of 2.76 was utilized as the finer aggregate. M-sand is made by crushing hard granite rocks into fine particles and is a manufactured sand that is eco-friendly and ...
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Influence of Coarse-Aggregate Angularity on Asphalt
2020.3.2 The results showed that three-dimensional (3D) angularity is able to characterize the angularity of the coarse aggregate. A lower coarse-aggregate angularity leads to a smaller skid resistance of the asphalt mixture. The angularity greatly influences the high-temperature and compaction performance of asphalt mixtures.
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Effects of Coarse Aggregate Shape Parameters on
2022.10.6 The present study explores the effects of coarse aggregate shape characteristics on the performance of stone matrix asphalt (SMA) mixes. The aggregates were produced with two commonly using different crushing mechanisms, namely JH (jaw-horizontal shaft impactor) and JJV (jaw-jaw-vertical shaft impactor).
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Recycling of industrial and agricultural wastes as alternative coarse ...
2021.6.14 The crushing strength of aggregate was higher for curing at a relative humidity of 99% (17% higher than underwater curing) compared to the other two methods. Curing of aggregate at 65% relative humidity yielded a crushing strength lower than underwater curing by around 26%. ... Download : Download full-size image; Fig. 17.
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Incorporating coarse and fine recycled aggregates into
2023.11.6 As an example, the compressive strength experiences a relatively modest decrease (approximately 10%) when the replacement ratios reach 30% of coarse aggregate and 20% for fine aggregate. In addition, tensile strength witnesses a reduction of 5% to 15% when replacing 50% of coarse aggregate, and up to 35% when substituting 50% of fine
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Properties of concrete containing strengthened crushed brick aggregate ...
2020.6.30 According to the British method for designing the concrete mixes, all the concrete mixtures were designed with 0.48 w/c ratio. To achieve 30 MPa compressive strength at 28 days, five concrete mixtures were designed based on the coarse aggregate type, which are (i) specimens type NAC were prepared using only NA; (ii) specimens
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Study on the stress–strain full curve of recycled coarse aggregate ...
2023.1.11 The study of stress–strain full curves of recycled coarse aggregate concrete (RCAC) with different substitution rates at C25 and C35 strength grades is lacking, which is the basic theory for design and simulation. Therefore, this ignored problem was studied through experiment, theoretical analysis and simulation.
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Experiment on Size Effect and Fractal
2021.10.16 As displayed in Figure 6, with the decrease of particle size, the particle crushing strength of recycled brick increases from the initial 1.371 MPa to 2.916 MPa, and the particle crushing strength of recycled
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Fly Ash Utilization in Lightweight Aggregates for Sustainable ...
2018.12.31 2.2 Mix Proportions. For the production of lightweight concrete, the traditional coarse aggregate was partially replaced with LDA (pellets) and fly ash aggregates at 10, 20, 30, 40, and 50%. The 7th and 28th-day compressive strength of the cubes cast with this concrete was found out for different replacement percentage as mentioned above.
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Buildings Free Full-Text Effect of Crushing Method on the ...
2023.8.31 Construction and Demolition Waste (CDW) is generated around the world and its quantity will increase in the future. Recycling has become the favored method of dealing with concrete waste but, to avoid its downcycling, it is important to develop a recycling process which is able to produce high-grade recycled concrete aggregates
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Mechanical and Durability Properties of Concrete with Coarse
The search for more sustainable construction materials, capable of complying with quality standards and current innovation policies, aimed at saving natural resources and reducing global pollution, is one of the greatest present societal challenges. In this study, an innovative recycled aggregate concrete (RAC) is designed and produced based on the
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Properties of Recycled Aggregate Concrete SpringerLink
2018.6.17 4.2.1.3 Influence of Strength of Parent Concrete. The strength of parent concrete, the size of natural aggregates used in the parent concrete, and the crushing stages intensely affect the properties of recycled aggregates (Akbarnezhad et al. 2013).The amount of adhered mortar on recycled aggregate and hence the water absorption mainly
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Comparison of Shape Parameters and Laboratory Performance of Coarse ...
2017.8.28 The aggregate shape properties produced from the different crushing techniques influence the performance properties of the asphalt mixtures. The objective of this study was to classify the ...
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Types of Coarse Aggregate: A Comprehensive Overview
2023.5.29 The surface texture of the cement or bitumen affects how well the aggregate adheres to it. Aggregates that are rough and porous adhere to cement better. It offers concrete strong bonding strength. Coarse aggregate: Uses. Provides volume to concrete: The concrete gains bulk from coarse aggregate, which also lowers the project’s
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Damage evaluation of concrete using iron ore tailings as
2023.3.7 Using iron ore tailings (IOTs) as the main aggregate for concrete will not only save crushed stone mining but will also reduce the environmental impact of IOTs. A discrete element model of concrete with realistic IOTs shape was developed using particle flow coding 3D technique. The accuracy of the numerical model was verified with the
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High-quality coarse aggregate recycling from waste concrete
2020.1.29 This study presents a liberation process for recycling high-quality coarse aggregates from waste concrete by impacting with steel grits. Considering the mortar liberation ratio and specific energy for the liberation process as well as the water absorption and apparent density of the recycled coarse aggregates (RCA), the effects of impact
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Development of artificial one-part geopolymer
2021.9.15 On the other hand, a certain level of such strength is also needed to maintain the integrity of GLAs during crushing and a higher early strength may lead to a higher 28-day aggregate strength, which is desirable for concrete production. Fig. 4 shows the one-day compressive strength of geopolymer pastes. It should be mentioned here
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Effects of coarse aggregate angularity on the ... - ScienceDirect
2018.9.20 This study investigates the effects of the angularity of coarse aggregate on the microstructure of two commonly practiced asphalt mixture gradations (AC-16 and SMA-16) based on the X-ray Computed Tomography (XCT). Three-dimensional angularity was introduced based on the XCT images. Four indicators including average contact point
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An investigation of the relationship between Los Angeles
2017.12.20 Pan T, Tutumluer E (2007) Quantification of coarse aggregate surface texture using image analysis. J Test Eval 35(2):177–186. Article Google Scholar Přikryl R (2001) Some microstructural aspects of strength variation in rocks. Int J Rock Mech Min Sci Geomech Abstr 38(5):671–682. Article Google Scholar
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The effect of rock crusher and rock type on the aggregate
2020.1.10 Rajan and Singh [21], [22] studied the influence of the crushing process on the shape properties of coarse and fine basaltic aggregate. For coarse aggregate, two crushing processes were conducted, the first crushing process being formed by JC, CC and vertical shaft impactor (VSI) and the second crushing process, the JC followed by
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Construction and Demolition Waste Aggregates SpringerLink
2012.11.21 The composition of CDW aggregate depends on the type of construction demolition waste used to prepare this type of aggregate. A typical CDW aggregate prepared from normal concrete block contains 65–70 % of coarse and fine sized normal aggregates and 30–35 % of cement paste (Poon et al. 2004a, b).The CDW aggregate prepared from
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Study on the influence of aggregate strength and shape on
2021.8.2 In this study, three different kinds of aggregate were used: Limestone, Diabase, and Granite. Tests were conducted to find the properties of coarse aggregate and fine aggregate for the selection of material according to “Test Methods of Aggregates for Highway Engineering (JTG E42-2005)” [37].Crushing Value (C.V) and Los-Angeles
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Mechanical, Physico-Chemical and Morphological
2022.4.24 The specimens comprising of EOF steel slag as a coarse aggregate exhibited a significant improvement in compressive strength, compared to the specimens comprising of a natural coarse aggregate at the same water–cement ratio. This is attributed to rough surface roughness, which promotes good adhesion between EOF steel slag the
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Influence of service time of recycled coarse aggregate on the ...
2019.9.4 2.1.3 Recycled coarse aggregates. RACs selected in the study were gathered from three sources. One source was the 1-year-old laboratory waste concrete (collected from tested full-scale RC beams) with a w/c value of 0.45 and with a 150 mm 3 cubic compressive strength f cu150 of 37.5 MPa (called as RCA1). The other two
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Influence of coarse coal gangue aggregates on
2023.1.1 The natural Coarse Aggregate (CA) was replaced by Coarse Coal Gangue Aggregate (CCGA) at 0 %, 25 %, 50 %, 75 % and 100 % by weight of coarse aggregate and cement was replaced by Nano-Silica (NS) at 0 %, 2 %, and 3 % by weight of cement. ... This is due to the lack of crushing strength of CCGA. CCGA showed brittle failure. ...
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Properties of recycled aggregate and recycled aggregate
2018.1.27 In the present investigation, an attempt was made to study the influence of the strength of parent concrete on the properties of recycled aggregates and recycled aggregate concrete. In this study, four grades of normal concrete mixes: M20, M25, M30, and M40 were considered as parent concrete to produce the recycled coarse aggregates
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