02.10.2018The present work documents the microscale behavior of granite coarse aggregates and its influence on strength parameters of concrete, exposed to different temperatures ranging from 425 to 850 degrees C (797 to 1562 degrees F) for an exposure time of 2 to 4 hours. Factors leading to decomposition of coarse aggregates in concrete under thermal loads were
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02.05.2017Effect of Size. The grading or size distribution of aggregate has a considerable effect on the properties of concrete as it determines the paste requirement for workability of concrete. The paste also affects the cost of the
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Feb 04, 2020The marble and granite industries in Egypt produce a vast amount of by-product slurry waste that could be used in green mortar production suitable for construction purposes. This research highlights the effect of the chemical constituents of marble and granite waste powders on the compressive strength of the green concrete produced. A chemical analysis of
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2.1.3. Coarse Aggregate Broken granite stones were used as a coarse aggregate in concrete. Size of the coarse aggregate used in the investigation was 10 -20 mm. The specific gravity of the coarse aggregate was found to be 2.68. 2.1.4. Water Water is an important ingredient of the concrete as it actually participates in the chemical reaction
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The test results showed clearly that granite powder of marginal quantity, used as partial sand replacement, has beneficial effects on the compressive strength and split tensile strength, modulus of elasticity. The highest compressive strength was achieved in samples containing 25% granite powder.
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Types of Aggregates and Applications lt Technical information lt Aggregates Granite aggregates Granite aggregates are crushed hard rock of granular structure . crushed granite fine in concrete for building . crushed granite fine in concrete for building concrete with crushed stone fine aggregate increases up to Use of Crushed Granite Fine as Replacement to River .
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Granite, for example, is far stronger than limestone. Therefore, it is a common aggregate used by contractors. Water absorption of Coarse Aggregate Aggregate absorption is the water it soaks up in the concrete batch. Dry aggregates suck up any
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aggregate and any changes in coarse aggregate type can affect its strength and fracture properties. The paper examined the impact of coarse aggregates on compressive strength of concrete. Slump and compaction factor tests were conducted on the mixture of quartzite and crushed granite course aggregates, and quarry dust (fine aggregate).
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K. Chairanjeevi Reddy "Experimental study on concrete with waste granite powder as an admixture" (June 2015), Granite fines are used as a filler material in the concrete, replacing the fine aggregate which will help in filling up the pores in the concrete. Filling up of the pores by granite fines increase the strength of the
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granite aggregate is 35Mpa [7]. The concrete strength of combine aggregate 10mm and 5mm size can achieve 160Mpa at the age of 28 days [3]. The compressive strength of concrete cubes aggregate size 20mm and 10mm on the 7th days are 25.5Mpa and 16.9Mpa. Comparison percentage is 47.6%. Density concrete aggregate size 20mm and 10mm are 2368
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EFFECTS OF AGGREGATE SIZES ON THE CONCRETE STRENGTH ABSTRACT In the sense that the materials involved in this project were capital intensive more especially cement, so in carrying out the work one must have to be careful in the selection and collection of materials to be used in the casting of the concrete.
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concrete is weakened through the leaching of lime in cement paste. This eventually leads to cracking on the concrete surface. The deterioration of concrete reduces the effectiveness of concrete as protective cover for steel reinforcement. The steel reinforcement will be corroded, leading to spallation of concrete [2].
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Jun 14, 2022The use of basalt aggregate reduced the plasticity of the concrete mix. However, the greatest reduction in plasticity was observed after the use of granite aggregate. Comparing the cone fall obtained for the GC1 and GC2 concrete series, it was found that with an increasing amount of aggregate in the concrete mix, its consistency became less
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2021-05-01The published results also show that granite aggregates produce concrete with higher strength than marble aggregates [12]. In addition, previous studies revealed that aggregate type has larger impact on the compressive strength of high-strength concretes than that of the normal-strength concretes [13].
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Bonding between Aggregates and Cement Pastes in Concrete 354 Fig. 1 Stress-strain relations for cement paste, aggregate and concrete [7]. 2.2 Preparation of Specimens Aggregate cubes 100 mm 100 mm 100 mm of limestone and granite were prepared for "pull a part" test. A 20 20 cross section aggregate prisms were cut
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One of the most important purposes of this project is to compare the strength of concrete made with granite of different sizes eg 20, 15, 10 and 5mm. These same types of concrete are made under the same mix proportion. Another purpose also is to know the compressive strength of concrete at different ages.
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14.06.2022It was assumed to obtain concrete with a very high strength without the addition of fibers and without special curing conditions, ensuring the required workability of the concrete mix corresponding to the consistency of class S3. The reference concrete mix was modified by replacing sand with granite and basalt aggregate in the same fractions.
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14 and 28 days. The test results indicate that the replacement of coarse aggregate by granite waste has beneficial effect on the mechanical properties such as compressive strength, split tensile strength and flexural strength of concrete. Keyword –Granite Waste, Coarse Aggregate, Light weight aggregate, Igneous Rock, Split Tensile Strength 1
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Generally, aggregate properties affect not only the concrete mixture proportions but also the behavior of fresh and hardened concrete. Due to considerable overlap between the two, it is more appropriate to divide the study of aggregate properties into three categories that are based on microstructural and processing factors.
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2020-09-01Sieve analysis, specific gravity, moisture content, Aggregate Crushing Value (ACV) and Aggregate Impact Value (AIV) of the granites were determined. The aggregates were used to produce concrete of
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face area of the aggregate are important factors in fixing the asphalt requirement. Sur-face area is a function of aggregate size and size range. The larger the aggregate size, the smaller is the surface area for a given weight or volume of aggregate. In dense-graded aggregates, the major portion of the surface area occurs in the fine ag-
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An experimental study on high-performance concrete made with granite powder as fine aggregate and partial replacement of cement with admixtures subjected to water curing was carried out. The percentage of granite powder added by weight was 0, 25, 50, 75 and 100% as a replacement of the sand used in concrete and cement was partially replaced with 75% silica
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To understand the role played by aggregate in the performance of concrete, it is necessary to de fine specific aggregate properties and show their effect on concrete properties. CHAPTER 3—AGGREGATE PROPERTIES AND TEST METHODS 3.1—Grading 3.1.1 Definition and test method—Grading refers to the distribution of particle sizes present in an
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phyllites; granites and grano-diorites; granite and grano-diorite gneisses. The list is not all inclusive, and many aggregates listed will perform adequately in concrete that contains more than enough alkali to promote ASR. Fine and coarse aggregate containing more than the following quantities of constituents are considered potentially reactive
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The maximum size of a well-graded coarse aggregate of a given mineralogy can have two opposing effects on the strength of normal concrete. With the same cement content and consistency, concrete mixtures containing larger aggregate particles require less mixing water than those containing smaller aggregate. Granite, gabbro, gneiss
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order to investigate the effects of maximum size aggregates in the behavior of concrete. The work was divided into two phases: Phase 1. Determine the correlation between the accelerated and 14-day normally cured strength. Phase 2. Investigate the effects of maximum size aggregates on the strength of normal and superplasticized concrete under
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The results indicated that, aggregate type has a minor effect on the concrete resistance to fire. However dolomite aggregates provided the highest resistance to fire while natural aggregate gave the least resistance. The incorporation of polypropylene fibres improved the indirect tensile strength results as well as the
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The results showed that the recycled coarse aggregates had poor mechanical and physical properties. Aggregate Impact Value, Aggregate Crushing Value, Compressive strength were lowered with an increase in recycle aggregate content. The recycled coarse aggregates (RCA) had little influence on the hardened density of concrete and an increase in
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Oct 02, 2018The present work documents the microscale behavior of granite coarse aggregates and its influence on strength parameters of concrete, exposed to different temperatures ranging from 425 to 850 degrees C (797 to
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04.02.2020The experiment was based on replacing the same proportions of sand and cement in the green concrete mixes with each of granite and marble waste powders after dissolving it in the water content. The study revealed that by replacing 5% of cement in (NC5) mix, 10% of sand in (NF10) mix, as well as 5% of cement and 10% of sand in (NC5 + NF10) mix, by granite
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ADVERTISEMENTS: In addition to the petro-logical (rock structure etc.) character of aggregate, its external characteristics also are of importance which have marked influence on the properties of concrete. Following characteristics are of importance: 1. Shape and texture of particle. ADVERTISEMENTS: 2. Crushing strength of aggregate. 1. Shape of Particles: The shape of
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20.07.2022Concrete with either quartzite or limestone aggregates shows similar behavior and keeps only 35% of its strength at 650 C. Nonetheless, at the same elevated temperature using granite aggregates proved to retain about 54% of the concrete's strength. In addition, the granite concrete had less degradation at every temperature. These results
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03.07.2017The project has some aims of verification. One of the most important purposes of this project is to compare the strength of concrete made with granite of different sizes eg 20, 15, 10 and 5mm. These same types of concrete are made under the same mix proportion. Another purpose also is to know the compressive strength of concrete at different ages.
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again but with granite coarse aggregate. The mixtures in Program II Set 2 had a w/cm of 0.44 and a paste content of 24.1% (by volume). The concrete in both sets was cured for 7 or 14 days. In Program III, the effect of incorporating a porous limestone coarse aggregate with slag cement was inves-tigated using comparisons with slag mixtures cast with
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Kumar et al. (2015) investigated the use of granite waste as partial substitute to cement in concrete. The granite slurry was used as partial substitute in proportions ranging from 5% to 20% by weight of cement in concrete. The comprehensive strength, tensile strength and flextural strength were tested.
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the laa abrasion test, used to measure the aggregates' resistance to abrasion and impact, produced an adequate result for the marble, but a slightly higher than average percentage loss in the granite. 4.4.2 fresh concrete results table 3 fresh test results slump (cm) unit weight (kg/m3) air content control mix 2.5 2417 2.4% 20% marble 2.5
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aggregate. The effect of using crushed quartzite, crushed granite, limestone and marble as coarse aggregate on the mechanical properties of high-performance concrete as indicated by Wu, Chen, Yao, and Zhang (2007) in their study were that the strength, stiffness and fracture energy of concrete for a given water/cement ratio depend on the type of aggregate. zturan,
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Aggregates constitute 60 – 80% of total concrete constituents. The characteristics of concrete may be affected by the sources from which the aggregate was obtained. The effects of granite sourced from four selected locations within Ogbomoso, Nigeria; on the fresh and hardened properties of concrete were investigated. The granites were obtained from: Asafa (80 4.681 N
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Size 20mm should also be used in the reinforced concrete columns and construction work under water and soil. Moreover, it is suitable for use in the construction of piers. It can be used where the ultimate moment of resistance is very high. Complete Material Available Effects Of Aggregate Sizes On The Concrete Strength
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Format: ms-word (doc) Pages: 65; Chapter 1 to 5; With abstract reference and questionnaire; Preview abstract and chapter 1 below ₦ 3,000
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