Effect of nanosilica and fiber on mechanical properties and
The maximum particle size of the river sand was 4.75 mm, and the river sand fineness modulus was 2.52. Natural coarse aggregate is prepared as continuous graded natural coarse aggregate with a mass ratio of 3:7 between particle size 5–10 mm and particle size 10–30 mm. The crush index of natural aggregate is 5.4%.
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The effect of using seashells as cementitious bio-material …
However, the curve for natural sand was seen to be slightly finer than that of crushed GW. Both materials were seen to meet the nominal aggregate size range for use as fine aggregate in concrete, according to EN 1097-6 [52]. The fineness modulus of natural sand and GW sand were 2.33 and 2.68, respectively.
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Effect of sand-to-aggregate volume ratio on mechanical …
SUMMARY This study aims to investigate the effect of maximum aggregate size (d max) on the mechanical properties of high-strength concrete (HSC). ... Sand-to-aggregate ratios were 0.36, 0.40, and ...
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Influence of Aggregate Type and Size on Ductility and Mechanical …
In this study, several variables were investigated in the production of ECC: 1) three different types of sand (microsilica sand, crushed dolomitic limestone sand, and gravel sand); 2) three different maximum nominal sizes of sand (200 µm [0.008 in.] for the microsilica sand, and 1.19 and 2.38 mm [0.047 and 0.094 in.] for the crushed dolomitic ...
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Aggregates for Concrete as per American Standards – ASTM …
The aggregates are broadly classified into two types based on the size, namely- fine aggregate and coarse aggregate. In this article, we discuss the properties of the standard aggregates …
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Mesoscopic investigation of the matrix pores and ITZ effects …
In this study, the matrix pores and ITZ effects on the mechanical properties of seawater sea-sand coral aggregate concrete (SSCAC) were investigated via the meso-element equivalent method. The effective modulus and strength of aggregate and matrix in SSCAC at different scale level were derived via the Voigt model and Mori-Tanaka method.
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Alternative concrete aggregates
Concrete is one of the most widely used construction materials, yet its production is associated with significant environmental impacts. One approach …
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SIZE EFFECT OF AGGREGATE IN THE MECHANICAL …
Coarse aggregate size 19 mm, 25 mm, and 37.5 mm gave average compressive strength of 20.17 N/mm2, 22.97 N/mm2 and 23.13N/mm2 respectively. (3) Flexural strength of concrete beam is inversely affected by the increase in coarse aggregate size Coarse aggregate size 19 mm, 25 mm, and 37.5 mm gave
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Mechanical properties and microstructural characteristics of …
The interfacial transition zone (ITZ) between the internal aggregate of concrete and the cement paste is the weak link of concrete. In order to explore the relationship between the macro- and meso-mechanical properties and the micro-structural characteristics of concrete, the interfacial strength of coral aggregate concrete (CAC) was measured by bond strength …
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Effect of water to binder ratio and sand to binder ratio on …
Silica sand was used as aggregate. Particle size distributions of cement, slag and silica sand measured by Laser Particle Size Analyzer are give in Fig. 2. Particle size of silica fume and cenosphere cannot be accurately determined by laser particle size analysis method, thus, the particle size of these material is observed by SEM.
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Study of the influence of aggregate size distribution on mechanical
The purpose of the present study is to investigate the influence of the aggregate size on the mechanical properties of concrete under uniaxial compression and three-point-bending using AE technique. 2. Experimental details2.1. ... The fine aggregate used was natural sand, whose fineness modulus was 2.85 and the maximum size was less than 5 mm. ...
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Experimental Study of the Mechanical Properties of Mortar …
For the mechanical characterization of the specimens, tensile flexural tests and compressive tests were were conducted at ages of 3, 7, 14, and 28 days. ... sand, and coarse aggregate in construction ... Chile has a vast market of seashells; for example, in the year …
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Influence of coarse aggregate size and content on the …
In addition, the smaller size range aggregate concrete mixes of 15%, 30%, and 45% RCA replacements show higher UPV values which are larger by 1.054 times than the 12–20 mm size aggregate concrete of the corresponding concentration in the mixes.
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Aggregates MCQ [Free PDF]
Explanation: Crushing test: This test is carried out to assess the strength of coarse aggregate when a compressive load is gradually applied. The test is carried out as follows: 1. The sample is broken into chips passing a 12.5 mm I.S. sieve and retained on a 10 mm I.S. sieve. 2. The material is heated to a temperature of 100°C to 110°C and it is then cooled to make it off …
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Inspection & Sampling Procedures for Fine & Coarse …
Reducing a Sample to Test Size Mechanical Splitter Sand Splitter Miniature Stockpile Quartering Size of Test Sample (After Splitting) 9/1/13 CHAPTER FOUR - TESTING ... T 248 Reducing Field Samples of Aggregate to Testing Size T 304 Uncompacted Void Content of Fine Aggregate ASTM Test Methods D 4791 Flat Particles, Elongated Particles, or Flat ...
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Research on influence laws of aggregate sizes on pore …
The differences in mortar aggregate gradation are manifested in aspects such as aggregate size and distribution [7], particle shape [8], particle roughness [9], and aggregate density [10], and so on.Main influencing mechanisms on pore structure are filling effect [11] particle arrangement [12] and ITZ formation [13].Generally speaking, fine aggregates will fill …
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Investigation on the sustainable use of different sizes of …
Oyedepo et al. [35] evaluated the use of SD as a substitute for 0, 25, 50, 75, and 100 % of natural fine aggregate in normal-weight concrete and discovered that amounts greater than 25 % of sand replacement had a negative impact on the concrete's mechanical strength and density parameters. Several other researchers observed similar outcomes ...
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Shear strength of aggregates compared with bulk soil of …
Shear strength of aggregates and the bulk soil matrix in two Haploxeroll of central Chile was assessed in order to determine: (1) the effect of previous tillage on shear parameters between …
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Selecting the Right Aggregate Washing & …
Material is slurried and fed into the front end of this machine. The sand is then separated by size and specific gravity; coarse sand falls at the feed end, fines fall at the end, and silt overflows the side of the tank and into a …
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Reducing Samples of Aggregate to Testing Size
Canadian Council of Independent Laboratories August 2019 Reducing Samples of Aggregate to Testing Size ASTM C702/C702M - 18 Page 4 of 4 12. Procedure 12.1 Place the original sample of damp fine aggregate on a hard clean, level surface where there will be
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Effects of carbon nanotube dosage and aggregate size …
Cemented rockfill is composed of waste rock aggregate, cement paste and pores [11].Against its material composition and internal structure, various methods have been developed to improve its mechanical property [12].The first category is achieved by strengthening the matrix performance of cemented rockfill [13].It includes enhancing the bonding property of cement …
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Eco-friendly strain-hardening cementitious composites
Eco-friendly strain-hardening cementitious composites with recycled PET fine aggregate: Mechanical behavior and environmental benefits. ... QP aggregate PET aggregate; Particle size: 120 μm: 107 μm: Modulus of elasticity: 76 GPa: 4 GPa: Density: 2.68 g/cm 3: ... which is related to the roughness of the aggregate surface. Quartz sand is smooth ...
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AGI3754 Silica 16-30 sand
Garside Sands 16/30 sand OHS61759 FM96927 EMS96928 A dried silica sand to the requirements of BSEN 12904 (see standards tables). Applications Mechanical analysis • Water filtration Sieve size (mm) Specification (% Passing) • Synthetic sports pitches 1.18 100 • Fillers 1.00 95 - 100 • Pet care products. 0.85 60 - 90
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DESIGN AND EXPERIMENTAL STUDY OF AUTOMATIC …
Sieve Shaker for Determining Aggregate Size Distribution of Soils", The West Indian Journal of Engineering, vol. 35, pp.36-42. 7. Stephen Tambari, Dan-orawari G.I, Aziaka D.S & Ayejah Victor, 2015, "Design Analysis of a Reciprocating Cassava Sieving Machine",IOSR Journal of Mechanical and Civil Engineering, vol. 12, pp. 7-15. 8.
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(PDF) Effect of aggregate grain size distribution on properties …
In this study, the effect of aggregate grain size distribution and water/cement (W/C) ratio on the mechanical properties of permeable concrete is investigated.
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Influence of recycled aggregates on long term mechanical properties and
2.3. Specimen preparations. 100 × 100 × 100 mm cubes and 200 × 100 diameter cylinder specimens were cast to determine the compressive strength, splitting tensile strength and the pore structures of the concretes.All specimens were cast in steel molds and compacted using a vibrating table. After casting, the specimens were covered with a plastic sheet, cured in air for …
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Effect of recycled rubber aggregate size on fracture and …
Natural river sand and manufactured sand with a maximum size of 5 mm was used as fine aggregates. For every mixture design, coarse sand was replaced by 20% of manufactured sand by weight. Gravel having nominal sizes of 20 mm and 14 mm were used as coarse aggregates in the mixtures. All aggregate sizes were graded according to AS2758.1 …
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Sand Grain size Chart – Measur Testing Equipment
This grain size comparator card identifies sand granules in six sand grain sizes and shapes ranging from very coarse sand to silt sand. Particles are also designated by shape as angular, sub-angular, sub-rounded and rounded. Granules, pebbles, cobbles, and boulders are indicated by the range of size in millimeters.
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Macro-microscopic mechanical behavior of geogrid …
The effects of geogrid aperture size and tensile resistance on the mechanical behavior of GRCS were further investigated based on the validated DEM model. ... Investigating the hydro-mechanical properties of calcareous sand foundations using distributed fiber optic sensing. Eng. Geol., 295 (2021), Article 106440.
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