Characterization Of Fine Aggregates In Concrete By Different
Thermogravimetric analysis (TGA) for characterization of self
This is due to the fact that the tested fine aggregates (0-2 mm) have a higher paste content than the global concrete [35], resulting in a higher C binder of NRCA than that of typical concrete. Thus, within the typical w/c ratio (0.4-0.5), the potential C unhydrated of NRCA (0-2 mm) can be calculated by Equation (6), which is between 6.2% and ...
Performance of mussel shell as aggregate in plain concrete
Oyster shells have also been studied as a substitute for fine aggregate in concrete [13], [14], ... taking into account the moisture and absorption values of the different aggregate fractions. The different concretes studied are summarized in Table 4. 3 ... The results of the chemical characterization of materials by XRF are shown in Table 5 ...
Physical, chemical and mineralogical properties of fine …
This paper assesses the physical, chemical and mineralogical characteristics of fine recycled aggregates obtained from crushed concrete waste, comparing them with two types of …
Alternative fine aggregates in production of sustainable concrete …
Even if the utilization of alternative fine aggregates started in different countries (US, Japan, UK, Germany, etc) right after Second World War, today, natural sand and gravel (mainly river aggregate but also marine sand, crushed stone and dune sand) are used as main aggregates basically for almost all concrete constructions [105].
Study on mechanical properties and microstructure of recycled fine
In this study, the effects of different contents of Nano-SiO2 (NS) on a slump, compressive strength, splitting tensile strength, flexural strength, hydration products, and microstructure of recycled fine aggregate concrete (RFAC) were investigated. The results show that the addition of recycled fine aggregate (RFA) has a significant negative impact on the …
Microtexture Characterization of Bulk-Aggregate Samples …
Standard test method for resistance of fine aggregate to degradation by abrasion in the micro-Deval apparatus ... Characterization of pavement texture by use of ...
(PDF) Microstructural Characterization of Concrete Prepared …
Finally, the effects of recycled fine aggregate, recycled coarse aggregate, and steel fibers on the shear behavior of the concrete beams were severally quantified by the linear equations, and a ...
Multi-Technique Characterization of a Fine Fraction of …
replacement of concrete crushing aggregate between 15%–60% of the coarse fraction for the manufacture of structural concrete. Not all this waste is recycled, however, for the crushing entailed to produce aggregate of suitable particle size generates fine, <5 mm particle materials, comprising primarily fine aggregates,
Environmental impacts and performance assessment of recycled fine
Natural disasters and human demolition create vast amounts of construction and demolition waste (CDW), with a substantial portion being concrete waste. Managing this concrete waste is a daunting challenge for developing countries with limited resources, aiming to mitigate its harmful environmental effects. Therefore, the proposed approach involves using recycled …
High-strength concrete with different fine aggregate
The effects of shape and texture of fine aggregate were evaluated by comparing the fresh and hardened properties of granite sand concrete (G-530) with the corresponding …
High-strength concrete with different fine aggregate
Alexander and Milne [18] have observed a similar relationship when the source of both fine and coarse aggregates is the same. The influence of fine aggregate source on elastic modulus of concrete is also shown in Fig. 5. At early ages, the evolution of elastic modulus is closely related to texture and shape of fine aggregate, when the paste ...
Characterization of Recycled Aggregate Concrete
2.3 Testing of Concrete Specimens. Each set representing certain concrete mixture consisted of three cylinder specimens of 150 mm diameter and 300 mm height. All the test specimens were caste and cured for 28 days as per guidelines specified in IS 516-1959 [].In order to get the complete load displacement behavior, micro computer controlled electro-hydraulic servo tester …
Physicomechanical Properties and Characterization of Gold …
In this study, GOTs were utilized as partial replacement material (0%, 5%, 10%, 15%, 20%, 25%, and 30% by weight) to fine aggregates such as river sand (RS) and low calcium fly ash (FA) as binder material in the manufacture of geopolymer concrete (GPC) along with recycled coarse aggregates.
Mechanical characterization of cement mortars and concrete …
Specifically, the following concrete mixes were produced: a fine only mix (FO) replacing a 25% of natural sand by fine CMWGs provided by both GIG and SUBTERRA (one mix with each aggregate), as also defined in Table 3; a coarse only mix (CO) in which a 25% of volume of raw gravel was replaced by coarse CMWGs from GIG, SUBTERRA and …
Characterization of fine aggregates in concrete by different
In this study, different types of fine aggregate used in concrete, namely river sand and crushed limestone, are selected for morphological characterization. Traditional sieve …
Characterization of Materials
The characterization of the raw materials is essential to verify their suitability in concrete preparation and further application in structural member. ... Pareek V (1993) Behaviour of concrete with different proportions of natural and recycled aggregates. Resour Conserv Recycl 9:109–126 ... Mechanical behaviour of concrete made with fine ...
Quality characteristics of fine aggregates and controlling …
The aim of this study was to identify which fine aggregate characteristics are important, and additionally to relate the extent of the effect that the aggregate has on the concrete as …
materials The Chemical-Mineralogical Characterization of Recycled
The incorporation of a recycled concrete aggregate (RCA) as a replacement of natural aggregates (NA) in road construction has been the subject of recent research.
3D identification and characterization of force chains in …
Asphalt concrete covering most roadways worldwide is a typical particle reinforced composite, in which coarse aggregates dispersed in the asphalt mortar matrix containing fine aggregates and mineral fillers constitute a skeleton structure [1], [2].The aggregate skeleton serves as the main bearing body of external forces applied to asphalt concrete and …
Pore characterization of manufactured aggregates: recycled concrete
Accurate characterization of aggregates plays an important role in mixture proportioning of concrete mixes. Decisions made during the concrete design phase in terms of characterization techniques adopted for quantification of specific gravity or water absorption affect the development of fresh properties during the construction phase as well as impacting the …
Fine Aggregate: Types, Classification and Role in …
Understanding the types, classifications, and roles of fine aggregate is fundamental for engineers and construction professionals to optimize concrete mix design for specific structural requirements, ensuring longevity and …
Microstructural Characterization of Concrete Prepared with …
2017. This study investigates the potential of using crushed concrete as aggregates to produce green and sustainable concrete. Crushed concrete was sieved to powder fine recycled aggregate (PFRA) less than 80 µm and coarse recycled aggregates (CRA).
Delft University of Technology Multi-level chemical …
an urgent need for alternative materials for natural sand in new concrete in order to make it circular. Furthermore, the recyclers have raised questions regarding upscaling and the potential of fine recycled concrete aggregates (fRCA) in structural concrete elements since the availability of recycled construction rubble is increasing.
Microstructural Characterization of Concrete …
2017. This study investigates the potential of using crushed concrete as aggregates to produce green and sustainable concrete. Crushed concrete was sieved to powder fine recycled aggregate (PFRA) less than 80 µm and coarse …
Experimental investigation of concrete incorporating recycled concrete …
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 examined recycled coarse …
Microscale investigation of mechanical characteristics: …
This paper explores the feasibility of using recycled fine aggregate in concrete to meet strength requirements for various applications in sustainable construction. The physical and mechanical characteristics including: aggregate strength, gradation, absorption, specific gravity, shape and texture, play crucial roles in determining concrete strength. The …
Physical, chemical and mineralogical characterization of Dutch fine
In circular concrete design, beside cement replacement with more environmentally friendly cement types, there is also an urgent need for sand replacement with fine recycled concrete aggregates (fRCA).
Physico-Mechanical Characterization of Cement Concrete …
Concrete is used as a construction material because of its availability, durability and moldability [].It is composed of binding material, fine and coarse aggregates, and water [].Fine and coarse aggregates make up a significant portion, typically between 60 and 75% of the concrete's volume (70–85% by mass) and have a substantial impact on both the freshly mixed …
Effect of Different Fine Aggregate Characteristics on Fracture
In order to study the effect of fine aggregate characteristics on the fracture toughness of sand concrete, aggregates with different fineness modulus, FAA and aggregate …
(PDF) Recycled aggregates in concrete production: …
Recycled aggregates and particularly, recycled concrete aggregate substantially affect the properties and mix design of concrete both at fresh and hardened states since it is known by high ...
Preparation and characterization of novel phase-change concrete …
PO 42.5 cement, fine sand, and coarse aggregate are used to prepare phase-change concrete. The mixing ratio of concrete was calculated according to the "Specification for mix proportion design of ordinary concrete" [27]. The mass ratio of PO 42.5 cement, fine sand, coarse aggregate, and water is 19.6 %: 27.6 %: 43.2 %: 9.6 %.
Alternative fine aggregates in production of sustainable concrete …
The results show that the morphology of fine aggregates is properly characterized by these three parameters as the characterization techniques returned different sphericity, roundness, and fractal ...
SHAPE ANALYSIS OF FINE AGGREGATES USED FOR …
Shape characteristics of fine aggregates with different origins but in similar size ranges are revealed by this study. Compared with coarse aggregate, fine grains of different origins …
(PDF) THE NEED FOR STANDARDIZATION OF AGGREGATES FOR CONCRETE
Aggregates, both fine and coarse, take about 65%-75% by the volume of concrete and are important ingredients in concrete production [4]. Among concrete ingredients, cement is the most expensive ...
(PDF) Comprehensive Characterization of …
As a reason, further research is necessary to determine the impact of replacing conventional fine aggregate with ferrochrome slag on the various mechanical and durability properties of concrete.
Characteristics of Aggregates: Shape, Size & Specific Gravity
The Specific Gravity of Fine Aggregate Test. ASTM C128 and AASHTO T 84) is a comparison of sample masses in oven-dry, saturated surface-dry (SSD), and immersed conditions.This test method offers alternate procedures to determine specific gravity. Either a volumetric flask or a simple pycnometer can be used for the gravimetric procedure. For the volumetric procedure, a …
Physical, chemical and mineralogical characterization of Dutch fine
These are comparable to cement paste contents 16.1 wt.% and 24.6 wt.% for recycled coarse and fine concrete aggregates, respectively [4]. The cement paste concentrates in the finer fraction (0–0.250 mm), in ... Based on XRD characterization of different fRCA, it was found that they are mainly made up by crystalline phases (>70 wt.%), notably ...
Incorporating coarse and fine recycled aggregates into concrete …
Materials and reagents. The application of recycled concrete aggregates (RCA) serves as a widely embraced method on behalf of repurposing concrete waste, aligning well with the principles of sustainable development [].The primary objective of the experimental program is to assess the feasibility of substituting coarse and fine natural aggregates (CNA and FNA) with …