Dielectric material characterization of concrete in GHz …

Hence, the real part of the permittivity of concrete is strongly influenced by the mixture composition, i.e., coarse vs. fine aggregates, cement paste, w/b etc., which mainly determines the porosity of the material, the internal distribution of the different phases, and most importantly the physical state of the water.

Characterization of fiber reinforced self-compacting concrete …

Blended concrete characterization. Characteristics of entire concretes configuration synthesized by different materials in the same conditions were analyzed by the subsequent processes and routine of blended concrete was discussed below. 4.2.1. Morphological investigation of blended concrete

(PDF) Material Characterization and Optimum …

CBA was replaced in concrete by four different combination arrangements between half (50%) and full () coarse and fine aggregate using the volume replacement method.

Characterization of Recycled Asphalt Pavement as Aggregate for Concrete

Title: Characterization of Recycled Asphalt Pavement as Aggregate for Concrete Author(s): Andrea Filippi, Maddalena Carsana, Federica Lollini, Elena Redaelli Publication: Symposium Paper Volume: 355 Issue: Appears on pages(s): 245-262 Keywords: recycled aggregate; concrete; RAP; circular economy DOI: 10.14359/51736031 Date: 7/1/2022 …

Quality characteristics of fine aggregates and controlling …

For the aggregate producer, the concrete aggregates are end products, while, for the concrete manufacturer, the aggregates are raw materials to be used for mix designs and successful …

Shape analysis of fine aggregates used for concrete

Crushed rock sand (CRS), industrial by-products (IBP) and recycled fine aggregates (RFA) are different types of alternative fine aggregates. The economic, sustainability and social benefits ...

SHAPE ANALYSIS OF FINE AGGREGATES USED FOR …

General PSDs of different types of fine aggre-gates by the sieve test. Optical microscopy is firstly used for the general morphological characterization of two fine aggregates. This observation can give the first impression of the size and shape of two materials. Example images of the two types of fine aggregate are shown in Fig. 2.

High-strain rate compressive behavior of concrete with two different …

Eight different concrete mixes characterized by different substitution levels of the two types of plastic aggregates are considered in this study. Two different substitutions are considered: only PET powder substitution of fine aggregates (PET) and simultaneous substitution of PET powder and mix-plastic granules of fine and coarse aggregates (MIX).

Characterization and evaluation of morphological features for aggregate

By combining different parameters at different levels, characterization systems of irregular ... energy X-ray tomography of a fine-aggregate matrix. ... aggregate concrete has wide potentials in ...

Performance evaluation of reclaimed asphalt pavement (RAP) aggregate …

3.1 Workability. The workability of concrete is important to allow the placing and compacting of concrete into the formwork [].The workability of concrete marginally decreased when RAP aggregates are added [].This decrease is due to the asphalt covering on the aggregate and RAP aggregate texture [].Additionally, the presence of a dust layer …

Physical, chemical and mineralogical characterization of Dutch fine

T1 - Physical, chemical and mineralogical characterization of Dutch fine recycled concrete aggregates. T2 - A comparative study. AU - Nedeljković, Marija. AU - Visser, Jeanette. AU - Nijland, Timo G. AU - Valcke, Siska. AU - Schlangen, Erik. PY - 2021. Y1 - 2021

Strength characterization and sustainability assessment of …

Coal bottom ash (CBA) which is waste and environment contaminant has been used in grinded and raw form as replacement of Portland cement (PC) and natural fine aggregates (NFA) in concrete. The combined effect of grinding period (GP) (2–10 h), grinded CBA (GCBA) (10–30%), and raw CBA (0–50%) on strength and microstructural characteristics …

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 ...

(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) Concrete Hollow Block Production Using Fine Aggregates …

3.1 Characterization of Fine Aggregates . ... The experimental program in this investigation focused on studying the properties of concrete containing different percentages of Plastic Wastes ...

Microscopic characterization of alkali-silica reaction (ASR) …

All the RCA particles and RCA concrete specimens (100 mm by 200 mm cylinders) were produced in the laboratory. Four different types of RCA were manufactured: 1 and 2) RCA made from a highly reactive coarse aggregate (i.e. Springhill) at slightly damaged (i.e. 0.05%) and severely damaged (i.e. 0.30%) degrees, and 3 and 4) RCA made from a highly reactive …

SHAPE ANALYSIS OF FINE AGGREGATES USED FOR CONCRETE …

Fine aggregate is one of the essential components in concrete and significantly influences the material properties. As parts of natures, physical characteristics of fine aggregate are highly relevant to its behaviors in concrete. The most of previous studies are mainly focused on the physical properties of coarse aggregate due to the equipment limitations. In this paper, …

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. …

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 …

Characterization and Sustainable Utilization of Steel Slag …

2.2 SS Waste Characterization Methods and Parameters Analyzed 2.2.1 Sample Preparation. The collected SS waste sieve analysis was performed after collecting samples directly from steel plants, without any processing. After sieve analysis, it was noted that SS waste fractions were of various sizes ranging from 40 to 10 mm, and nearly 90% of aggregates were …

Use of Textile Mill Sludge in Concrete for Waste Characterization …

The variation of compressive strength of concrete with different replacement levels of TMS with fine aggregates for 0.5% of plasticizer by the weight of cement. It can be observed that there is slight increase in compressive strength of concrete up to 25% of TMS.

Recycled Coarse Aggregates in Concrete: A Comprehensive …

2.1 Materials. The primary binding agent utilized in this investigation is Ordinary Portland Cement (OPC) of Grade 43, adhering to the specifications of IS 269 – 2015 (IS:269 2015).Table 1 delineates the properties of the OPC as determined through various tests. Fine aggregates consist of river sand with a maximum size of 4.75 mm, conforming to IS 383 – …

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 …

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 …

Physical Characterization of Dutch Fine Recycled Concrete Aggregates…

A type of IFW from a local machine workshop was used to replace the conventional fine aggregate, fine natural sand (FNS), at percentages of 25%, 50% 75%, and by the weight of FNS of the size ...

Chapter 10 Sand: The Fine Aggregate

Mechanical characterization of high performance concrete …

The role of 0–2 mm fine recycled concrete aggregate on the compressive and splitting tensile strengths of recycled concrete aggregate concrete. ... Influence of the use of recycled concrete aggregates from different source on structural concrete. Constr. Build. ... chemical and mineralogical characterization of fine aggregates from ...

CHARACTERIZATION OF FINE AGGREGATES IN …

SHAPE ANALYSIS OF FINE AGGREGATES USED FOR …

General PSDs of different types of fine aggre-gates by the sieve test. Optical microscopy is firstly used for the general morphological characterization of two fine aggregates. This …

Use of fine recycled concrete aggregates in concrete: A …

The reported WA values for natural fine aggregate vary between 0.15 and 4.1%, with an average of 1.1%. In addition, the fRCA has lower density than natural sand, (Fig. 8). …