Barite powder as sand substitution in concrete: Effect on …
Barite (BaSO 4) is a mineral commonly used as aggregates to produce heavyweight concrete.The applications concern radiations shielding in hospitals and nuclear facilities. In this work, the use of Tunisian barite powder form in the composition of concrete was investigated, substituting sand partially or totally.
Simulation and optimization of gamma-ray linear …
Akkurt et al. [16] reported that the increment in barite aggregate which is a heavy aggregate determining the density of mixture has an importance on the design of satisfactory concrete shields against gamma rays. Although the highest density-concrete produced by use of heavy aggregates is generally desired in terms of shielding capability [17], it is known that an …
Evaluation of technical and gamma radiation shielding …
This study proposed to use barite-enhanced ultra-high performance geopolymer concrete (UHPGC) as the composite matrix to develop high-strength, cement-free, and sustainable radiation shielding materials. The physical properties, γ ray attenuation capacity, microstructure, and environmental and economic impacts of prepared barite-enhanced …
Recent developments of radiation shielding concrete in …
High-performance heavy density concrete with fine magnetite aggregate increases the effectiveness of γ-rays shielding, notably for 137Cs at a photon energy of 0.662 MeV and 60Co at two photon energies of 1.173 and 1.333 MeV. ... in the case of barite blended concrete composite, the µ value was 0.1 cm −1. According to the findings of this ...
Investigation of usability of limonite aggregate in heavy …
Heavy-weight concrete refers to the concrete with unit weight ≥ 2600 kg/m 3, which is produced using high-density (specific gravity ≥ 3.0) aggregates, such as barite, magnetite, hematite ...
Barite : Properties, Formation, Uses and Mining Localities
Cement Additive: In some cement formulations, barite is used as a mineral additive to increase density and improve drilling performance in oil well cementing. 10. Radiation Shielding: – Due to its high density and ability to absorb X-rays and gamma rays, barite is used in the construction of radiation shielding materials in nuclear power ...
Investigation of gamma radiation attenuation in heavy concrete …
Semantic Scholar extracted view of "Investigation of gamma radiation attenuation in heavy concrete shields containing hematite and barite aggregates in multi-layered and mixed forms" by Taban Shams et al. ... The primary objective of this research was to study the transmission of gamma radiation from heavyweight concrete containing barite ...
Weighing In on High-Density Concrete
When designing a concrete mix, there is an entire smorgasbord from which to choose, depending on the application. Engineers usually need just a normal-weight product that will carry a heavy load or to stay put when it's buried, or they may prefer something quite a bit lighter for hoisting large panels into place to create an attractive building facade.
304.3R-20: Heavyweight Concrete: Measuring, Mixing, …
include concrete structures inside and outside the contain-ment system. CHAPTER 2—MATERIALS 2.1—Cement Cements conforming to ASTM C150/C150M, which would be suitable for conventional concrete and produce the required physical properties, are suitable for use in heavy-weight concrete. Low-alkali cement should be used when
Investigation of gamma radiation attenuation in heavy concrete …
Investigation of gamma radiation attenuation in heavy concrete shields containing hematite and barite aggregates in multi-layered and mixed forms. ... Akkurt et al. [20], [21], [22] investigated the effects of the amount of barite, density, water-cement ratio, and corrosion on the LAC of concrete shield. The studies showed that water-cement ...
High Density Concrete: Types and Properties | Concrete Technology
Aggregates to be Used in Shielding High Density Concrete: For making shielding concrete heavy weight aggregate having a specific gravity between 3.5 to 4.0 is needed. There are many aggregates whose specific gravity is more than 3.5 for making a heavy weight concrete. Some of natural commercially used aggregates are as follows: 1. Barite . 2.
The constituents, properties and application of heavyweight concrete…
The conclusion was that the most optimum w/c ratio for fabrication of barite heavy weight concrete is 0.40. 2.2. Cement content. The cement paste is formed when water is added a mix of concrete. The cement paste accomplishes three main functions, namely, binding, coating and lubricating. It binds reinforcing bars, individual aggregates and ...
Experimental Study on Mechanics Performance of
In view of the present situation that the preparation of complex high titanium heavy slag concrete (hereinafter referred to as CHTHSC) by using all coarse aggregate, fine aggregate and ground admixture made of high titanium heavy slag, is in need of experiments and studies in detail, this paper, based on the verification and analysis of structural stability of complex high titanium …
MECHANICAL PROPERTIES OF HEAVY WEIGHT CONCRETE
Density concrete or heavy weight concrete is designed by using heavy weight aggregates such as hematite, magnetite, barite etc. The material is called hematite is used in this special concrete. Integral part of this paper is replacing coarse-aggregate by hematite aggregate partially from 0 to 50% volume at 25% intervals.
Development of high-performance heavy density …
sive strength of concrete containing barite aggregate was very close to M60 concrete and exceeds for 90 days. The results also indicated that, the compressive strength of the high-performance concrete
Experimental, analytical, and simulation studies of modified concrete …
The current study assessed two concrete mixes prepared using dolomite and barite/limonite aggregates to shield against both energetic photons and neutrons. After that, a designed mix which ...
Heavyweight concrete
Typically using barites the density will be in the region of 3,500kg/m 3, which is 45% greater than that of normal concrete, while with magnetite the density will be 3,900kg/m 3, or 60% greater than normal concrete. Very heavy concretes can be achieved with iron or lead shot as aggregate, 5,900kg/m 3 and 8,900kg/m 3 respectively.
Engineering Properties of Heavyweight Concrete—A Review
The evolution of nuclear power into peaceful applications has given rise to an expanding use of heavy weight concrete in construction industries nowadays. Heavyweight …
Effective Parameters in Gamma Radiation Transmission Rate from Heavy
Delnavaz et al. [8] experimentally studied the gamma radiation protection rate of heavy concrete samples containing barite and iron oxide aggregates. Samples with thicknesses of 100, 150, 200, and ...
Investigation of some physical and mechanical properties of concrete …
The experiment results revealed that by substituting Heavy Weight Aggregate (HWA) iron ore and barite mixture for 10% (or higher) of normal aggregates it is possible to obtain a specific weight ...
(PDF) Rheological study of heavy cement grouts with …
Barite (BaSO4) is a mineral commonly used as aggregates to produce heavyweight concrete. The applications concern radiations shielding in hospitals and nuclear facilities.
Preparation and Performance Study of Radiation-Proof Ultra …
High-density aggregates such as magnetite, ilmenite, hematite, and barite are used as aggregates in concrete [18,19,20,21,22,23]. The results show that the gamma-ray-shielding performance of concrete mixed with heavy …
Investigation of usability of limonite aggregate in heavy …
Barite was mostly used in the studies carried out. Among these studies, Esen and Yilmazer (2011) examined the X-ray and radioisotope energy absorption capability of the heavy concrete produced using barite, and observed that the density and the capability to absorb the energy of the concrete with an increasing rate of barite increase.
Properties of heavyweight concrete produced with barite
The barite unit weight of approximately 4000 kg/m 3 found in physical experiments is the desired value for heavyweight concrete production. The compressive strength obtained …
304.3R-20: Heavyweight Concrete: Measuring, Mixing, …
Jacques A. Bertrand. Thomas R. Clapp. *Task Group leader. This document presents recommended methods and procedures for measuring, mixing, transporting, and placing …
Mechanical performance of heavy concrete with barite …
Barite concrete, due to its significantly higher specific gravity and robust structural strength, proves to be an ideal radiation shield for nuclear centers. Any structural anomalies in such critical establishments could potentially trigger catastrophic consequences. Therefore, ensuring durability in nuclear centers assumes paramount importance. This research employs an experimental …
Chapter 19 Radiation Shielding Concrete
cement on the shielding, physical, and mechanical properties of ilmenite concrete, barite concrete, and gravel normal aggregate. He found that silica fume and rice hush ash can increase mechanical properties and durability of concrete but have no obvious effect on the attenuation coefficient (as shown in Fig. 19.1). 19.3.2 Aggregates
Rheological and Mechanical Properties of Heavy Density Concrete …
In this study, barite is used as fine aggregate mixed with Portland cement to design HWC. Different barite concrete mixes were designed, where barite is used once as an addition while maintaining ...
Mechanical performance of heavy concrete with barite …
heavy concrete in the context of acid rain, further research is warranted regarding the performance of heavy concrete containing barite in such conditions. Consequently, this study defines an experimental program to investigate the durability of heavy concrete with barite when exposed to sulfuric acid rain. This program meticulously examines and
A Review on Properties of Heavy Weight Concrete
The objective of this review is to highlight the main aspects of Heavy Weight Concrete which covers the general concept of radiation physics being used in HWC, …