Effect of mix parameters and hydrogen loading on neutron radiation shielding characteristics of latex modified concrete mixes

Malkapur, Santhosh M.; Satdive, Harsharaj; Narasimhan, M. S.; Karkera, Narayana B.; Goverdhan, P.; Sathian, V.

doi:10.1016/j.pnucene.2015.02.010

Cited by 39 publications

(14 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, it was observed that the epoxy dispersion (MPCC2), macrofibers (MF2), and both types of fibers added at the same time caused an increase in HVL from about 5.0% (MPCC2) to 17.0 (MF3); in other words, the thickness of the shield necessary to reduce the radiation by half increased, which means that the shielding effectiveness was weakened. This is not consistent with the results reported in the literature [17][18][19]. Because of the increase in hydrogen content, the addition of polymers to concrete should result in an increase in its effectiveness in shielding against neutron radiation.…”

Section: Neutron Radiation Shielding Effectivenesscontrasting

confidence: 89%

“…This can be done by modifying the composition of the concrete mix using materials containing hydrogen. One of the milestones in the evolution of shielding technology against neutron radiation was the concept of adding polymers into concrete composites in the form of admixtures (e.g., superplasticizers) and additives (e.g., resins and fibers) [17][18][19]. This enables w/c ratio (water-cement ratio) reduction and improvement of usability properties like tightness, mechanical properties, and chemical resistance without loss of the workability of the fresh concrete mix.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Polymer Modification on the Microstructure of Shielding Concrete

2020

View full text Add to dashboard Cite

In this paper an analysis of the influence of polymer modification on the microstructure, shielding properties against neutrons, and compressive strength of heavy-weight magnetite concrete is carried out. The modifications involve the addition of acrylic or epoxy dispersions as well as micro- or/and macrofibers. A computer image analysis method is used to evaluate the microstructure of concretes and parameters of pore structure are calculated; these parameters include relative volume fraction, relative specific surface area, and pore arrangement ratios, including a proprietary ratio based on Voronoi tessellation. An assessment of significance of differences between stereological parameters of reference concrete and polymer modified concretes, as well as the impact of polymer form (dispersion or fibers) on shielding properties and compressive strength is carried out using Student’s t-test. The results show that except for the effect of the addition of both polypropylene micro- and macrofibers on the relative volume of pores, all other modifications result in statistically significant changes in the values of stereological parameters. Nevertheless, it is shown that neither polymer dispersions nor fibers have a statistically significant impact on shielding properties, but that they do influence compressive strength.

show abstract

Section: Neutron Radiation Shielding Effectivenesscontrasting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Influence of Polymer Modification on the Microstructure of Shielding Concrete

2020

View full text Add to dashboard Cite

show abstract

“…It was explained by the fact that the concept of removal crosssection is based upon the presence of hydrogen (and by lower degree on the presence of the other moderator materials, A ≤ 16, like C and O) in the absorber. This discussion is justified in the light of the results obtained by Malkapur et al [3] from the study on the effect of hydrogen loading on the neutron radiation shielding characteristics of latex modified concrete mixes. An increasing trend of total neutron cross-section and decreasing trend of dose transmission values with increased hydrogen content was observed in comparison with control concrete with a few exceptions.…”

Section: Introductionmentioning

confidence: 64%

Experiments on Neutron Transport through Concrete Member and the Potential for the Use in Material Investigation

et al. 2015

View full text Add to dashboard Cite

Concrete has been used as a shield against high-energy photons and neutrons since the beginning of use of nuclear reaction in energy, medicine and research. From that time the progress in concrete technology is huge -very good concrete used in 60's was about 30 MPa compressive strength, and now the recommendation of ETC-C is to use in EPR nuclear power plant the concrete at least class C45/55 for airplane resistant shell or class C40/50 for other structures. The Monte Carlo computer simulations indicate that an increase in density of the shielding member has a minor effect on the weakening of neutron transport and, therefore, the optimal composition of a shielding concrete against gamma radiation is different than the optimal composition of shielding concrete against neutron radiation. Neutron stopping is a two-step effect: slowing down of fast neutrons and absorption of thermal ones. Both result from the atomic composition of the barrier. The paper presents an analysis of neutrons transport through concrete cement mortar and polymer cement composites mortar based on specially designed experiments which allows for measuring fast neutron attenuation and thermal neutron capture separately. The aim of experiments was to find an influence of the cement type, polymer addition and moisture content on both aspects of neutron shielding properties of a composite. The experimental results were confirmed in MCNP simulations. There was found an influence of cement type on fast neutron attenuation due to differences in chemical composition. Next an important improvement of both fast neutron attenuation and thermal neutron capture due to polymer modification of concrete. The last was fond of clear linear relationship between fast neutron attenuation to the hydrogen content which shows the possibility of using this phenomenon in building material investigation like measurement of moisture content or polymer content in the polymer cement composites.

show abstract

“…The direction of recent research has focused on concrete’s ability to attenuate harmful energy radiating from nuclear sources through various alterations to its composition [ 12 , 13 , 14 , 15 , 16 ]. Nuclear sources radiate four kinds of radiation: alpha particles, beta particles, gamma rays, and neutrons ( Figure 1 ) [ 12 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Trends in Advanced Radiation Shielding Concrete for Construction of Facilities: Materials and Properties

et al. 2022

View full text Add to dashboard Cite

Nuclear energy offers a wide range of applications, which include power generation, X-ray imaging, and non-destructive tests, in many economic sectors. However, such applications come with the risk of harmful radiation, thereby requiring shielding to prevent harmful effects on the surrounding environment and users. Concrete has long been used as part of structures in nuclear power plants, X-ray imaging rooms, and radioactive storage. The direction of recent research is headed toward concrete’s ability in attenuating harmful energy radiated from nuclear sources through various alterations to its composition. Radiation shielding concrete (RSC) is a composite-based concrete that was developed in the last few years with heavy natural aggregates such as magnetite or barites. RSC is deemed a superior alternative to many types of traditional normal concrete in terms of shielding against the harmful radiation, and being economical and moldable. Given the merits of RSCs, this article presents a comprehensive review on the subject, considering the classifications, alternative materials, design additives, and type of heavy aggregates used. This literature review also provides critical reviews on RSC performance in terms of radiation shielding characteristics, mechanical strength, and durability. In addition, this work extensively reviews the trends of development research toward a broad understanding of the application possibilities of RSC as an advanced concrete product for producing a robust and green concrete composite for the construction of radiation shielding facilities as a better solution for protection from sources of radiation. Furthermore, this critical review provides a view of the progress made on RSCs and proposes avenues for future research on this hotspot research topic.

show abstract

Effect of mix parameters and hydrogen loading on neutron radiation shielding characteristics of latex modified concrete mixes

Cited by 39 publications

References 11 publications

Influence of Polymer Modification on the Microstructure of Shielding Concrete

Influence of Polymer Modification on the Microstructure of Shielding Concrete

Experiments on Neutron Transport through Concrete Member and the Potential for the Use in Material Investigation

Recent Trends in Advanced Radiation Shielding Concrete for Construction of Facilities: Materials and Properties

Contact Info

Product

Resources

About