Influence of gadolinium oxide and ulexite on cement hydration and technical properties of mortars for neutron radiation shielding purposes

Phase transition and high-pressure behavior of ulexite, a potential aggregate in radiation-shielding concretes

“…The use of borates alongside with other minerals as aggregates in concretes was also reported in order to attenuate γradiation [15][16][17][18]. Researchers have investigated the shielding and mechanical properties of boratebased aggregates in concretes, mortars and epoxy resins in order to enhance the shielding efficiency towards neutron radiations [8,[19][20][21][22][23][24][25][26]. Because of its low density (~2 g/cm 3 ) and cost, ulexite could be used for the production of concretes and a few studies have been devoted to determine the role of ulexite on the mortars and concretes properties (e.g., [8,20]).…”

Physical-radiation shielding properties of concrete contains colemanite and ulexite

“…In addition, Piotrowski et al 27 determined that good long-term strength would be produced for specimens with 3% of ulexite. In other study, a 20% reduction in the compressive strength was shown in the concrete containing 15% rice husk content.…”

“…Besides those recent works, there has been several studies done using this kind of materials in order to shield radiation including gamma and also neutron. [24][25][26][27][28] In this paper, concrete mixes with different aggregate replacement ratios of colemanite or ulexite ranging from 0% to 50% were produced with increments of 10%. Mechanical properties including compressive strength, flexural strength and elastic modulus were determined.…”

Influence of Polymer Modification on the Microstructure of Shielding Concrete

“…From the point of view of concrete modification, it is also important to note that some modifiers introduced into the concrete mix may cause a decrease in compression strength, which is the basic characteristic of concrete as a structural material [20].…”