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·Download Citation Highly efficient modified phosphogypsum building gypsum powder and environmentally friendly utilisation in self levelling mortar The stockpiling of phosphogypsum is a waste
·The work by Zemni et al [44] provides a study on the generation of calcium silicate and sodium sulphate through the chemical reactions between phosphogypsum and sodium results showed that the solid produced during the reaction can sequester CO [17] assessed the effect of PG on properties such as workability density
·Phosphogypsum PG was treated to reduce activity concentrations of 226Ra which was found to exceed that permitted by international regulations Treatment methods using hybrid water treatment sulphuric acid treatment mixed acid H2SO4 and HNO3 treatment household water treatment and calcium carbonate powder treatment were applied Reduction
·1 Introduction Phosphogypsum PG is an industrial by product from the production of wet process phosphoric acid [1] Due to the preparation process of phosphoric acid the main chemical composition of PG is dihydrate calcium sulfate CaSO 4 ·2H 2 O PG generally contains small amounts of impurities such as phosphorus fluorine organic matters heavy
·This study contributes to sustainable construction practices by exploring the use of phosphogypsum a commonly discarded byproduct in the production of recycled aggregates Addressing both environmental and economic aspects of sustainability we investigate the feasibility of employing phosphogypsum as a primary raw material in collaboration with
·Phosphogypsum PG is a bulk industrial solid waste of wet process phosphoric acid production Every ton of phosphoric acid production generates as many as 4 6 tons of PG including more than 90% of CaSO 4 ·2H 2 O a small amount of phosphorus fluorine organic matter oxides heavy metals radioactive substances and other impurities that have serious
·Soil stabilization using additives is considered as one of the sustainable alternative techniques to deal with acute material shortages Critically reviewing the contemporary works on soil stabilization would help practitioners and researchers to comprehend the merits and demerits of each stabilization method influential parameters and associated constraints
·The use of phosphogypsum as a setting controller for Portland cement is very promising c = 4 A; Z = 3; space group P6âââ has been refined from time of flight neutral powder
·Phosphogypsum PG is a by product generated from the phosphorus fertilizer industry phosphoric acid production PG is similar to natural gypsum but there are some differences of which it contains some impurities such as water soluble phosphate P 2 O 5 water soluble fluoride F − and P 2 O 5 substituted in the gypsum crystal lattice PG and
·Strength The hemihydrate phosphogypsum powder and the corresponding water used for sample preparation were determined by Eq 2 and Eq 3 respectively After stirring for 3 min the slurry was poured into the molds and demold after 24 h A group of three prisms with size of 40 mm × 40 mm × 160 mm were prepared and cured 60% 20
·Phosphogypsum PG is a by product of the phosphate fertilizer industry that is produced during the phosphoric acid production process Annual global PG production ranges between 100 to 300 Mt
·Semantic Scholar extracted view of "CO2 pretreatment of municipal solid waste incineration fly ash and its feasible use as supplementary cementitious material " by Pengfei Ren et al Environmental filling materials based on phosphogypsum powder with municipal solid waste incineration ash Longlong Yin Q Guo Xiao Wang Jing Yuan Qianfeng
·Phosphogypsum PG was used as the second solid material in this study This waste was obtained from the Lithuanian fertilizer plant and hemihydrate phosphogypsum α − CaSO 4 ⋅0· 5H 2 O formed in wet process phosphoric acid production In particular the PG was taken from by product removal conveyor belt and it was dried at 100 °C ± 5 °C
·The X ray powder diffraction pattern of the prepared HC material was elucidated in Fig 1 obtained diffractogram was perfectly indexed as hydrocalumite Ca 2 OH 6 Cl·2H 2 O based on the Material Project Database mp 42175 as shown in Fig 1 A This confirms that the synthesized material corresponds to the typical hydrocalumite
·1 Introduction Phosphogypsum PG is a type of industrial solid waste generated during the wet method process for producing phosphoric acid [1] and the manufacturing of one ton of phosphoric acid yields between 4 and 6 tons of PG [2] At present China is witnessing an annual release of more than 70 million tons of PG contributing to an accumulated stockpile
·Phosphogypsum PG is a common industrial waste from the production of phosphoric acid by the wet process Usually it requires pretreatment before use due to the presence of impurities Developing a method that can be directly used to reutilize untreated PG in building materials is thus of great significance Autoclaved aerated concrete AAC has a load
·The effect of the content of calcined phosphogypsum CPG and slaked lime SL on the fluidity setting time and compressive strength of supersulfated cement SSC were investigated The hydration mechanism of the SSC containing CPG and SL was examined through electrical resistivity hydration heat and chemical shrinkage measurements and
·Beta hemihydrate phosphogypsum β HPG as a cementitious material can be used for the preparation of lightweight gypsum to facilitate the utilization of phosphogypsum PG and reduce the energy
·Phosphogypsum PG is a common industrial waste from the production of phosphoric acid by the wet process Usually it requires pretreatment before use due to the presence of impurities Developing a method that can be directly used to reutilize untreated PG in building materials is thus of great significance
·The use of phosphogypsum for filling materials is A Cien D N & Pupeikisa D Porous alkali activated materials based on municipal solid WIA with addition of phosphogypsum powder
·Phosphogypsum PG is a hazardous industrial solid waste product from the wet phosphate industry 1 widespread deposition of that fine light to dark grey powder with a slight odor and
·Phosphogypsum in mortars not only acts as fillers but also takes part in the hydration of cements This work provides a method for the direct use of phosphogypsum and offers a high performance mortar used in civil engineering Besides the cost of this innovative mortar has been reduced dramatically due to the addition of waste material
