A novel Two-step Hydration Process of preparing cement-free non-fired bricks from waste phosphogypsum

Zhou, Jun; Yu, Dongxue; Shu, Zhu; Li, Tiantian; Chen, Yun; Wang, Yanxin

doi:10.1016/j.conbuildmat.2014.09.075

Cited by 71 publications

(23 citation statements)

References 19 publications

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“…It is important and possible for industrial implementation to obtain a full value product in PG processing, such as binding plaster, anhydrite cement, autoclave plaster, binders and construction elements [38][39][40][41][42][43][44], chalk fertilizer [45,46], agriculture and fertilizers [41,[46][47][48][49][50], composite insulating materials [26], fillers for synthetic masses, paints and enamels [44], remediation agents for degraded areas enhancing soil acidity [51,52], and road construction materials [53,54].…”

Section: Analysis Of Phosphogypsum Chemical Compositionmentioning

confidence: 99%

Study on the Properties of Waste Apatite Phosphogypsum as a Raw Material of Prospective Applications

Grabas

Pawełczyk

Stręk

et al. 2018

Waste Biomass Valor

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This paper presents the results of the study on chemical and the physical properties of waste phosphogypsum (PG) of apatite origin from the former chemical plant Wizow, Poland which are important for further processing and economic use. The research was carried out to verify whether the waste might be useful as a raw material for rare earth elements (REE) recovery and the manufacture of building materials. The following methods were chosen: X-ray diffraction, scanning electron microscopy with an energy-dispersive X-ray detector, atomic absorption spectrometry, inductively coupled plasma spectrometry, differential thermal analysis, thermogravimetry, and gamma spectrometry with natural radioactive contamination analyzer. It has been proven that the chemical physical properties of phosphogypsum provide an opportunity to utilize this waste material as a source of REE and raw material for building purposes. PG contains an overall amount of REE in the interval of 0.343-0.637% by mass and does not show radioactivity level which would exclude it from construction purposes. The presented results serve as the basis for currently available technological directions in the management of apatite PG for useful trade products, which creates a chance for the elimination of its storage necessity by further processing.

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Section: Analysis Of Phosphogypsum Chemical Compositionmentioning

confidence: 99%

Study on the Properties of Waste Apatite Phosphogypsum as a Raw Material of Prospective Applications

Grabas

Pawełczyk

Stręk

et al. 2018

Waste Biomass Valor

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“…In this research, rice husk as an additive was used to produce non-fired bricks. The advantages of non-fired brick production is expected to help the realize targets of the green growth strategy such as reducing pollution [4].…”

Section: Mousavi)mentioning

confidence: 99%

Performance of Non-fired Green Brick Containing Rice Husk as Sustainable Building Material

Mousavi

2016

IJE

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The demand for sustainable alternative construction materials to cement in modern technology cannot be underemphasized. This paper presents a non-fired green brick with an agriculture residue namely, rice husk. Although, high plasticity brown clay deposits are widely distributed in Malaysia and rice husk is a well known agriculture residue, research works on non-fired green brick with rice husk are relatively scarce. This research aims to investigate the strength development in non-fired bricks containing various amounts of rice husk. To achieve such aim, compression and flexural tests were conducted to evaluate compressive and flexural strengths of non-fired bricks. A series of brick specimens were cast with varying rice husk percentages. The test specimens were naturally sun dried. The effects of rice husk percentage (9-15%) and drying age (1, 7, 14, 21, and 28 days) on Atterberg limits; compressive strength; water absorption and flexural strength were investigated. The results indicate that, 12% rice husk is the optimum content to reach maximum 28-day compressive and flexural strengths of 10.4 MPa and 3.5 MPa, respectively. The results further showed that rice husk higher than 12% leads lower strength than control bricks for all the ages. In summary, it has been observed that rice husk enables a rapid strength development, enhancing the compressive and flexural strengths of the bricks. The results developed in this research work can contribute a cost-effective design of non-fired green brick as a sustainable building material.

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“…Nowadays, many studies on the reuse of phosphogypsum at home and abroad have been reported [4][5][6]. The semihydrated gypsum can be used to prepare building gypsum and related products by using the cementitious properties [7,8].…”

Section: Introductionmentioning

confidence: 99%

Research on the Thermal Conductivity and Water Resistance of Foamed Phosphogypsum

2021

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Phosphogypsum is a kind of solid waste which pollutes the environment without reasonable treatment. The application of phosphogypsum in the field of building materials provides an ideal method to solve this problem. Meanwhile, the phosphogypsum mixed with foam can be used for the thermal insulation of wall materials. This paper aims to study the influence of foam volume and cement content on the thermal conductivity, water resistance coefficient and the mechanical strengths of foamed phosphogypsum. The volume of foam in this study ranged from 0% to 60%. Moreover, the influences of humidity and cement content on the mechanical strengths of phosphogypsum are investigated. Scanning electron microscope and the mercury intrusion porosimetry are used for the microscale research and analysis. Results indicate that the relationships between the parameters (thermal conductivity, water resistance coefficient and mechanical strengths) and foam volume fit well with a negatively correlated linear function. The addition of cement can improve the compactness of phosphogypsum and decrease the diameter and volume of pores. Therefore, the thermal conductivity, water resistance coefficient and mechanical strengths of phosphogypsum are increased by the addition of cement.

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A novel Two-step Hydration Process of preparing cement-free non-fired bricks from waste phosphogypsum

Cited by 71 publications

References 19 publications

Study on the Properties of Waste Apatite Phosphogypsum as a Raw Material of Prospective Applications

Study on the Properties of Waste Apatite Phosphogypsum as a Raw Material of Prospective Applications

Performance of Non-fired Green Brick Containing Rice Husk as Sustainable Building Material

Research on the Thermal Conductivity and Water Resistance of Foamed Phosphogypsum

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