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A platform for research: civil engineering, architecture and urbanism
Preparation and hardened properties of lightweight gypsum plaster based on pre-swelled bentonite
https://orcid.org/0000-0001-8467-1650
https://orcid.org/0000-0002-2822-4642
Highlights Swelled bentonite promotes formation of micron-size pore in porous gypsum paste. Formation of micron-size pore can improve thermal insulation performance of gypsum. Swelled bentonite can enhance moisture absorption/desorption of gypsum paste. Adding swelled bentonite into gypsum paste can generate slight humidity hysteresis.
Abstract Lightweight gypsum plasters (LGPs) were successfully prepared by adding pre-swelled bentonite to gypsum paste. As the content of bentonite slurry increased from 0% to 40%, the excessive water in the swelled bentonite could not be consumed completely, leading to an increase in the median size of pores in the LGP as well as increased porosity. The increasing bentonite content decreased the dry density, compressive strength, flexural strength and enhanced thermal insulation property, yielding LGPs with dry density, compressive strength, flexural strength and thermal conductivity of 784–1196 kg/m3, 3.9–11.7 MPa, 2.1–3.9 MPa, and 0.116–0.143 W/m K, respectively. More importantly, the pores that formed in the montmorillonite layers of the bentonite enhanced the humidity-controlling ability of the LGPs.
Preparation and hardened properties of lightweight gypsum plaster based on pre-swelled bentonite
https://orcid.org/0000-0001-8467-1650
https://orcid.org/0000-0002-2822-4642
Highlights Swelled bentonite promotes formation of micron-size pore in porous gypsum paste. Formation of micron-size pore can improve thermal insulation performance of gypsum. Swelled bentonite can enhance moisture absorption/desorption of gypsum paste. Adding swelled bentonite into gypsum paste can generate slight humidity hysteresis.
Abstract Lightweight gypsum plasters (LGPs) were successfully prepared by adding pre-swelled bentonite to gypsum paste. As the content of bentonite slurry increased from 0% to 40%, the excessive water in the swelled bentonite could not be consumed completely, leading to an increase in the median size of pores in the LGP as well as increased porosity. The increasing bentonite content decreased the dry density, compressive strength, flexural strength and enhanced thermal insulation property, yielding LGPs with dry density, compressive strength, flexural strength and thermal conductivity of 784–1196 kg/m3, 3.9–11.7 MPa, 2.1–3.9 MPa, and 0.116–0.143 W/m K, respectively. More importantly, the pores that formed in the montmorillonite layers of the bentonite enhanced the humidity-controlling ability of the LGPs.
Preparation and hardened properties of lightweight gypsum plaster based on pre-swelled bentonite
https://orcid.org/0000-0001-8467-1650
https://orcid.org/0000-0002-2822-4642
Highlights Swelled bentonite promotes formation of micron-size pore in porous gypsum paste. Formation of micron-size pore can improve thermal insulation performance of gypsum. Swelled bentonite can enhance moisture absorption/desorption of gypsum paste. Adding swelled bentonite into gypsum paste can generate slight humidity hysteresis.
Abstract Lightweight gypsum plasters (LGPs) were successfully prepared by adding pre-swelled bentonite to gypsum paste. As the content of bentonite slurry increased from 0% to 40%, the excessive water in the swelled bentonite could not be consumed completely, leading to an increase in the median size of pores in the LGP as well as increased porosity. The increasing bentonite content decreased the dry density, compressive strength, flexural strength and enhanced thermal insulation property, yielding LGPs with dry density, compressive strength, flexural strength and thermal conductivity of 784–1196 kg/m3, 3.9–11.7 MPa, 2.1–3.9 MPa, and 0.116–0.143 W/m K, respectively. More importantly, the pores that formed in the montmorillonite layers of the bentonite enhanced the humidity-controlling ability of the LGPs.
Preparation and hardened properties of lightweight gypsum plaster based on pre-swelled bentonite
Jiang, Jun (author) / Lu, Zhongyuan (author) / Li, Jun (author) / Fan, Yong (author) / Niu, Yunhui (author)
Construction and Building Materials ; 215 ; 360-370
2019-04-23
11 pages
Article (Journal)
Electronic Resource
English
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