Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites

Pedrajas, Daniel López; Franco, Manuel Carmona; Sáenz, I. Garrido; Ramos, F. Javier; Romero, Juan F. Rodríguez; Simón, Ana M. Borreguero

doi:10.1016/j.applthermaleng.2022.119271

Cited by 7 publications

(1 citation statement)

References 39 publications

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“…Thompson et al employed hydrogel beads and methyl cellulose to control the porosity and pore size distribution in gypsum through templating, enhancing both its water resistance and sound insulation capabilities [17]. Pedrajas et al combined concentrated slurries containing polystyrene nano-particles (NPSs) with gypsum to fabricate lightweight gypsum composite materials, demonstrating exceptional thermal insulation and waterproofing properties [18]. Charai et al utilised coal fly ash (CFA) as a porogen and plant fibres as both a moisture absorber and a reinforcing agent to produce gypsum-based lightweight composite materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterisation of Hemihydrate Gypsum–Polyacrylamide Composite: A Novel Inorganic/Organic Cementitious Material

Chen,

Mi,

Yang

et al. 2024

Materials

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This study combined inorganic α-hemihydrate gypsum (α-HHG) with organic polyacrylamide (PAM) hydrogel to create a novel α-HHG/PAM composite material. Through this facile composite strategy, this fabricated material exhibited a significantly longer initial setting time and higher mechanical strength compared to α-HHG. The effects of the addition amount and the concentration of PAM precursor solution on the flowability of the α-HHG/PAM composite material slurry, initial setting time, and mechanical properties of the hardened specimens were investigated. The structural characteristics of the composite material were examined using XRD, FE-SEM, and TGA. The results showed that the initial setting time of the α-HHG/PAM composite material was 25.7 min, which is an extension of 127.43% compared to that of α-HHG. The flexural strength and compressive strength of the oven-dried specimens were 23.4 MPa and 58.6 MPa, respectively, representing increases of 34.73% and 84.86% over values for α-HHG. The XRD, FE-SEM, and TGA results all indicated that the hydration of α-HHG in the composite material was incomplete. The incompleteness is caused by the competition between the hydration process of inorganic α-HHG and the gelation process of the acrylamide molecules for water, which hinders some α-HHG from entirely reacting with water. The enhanced mechanical strength of the α-HHG/PAM composite material results from the tight interweaving and integrating of organic and inorganic networks. This study provides a concise and efficient approach to the modification research of hemihydrate gypsum.

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Section: Introductionmentioning

confidence: 99%