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Optimizing Cementitious Materials for SiO.sub.2 AerogelGypsum Composites
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Optimizing Cementitious Materials for SiO.sub.2 AerogelGypsum Composites
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Journal Article
Optimizing Cementitious Materials for SiO.sub.2 AerogelGypsum Composites
2026
Overview
To prepare [SiO.sub.2] aerogel gypsum-based lightweight thermal insulation wall materials with better water resistance, a -hemihydrate gypsum (HG) was used as the main cementitious material. By adding portland cement (PC), fly ash (FA), and hydrated lime (HL), HG was modified. Using these materials, the HG-PC system and HG-PC-FA-HL system were constructed. The effects of inorganic admixture content on the performance of both systems were analyzed. Results show that the mechanical properties and water resistance were improved after adding a certain proportion of mineral admixtures to HG. The mechanical properties and water resistance of the HG-PC-FA-HL system were better than those of the HG-PC system. At the content of 9 wt. % FA, 20 wt. % PC, and 4 wt. % HL, the 28-day strength reached 41.07 MPa (5955 psi), the water absorption after soaking for 48 hours was 12.7%, and the softening coefficient was 0.72. Keywords: gypsum-based cementitious materials; [SiO.sub.2] aerogel inorganic composite materials; solid wastes; water resistance.
Publisher
American Concrete Institute
Subject
