A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Production of glass-ceramic aggregates from solid wastes for high-strength and low-shrinkage lightweight mortars
https://orcid.org/0000-0002-9566-7136
https://orcid.org/0000-0002-1003-5317
https://orcid.org/0000-0002-3707-0235
https://orcid.org/0000-0001-9123-706X
Abstract To alleviate the shortage of traditional aggregates and reduce energy consumption, glass-ceramic aggregates were produced from incinerated sewage sludge ash (ISSA) and waste glass powder (WGP) through low-temperature sintering at 800 ℃ without fluxing or nucleation agents. Thermodynamic calculations were employed to predict phase equilibria and quantification of aggregates. The density, porosity, compressive strength, and crystalline phases in the aggregates were investigated as a function of WGP content (0–80 wt% with an interval of 20 wt%). The resulting glass-ceramic aggregates exhibited compressive strength of 1.9–47.0 MPa, density of 1526–2379 kg/cm3, and open porosity of 44.5% to 9.8%. Further application of glass-ceramic aggregates in mortars was assessed compared to manufactured sand (Ref-M) and expanded clay aggregate (Ref-C), including shrinkage, thermal conductivity, alkali-silica reaction, and microstructural characteristics. Results indicated that glass-ceramic aggregates reduced the 12.4–26.6% oven-dry density, 45.0–64.0% thermal conductivity, and 68.8–538.2 με 7-d autogenous shrinkage of lightweight mortars compared to Ref-M. Moreover, 3.0–35.5% drying shrinkage reduction and 5.7–139.0% 28-d compressive strength increase were achieved compared to Ref-C. The lightweight mortars containing glass-ceramic aggregates did not show any alkali-silica reaction risks. The synthesis of glass-ceramic aggregates at low temperatures and their successful application in lightweight products provided new insights and viable outlet for solid wastes.
Graphical Abstract Display Omitted
Highlights Glass-ceramic aggregates with incinerated sewage sludge ash were produced. The phase equilibria and quantification of formed aggregates were predicted. The applicability of glass-ceramic aggregates for lightweight mortars was discussed.
Production of glass-ceramic aggregates from solid wastes for high-strength and low-shrinkage lightweight mortars
https://orcid.org/0000-0002-9566-7136
https://orcid.org/0000-0002-1003-5317
https://orcid.org/0000-0002-3707-0235
https://orcid.org/0000-0001-9123-706X
Abstract To alleviate the shortage of traditional aggregates and reduce energy consumption, glass-ceramic aggregates were produced from incinerated sewage sludge ash (ISSA) and waste glass powder (WGP) through low-temperature sintering at 800 ℃ without fluxing or nucleation agents. Thermodynamic calculations were employed to predict phase equilibria and quantification of aggregates. The density, porosity, compressive strength, and crystalline phases in the aggregates were investigated as a function of WGP content (0–80 wt% with an interval of 20 wt%). The resulting glass-ceramic aggregates exhibited compressive strength of 1.9–47.0 MPa, density of 1526–2379 kg/cm3, and open porosity of 44.5% to 9.8%. Further application of glass-ceramic aggregates in mortars was assessed compared to manufactured sand (Ref-M) and expanded clay aggregate (Ref-C), including shrinkage, thermal conductivity, alkali-silica reaction, and microstructural characteristics. Results indicated that glass-ceramic aggregates reduced the 12.4–26.6% oven-dry density, 45.0–64.0% thermal conductivity, and 68.8–538.2 με 7-d autogenous shrinkage of lightweight mortars compared to Ref-M. Moreover, 3.0–35.5% drying shrinkage reduction and 5.7–139.0% 28-d compressive strength increase were achieved compared to Ref-C. The lightweight mortars containing glass-ceramic aggregates did not show any alkali-silica reaction risks. The synthesis of glass-ceramic aggregates at low temperatures and their successful application in lightweight products provided new insights and viable outlet for solid wastes.
Graphical Abstract Display Omitted
Highlights Glass-ceramic aggregates with incinerated sewage sludge ash were produced. The phase equilibria and quantification of formed aggregates were predicted. The applicability of glass-ceramic aggregates for lightweight mortars was discussed.
Production of glass-ceramic aggregates from solid wastes for high-strength and low-shrinkage lightweight mortars
https://orcid.org/0000-0002-9566-7136
https://orcid.org/0000-0002-1003-5317
https://orcid.org/0000-0002-3707-0235
https://orcid.org/0000-0001-9123-706X
Abstract To alleviate the shortage of traditional aggregates and reduce energy consumption, glass-ceramic aggregates were produced from incinerated sewage sludge ash (ISSA) and waste glass powder (WGP) through low-temperature sintering at 800 ℃ without fluxing or nucleation agents. Thermodynamic calculations were employed to predict phase equilibria and quantification of aggregates. The density, porosity, compressive strength, and crystalline phases in the aggregates were investigated as a function of WGP content (0–80 wt% with an interval of 20 wt%). The resulting glass-ceramic aggregates exhibited compressive strength of 1.9–47.0 MPa, density of 1526–2379 kg/cm3, and open porosity of 44.5% to 9.8%. Further application of glass-ceramic aggregates in mortars was assessed compared to manufactured sand (Ref-M) and expanded clay aggregate (Ref-C), including shrinkage, thermal conductivity, alkali-silica reaction, and microstructural characteristics. Results indicated that glass-ceramic aggregates reduced the 12.4–26.6% oven-dry density, 45.0–64.0% thermal conductivity, and 68.8–538.2 με 7-d autogenous shrinkage of lightweight mortars compared to Ref-M. Moreover, 3.0–35.5% drying shrinkage reduction and 5.7–139.0% 28-d compressive strength increase were achieved compared to Ref-C. The lightweight mortars containing glass-ceramic aggregates did not show any alkali-silica reaction risks. The synthesis of glass-ceramic aggregates at low temperatures and their successful application in lightweight products provided new insights and viable outlet for solid wastes.
Graphical Abstract Display Omitted
Highlights Glass-ceramic aggregates with incinerated sewage sludge ash were produced. The phase equilibria and quantification of formed aggregates were predicted. The applicability of glass-ceramic aggregates for lightweight mortars was discussed.
Production of glass-ceramic aggregates from solid wastes for high-strength and low-shrinkage lightweight mortars
Huang, Yujie (author) / Bian, Zuwang (author) / Ji, Weiyi (author) / Yio, Marcus (author) / Chen, Ziwei (author) / Lu, Jian-Xin (author) / Cheeseman, Christopher (author) / Poon, Chi Sun (author)
2024-01-27
Article (Journal)
Electronic Resource
English
British Library Online Contents | 2015