Preparation and modeling of energy-saving building materials by using industrial solid waste

Ji, Ren; He, Yang; Zhang, Zuotai; Liu, Huan; Wang, Xidong

doi:10.1016/j.enbuild.2015.02.015

Cited by 10 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The alkali-activated LS attained up to 70 MPa compressive strength [7] with appropriate durability [8]. Additionally, LS has been successfully used as co-binder to produce a foam cement for energy-saving buildings [9], or as high-temperature AAM [10].…”

Section: Introductionmentioning

confidence: 99%

Byproduct-based ettringite binder – A synergy between ladle slag and gypsum

Nguyen

Adesanya

Ohenoja

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

Ladle slag (LS) is a byproduct from the steel industry that is usually reactive on its own and hydrates towards cementitious phases when mixed with water. However, these reaction products are often metastable, leading to micro-structural changes between 7 and 30 days after mixing. To address this issue, in this experimental investigation, a new binder was designed where LS was mixed with gypsum in order to deliver an ettringite-based binder (LSG). The experimental results revealed that the dominant crystalline phase of LSG was ettringite, which 2 remained stable with no conversion at later stages. For better understanding of the ettringitebased binder, mortar characterization, mechanical properties, and durability of LSG were investigated. LSG showed good mechanical properties and excellent freeze-thaw resistance after 300 cycles, which is comparable to other calcium sulfoaluminate cements. Therefore, as a result, the byproduct-based ettringite binder synthesized herein could offer a solution to steelmaking byproducts with a low-CO2 binder, which could be used in a wide range of applications in the construction industry.

show abstract

Section: Introductionmentioning

confidence: 99%

Byproduct-based ettringite binder – A synergy between ladle slag and gypsum

Nguyen

Adesanya

Ohenoja

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…Thermal conductivities of 0.04~0.06 W/(m•K) could be obtained at 88.5~95.4% porosity, but high porosity means a low content of the solid phase in foamed concrete and a low heat capacity, thus weakening the thermal comfort of indoor building and the mechanical strength [15]. To improve the mechanical strength and reduce the thermal conductivity of foamed concrete, many approaches have been conducted and investigated, as shown in Table 1 [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]; however, these approaches could not significantly enhance insulation performance under suitable mechanical strength [35,36]. Other approaches were also developed under the suitable content of the cement matrix (suitable dry density).…”

Section: Introductionmentioning

confidence: 99%

Pore Structure, Hardened Performance and Sandwich Wallboard Application of Construction and Demolition Waste Residue Soil Recycled Foamed Concrete

Yang,

Jin

et al. 2024

Sustainability

View full text Add to dashboard Cite

Construction and demolition waste residue soil (CDWRS) recycled foamed concretes were prepared by introducing the original CDWRS into modified binders. Pore structure, hardened performance, and sandwich wallboard application were also investigated. The results indicated that 51 kg/m3 of water glass and 7.5 kg/m3 of gypsum could significantly increase the strength and generate a slight influence on the thermal insulation performance of CDWRS recycled foamed concrete. The largest enhancing rate of 28-day compressive strength at a density of 600 kg/m3 could reach 205.5%. Foamed concrete with 1126 kg/m3 of CDWRS, modified with water glass and gypsum, showed a low thermal conductivity of 0.11 W/(m·K) and a dry density of 626 kg/m3. In total, 988 kg/m3 of CDWRS in foamed concrete led to a compressive strength of 7.76 MPa, a thermal conductivity of 0.14 W/(m·K), and a dry density of 948 kg/m3. Utilization of the foamed concrete in the sandwich structure could fabricate energy-saving wallboards with a minimum heat transfer coefficient of 0.75 W/(m2·K) and a relatively high compressive strength of 16.5 MPa, providing great confidence of CDWRS consumption in the building energy-saving field.

show abstract