TY - JOUR

T1 - Greener lightweight foam concrete using seaweed industrial by-product to replace natural sand with inorganic salt as a stabilizer

AU - Amir, Nizar

AU - Hussin, Farihahusnah

AU - Aroua, Mohamed Kheireddine

AU - Gozan, Misri

PY - 2024/10/2

Y1 - 2024/10/2

N2 - In recent years, the seaweed industry has expanded, resulting in higher volumes of seaweed industrial by-products (SWB). People commonly dispose SWB on land, which raises environmental concerns due to its hazardous chemical content. The use of waste materials as alternatives to natural sand has gained attention due to its potential to reduce environmental impact. Therefore, this study aimed to develop a greener lightweight foam concrete (LFC) by incorporating 0-30% SWB as a replacement for natural sand in fine aggregates and evaluate its performance. Furthermore, the study investigated the inclusion of inorganic salt concentrations ranging from 0 to 15% into the concrete mixture to improve performance. The production, sampling, and testing procedures followed the SNI 8640:2018 standards. Properties like density, water absorption, drying shrinkage, and compressive strength were analyzed for SWB percentage (0-30%), salt concentration (0-15%), foaming pressure (0.20, 0.39, and 0.59 MPa), and curing duration (7, 14, and 28 days). Viable specimens were further examined for microstructure, energy intensity, CO2 emission, and production cost. Specimen FS5 met standards with a density of 707.1 kg/m3, compressive strength of 2.12 MPa, water absorption of 25.45% (v/v), and drying shrinkage of 0.13%. The energy intensity, CO2 emission, and total cost of greener LFC were calculated to be 159.88 MJ/m3, 188.98 kg of CO2/m3, and IDR 682,130/m3, respectively. Ultimately, this work greatly contributes to the field of green manufacturing and environmental sustainability by successfully decreasing energy intensity, CO2 emissions, and environmental harm in LFC production processes.

AB - In recent years, the seaweed industry has expanded, resulting in higher volumes of seaweed industrial by-products (SWB). People commonly dispose SWB on land, which raises environmental concerns due to its hazardous chemical content. The use of waste materials as alternatives to natural sand has gained attention due to its potential to reduce environmental impact. Therefore, this study aimed to develop a greener lightweight foam concrete (LFC) by incorporating 0-30% SWB as a replacement for natural sand in fine aggregates and evaluate its performance. Furthermore, the study investigated the inclusion of inorganic salt concentrations ranging from 0 to 15% into the concrete mixture to improve performance. The production, sampling, and testing procedures followed the SNI 8640:2018 standards. Properties like density, water absorption, drying shrinkage, and compressive strength were analyzed for SWB percentage (0-30%), salt concentration (0-15%), foaming pressure (0.20, 0.39, and 0.59 MPa), and curing duration (7, 14, and 28 days). Viable specimens were further examined for microstructure, energy intensity, CO2 emission, and production cost. Specimen FS5 met standards with a density of 707.1 kg/m3, compressive strength of 2.12 MPa, water absorption of 25.45% (v/v), and drying shrinkage of 0.13%. The energy intensity, CO2 emission, and total cost of greener LFC were calculated to be 159.88 MJ/m3, 188.98 kg of CO2/m3, and IDR 682,130/m3, respectively. Ultimately, this work greatly contributes to the field of green manufacturing and environmental sustainability by successfully decreasing energy intensity, CO2 emissions, and environmental harm in LFC production processes.

U2 - 10.1016/j.jobe.2024.110815

DO - 10.1016/j.jobe.2024.110815

M3 - Journal article

VL - 97

JO - Journal of Building Engineering

JF - Journal of Building Engineering

SN - 2352-7102

M1 - 110815

ER -