TY - JOUR
T1 - Upgrading and evaluation of waste paper sludge ash in eco-lightweight cement composites
AU - Doudart de la Grée, G.C.H.
AU - Yu, Q.
AU - Brouwers, H.J.H.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - The upgrading and evaluation of waste paper sludge fly ash (PsFA) as a cement substitute in wood-wool composite boards (WWCB) is investigated in the present study. This type of board is widely applied in the building environment because of its excellent thermal and acoustical properties; however, cement is still widely used as a binder although environmentally its use leads to a high CO2 footprint of the composite and is therefore less favorable for sustainable building designs. Paper sludge fly ash could be a feasible replacement of cement; however, its high water demand limits the substitution level to 10% by mass of binder. Therefore, different upgrading methods including water treatment and thermal treatment are performed, and their effects are evaluated using various analytical methods. Afterward, PsFA's suitability as a binder replacer in WWCB is investigated with the hypothesis to refine the microstructure of the boards, resulting in extra lightweight properties. A substitution level of binder with the upgraded PsFA by 20-60% in WWCB can be achieved and is confirmed by the improved mechanical, thermal-insulating, and sound-absorbing properties.
AB - The upgrading and evaluation of waste paper sludge fly ash (PsFA) as a cement substitute in wood-wool composite boards (WWCB) is investigated in the present study. This type of board is widely applied in the building environment because of its excellent thermal and acoustical properties; however, cement is still widely used as a binder although environmentally its use leads to a high CO2 footprint of the composite and is therefore less favorable for sustainable building designs. Paper sludge fly ash could be a feasible replacement of cement; however, its high water demand limits the substitution level to 10% by mass of binder. Therefore, different upgrading methods including water treatment and thermal treatment are performed, and their effects are evaluated using various analytical methods. Afterward, PsFA's suitability as a binder replacer in WWCB is investigated with the hypothesis to refine the microstructure of the boards, resulting in extra lightweight properties. A substitution level of binder with the upgraded PsFA by 20-60% in WWCB can be achieved and is confirmed by the improved mechanical, thermal-insulating, and sound-absorbing properties.
KW - Acoustical property
KW - Hydration kinetics
KW - Lightweight wood-composite
KW - Paper sludge fly ash
KW - Thermal physical property
KW - Treatment
UR - http://www.scopus.com/inward/record.url?scp=85040573605&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)MT.1943-5533.0002186
DO - 10.1061/(ASCE)MT.1943-5533.0002186
M3 - Article
AN - SCOPUS:85040573605
SN - 0899-1561
VL - 30
JO - Journal of Materials in Civil Engineering
JF - Journal of Materials in Civil Engineering
IS - 3
M1 - 04018021
ER -