Abstract
In this research, we produced eco-friendly and thermal efficient normal and lightweight concretes with different dosages of sawdust as replacement of sand. Conventional NWC containing 0, 5, 10, and 15% sawdust and LWC containing 0 and 10% sawdust of total dry volume of sand were evaluated in terms of volumetric shrinkage, compressive strength, flexural strength, fracture toughness, water absorption, density, thermal conductivity and energy efficiency. Test results showed that volumetric shrinkage and concrete density decreased while water absorption increased with the increase in sawdust percentage. For NWC and LWC sawdust formulations, the total fracture toughness increased by 10.71% and 14.89% respectively while the rupture strain increased by 58.86% and 37.30% respectively. At 28 days, the compressive strength of NWC and LWC sawdust formulations was more than 34 MPa and 21 MPa respectively and hence these concretes can be used for structural applications. The energy analysis of single room model prepared with sawdust formulations showed significant reduction (up to 21.42%) in heating ventilation and air-conditioning (HVAC) as well as in CO2 emissions (up to 13%). Conclusively, the utilization of sawdust provides viable source of raw materials for construction industry, eco-friendly solution of sawdust disposal and would help in conserving natural aggregate reservoirs.
| Original language | English |
|---|---|
| Pages (from-to) | 1016-1027 |
| Number of pages | 12 |
| Journal | Journal of Cleaner Production |
| Volume | 184 |
| DOIs | |
| Publication status | Published - May 20 2018 |
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Keywords
- CO emissions
- Energy efficiency
- Flexural strength
- Fracture toughness
- Lightweight concrete
- Sawdust
- Sustainability
- Thermal insulation
- Volumetric stability
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Environmental Science(all)
- Strategy and Management
- Industrial and Manufacturing Engineering
Cite this
Effective use of sawdust for the production of eco-friendly and thermal-energy efficient normal weight and lightweight concretes with tailored fracture properties. / Ahmed, Wisal; Khushnood, Rao Arsalan; Memon, Shazim Ali; Ahmad, Sajjad; Baloch, Waqas Latif; Usman, Muhammad.
In: Journal of Cleaner Production, Vol. 184, 20.05.2018, p. 1016-1027.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Effective use of sawdust for the production of eco-friendly and thermal-energy efficient normal weight and lightweight concretes with tailored fracture properties
AU - Ahmed, Wisal
AU - Khushnood, Rao Arsalan
AU - Memon, Shazim Ali
AU - Ahmad, Sajjad
AU - Baloch, Waqas Latif
AU - Usman, Muhammad
PY - 2018/5/20
Y1 - 2018/5/20
N2 - In this research, we produced eco-friendly and thermal efficient normal and lightweight concretes with different dosages of sawdust as replacement of sand. Conventional NWC containing 0, 5, 10, and 15% sawdust and LWC containing 0 and 10% sawdust of total dry volume of sand were evaluated in terms of volumetric shrinkage, compressive strength, flexural strength, fracture toughness, water absorption, density, thermal conductivity and energy efficiency. Test results showed that volumetric shrinkage and concrete density decreased while water absorption increased with the increase in sawdust percentage. For NWC and LWC sawdust formulations, the total fracture toughness increased by 10.71% and 14.89% respectively while the rupture strain increased by 58.86% and 37.30% respectively. At 28 days, the compressive strength of NWC and LWC sawdust formulations was more than 34 MPa and 21 MPa respectively and hence these concretes can be used for structural applications. The energy analysis of single room model prepared with sawdust formulations showed significant reduction (up to 21.42%) in heating ventilation and air-conditioning (HVAC) as well as in CO2 emissions (up to 13%). Conclusively, the utilization of sawdust provides viable source of raw materials for construction industry, eco-friendly solution of sawdust disposal and would help in conserving natural aggregate reservoirs.
AB - In this research, we produced eco-friendly and thermal efficient normal and lightweight concretes with different dosages of sawdust as replacement of sand. Conventional NWC containing 0, 5, 10, and 15% sawdust and LWC containing 0 and 10% sawdust of total dry volume of sand were evaluated in terms of volumetric shrinkage, compressive strength, flexural strength, fracture toughness, water absorption, density, thermal conductivity and energy efficiency. Test results showed that volumetric shrinkage and concrete density decreased while water absorption increased with the increase in sawdust percentage. For NWC and LWC sawdust formulations, the total fracture toughness increased by 10.71% and 14.89% respectively while the rupture strain increased by 58.86% and 37.30% respectively. At 28 days, the compressive strength of NWC and LWC sawdust formulations was more than 34 MPa and 21 MPa respectively and hence these concretes can be used for structural applications. The energy analysis of single room model prepared with sawdust formulations showed significant reduction (up to 21.42%) in heating ventilation and air-conditioning (HVAC) as well as in CO2 emissions (up to 13%). Conclusively, the utilization of sawdust provides viable source of raw materials for construction industry, eco-friendly solution of sawdust disposal and would help in conserving natural aggregate reservoirs.
KW - CO emissions
KW - Energy efficiency
KW - Flexural strength
KW - Fracture toughness
KW - Lightweight concrete
KW - Sawdust
KW - Sustainability
KW - Thermal insulation
KW - Volumetric stability
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UR - http://www.scopus.com/inward/citedby.url?scp=85045240045&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2018.03.009
DO - 10.1016/j.jclepro.2018.03.009
M3 - Article
VL - 184
SP - 1016
EP - 1027
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
SN - 0959-6526
ER -