TY - JOUR
T1 - Experimental investigation on effects of calcined bentonite on fresh, strength and durability properties of sustainable self-compacting concrete
AU - Laidani, Zine El-Abidine
AU - Benabed, Benchaa
AU - Abousnina, Rajab
AU - Gueddouda, M. Kamal
AU - Kadri, El-Hadj
PY - 2020/1/10
Y1 - 2020/1/10
N2 - With the current focus on sustainable development in the civil engineering field, it is necessary to develop construction and building materials with reasonable costs and low environmental impacts in order to reduce CO2 emissions during the production of concrete, and from the cement industry as a whole. This research studies the effect of using calcined bentonite (CB) as partial replacement of Ordinary Portland Cement (OPC) on the sustainability of self-compacting concrete (SCC). The cement in SCC mixes has been replaced with two different types of CB at 0, 5, 10, 15, 20, 25 and 30% by weight. Slump flow, V-funnel flow time, L-box test and sieve stability tests are performed to evaluate the fresh properties of SCC mixtures. Various tests are used to assess the performance of SCC mixtures in hardened states, such as compressive strength, porosity accessible to water, chloride-ions penetration and gas permeability. The results showed that the use of CB in SCC mixes reduced the fresh properties of SCC and the slump flows, flow times, and segregation tests are good enough for SCC production. At a hardened state, SCC with 10–15% of CB had a higher compressive strength up to 90 days, as well as improved porosity, chloride-ions penetration and gas permeability properties. These results indicate that a CB solution will reduce CO2 emissions and make durable and eco-friendly SCC at a low cost.
AB - With the current focus on sustainable development in the civil engineering field, it is necessary to develop construction and building materials with reasonable costs and low environmental impacts in order to reduce CO2 emissions during the production of concrete, and from the cement industry as a whole. This research studies the effect of using calcined bentonite (CB) as partial replacement of Ordinary Portland Cement (OPC) on the sustainability of self-compacting concrete (SCC). The cement in SCC mixes has been replaced with two different types of CB at 0, 5, 10, 15, 20, 25 and 30% by weight. Slump flow, V-funnel flow time, L-box test and sieve stability tests are performed to evaluate the fresh properties of SCC mixtures. Various tests are used to assess the performance of SCC mixtures in hardened states, such as compressive strength, porosity accessible to water, chloride-ions penetration and gas permeability. The results showed that the use of CB in SCC mixes reduced the fresh properties of SCC and the slump flows, flow times, and segregation tests are good enough for SCC production. At a hardened state, SCC with 10–15% of CB had a higher compressive strength up to 90 days, as well as improved porosity, chloride-ions penetration and gas permeability properties. These results indicate that a CB solution will reduce CO2 emissions and make durable and eco-friendly SCC at a low cost.
KW - Self-compacting concrete
KW - Calcined bentonite
KW - Fresh properties
KW - Strength
KW - Durability
KW - Porosity
KW - Chloride-ions penetration
KW - Gas permeability
UR - http://www.scopus.com/inward/record.url?scp=85072739133&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2019.117062
DO - 10.1016/j.conbuildmat.2019.117062
M3 - Article
AN - SCOPUS:85072739133
SN - 0950-0618
VL - 230
SP - 1
EP - 11
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 117062
ER -