Mechanical properties and durability of mortar and concrete containing natural pozzolana and limestone blended cements |
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| Affiliation: | 1. Civil Engineering Department, University of Chlef, Algeria;2. Geomaterials Laboratory, Civil Engineering Department, University of Blida, P.O. Box 270, Blida, Algeria;3. Civil Engineering Department, University of Tiaret, Algeria;1. Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Selangor 43600, Malaysia;2. Department of Civil Engineering, Dhaka University of Engineering & Technology, Gazipur 1707, Bangladesh;1. Batman University, Engineering Faculty, Department of Civil Engineering, Batman, Turkey;2. Inonu University, Engineering Faculty, Department of Civil Engineering, Malatya, Turkey;3. Harran University, Engineering Faculty, Department of Civil Engineering, Sanliurfa, Turkey;1. Department of Civil and Environmental Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;2. Research Institute, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia;1. School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ 85287, United States;2. Laboratory for the Chemistry of Construction Materials, Department of Civil and Environmental Engineering, University of California, Los Angeles, CA 90095, United States;1. Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720, USA;2. King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia |
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| Abstract: | The benefits of limestone filler (LF) and natural pozzolana (NP) as partial replacement of Portland cement are well established. Economic and environmental advantages by reducing CO2 emission are well known. However, both supplementary materials have certain shortfalls. LF addition to Portland cement causes an increase of hydration at early ages inducing a high early strength, but it can reduce the later strength due to the dilution effect. On the other hand, NP contributes to hydration after 28 days improving the strength at medium and later ages. Hence, ternary blended cement (OPC–LF–NP) with better performance could be produced. In this paper, mortar prisms in which Portland cement was replaced by up to 20%LF and 30%NP were tested in flexure and compressive strength at 2, 7, 28 and 90 days. Some samples were tested under sulfate and acid solutions and for chloride ions permeability. Results show that the use of ternary blended cement improves the early age and the long-term compressive and flexural strengths. Durability was also enhanced as better sulfate, acid and chloride ions penetration resistances were proved. |
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