Developing high performance concrete for precast/prestressed concrete industry
| Autor: | Hala K. Elia, Amin K. Akhnoukh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Silica fume
Materials Science (miscellaneous) 0211 other engineering and technologies Superplasticizer 020101 civil engineering 02 engineering and technology Civil engineering 0201 civil engineering law.invention Portland cement Compressive strength Prestressed concrete law Precast concrete 021105 building & construction lcsh:TA401-492 Environmental science lcsh:Materials of engineering and construction. Mechanics of materials Cementitious Mortar |
| Zdroj: | Case Studies in Construction Materials, Vol 11, Iss, Pp-(2019) |
| ISSN: | 2214-5095 |
| Popis: | High performance concrete (HPC) is a new class of concrete that has superior characteristics compared to conventional concrete. Despite of its superior characteristics, HPC is not widely used in local and international markets due to its high constituent materials cost.This paper presents the research done to develop economic HPC mixes using local materials and conventional mixing and curing techniques. HPC characteristics were attained using supplementary cementitious materials as silica fume and class C fly in partial replacement of Portland cement. Superplasticizers were used to maintain a high flowing ability using a low water-to-powder ratio. Concrete mixes were produced using a high energy mixer to maintain sufficient mix consistency. As a result, concrete mixes with 24 -h compressive strength of 70 MPa and 28-day strength of 105 MPa were produced. Concrete samples tested for expansion using accelerated mortar bar test (AMBT) showed that developed concrete is not susceptible to alkali-silica reaction. Improved characteristics can be used in improving the performance of concrete construction projects, reduce required maintenance, and increase construction projects life-span. Keywords: Class C fly ash, Silica fume alkali-silica reaction, Precast concrete, High performance concrete |
| Databáze: | OpenAIRE |
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