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Strength, durability and micro-structural aspects of high performance volcanic ash concrete
This paper presents the results of investigations to assess the suitability of using volcanic ash (VA) as a cement replacement material to produce high performance concrete. Tests were conducted on concrete mixtures replacing 0% to 20% by mass of ordinary Portland cement (OPC) by VA. The performance of high performance volcanic ash concrete (HPVAC) mixtures was evaluated by conducting comprehensive series of tests on fresh and hardened properties as well as durability. The mechanical properties were assessed by compressive strength, while durability characteristics were investigated by rapid chloride permeability (RCP), drying shrinkage (DS), mercury intrusion porosimetry (MIP), differential scanning calorimetry (DSC) and microhardness tests. HPVACs showed better durability properties compared to control concrete with 0% VA. The improved performance of HPVACs was attributed to the refinement of pore structure, and pozzolanic action of VA. HPVAC having a minimum 28-day compressive strength of 60 MPa can be obtained by replacing up to 20% (by mass) of cement by VA. Development of non-expensive and environmentally friendly HPVAC with acceptable strength and durability characteristics (as illustrated in this study) is extremely helpful for the sustainable development and rehabilitation of volcanic disaster areas around the world.
Strength, durability and micro-structural aspects of high performance volcanic ash concrete
This paper presents the results of investigations to assess the suitability of using volcanic ash (VA) as a cement replacement material to produce high performance concrete. Tests were conducted on concrete mixtures replacing 0% to 20% by mass of ordinary Portland cement (OPC) by VA. The performance of high performance volcanic ash concrete (HPVAC) mixtures was evaluated by conducting comprehensive series of tests on fresh and hardened properties as well as durability. The mechanical properties were assessed by compressive strength, while durability characteristics were investigated by rapid chloride permeability (RCP), drying shrinkage (DS), mercury intrusion porosimetry (MIP), differential scanning calorimetry (DSC) and microhardness tests. HPVACs showed better durability properties compared to control concrete with 0% VA. The improved performance of HPVACs was attributed to the refinement of pore structure, and pozzolanic action of VA. HPVAC having a minimum 28-day compressive strength of 60 MPa can be obtained by replacing up to 20% (by mass) of cement by VA. Development of non-expensive and environmentally friendly HPVAC with acceptable strength and durability characteristics (as illustrated in this study) is extremely helpful for the sustainable development and rehabilitation of volcanic disaster areas around the world.
Strength, durability and micro-structural aspects of high performance volcanic ash concrete
Festigkeit, Dauerhaftigkeit und Mikrostruktur-Eigenschaften von Hochleistungs-Beton aus Vulkanasche
Hossain, K.M.A. (Autor:in) / Lachemi, M. (Autor:in)
Cement and Concrete Research ; 37 ; 759-766
2007
8 Seiten, 31 Quellen
Aufsatz (Zeitschrift)
Englisch
Strength, durability and micro-structural aspects of high performance volcanic ash concrete
| British Library Online Contents | 2007
Strength, durability and micro-structural aspects of high performance volcanic ash concrete
| Online Contents | 2007
Residual Strength and Durability of Volcanic Ash Concrete Exposed to High Temperature
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Residual Strength and Durability of Volcanic Ash Concrete Exposed to High Temperature
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Development of Volcanic Ash Concrete: Strength, Durability, and Microstructural Investigations
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