Use of geopolymers for composite external reinforcement of RC members

Menna, Costantino; Asprone, Domenico; Ferone, Claudio; Colangelo, Francesco; Balsamo, Alberto; Prota, Andrea; Cioffi, Raffaele; Manfredi, Gaetano

doi:10.1016/j.compositesb.2012.09.019

Cited by 119 publications

(69 citation statements)

References 31 publications

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“…The synthesis of geopolymers has been carried out starting from a wide variety of virgin raw materials, such as metakaolin [22][23][24], natural clays [25] and other natural silico-aluminates [26], as well as industrial process wastes such as coal fly ash [27][28][29] and metallurgical slag [30]. Geopolymer-based materials are attractive because excellent mechanical properties, high early strength, high durability, freeze-thaw resistance, low chloride diffusion rate, abrasion resistance, thermal stability and fire resistance, can be achieved [31][32][33]. Due to their lower Ca content, they are also more resistant to acid attack than Portland cement-based materials [34].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete

et al. 2013

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Abstract:The correct estimation of building energy consumptions is assuming an always increasing importance, and a detailed reproduction of building structures, with all the single components involved, is necessary to achieve this aim. In addition, the current ecological development tries to limit the use of natural raw materials as building components, in favor of alternative (waste) materials, which ensure significant advantages from the economic, energetic and environmental point of views. In this work, dynamic heat and vapor transport in a typical three-dimensional (3D) building structure, involving different types of environmental-friendly concrete mixtures, have been simulated by using finite elements. In particular, the authors propose to substitute part of the aggregates with plastic waste and to use a fly ash based geopolymeric binder for the production of low conductivity concrete, to be employed in eco-efficient buildings. Concrete produced with natural limestone aggregates has been considered as the reference benchmark. The whole characterization of the different types of concrete tested in the present work has been obtained through laboratory experiments. The structure taken into account in the simulations is a 3D thermal bridge, typical of building envelopes. The thermal and hygrometric transient behavior of this structure, employing plastic waste in different percentages and geopolymer concrete, has been analyzed by the authors.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete

et al. 2013

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“…These materials were first introduced as calcium-free inorganic cements by Davidovits in 1978 4 and since then they have been attracting increasing attention due to their promising characteristics. They have been mainly proposed as more environmentally friendly substitutes of Portland cement 5,6 because of the greater energy efficiency of their manufacturing process and the substantial reduction in CO 2 emissions 7,8 . Following the particular aluminosilicate precursor 3 , the stoichiometric ratio of Si/Al [1,9] , alkali hydroxide and water content 10,11 as well as the reaction temperature, pressure 3 , activation, setting and curing procedures 11,12 , geopolymers can exhibit a wide variety of properties, such as high compressive strength, low shrinkage, fast or slow setting, acid and fire resistance, low thermal conductivity, long term durability and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Geopolymer/PEG Hybrid Materials Synthesis and Investigation of the Polymer Influence on Microstructure and Mechanical Behavior

et al. 2015

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“…There is an ample amount of information available in the literature concerning the behaviour of RC columns wrapped with CFRP, GFRP and AFRP sheet (a few are listed: [1][2][3][4][5][6][7][8][9][10][11][12][13][14]). However, only recently, SFRP sheets have attracted researchers' interest for confinement applications due to the significant enhancement it offers to the RC columns compared to the conventional FRP sheets [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

Abd-Elrahman

El‐Hacha

2014

Polymers

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Abstract:Recently, steel fibre reinforced polymers (SFRP) sheets have been introduced for the repair and rehabilitation of concrete structures. Few researchers studied the behaviour of the concrete columns wrapped with SFRP sheets; however, several critical parameters such as the cost and ductility effectiveness of the SFRP wrapped concrete columns have been lightly addressed. Thus, the main objective of this paper is to study the cost and ductility effectiveness of SFRP wrapped concrete columns and compare the results with the conventionally used carbon FRP (CFRP) wrapped concrete columns. In addition, an analytical procedure to predict the cost effectiveness of SFRP wrapped concrete columns is also suggested, from which, a parametric study was conducted. The parametric study investigated the effect of the concrete strength, the number of SFRP layers, and the size and slenderness effects on the cost effectiveness of the concrete columns wrapped with SFRP sheets. The results from the cost and ductility effectiveness study indicated that the SFRP wrapped concrete columns showed enhanced performance over the CFRP wrapped concrete columns. The suggested analytical procedure proved to be a reliable and accurate method to predict the cost effectiveness parameter of SFRP wrapped concrete columns. The parametric study showed the significant impact of the investigated parameters on the cost effectiveness of concrete columns wrapped with SFRP sheets.

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Use of geopolymers for composite external reinforcement of RC members

Cited by 119 publications

References 31 publications

Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete

Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete

Geopolymer/PEG Hybrid Materials Synthesis and Investigation of the Polymer Influence on Microstructure and Mechanical Behavior

Cost and Ductility Effectiveness of Concrete Columns Strengthened with CFRP and SFRP Sheets

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