Carbon dioxide sequestration on mortars containing recycled aggregates

Mastali, Mohammad; Abdollahnejad, Zahra; Pacheco-Torgal, F.

doi:10.1016/b978-0-12-819946-6.00007-2

Cited by 1 publication

(3 citation statements)

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“…compression and bending strength of the composites and do not change the resistance of geopolymers to high temperatures and acids [29]. The authors [37] used short hemp fibres (20-30 mm in size) in the amount of 4%, 6% and 8% of the weight of the composite and fly ash from PEGO CHP plant in Portugal. Significant decrease in mechanical properties was observed for 8% hemp fibre addition, decrease in compression strength after 28 days 45 MPa obtained for matrix to 12 MPa for samples with hemp fibre addition, and for bending strength -decrease from 3.4 MPa for pure matrix to 2.1 MPa.…”

Section: Geopolymer Composites -Raw Materialsmentioning

confidence: 99%

“…Hemp (Cannabis sativa) is one of the most commonly used cellulose fibres as reinforcement in various types of composites [33]. Their main advantages are the rapid growth of plants from which the fibres are obtained (only 3.5 months) and high production of dry biomass from the arable area [35,36,37].…”

Section: Geopolymer Composites -Raw Materialsmentioning

confidence: 99%

“…The foaming substance was a silicon metallic powder. Another geopolymer matrix, for which the short-fibre reinforcement was used, was a matrix based on: fly ash (coming from the PEGO thermal power plant in Portugal), glass waste and Portland cement as well as recycled aggregates [37].…”

Section: Geopolymer Composites -Raw Materialsmentioning

confidence: 99%

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The Fly-Ash Based Geopolymer Composites as an Innovative Material for Circular

et al. 2020

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A circular economy is the answer to the problem of wasting raw materials and increasing environmental pollution. It is based on the effective use of materials - from extraction, through use, to the way of managing waste. Analyzing the impact of particular industries on the production of pollution, it can be concluded that the construction is one of such industries. In order to reduce the negative impact of the construction on the environment resulting from energy consumption and large amounts of generated waste, various researches are carried out on modern and innovative materials production solutions. One of the possibilities is a production technology based on the alkaline-activated compositions and geopolymers. The advantage of this technology is that it has a much lower carbon footprint compared to the traditional production methods used in construction - during the synthesis of geopolymers the emission of CO2 is 4-8 times lower and also the energy consumption is reduced up to 2-3 times. This article shows the possibility of using the industrial and mining waste for creating new eco-friendly materials – geopolymers. The paper presents the results of studies on geopolymer composites reinforced with addition of 1% by weight of different types of natural fibers i.e.: short hemp fibres, raw flax fibres (shortened), long flax fibres (stannous) and linseed cotonin. The paper showed that geopolymer composites can be successfully produced with the addition of natural fibres (often waste) and have good strength parameters even after long-term use.

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Section: Geopolymer Composites -Raw Materialsmentioning

confidence: 99%