Scientific and technical aspects of blended cement matrices containing activated slate wastes

Frías, Moisés; Villa, Raquel Vigil de la; García, Ramón Lanza; Soto, Isabel de; Medina, César; Rojas, M.I. Sánchez de

doi:10.1016/j.cemconcomp.2014.01.002

Cited by 27 publications

(16 citation statements)

References 27 publications

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“…Strength was lower in the materials bearing granite quarry dust, due primarily to two factors: i) increase in total porosity (see Table 3), with a larger volume of macropores, the fraction with the heaviest impact on mechanical strength [24]; and ii) the quarry dust's slow pozzolanic reaction rate [16,19]. That behaviour was also observed in previous studies when additions of a similar nature, namely ornamental stone such as marble [25] or slate [26] or others characterised by low reactivity such as copper slag [27], fly ash [28,29] or silico-manganese slag [30], were added to cement. The strength values nonetheless showed that the new cements met the strength requirements laid down in the standards in place for strength class 42.5 MPa [18].…”

Section: Mechanical Strengthsupporting

confidence: 69%

Durability of new recycled granite quarry dust-bearing cements

Medina

Bosque

Frías

et al. 2018

Construction and Building Materials

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Imperative to the design of new cements that bear different types of waste as additions is a parallel study of the mechanical strength and durability of the new materials to ensure their performance will be satisfactory throughout their service life. This study explored the effect of adding 10 % or 20 % granite quarry dust to cement on properties such as transport (total and capillary water absorption and electrical resistivity), dimensional stability (drying shrinkage and expansion), the alkali-silica reaction, heat of hydration and colour. No alkali-silica reaction was observed in the new materials and expansion and contraction were less intense than in conventional cement. The water absorption and capillary absorption coefficients rose less in the additioned cements than the replacement ratio, whilst their higher resistivity values afforded greater corrosion protection than found in the reference. The inclusion of this waste also prompted a rise in lightness and a decline in peak heat of hydration. The multivariate analysis of variance (MANOVA) conducted showed that the factors time and replacement ratio affected the properties significantly, whereas the combined effect of the two was statistically significant or otherwise depending on the property analysed. The findings showed that the partial replacement of cement with quarry dust is not detrimental to product durability and the recycled material qualifies as a strength class 42.5, type II/A. Adittionally, the binders bearing 20 % granite quarry dust meet the requirements to qualify as low heat cements (CEM II/A LH).

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Section: Mechanical Strengthsupporting

confidence: 69%

Durability of new recycled granite quarry dust-bearing cements

Medina

Bosque

Frías

et al. 2018

Construction and Building Materials

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“…In addition, this behavior coincides with the behavior described by Frías et al [21] and Vardhan et al [22] in their studies on slate and marble quarry sludge, respectively, in the manufacture of new cements. An addition of 20% seems to improve the conditions of compressive strength compared to one of 10%.…”

Section: Resultssupporting

confidence: 90%

Reusing Discarded Ballast Waste in Ecological Cements

García

Gaya

2019

Materials

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Numerous waste streams can be employed in different cement production processes, and the inclusion of pozzolans will, moreover, permit the manufacture of concrete with improved hydraulic properties. Pozzolanic materials can be added to Ordinary Portland Cement (OPC) in the range of 10%–20% by mass of cement. One such example is the phyllosilicate kaolinite (K), and its calcined derivative metakaolin (MK), incorporated in international cement manufacturing standards, due to its high reactivity and utility as a pozzolan. In the present paper, discarded ballast classed as Construction and Demolition Waste (C&DW) is reused as a pozzolanic material. Various techniques are used to characterize its chemical, mineralogical, and morphological properties, alongside its mechanical properties, such as compressive and flexural strength. Discarded ballast in substitution of cement at levels of 10% and 20% produced type II or IV pozzolanic cements that yielded satisfactory test results.

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“…Manufacturing of these building components generates great amounts of wastes coming from extraction and cutting such as dust and chips which have been recently considered as reinforcing materials in particle filled polymer composites [2][3][4] and cement mortars [5,6]. The slate fiber composition [4,5,[7][8][9]] is similar to that of glass and basalt fibers, being the main components Al 2 O 3 , SiO 2 , CaO, MgO, K 2 O, Fe 2 O 3 [10,11].…”

Section: Introductionmentioning

confidence: 99%

New environmentally friendly composite laminates with epoxidized linseed oil (ELO) and slate fiber fabrics

Samper

Petrucci

Sànchez-Nácher

et al. 2015

Composites Part B: Engineering

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ElsevierSamper Madrigal, MD.; Petrucci, R.; Sánchez Nacher, L.; Balart Gimeno, RA.; Kenny, JM. (2015). New environmentally friendly composite laminates with epoxidized linseed oil (ELO) and slate fiber fabrics. Composites Part B: Engineering. 71:203-209. doi:10.1016Engineering. 71:203-209. doi:10. /j.compositesb.2014 . 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 2 to improved mechanical performance but glycidyl silane treatment produces the optimum results as the interactions between silanized slate fiber and epoxidized linseed oil are remarkably improved as observed by scanning electron microscopy (SEM).

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Scientific and technical aspects of blended cement matrices containing activated slate wastes

Cited by 27 publications

References 27 publications

Durability of new recycled granite quarry dust-bearing cements

Durability of new recycled granite quarry dust-bearing cements

Reusing Discarded Ballast Waste in Ecological Cements

New environmentally friendly composite laminates with epoxidized linseed oil (ELO) and slate fiber fabrics

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