Performance of self-compacting mortars with granite sludge as aggregate

Lozano-Lunar, Angélica; Dubchenko, I.; Bashynskyi, S.; Rodero, A.; Fernández, José Antonio Fernández; Jiménez, José Ramón

doi:10.1016/j.conbuildmat.2020.118998

Cited by 27 publications

(12 citation statements)

References 51 publications

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“…For normal water at 1 d, the main phases found were quartz (05-0490) [ 62 ], calcite (05-0586) [ 62 ], dolomite (11-0078), albite (10-0393) [ 85 ], and microline (19-0926) [ 84 ], which agrees with the fundamental composition of NA in Figure 2 . Hatrurite (86-0402) [ 62 ], larnite (33-0302) [ 62 ] from the cement used ( Figure 2 ), portlandite (44-1481) [ 62 ], and ettringite (37-1479) [ 62 ] from the reaction products of Ordinary Portland cement (OPC) [ 87 , 88 ] were also observed. Comparing the phases found using normal or carbonated water as kneading water, a sharp decrease of the phases hatrurite and larnite were observed (Inset Figure 6 labelled “C 3 S and C 2 S”, red colour “1 day normal water”, purple colour “1 day carbonated water”).…”

Section: Resultsmentioning

confidence: 99%

Use of Carbonated Water as Kneading in Mortars Made with Recycled Aggregates

2022

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The increased concern about climate change is revolutionising the building materials sector, making sustainability and environmental friendliness increasingly important. This study evaluates the feasibility of incorporating recycled masonry aggregate (construction and demolition waste) in porous cement-based materials using carbonated water in mixing followed (or not) by curing in a CO2 atmosphere. The use of carbonated water can be very revolutionary in cement-based materials, as it allows hydration and carbonation to occur simultaneously. Calcite and portlandite in the recycled masonry aggregate and act as a buffer for the low-pH carbonated water. Carbonated water produced better mechanical properties and increased accessible water porosity and dry bulk density. The same behaviour was observed with natural aggregates. Carbonated water results in an interlaced shape of carbonate ettringite (needles) and fills the microcracks in the recycled masonry aggregate. Curing in CO2 together with the use of carbonated water (concomitantly) is not beneficial. This study provides innovative solutions for a circular economy in the construction sector using carbonated water in mixing (adsorbing CO2), which is very revolutionary as it allows carbonation to be applied to in-situ products.

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Section: Resultsmentioning

confidence: 99%

Use of Carbonated Water as Kneading in Mortars Made with Recycled Aggregates

2022

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“…Lozano-Lunar et al studied self-compacting properties in SCM, replacing siliceous filler with two types of wastes: granite sludge and electric arc furnace dust as filler, and concluded that when there was an increase in the substitution percentage of both wastes, Rm and Gm values decreased. This behaviour was also attributed to the surface texture and particle size distribution, and the Sp/p ratio had to be increased [ 19 , 59 ]. Benabed et al [ 60 ] and Bosiljko et al [ 61 ] studied self-compactability properties when substituting limestone filler with sand and Portland cement, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The most important characteristic of this is that it flows by the action of its own weight, without the need for vibration energy or any other method of compaction. SCM requires a greater number of fines and the incorporation of superplasticising additives compared to conventional ones, which makes it confer high fluidity properties, giving rise to a finer microstructure, better durability and mechanical properties [ 19 , 20 ]. Because the demand in the use of building materials is increasingly high due to urban growth and the industrial sector, it is necessary to look for sustainable alternatives, both to avoid problems related to the consumption of natural resources and environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Acanthocardia tuberculata Shell Powder as Filler on the Performance of Self-Compacting Mortar

et al. 2023

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In this research, the feasibility of using Acanthocardia tuberculata shell waste from the canning industry in the manufacturing of self-compacting mortar (SCM) was tested. The seashells were finely ground to be used as filler instead of the limestone filler normally used in this type of SCM. First, a physicochemical and microstructural characterisation of all raw materials was carried out, including the particle size distribution of both fillers. Subsequently, the self-compactability properties in the fresh state of SCM were evaluated using a total substitution by volume of limestone filler for seashell powder, using different self-compactiblity parameters. The mineralogical phases of all the SCM tested were identified once hardened by means of X-ray diffraction technique, thermogravimetric and differential thermal analysis. In addition, the mechanical properties, water absorption capacity, dry bulk density and accessible porosity of water of hardened mortars at 28 days of curing were analysed. The effect of replacing limestone filler by Acanthocardia tuberculata filler resulted in a decrease in compressive strength of 29.43, 16.84 and 2.29%, respectively. The results indicate that it is possible to completely replace natural limestone filler with Acanthocardia tuberculata shell filler without significantly affecting the mechanical properties of SCM.

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“…Study of the effects of superplasticizer and silica fume on the fresh and mechanical properties of self-compacting mortars [24]. Lozano-Lunar et al [25] evaluated the replacement of conventional fine aggregate (natural sand) with granite sludge as an alternative for SCM production.…”

Section: Self-compacting Concrete and Sustainabilitymentioning

confidence: 99%

Use of recycled aggregates from civil construction in self-compacting mortar

Valle

Gonçalves

Ranieri

et al. 2022

Rev. IBRACON Estrut. Mater.

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The utilization of wastes from demolition in civil construction in self compacting concrete (SCM) has the potential to reduce both the environmental impact and financial cost. In this context, this article aims to verify the behavior of the incorporation of recycled aggregates of civil construction in the mix designs of self-compacting mortar (SCM) in replacing cement, presenting as an interesting alternative to natural raw materials. This study used the EMMA® software to optimize the choice of percentages of fine recycled aggregates when replacing cement. The proportions chosen were 0%, 5%, 15%, and 25%, through the analysis of the granular packing curve of the respective mix designs. The proportion of 0% has in its composition cement, metakaolin, sand, superplasticizer (SP) and water. The parameters obtained, through tests in the fresh state of the mini-slump and mini-funnel V, certified the samples as SCM. The compressive strength and flexural tensile strength tests in the hardened state demonstrated a reduction in mechanical properties of the material with cement replacement. It is concluded that the waste used brick and ceramic can be added in replacement to the cement in SCM without significant loss of properties in the fresh and hardened state.

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Performance of self-compacting mortars with granite sludge as aggregate

Cited by 27 publications

References 51 publications

Use of Carbonated Water as Kneading in Mortars Made with Recycled Aggregates

Use of Carbonated Water as Kneading in Mortars Made with Recycled Aggregates

The Effect of Acanthocardia tuberculata Shell Powder as Filler on the Performance of Self-Compacting Mortar

Use of recycled aggregates from civil construction in self-compacting mortar

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