Use of Waste Glass as A Replacement for Raw Materials in Mortars with a Lower Environmental Impact

Letelier, Viviana; Henríquez-Jara, Bastián I.; Manosalva, Miguel; Parodi, Camila; Ortega, José Marcos

doi:10.3390/en12101974

Cited by 45 publications

(21 citation statements)

References 30 publications

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“…On the other hand, when the w/b increased from 0.4 to 0.6, both compressive and flexural strengths decreased by 29%. The enhancement of the mechanical properties by the addition of silica fume can be explained by the pore-filling effect (i.e., the capillary pores are filled with ultrafine particles) and the pozzolanic reaction [41,42]. This positive effect of the silica fume addition was more pronounced in compressive strength than in flexural strength, as reported previously [43].…”

Section: Mechanical Properties and Weight Changesupporting

confidence: 72%

Quantitative Analysis of CO2 Uptake and Mechanical Properties of Air Lime-Based Materials

2019

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In the cement industry, utilization of a sustainable binder that has a lower energy consumption and carbon dioxide (CO2) emission than Portland cement is becoming increasingly important. Air lime is a binder that hardens by absorbing CO2 from the atmosphere, and its raw material, hydrated lime, is manufactured at a lower temperature (around 900 °C) than cement (around 1450 °C). In this study, the amount and rate of CO2 uptake by air lime-based materials are quantitatively evaluated under ambient curing conditions of 20 °C, 60% relative humidity, and 0.04% CO2 concentration. In addition, the effects of the water-to-binder ratio (w/b) and silica fume addition on the material properties of the air lime mortar, such as strength, weight change, carbonation depth, and pore structure, are investigated. Unlike hydraulic materials, such as Portland cement, the air lime mortar did not set and harden under a sealed curing condition, however, once exposed to dry air, the mortar began to harden by absorbing CO2. During the first week, most of the internal water evaporated, thus, the mortar weight was greatly reduced. After that, however, both the weight and the compressive strength consistently increased for at least 180 days due to the carbonation reaction. Based on the 91-day properties, replacing 10% of hydrated lime with silica fume improved the compressive and flexural strengths by 27% and 13% respectively, whereas increasing the w/b from 0.4 to 0.6 decreased both strengths by 29% due to the increased volume of the capillary pores. The addition of silica fume and the change in the w/b had no significant impact on the amount of CO2 uptake, but these two factors were effective in accelerating the CO2 uptake rate before 28 days. Lastly, the air lime-based material was evaluated to be capable of recovering half of the emitted CO2 during the manufacture of hydrated lime within 3 months.

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Section: Mechanical Properties and Weight Changesupporting

confidence: 72%

Quantitative Analysis of CO2 Uptake and Mechanical Properties of Air Lime-Based Materials

2019

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“…of structures [45]. In this sense, these materials seek to improve the physical, mechanical and thermal properties [46], often using recyclable materials [47,48]. Based on this, this work proposes to carry out a sensitivity study of the radiative and thermal properties of building materials in the urban microclimate, varying their magnitudes and verifying their impact on the variation of UHI intensity, using mesoscale atmospheric models.…”

Section: Study Areamentioning

confidence: 99%

“…Also, these materials have sought to reduce the environmental impact of the building industry by including aggregate materials in the composition of structures [45]. In this sense, these materials seek to improve the physical, mechanical and thermal properties [46], often using recyclable materials [47,48].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Radiative and Thermal Properties of Building Material in the Urban Atmosphere

et al. 2019

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In the context of the impact of urbanization on climate change, this work aims to evaluate the sensitivity of the thermal and radiative properties of building surfaces in urban areas to the urban heat island intensity, a local scale meteorological phenomenon. For this, variations of albedo values, emissivity, thermal conductivity and heat capacity of roofs, streets and walls were simulated through an urban scheme coupled with the BRAMS mesoscale atmospheric model for the metropolitan area of São Paulo, considering two main urban types. The simulations show that, in general, looking for cold surface situations, the change of building material can contribute to a reduction of up to 3 °C for São Paulo. In addition, the role of orientation and the typological characteristics of constructions should be taken into account. In this sense, it is expected that this work guides civil engineers and builders to search for new materials in order to reduce the effects of urbanization on the local climate.

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“…Furthermore, the presence of reacted cenosphere grains in the form of degraded surfaces of spheres was found, which was a result of gas release from the interior of particles. Another source of silicates and aluminates is the glass powder [10][11][12]. Many authors indicate the pozzolanic character of the glass powder revealed in cement materials, as well as its negative impact on the life of cement materials as a result of alkali reactions (ASR-alkali silica reaction) [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Another source of silicates and aluminates is the glass powder [10][11][12]. Many authors indicate the pozzolanic character of the glass powder revealed in cement materials, as well as its negative impact on the life of cement materials as a result of alkali reactions (ASR-alkali silica reaction) [10][11][12]. In geopolymers, alkalis have a positive effect on the their hardening, the shaping of properties and curing [2].…”

Section: Introductionmentioning

confidence: 99%

Properties of geopolymers from conventional fly ash activated at increased temperature with sodium hydroxide containing glass powder obtained from the recycling of waste glass

Janowska-Renkas

Kaliciak

2020

MATEC Web Conf.

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This paper presents test results of the physical and mechanical properties of geopolymers based on conventional fly ash activated at increased temperature with sodium hydroxide, containing glass powder obtained from the recycling of waste glass. Tests were performed on mortars of a geopolymer binder containing glass powder of various levels of fineness, at quantities ranging from 5 to 95% of the mass of the conventional fly ash. The properties of the geopolymer binder with and without the content of glass powder were determined on the basis of the heat of hydration. The suitability of the application of glass powder in geopolymers was confirmed by results of testing the following parameters using a scanning electron microscope (SEM) and analysis of micro areas (EDS) in geopolymer materials: particle size distribution, density, porosity, X-ray diffraction (XRD). Testing of the compressive strength of the geopolymer mortars was performed after: 1, 7, 14 and 28 days of curing in air-dry conditions. Results of microstructure tests confirm that the glass powder coming from recycled waste glass in presence of the geopolymer binder undergoes reactions of alkaline activation at increased temperature, the products of which are zeolite minerals and sodium silicate gel. On the basis of test results of physical and mechanical properties of the geopolymers, it was proven that the content of glass powder had a beneficial effect on the utility parameters of the obtained material. The aforementioned research confirms the possibility of using waste glass for the production of geopolymer materials applied in the construction industry.

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Use of Waste Glass as A Replacement for Raw Materials in Mortars with a Lower Environmental Impact

Cited by 45 publications

References 30 publications

Quantitative Analysis of CO2 Uptake and Mechanical Properties of Air Lime-Based Materials

Quantitative Analysis of CO2 Uptake and Mechanical Properties of Air Lime-Based Materials

Sensitivity of Radiative and Thermal Properties of Building Material in the Urban Atmosphere

Properties of geopolymers from conventional fly ash activated at increased temperature with sodium hydroxide containing glass powder obtained from the recycling of waste glass

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