Non-structural lightweight concrete with volcanic scoria aggregates for lightweight fill in building’s floors

Bogas, José Alexandre; Cunha, Diogo

doi:10.1016/j.conbuildmat.2016.12.213

Cited by 49 publications

(12 citation statements)

References 26 publications

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“…e properties of fresh and hardened concrete are improved by addition of SCMs, and the cement content is reduced simultaneously [13]. Downrightly, the SCMs' addition improves workability and flow [13], produces less porous and denser concrete which increase resistance to chemical attack [15], shock absorbing ability is enhanced [16,17], and compressive and flexural strengths are enhanced [13].…”

Section: Introductionmentioning

confidence: 99%

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Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

Chambua

Jande

Machunda

2021

Advances in Materials Science and Engineering

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Concrete structures suffer serious deterioration under a corrosive environment. Consequently, the service life of these concrete structures is decreased and deteriorates under combined attack of sulphate and chlorides. Most studies confined on single deteriorating factor such as sulphate attack only or chloride attack only but the current study focused on the influence of natural pumice (NP) and natural scoria (NS) on the strength performance of concrete exposed to the combined attack of sulphate and chloride. Portland cement (PLC) was replaced with NP or NS at a substitution level of 10%. Concrete samples were cured in water for the curing period of 28 days. Afterwards, the specimens were immersed in 5% sodium sulphate (Na2SO4), 5% sodium chloride (NaCl), and combined sodium sulphate and chloride solutions for additional curing of 28, 56, and 90 days. The results were compared between concrete mixes with NP or NS and control mix (CT) with PLC. The effects of sulphate, chloride, and combined sulphate and chloride were evaluated in terms of change in weight, variation in compressive strength, and degree of damage. Conclusively, the application of NP and NS has extraordinary potential to be utilized as a cementitious material in concrete to increase the resistance against aggressive salts.

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Section: Introductionmentioning

confidence: 99%

“…en again, NP and NS have been used as fine and coarse aggregates for nonstructural concrete and mortar [17,26,27].…”

Section: Introductionmentioning

confidence: 99%

Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

Chambua

Jande

Machunda

2021

Advances in Materials Science and Engineering

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“…These are naturally ready to use with mechanical treatment, i.e., crushing and sieving. Mostly, natural LWAs are of volcanic origin, e.g., pumice and scoria [11,12]. Thus, they are only found in a few areas of the world.…”

Section: Natural Aggregatementioning

confidence: 99%

Industrial Wastes-Cum-Strength Enhancing Additives Incorporated Lightweight Aggregate Concrete (LWAC) for Energy Efficient Building: A Comprehensive Review

2021

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Lightweight aggregate concrete (LWAC) exhibits the advantages of thermal insulation, reduces energy consumption building costs, improves building efficiency and easy construction. Furthermore, the utilization of industrial wastes in concrete is advantageous in terms of environmental sustainability. In order to explore this, several researchers investigated the idea of integrating industrial wastes in LWAC. However, the lack of knowledge regarding the performance of industrial waste-based lightweight aggregate concrete hinders the adaptation of this concept and application of LWAC in the construction sector. Therefore, this paper summarizes the research in relation to the sustainable LWACs containing oil palm shell (OPS), lightweight expanded clay aggregate (LECA), vermiculite, perlite, pumice and sintered fly ash as lightweight aggregate, along with industrial wastes and strength-enhancing additives (viz. fibers, polymers, etc.). Firstly, desirable physical, chemical, morphological and mineralogical characterization of different lightweight aggregates are presented, and then a comprehensive overview on fresh, hardened, durability and thermal properties of LWAC incorporating industrial wastes are discussed in comparison with normal weight concrete. The review also highlights the current challenges and suggests the research gaps for further development of eco-friendly LWAC. It is concluded that vermiculite, perlite, pumice, OPS, sintered fly ash and LECA with some suitable industrial waste materials have the potential to be used in the construction sector. Moreover, LWAC with industrial waste has 50–65% lower carbon emission (kg CO2 eq/m3) in the environment. The scientific contribution of this paper provides insights into different LWACs and the knowledge base for future research and paradigm shift of using LWACs as more common alternative building materials.

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“…Concerning the thermal behavior of traditional building structures involving LECA aggregate against elevated temperatures, a number of studies have been explored on this issue. Of them, Bogas and Cunha (2017) examined the compressive strength results of concrete specimens containing LECA coarse aggregate of size 4-8 mm diameter, cement of 130 kg/m 3 , and lime of 280 kg/m 3 after exposure to 200, 400, 600, and 800 °C for 1 h. They concluded that the strength was reduced by 8.62%, 22.4%, 34.48%, and 51.7%, respectively, relative to their counterpart before exposure. Bodnárová et al (2014) concluded that concrete manufactured with LECA aggregate of sizes 1-4 and 4-8 mm did not suffer any degradation when exposed to high temperature, in accordance with temperature time curve ISO 834.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the performance of lightweight mortar-based geopolymer containing high-volume LECA aggregate against high temperatures

Ouda

Rashad

2021

Environ Sci Pollut Res

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The influence of lightweight expanded clay aggregate (LECA) on the physico-mechanical properties and microstructure of geopolymer mortar containing slag binder alkali-activated with sodium silicate solution before and after exposure to thermal loads was investigated. In the current procedure, siliceous sand was partially substituted with LECA fine aggregate at levels of 0%, 25%, 50%, 75%, and 100%, by volume. The effect of LECA on the performance before exposure was evaluated by measuring flowability, water absorption, bulk density, thermal conductivity, and compressive strength. To monitor the behavior after exposure, a batch of specimens having the same composition was subjected to high temperatures in the range of 400-1000 °C for 2 h with a heating rate of 5 °C/min. In a similar fashion, mass loss and residual compressive strength were determined. New phase-based geopolymers were examined using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The findings indicated that the incorporation of LECA up to 100% as an alternative to siliceous sand aggregate in geopolymer mortar has an adverse effect on compressive strength and water absorption, but has a positive effect on workability, thermal conductivity, and relative strength after exposure to elevated temperatures.

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Non-structural lightweight concrete with volcanic scoria aggregates for lightweight fill in building’s floors

Cited by 49 publications

References 26 publications

Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

Strength and Durability Properties of Concrete Containing Pumice and Scoria as Supplementary Cementitious Material

Industrial Wastes-Cum-Strength Enhancing Additives Incorporated Lightweight Aggregate Concrete (LWAC) for Energy Efficient Building: A Comprehensive Review

An investigation on the performance of lightweight mortar-based geopolymer containing high-volume LECA aggregate against high temperatures

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