Strength, Carbon Footprint and Cost Considerations of Mortar Blends with High Volume Ground Granulated Blast Furnace Slag

Onn, Chiu Chuen; Mo, Kim Hung; Radwan, Mohammed K.H.; Liew, Wen Hong; Ng, Chee Guan; Yusoff, Sumiani

doi:10.3390/su11247194

Cited by 40 publications

(19 citation statements)

References 27 publications

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“…Therefore, high volume SCM-based blends had a lower amount of hydration products, and this resulted in compressive strength values, which were lower than those of the reference blends at the age of 28 days. Similar observations were noted by Onn et al [48]. The main contributing factor in the strength decrease was the dilution effect, i.e., lower initial hydraulic reactivity, as SCMs hydrate at a slower rate compared to cement.…”

Section: Compressive Strength Of Hardened Mortar and Achieved Classsupporting

confidence: 87%

Sustainable Masonry Mortars with Fly Ash, Blast Furnace Granulated Slag and Wheat Straw Ash

et al. 2021

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Due to greenhouse gas emissions, the production of cement clinker is considered unsustainable and many attempts are being made to replace cement with alternative materials sourced from agriculture, industry and other urban practices, such as construction and demolition works. The aim of this paper is to analyze the effects of cement substitution by locally available waste materials in Serbia, such as fly ash (FA), blast furnace granulated slag (BFGS) and wheat straw ash (WSA), up to the 50% replacement volume rate in cement–lime mortars. As the effective application of supplementary cementitious materials (SCMs) in cement-based materials requires a comprehensive insight into their properties, a characterization of materials involving all relevant physical, chemical and mechanical tests is conducted. Ten different mortar mixed with ingredients of a volume ratio 1:2:4 (cementitious powder/lime/sand) were designed and their consistency, bulk density, capillary water absorption, flexural strength, compressive strength and thermal analysis (TGA/DTA) results were examined to determine the influence of the abovementioned SCMs on mortar properties. Research findings highlight the possibility of replacing cement with slag (50%), fly ash (30%) or wheat straw ash (30%) while maintaining its performance and improving the economic and environmental impacts of masonry mortar production.

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Section: Compressive Strength Of Hardened Mortar and Achieved Classsupporting

confidence: 87%

Sustainable Masonry Mortars with Fly Ash, Blast Furnace Granulated Slag and Wheat Straw Ash

et al. 2021

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“…The above discussions on compressive strength reveal that the GGBS and M-sand substitution in self-compacting concrete not only helps in reducing carbon dioxide emission into the environment but also increases the strength of self-compacting concrete. The Life Cycle Impact Assessment (LICA) Analysis of High volume GGBS has been carried out by Chiu et al which suggests that the higher cement replacement level with GGBFS will give a better compressive strength/carbon footprint ratio [20].…”

Section: Compressive Strengthmentioning

confidence: 99%

Study on Self-Compacting Concrete with Sustainable Materials

Leelavathi¹,

Sudalaimani²

2021

Pol. J. Environ. Stud.

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The current study experimentally probes into the possibilities of using M-sand with ground granulated blast furnace slag in Self-Compacting Concrete (SCC). The Ground granulated blast furnace slag is a by-product material obtained through the blast-furnaces used to make iron. Dumping of this waste material near to the industries creates land pollution. The research analyses the potential of GGBS when it is added at 10, 20, 30, 40 and 50% by weight instead of cement in the preparation of SCC. M-sand was also used instead of natural fine aggregate at 20, 40, 60 and 80% by weight. An evaluation of the Fresh and hardened properties of the samples was also done. Efforts were made to study in detail the microstructure of the SCC specimens by subjecting it to Scanning Electron Microscope (SEM) and Energy Dispersive X ray Analyzer (EDAX) analysis. In order to achieve the required flow parameters, superplasticizer was added. Likewise, fly ash (FA) was employed as an additional mineral admixture to the components. The results revealed that the inclusion of M-sand with the GGBS increases the compressive strength of SCC to about 55.55 MPa with 20% replacement of GGBS which helps to reduce the CO 2 emission due to cement industries.

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“…• The material cost for concrete mixtures of 30% BFS is RM177.72 /m 3 (Onn et al 2019). The total cost is RM293.14, including labour and plant and machinery.…”

Section: General Boundaries and Limitationsmentioning

confidence: 99%

Untitled

2021

BEJ

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Carbon emission is released into the atmosphere as the result of various activities due to rapid urbanisation and thus contributed to global warming and climate change. The government has taken various initiatives to reduce the impact, including from the construction industry in order to support the carbon footprint reduction of 40% as pledged by the Prime Minister. Various strategies, such as the Malaysian Carbon Reduction and Environmental Sustainability Tool (MyCREST), have been established to promote green building development in Malaysia. Recent studies suggested that the selection of sustainable materials can reduce the overall carbon emission of a building, but the cost has been identified as the main barriers. This paper aims to analyse the potential of carbon footprint reduction by using sustainable material in mid-rise residential building and subsequently to evaluate the cost implication. The impact of the conventional and the selected sustainable materials was assessed using data from the MyCREST tool while the data for cost analysis were taken from various sources of cost data such as JKR Rates online (RATOL), JKR Sarawak Schedule of Rates (SOR), and previous research. The results show that the sustainable materials such as 30% of Blast Furnace Slag (BFS) concrete mixture, Aerated Autoclaved Concrete (AAC) block, and recycled steel roof truss has the potential to reduce the carbon emission. The findings also show that sustainable materials are slightly cheaper than the conventional materials except for the AAC block and clay roof tiles. Therefore, the potential of carbon emission reduction approach by using MyCREST as a guideline tool can assist in the reduction of the environmental impact of buildings.

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Strength, Carbon Footprint and Cost Considerations of Mortar Blends with High Volume Ground Granulated Blast Furnace Slag

Cited by 40 publications

References 27 publications

Sustainable Masonry Mortars with Fly Ash, Blast Furnace Granulated Slag and Wheat Straw Ash

Sustainable Masonry Mortars with Fly Ash, Blast Furnace Granulated Slag and Wheat Straw Ash

Study on Self-Compacting Concrete with Sustainable Materials

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