Effect on the Compressive Strength of Mortars Using Ground Granulated Blast Furnace Slag as a Partial Replacement of Cement

Sandhu, Abdul Razzaque; Rind, Touqeer Ali; Kalhoro, S. A.; Lohano, Rahol; H., Laghari, F.

doi:10.2478/jaes-2019-0025

Cited by 7 publications

(7 citation statements)

References 25 publications

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“…Pozzolanic reactions occur much more slowly and are not expected during the early phase of hydration. During the early hydration phase of a cement substitute, the addition of GGBFS provides an active surface for the nucleation of hydration products, which may accelerate the early hydration of the cement itself [21][22][23] The effects of adding GGBFS on the mechanical properties of cement mortars, up to 28 days of hydration, were studied by Abdul S. et al They found that a small addition of GGBFS, up to 10 wt.%, increased the compressive strength, and a larger addition decreased the compressive strength. They found that sand behaved as an inert filler with a weak interfacial zone between the cement paste and sand.…”

Section: Introductionmentioning

confidence: 99%

The Influence of GGBFS as an Additive Replacement on the Kinetics of Cement Hydration and the Mechanical Properties of Cement Mortars

Jozić,

Ljubičić,

Petrović

et al. 2023

Buildings

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Granulated blast furnace slag (GBFS) is a byproduct of the iron production process. The objective of this study is to determine the effects of ground granulated blast furnace slag (GGBFS), used as a replacement admixture (0–40 wt.%) for ordinary Portland cement (OPC), on the setting time, the heat of hydration, and the mechanical properties of cement mortar. The influence of GGBFS as a replacement additive on the setting time shows that it has an accelerating effect on cement hydration. Calorimetric measurements were performed on the cement paste system to determine the effects of GGBFS on the hydration of OPC. Calorimetric measurements carried out show that the replacement of GGBFS in an amount up to 40 wt.% reduces the total heat of hydration by up to 26.36% compared to the reference specimen. The kinetic analysis performed on the calorimetric data confirms the role of GGBFS as an accelerator by shortening the time during which the process of nucleation and growth (NG), as the most active part of hydration, is reduced up to 2.5 h. The value of the Avrami–Erofee constant indicates polydispersity and heterogeneous crystallization. Mechanical tests of cement mortars were performed after 3, 7, 14, 28, 70, and 90 days of hydration and showed that replacement addition of GGBFS slightly reduced the mechanical properties in the early phase of hydration, while in the later phase of hydration it contributed to an increase in the mechanical properties.

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Section: Introductionmentioning

confidence: 99%

The Influence of GGBFS as an Additive Replacement on the Kinetics of Cement Hydration and the Mechanical Properties of Cement Mortars

Jozić,

Ljubičić,

Petrović

et al. 2023

Buildings

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“…It was reported that the 28-day compressive strength of the control mortar increased from 97.0 MPa to 108.0 MPa upon a 15% replacement of OPC with GGBFS. Similarly, Sandhu et al [10] produced mortars by replacing OPC with GGBFS at 0%, 5%, 10%, 15%, and 20% contents. It was mentioned that the 28-day compressive strength of the control mortar increased from 26.3 MPa to 32.7 MPa and 29.8 MPa when 5% and 10% of the cement were substituted with GGBFS, respectively.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Blast Furnace Slag as an Enhancer in Masonry Mortars Made with Thermally Treated Waste Concrete Powder

Ohemeng,

Ramabodu,

Nena

2023

Buildings

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Every year, a massive amount of natural materials are subjected to high temperatures during cement production, resulting in 5% to 8% of total global carbon dioxide (CO2) emissions. The employment of supplementary cementitious materials (SCMs) for developing construction materials could reduce the use of natural materials and CO2 emissions during cement manufacturing. One option to accomplish this is to examine the possibility of producing masonry mortars using thermally treated waste concrete powder (WCP) and ground granulated blast furnace slag (GGBFS). The main objective of the present study is based on this. The study was conducted in two phases. In Phase I, WCP was thermally treated at various temperatures of 0 °C, 300 °C, 500 °C, and 700 °C and then used to prepare mortars at a binder-to-fine aggregate ratio of 1:3. From the strength results obtained in Phase I, a mortar mixture made with 500 °C WCP was selected for Phase II investigation. Mortars were produced by replacing the 500 °C WCP with GGBFS at 0%, 25%, 40%, 60%, 70%, and 85%. It was found that the performance of the mortars was enhanced when GGBFS was used up to 60%. The mortar mixture containing 60% thermally treated WCP and 40% GGBFS produced the optimal physical and mechanical properties. Also, material characterization was carried out on the binders using X-ray fluorescence, scanning electron microscopy, and thermogravimetric analysis. The results indicate that the thermally treated WCPs and GGBFS contain oxides similar to cement, making them suitable for mortar production. In conclusion, the study has shown the feasibility of producing masonry mortars using thermally treated WCP and GGBFS.

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“…To reduce the amount of cement in the grout mixture, the authors of the work [13] propose to use crushed granulated blast-furnace slag. Research confirms that cement stone, which contains 10% granulated blast-furnace slag as a substitute for cement, does not lose strength.…”

Section: Introductionmentioning

confidence: 99%

Development of composition of cementing slurry for fastening of low-cemented rocks

Kondrat¹,

Dremliukh²,

Khaidarova³

2021

Min. miner. depos.

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Purpose. Improving the producing capacity and ensuring the stable operation of gas wells that develop unstable, low-cemented reservoirs by preventing the sand entry from the reservoir by means of creating the cement stone with the corresponding values of strength and permeability in the bottomhole formation zone. Methods. The technological characteristics of the cementing slurry and the formed cement stone are measured using standard recording equipment. The cementing slurry consistency is measured with a pycnometer, the cement mixture spread ability – using AzNII cone, water separation is measured according to standard methods (DSTU BV.2.7 – 86-99), and the time of the cementing slurry hardening is determined on a consistometer KTS-3. The ultimate parameters of the stone strength during bending are determined on a special device for testing linear objects in tension, and compression – on a PSU-10 hydraulic press. Findings. The cementing slurry composition for creating the cement stone with the corresponding values of compression strength and gas permeability in the bottomhole formation zone has been developed, which includes oilwell cement, expanded perlite, non-ionic surfactant, plasticizer and water. Dependences of the cement stone compression strength and the stone permeability coefficient on the proportion of expanded perlite in the cementing slurry solution have been revealed. It is recommended to use the proposed cementing slurry for creating a cement stone with specified values of compression strength and permeability in the expanded well shaft in the interval of the producing reservoir. Originality. The optimal proportion of the expanded perlite in the solution has been found, at which the corresponding values of the compression strength (up to 4 MPa) and gas permeability (up to 3.47 μm2) of the cement stone is provided. Practical implications. When using the developed composition, it is possible to increase the yield of wells with unstable reservoirs and improve their working conditions by preventing the sand entry from the reservoir into the well.

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Effect on the Compressive Strength of Mortars Using Ground Granulated Blast Furnace Slag as a Partial Replacement of Cement

Cited by 7 publications

References 25 publications

The Influence of GGBFS as an Additive Replacement on the Kinetics of Cement Hydration and the Mechanical Properties of Cement Mortars

The Influence of GGBFS as an Additive Replacement on the Kinetics of Cement Hydration and the Mechanical Properties of Cement Mortars

Utilization of Blast Furnace Slag as an Enhancer in Masonry Mortars Made with Thermally Treated Waste Concrete Powder

Development of composition of cementing slurry for fastening of low-cemented rocks

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