Thermo-mechanical performance of concrete with alternative binder material

Kirton, Paula; Richardson, Alan; Agnew, Brian

doi:10.1108/ss-01-2013-0002

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…The specific surface area (SSA) of PA‐MXene/CNT‐50 is 94 m 2 g −1 calculated by the Brunauer–Emmett–Teller (BET) method, which is slightly higher than that of RA‐MXene/CNT‐50 (81 m 2 g −1 ). PA‐MXene/CNT‐50 aerogel has a large pore volume ( V g ) of 16 cm 3 g −1 measured by the water displacement method, [ 33 ] that provides space for a high sulfur loading. The LiPS adsorption abilities of different samples were tested using the static adsorption method (Figure 1g).…”

Section: Resultsmentioning

confidence: 99%

Lamellar MXene Composite Aerogels with Sandwiched Carbon Nanotubes Enable Stable Lithium–Sulfur Batteries with a High Sulfur Loading

Zhang

Luo

Zhou

et al. 2021

Adv Funct Materials

121

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Realizing long cycling stability under a high sulfur loading is an essential requirement for the practical use of lithium–sulfur (Li–S) batteries. Here, a lamellar aerogel composed of Ti3C2Tx MXene/carbon nanotube (CNT) sandwiches is prepared by unidirectional freeze‐drying to boost the cycling stability of high sulfur loading batteries. The produced materials are denoted parallel‐aligned MXene/CNT (PA‐MXene/CNT) due to the unique parallel‐aligned structure. The lamellae of MXene/CNT/MXene sandwich form multiple physical barriers, coupled with chemical trapping and catalytic activity of MXenes, effectively suppressing lithium polysulfide (LiPS) shuttling under high sulfur loading, and more importantly, substantially improving the LiPS confinement ability of 3D hosts free of micro‐ and mesopores. The assembled Li–S battery delivers a high capacity of 712 mAh g−1 with a sulfur loading of 7 mg cm−2, and a superior cycling stability with 0.025% capacity decay per cycle over 800 cycles at 0.5 C. Even with sulfur loading of 10 mg cm−2, a high areal capacity of above 6 mAh cm−2 is obtained after 300 cycles. This work presents a typical example for the rational design of a high sulfur loading host, which is critical for the practical use of Li–S batteries

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Section: Resultsmentioning

confidence: 99%

Lamellar MXene Composite Aerogels with Sandwiched Carbon Nanotubes Enable Stable Lithium–Sulfur Batteries with a High Sulfur Loading

Zhang

Luo

Zhou

et al. 2021

Adv Funct Materials

121

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“…In addition to the selected thermal insulation aggregates in concrete, many studies focused on the thermal behavior of concrete with various other factors, including age, size and type of concrete, volume fraction and moisture status of aggregate, the amount of cement, temperature and admixtures type (Hong et al , 2020; Kim et al , 2012; Kirton et al , 2013; Nguyen et al , 2014). The studies evidenced the influence of aggregate moisture content and its type on mortar’s and concrete’s TC.…”

Section: Introductionmentioning

confidence: 99%

Thermal analysis of concrete slabs with insulating materials using ANSYS

Kumar²

2022

WJE

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Purpose This study aims to assess the efficacy of thermal analysis of concrete slabs by including different insulation materials using ANSYS. Regression equations were proposed to predict the thermal conductivity using concrete density. As these simulation and regression analyses are essential tools in designing the thermal insulation concretes with various densities, they sequentially reduce the associated time, effort and cost. Design/methodology/approach Two grades of concretes were taken for thermal analysis. They were designed by replacing the natural fine aggregates with thermal insulation aggregates: expanded polystyrene, exfoliated vermiculite and light expanded clay. Density, temperature difference, specific heat capacity, thermal conductivity and time were measured by conducting experiments. This data was used to simulate concrete slabs in ANSYS. Regression analysis was performed to obtain the relation between density and thermal conductivity. Finally, the quality of the predicted regression equations was assessed using root mean square error (RMSE), mean absolute error (MAE), integral absolute error (IAE) and normal efficiency (NE). Findings ANSYS analysis on concrete slabs accurately estimates the thermal behavior of concrete, with lesser error value ranges between 0.19 and 7.92%. Further, the developed regression equations proved accurate with lower values of RMSE (0.013 to 0.089), MAE (0.009 to 0.088); IAE (0.216 to 5.828%) and higher values of NE (94.16 to 99.97%). Originality/value The thermal analysis accurately simulates the experimental transfer of heat across the concrete slab. Obtained regression equations proved helpful while designing the thermal insulation concrete.

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“…The benefits of using GGBS in concrete as a cement replacement are many and range from freeze/thaw resistance [1], to the control of internal building temperatures [2,3].…”

Section: Introductionmentioning

confidence: 99%

Determination of Initial and Final Set of Ternary Mortars and Compressive Strength with Regard to Temperature Variation

Richardson¹,

Dawson

Pesce

2019

J. Civ. Eng. Constr.

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The research examined herein classifies initial and final set times, for samples of ternary mortars composed of CEM 1 (52.5) and Ground Granulated Blast Furnace Slag (GGBS). The samples tested comprised of different CEM 1 and GGBS proportions. The mixes used, ranged from 100% CEM1 where this component was replaced at 10% increments by mass terminating at a 20% CEM1 content. With a reduction in cement content, the balance of the total required binder was being made up with GGBS. The ternary mortar cubes were tested for initial and final set times at average ambient room temperature (19.7 – 22.2 °C) and temperatures of 5 and 40 degrees Celsius. The findings highlighted the additional time required for initial and final set times at reduced temperatures and it also highlighted the further additional time for initial and final set times when GGBS is used as a cement replacement in progressively increasing quantities. Initial and final set times at 40 degrees Celsius were faster than ambient and 5 degrees Celsius, however the difference between initial and final set times was much reduced at 40 degrees Celsius. Both temperature and cement replacement affected the compressive strength at a curing period of 28 days, however GGBS is known to take longer than CEM1 to achieve a given strength development of say 90% of the final or ultimate strength. The two factors of temperature and cement replacement have a significant impact on setting times.

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Thermo-mechanical performance of concrete with alternative binder material

Cited by 5 publications

References 17 publications

Lamellar MXene Composite Aerogels with Sandwiched Carbon Nanotubes Enable Stable Lithium–Sulfur Batteries with a High Sulfur Loading

Lamellar MXene Composite Aerogels with Sandwiched Carbon Nanotubes Enable Stable Lithium–Sulfur Batteries with a High Sulfur Loading

Thermal analysis of concrete slabs with insulating materials using ANSYS

Determination of Initial and Final Set of Ternary Mortars and Compressive Strength with Regard to Temperature Variation

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