Results 91 to 100 of about 6,439,693 (277)

Non-linear behaviour under compression of hardened 3D-printed concrete [PDF]

3D-printed concrete (3DPC) is becoming increasingly popular due to its ability to offer rapid construction, flexibility in design, reduced labour and material costs, and eco-friendliness as it uses waste materials like plastics and resins.
Menon, Arun, Bharti, Mrityunjay, Santhanam, Manu   +2 more
core   +1 more source

Thresholds: The metaphorical foundations of powerful knowledge

The Curriculum Journal, EarlyView.
Abstract This paper advances a theoretical account of threshold concepts as metaphorical‐relational structures that reorganise meaning across contexts. Building on conceptual metaphor theory, we propose that threshold concepts can be understood as sites of schema‐level reorganisation: deep, embodied patterns of relational logic that scaffold abstract ...
Maria Karrol, Elizaveta Lyssova‐Golomzina   +1 more
wiley   +1 more source

Concrete Pavement Mixture Design and Analysis (MDA): Assessment of Air Void System Requirements for Durable Concrete, TPF-5(205), 2012 [PDF]

, 2012
Concrete will suffer frost damage when saturated and subjected to freezing temperatures. Frost-durable concrete can be produced if a specialized surfactant, also known as an air-entraining admixture (AEA), is added during mixing to stabilize microscopic ...

core  

Freeze/thaw protection of concrete with optimum rubber crumb content [PDF]

, 2012
This research looks at utilising an optimum quantity of rubber crumb as an air entraining ad-mixture in concrete, thus providing maximum freeze-thaw protection and maximum strength.
Kathryn A. Coventry, Richardson, Alan, Coventry, Kathryn, Alan E. Richardson, Gavin Ward, Ward, Gavin   +5 more
core   +1 more source

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source

Analytical stress solution framework for lined compressed air energy storage chambers and its application to safe burial depth determination and supporting effectiveness evaluation

Deep Underground Science and Engineering, EarlyView.
An analytical framework delivers a closed‐form stress solution for lined compressed air energy storage chambers, enabling the determination of the minimum safe burial depth. The solution quantitatively evaluates lining support effectiveness, offering a reliable tool for chamber design and optimization.
Zeyuan Sun, Cheng Zhao, Jinquan Xing, Qinyuan Luo   +3 more
wiley   +1 more source

Evaluation of Hardened Properties of Ferro Geopolymer Concrete

Journal of Physics: Conference Series
Abstract Increase in growth of construction industry is eventually leading to a rise in output of Portland cement which in turn increases the pollution. This has effect on global warming. As to reduce the effect of green-house gases, sustainable materials are being used in concrete intensively. One among which is the Geo-polymer concrete
K Sai Kishore, G Lalitha
openaire   +1 more source

Seismic analysis and design of tunnels within fault ground: A review

Deep Underground Science and Engineering, EarlyView.
The research methods of seismic response of tunnels within fault ground, including field investigations, analytical solutions, physical experiments, and numerical simulations, and seismic countermeasures are discussed. The present study examines the shortcomings and limitations of the current research and design, and puts forward proposals for future ...
Xingda Wang, Yujing Jiang, Xuepeng Zhang, Yuyong Jiao, Ningbo Li, Xiao Wang, Bo Li   +6 more
wiley   +1 more source

Preparation and Characterization of Ultra-Lightweight Foamed Concrete Incorporating Lightweight Aggregates

Applied Sciences, 2019
Increasing interest is nowadays being paid to improving the thermal insulation of buildings in order to save energy and reduce ecological problems.
Mohamed Abd Elrahman, Mohamed E. El Madawy, Sang-Yeop Chung, Pawel Sikora, Dietmar Stephan   +4 more
doaj   +1 more source

Influence of Mineral Admixtures on the Mechanical Properties of Fresh and Hardened Concrete

Construction Science, 2016
This research aims to investigate the effect of\ud introducing different mineral admixtures on the mechanical\ud properties of concrete. The research is focused on optimizing the properties of fresh and hardened concrete, looking in particular at how factors such as slump, unit weight, air entrancement, compressive strength, tensile strength, flexural ...
Elshafie, S, Boulbibane, M, Whittleston, GS   +2 more
openaire   +1 more source