Results 81 to 90 of about 92,964 (262)

Determination of the Dynamic Modulus of Elasticity of Concrete with Expanded Clay Using Ultrasonic Testing [PDF]

Materials Research
The use of lightweight concrete with expanded clay has increased as an alternative for reducing the self-weight of structures. Consequently, techniques that facilitate the analysis of the mechanical and elastic properties, such as ultrasonic pulse ...
Camila Rodrigues Moura, Gisleiva Cristina dos Santos Ferreira, Henrique Tobace Trezza, Everton de Freitas Cordova de Souza, Marcela de Souza Barros Sollero, Thiago Drozdowski Priosta, Armando Lopes Moreno Júnior   +6 more
doaj   +1 more source

Prestress loss of post-tensioned clay diaphragm and fin brickwork [PDF]

, 1994
Unlike calcium silicate and concrete block masonry which undergo shrinkage with time, clay brickwork has been known to expand instead. Expansion of brick units in prestressed masonry will cause an increase in the prestressing force instead of prestress ...
Tapsir, Siti Hamisab
core  

Wonder as a Gateway to Science Meaning‐Making: Primary Pupils’ Narrative Journeys

Future in Educational Research, EarlyView.
ABSTRACT This study explores how wonder fosters transformative learning in science education for pupils (11–12 years old), creating meaning about cycles in nature. As an emotional and epistemic trigger, wonder may bridge everyday experiences with abstract scientific concepts by stimulating curiosity and creativity. Through a narrative writing task, the
Pauline Book, Siri‐Christine Seehuus
wiley   +1 more source

Management of the Properties of Shipbuilding Expanded Clay Lightweight Concrete

International Journal of Engineering & Technology, 2018
The purpose of the research was to improve the strength and durability of shipbuilding expanded clay lightweight concrete by using modifiers, fibers and optimizing the composition of concrete. The four-factor experiment was carried out according to the optimal plan. The experiment varied, the amount of sulfate-resistant Portland cement, silica fume and
Sergii Kroviakov, Andrii Mishutin, O V. Pishev   +2 more
openaire   +1 more source

Analytical Modeling of Heat Transfer and Deformation Around a Circular Cavity in Elastic Ground

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT The subsurface is increasingly exploited to host energy, utilities, and infrastructure systems that interact with surrounding soils and rocks through their thermal and functional operation. Prominent examples are provided by energy geostructures, district heating networks, buried power cables, steam and water pipes, and underground nuclear ...
Arianna Lupattelli, Diana Salciarini, Alessandro F. Rotta Loria   +2 more
wiley   +1 more source

Implications of heterogeneous embankment conditions for geoelectrical investigations on dams: A case study at Mactaquac Dam, Canada

Near Surface Geophysics, EarlyView.
Abstract Electrical resistivity tomography (ERT) has been shown to be effective for surveying and monitoring dams, due to the method's sensitivity to moisture content and relevant physical properties (e.g., porosity). Automated ERT systems, capable of time‐lapse monitoring, can be used to detect variations in ground conditions.
John S. Ball, Karl E. Butler, Jonathan E. Chambers, Paul B. Wilkinson, Andrew Binley   +4 more
wiley   +1 more source

EFFECT OF WATER-CEMENT RATIO ON RHEOLOGICAL PROPERTIES OF FOAM CONCRETE MADE OF LOCAL RAW MATERIALS

Вестник Дагестанского государственного технического университета: Технические науки, 2018
. Objectives  The purpose of this work is to study the dependency of the fluidity of foam concrete mixtures on the water-cement ratio when using various local aggregates and wastes from the Republic of Dagestan and comparing the fluidity characteristics ...
Kamil A. Otsokov
doaj   +1 more source

Some observations on statnamic pile testing [PDF]

, 2006
Limited guidance on usage and methodology is currently available to engineers for the most common rapid load pile test, known as Statnamic. In order to improve the analysis of Statnamic testing in clay soils a full-scale instrumented auger bored pile was
A. F. L. Hyde, Das B. M., Dunnicliff J., Institution of Civil Engineers, Janes M. C., Japanese Geotechnical Society, Kusakabe O., M. J. Brown, Mcvay M. C., Middendorp P., Weltman A. J.   +10 more
core   +2 more sources

How can children and young people have a voice in urban treescapes?

People and Nature, EarlyView.
Abstract Scientific understanding of climate change has, to date, failed to result in sufficient action. This paper proposes that a deficit model of top‐down learning and dissemination in relation to public engagement with science may be part of the problem, particularly when considering the attitudes, values and empowerment of children and young ...
Simon Carr, Abi Hackett, Kate Pahl, Samyia Ambreen, Khawla Badwan, Elizabeth Curtis, Susannah Gill, Ambika Kapoor, Peter Lawrence, Johan Siebers, Jan White   +10 more
wiley   +1 more source

Fiber Reinforced Self-Compacting Lightweight Concrete for the Manufacture of Floating Structures

Zanco Journal of Pure and Applied Sciences, 2019
In this study fiber reinforced self-compacting lightweight concrete prepared using polypropylene fiber, limestone dust, and lightweight expanded clay aggregate LECA.
Danar Altalabani, Stefan Linsel, Dillshad. K.H. Bzeni   +2 more
doaj   +1 more source