Results 21 to 30 of about 2,451,919 (277)

Assessing degradation of composite resin cements during artificial aging by Martens hardness

open access: yesHead & Face Medicine, 2017
Background Aim of the study was to verify the efficiency of Martens hardness measurements in detecting the degradation of composite resin cements during artificial aging.
Stefan Bürgin, Nadja Rohr, Jens Fischer
doaj   +1 more source

Dynamic tensile behaviour and crack propagation of coal under coupled static-dynamic loading

open access: yesInternational Journal of Mining Science and Technology, 2020
The fracture behaviour and crack propagation features of coal under coupled static-dynamic loading conditions are important when evaluating the dynamic failure of coal.
Xianjie Hao   +6 more
doaj   +1 more source

Durability and strength characteristics of high-strength concrete incorporated with volcanic pumice powder and polypropylene fibers

open access: yesJournal of Materials Research and Technology, 2020
In this paper, the partial replacement of volcanic pumice powder (VPP) was investigated for use as a supplementary cementitious material. High-strength concrete (HSC) was prepared using two sets of VPP (10% and 20%) incorporated with three sets of ...
Abdullah M. Zeyad   +2 more
doaj   +1 more source

Loading-Rate Dependency of Uniaxial and Indirect Tensile Strength.

open access: yesShigen-to-Sozai, 1993
Uniaxial and indirect tensile strength of Sanjome andesite was obtained under air-dried and water-saturated conditions. It was found that the strength increases with loading rate in both conditions.The difference in loading-rate dependency can not be observed between uniaxial and indirect tensile tests. And also the amount of strength increase with ten
OKUBO, Seisuke   +2 more
openaire   +1 more source

Damage tolerance of impacted curved panels [PDF]

open access: yes, 2008
The final aim of this study is to evaluate the influence of impact damage on the residual strength of carbon/epoxy vessels stressed by internal pressure.
Lataillade, J.-L.   +9 more
core   +1 more source

Economical Reactive Powder Concrete Cast Using Available Materials in North Sinai, Egypt

open access: yesArchives of Civil Engineering, 2013
In this research reactive powder concrete (RPC) was prepared using sand from North Sinai. The mechanical properties of locally cast RPC were investigated and evaluated by studying the effects of using different cement and silica fume contents and new ...
Meleka Nageh N.   +2 more
doaj   +1 more source

A new approach for understanding the mechanism of wellbore strengthening theory

open access: yesJournal of King Saud University: Engineering Sciences, 2022
To achieve fast, safe and economical drilling operations through formations containing natural fractures or vugs, all fractures and vugs must be perfectly sealed using proper fractures seal materials in a process called wellbore strengthening.
Musaed N.J. AlAwad
doaj   +1 more source

The influence of recycled asphalt pavement on 20mm binder course mix performance [PDF]

open access: yes, 2006
Paper presented at the 3rd National Symposium on Bridge and Infrastructure Research in Ireland, Dublin, 2006 and at ICAP (International Conference on Asphalt Pavements) conference Quebec, Canada, 2006This paper presents the results of ongoing research on
Gibney, Amanda   +3 more
core   +1 more source

The Experimental Assessment Of The Effect Of Paper Waste Ash And Silica Fume On Improvement Of Concrete Behavior [PDF]

open access: yesمهندسی عمران شریف, 2021
The idea of using paper wastes in concrete to reduce environmental pollution and Silica fume to improve the properties of concrete is a huge transformation in the building industry.
J. Pourazar   +4 more
doaj   +1 more source

Tensile Strength Modeling of Limestone Rocks in Sulaymaniyah City, Iraq Using Simple Tests

open access: yesPolytechnic Journal, 2019
Tensile strength of rocks is one of the mechanical properties of intact rock that is a significant parameter for designing geotechnical structures includes dam foundations and tunnels.
Diyari Abdulrahman Mohammed   +1 more
doaj   +1 more source

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