Results 21 to 30 of about 62,294 (285)

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

A proposed methodology for the global study of the mechanical properties of cold asphalt mixtures [PDF]

open access: yes, 2014
[Abstract:] Despite having been used for decades, the structural performance of emulsion-treated materials has still not been investigated as intensely as in the case of hot-mix asphalt (HMA).
Gómez Meijide, Breixo   +1 more
core   +1 more source

Models to estimate Brazilian indirect tensile strength of limestone in saturated state

open access: yesRudarsko-geološko-naftni zbornik, 2016
There are a number of methods for estimating physical and mechanical characteristics. Principally, the most widely used method is regression, but recently, more sophisticated methods such as neural networks have frequently been applied as well. This paper presents the models of a simple and a multiple regression and neural networks –types Radial Basis ...
Briševac, Zlatko, Kujundžić, Trpimir
openaire   +4 more sources

Pembinaan konstruk instrumen penilaian pasca penghunian untuk perumahan bertingkat yang dibina menggunakan kaedah Sistem Binaan Berindustri (IBS) [PDF]

open access: yes, 2021
Post Occupancy Evaluation (POE) is an activity of the building evaluation process with a focus on quality, operational performance and satisfaction of the occupants. The POE is important to evaluate completed and occupied buildings to identify weaknesses
A. Rahman, M. A.   +3 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

The effect of different deicing solutions on the moisture susceptibility of asphalt mixture

open access: yesSN Applied Sciences, 2021
The present research studies the effectiveness and efficiency of solutions such as sodium chloride, magnesium chloride and potassium acetate on asphalt pavement to reduce the damage caused by moisture on asphalt pavement in winter.
Ali Abdi Kordani   +3 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

Water saturation induced changer in the indirect (Brazilian) tensile strength and the failure mode of some igneous rock materials [PDF]

open access: yes, 2020
The present study concentrates on water induced strength reduction and variation of the failure mode in indirect (Brazilian) tension tests of several igneous rock materials under three moisture cases of oven-dry, air-dry and fully saturated states.
Komurlu, Eren, Yasar, Serdar
core  

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