Results 31 to 40 of about 92,558 (119)

Characterization and Reactivity of Natural Pozzolans from Guatemala

open access: yesApplied Sciences, 2022
The possibility of using pozzolanic materials as a partial substitute for Portland cement (PC) to develop mortars and concretes promotes environmental and economic benefits.
Oscar M. Sierra   +5 more
doaj   +1 more source

Cancelable ECG Biometrics Using Compressive Sensing-Generalized Likelihood Ratio Test

open access: yesIEEE Access, 2019
Electrocardiogram (ECG) has been investigated as promising biometrics, but it cannot be canceled and re-used once compromised just like other biometrics.
Hanvit Kim, Se Young Chun
doaj   +1 more source

Compressive Strength Forecasting of Air-Entrained Rubberized Concrete during the Hardening Process Utilizing Elastic Wave Method

open access: yesCrystals, 2020
Conventional compressive strength test of concrete involves the destruction of concrete samples or existing structures. Thus, the focus of this research is to ascertain a more effective method to assess the compressive strength of concrete, especially ...
Zhi Heng Lim   +5 more
doaj   +1 more source

Analysis of Influencing Factors and Mechanism of Strength of Cement-Modified Silty Sand

open access: yesGeofluids, 2021
The unconfined compressive strength of cement-modified silty sand in Jilin Province was investigated in this study. For this purpose, various tests were conducted, including the screening test, compaction test, CBR test, X-ray fluorescence detection, and
Weidong Jin   +3 more
doaj   +1 more source

Study on cracking resistance of polyvinyl alcohol fiber-reinforced low-dose cement-stabilized crushed stone [PDF]

open access: yesArchives of Civil Engineering
In this paper, the effects of polyvinyl alcohol fiber incorporation on the crack resistance of low-dose cement-stabilized crushed stone have been investigated.
Xin Yan, Zhigang Zhou, Jian Jin
doaj   +1 more source

Machine learning based strength prediction method for cement-based grouting material [PDF]

open access: yesJournal of Hebei University of Science and Technology
In order to accurately predict the compressive strength of cement-based grouting material by small diameter core sample method, the compressive strength tests of cement-based grouting material standard size test blocks and small diameter core samples ...
Qilian LI   +4 more
doaj   +1 more source

Compressive creep test rig for thermoplastic samples

open access: yesHardwareX
Creep occurs when a material is subjected to a constant load resulting in deformation. Thermoplastics are prone to creep and understanding creep behavior is important for predicting the long-term performance of thermoplastic parts that must bear load ...
Seyyed Saeed Vaezzadeh   +4 more
doaj   +1 more source

Evaluate Brick Units by Ultrasonic Waves

open access: yesTikrit Journal of Engineering Sciences, 2005
Wide laboratory search was done to evaluate brick units in single, and test the prisms built from brick unit by use ultrasonic waves in non-destructive test. The results show that the pulse velocity increases with increasing compressive strength and time
Zain Al-Abdin Raouf   +2 more
doaj   +3 more sources

Axial compressive strength testing of single carbon fibres

open access: yesArchives of Mechanics, 2013
In this study the tensile recoil test – an experimental technique to find the axial compressive strength of single fibres is discussed and the axial compressive strength of single carbon fibres has been determined for a fixed gauge length. Several fibres
I.P. Kumar, P.M. Mohite, S. Kamle
doaj   +1 more source

Probe penetration test applied for evaluating shotcrete compressive strength

open access: yesRevista IBRACON de Estruturas e Materiais
This study presents a methodology for evaluating shotcrete compressive strength. Because of the high surface roughness and low thickness of the concrete layer observed in shotcrete structures, the proposed methodology is based on the probe penetration ...
W. R. L. da Silva   +2 more
doaj   +1 more source

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