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Online since: January 2025
Authors: Hanizam Awang, Muhammad Nura Isa
Both fresh and hardened properties tests were conducted to assess the WA lye-activated geopolymer mortar at 3, 7, 14, and 28 days.
Both the rheological and hardened properties of the geopolymer mortar were influenced by the AAR.
Al Bakri, “Properties of fresh palm oil fuel ash based geopolymer material,” Advanced Environmental Biolology, vol. 7, no.
Farzadnia, “Characterization of mechanical and microstructural properties of palm oil fuel ash geopolymer cement paste,” Construction and Building Materials, vol. 65, pp. 592–603, 2014, doi: 10.1016/j.conbuildmat.2014.05.031
Hardjito, “Factors Affecting the Setting Time of Fly Ash-Based Geopolymer,” Materials Science Forum, vol. 841, pp. 90–97, 2016, doi: 10.4028/ www.scientific.net/MSF.841.90
Online since: June 2013
Authors: Joao Pedro M. Correia, Saïd Ahzi
However, various process parameters affect the performance of the electromagnetic forming system.
Mechanical model.
Hence, in agreement with the work of Golovashchenko [1], the initial gap distance is mainly defined by the initial voltage and by the insulation properties.
The initial charging voltage V0 and the coil geometry affect the circuit parameters and then the discharged current (via the angular frequency and the damping factor).
But the angular frequency and the damping factor are also dependent on the circuit capacitance which is quite equal to the capacitance of the capacitor bank.
Online since: September 2008
Authors: Shi Yan, Wei Sun
Introduction Concrete structures might be damaged in various types and degrees during their service lives due to some influencing factors such as aging of material, excessive use, overloading, environmental condition and deficient maintenance.
The lead zirconate - titanate (PZT) is a kind of typical piezoelectric ceramic material with these dual properties.
The physical parameters of both materials are shown in Table 1 and the mechanical and electrical properties of the PZT patches are shown in Table 2.
There are two kinds of factors influenced the range.
The one includes external factors such as voltage and frequency of the PZT excitation, and the other contains material properties and dimensions of the body structure etc.
Online since: December 2011
Authors: Gao Chun Li, Yu Feng Wang, Ai Min Jiang, Xiang Yi Liu
These constitutive models help us in realizing the mechanical behavior of propellant.
Their mechanical behavior depends on a number of factors, which including binder, particles, interfacial strength, the loading mode and the spatial particle distribution.
Thus, a micromechanical analysis is needed to understand the influence of these factors in the mechanical behavior of propellant.
Constitutive models To capture the mechanical behavior of the propellant, it is crucial to have accurate experimental data of its constituent properties.
Cohesive interface properties adopted in this study are ,, .
Online since: May 2011
Authors: Anuchit Uchaipichat, Ekachai Man Koksung
The index properties of test soil are given in Table 1.
Table 1 Index Properties of Sample Property Values Cohesion () 0 kPa Internal angle of friction () 33.1o Maximum dry unit weight () 16.6 kN/m3 Optimum moisture content () 7.0% Loading frame Dial gauge Specimen Compaction mold with diameter of 4 inches Proving ring Circular rod Fig. 1 Experimental equipment for laboratory bearing tests.
Comparisons between Test Results and Simulations For the bearing capacity of a circular foundation, the shape factors are required in the bearing capacity equation for the strip foundation.
The values of shape factors have been proposed by several investigators [1-3].
The scaling factor is typically applied through the factor .
Online since: March 2022
Authors: Hai Feng Liu, Shu Ing Doh, Ren Guang Tao, Qian Zhang, He Jiao Ma
Jin [15] and Fu [16] investigated the effect of fly ash dosage and DSRR on the mechanical properties of DSC.
In addition to the static mechanical properties of desert sand concrete, the dynamic mechanical properties of desert sand concrete have also been investigated.
Liu [20] and Zhang [21] tested the dynamic mechanical properties of DSC by varying the strain rate.
Thus, extreme differences are able to be used rank factors in order of impact from highest to lowest among many factors.
The mechanical properties of concrete with the DSRR of 30% are higher than those with the DSRR of 10% [19-21].
Online since: March 2017
Authors: Miao Liu, Qiang Long, Peng Zhai, Chun Yang Wang, Bo Han Xiao
Research fields: mechanical and electrical equipment.
As the calculation results, a bubble stimulated by high-low-frequency vibration can float up faster with violent vibration. 1 Introduction Casting Al-Si alloy is widely utilized in a number of fields such as automation, construction and aviation due to the favourable casting properties, mechanical properties and low density.
It appears that applied power is the most important factor in hydrogen removal.
Movement of cavitation bubble is the dominating factor which affects degassing efficiency.
Prokic, A New Approach to Ultrasonic Degassing to Improve the Mechanical Properties of Aluminium Alloys, J.
Online since: March 2008
Authors: Xue Ren Wu, Hui Ji Shi, Hui Chen Yu, Bin Zhong
Whereas from the onset of the development and use of such coating, there have been much concern about possible detrimental effects of the coating and coating process on the mechanical properties and fatigue behaviors of coating/substrate system.
The differences in chemical composition between the coating and the substrate material lead to an inevitable mismatch in their physical and mechanical properties [4].
The results indicate that the presence of protective coating does affect the fatigue life of the alloy according to strain range level and temperature.
The DBTT is affected by several factors, including coating composition, coating application process, coating thickness, surface finish and strain rate [2, 3, 6, 7].
Mughrabi, in: Thermo-mechanical fatigue behavior of materials, ASTM STP 1371, edited by H.
Online since: September 2014
Authors: Hua Tian, Zi Xian Zhang
The fresh-old concrete bonding interface is the key to designing assembled monolithic water-distributing beam of mechanical draft cooling tower.
Affected by the combined impact of shear force and moment, main rebar is under a state of complex stress, the principal stress of which can be calculated by the forth strength theory.
Introduction Mechanical draft cooling tower is the main structure of circulating cooling system in thermal power plant.
Force analysis of interface between fresh-old concrete Chinese scholars have conducted a lot of experimental study and theoretical analysis about the bonding properties and force mechanisms of the interface of fresh-old concrete, the main conclusions are [1~4]: 1) compared to monolithic pouring, the bonding strength of fresh-old concrete interface reduced to some extent, 2) on the interface, the shear transfer was achieved by fresh-old concrete bonding, dowel action, aggregate interlock and restraint stiffness of reinforcement.
The working environment determines the interface should be controlled under uncracked state. 2, because of the combined action of shear and bending moment, the reinforcing steel crossing interface is a complex stress state. 3, the anchorage is the prerequisite that ensures the function of reinforcing steel, so the reinforcing steel shall be prevented from anchoring failure. 4, when resistance of fresh-old concrete interface can be guaranteed, in order to ensure the durability, the surface of water-distributing beam should be coated waterproof paint. 5, there are many influence factors influencing strength of fresh-old concrete interface, and the experimental study on this project especially the influence of seepage is rare, further study is requested in the future.
Online since: June 2020
Authors: Hoc Thang Nguyen, Thi Hong Thuy Le, Van Khoi Nguyen, Thi Luong Nguyen, Thanh Tung Nguyen, Thi Thu Ha Pham
The physical and chemical properties of natural polymers significantly affect the performance of the final coating [3].
In addition, plasticizers are used to reduce brittleness and to improve mechanical properties of the membrane.
Besides, emulsifiers with small spheres increase their dispersion and improve physico-mechanical properties of the membrane [4-5].
Physico-Mechanical Properties.
Physico-mechanical properties of mono- and composite films.
Showing 13131 to 13140 of 26166 items