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Influence of MPC salt on properties of mortar under sulfate environment was investigated.
Sulfate attack is one of the common factors that induce the deterioration of concrete, which has been discussed a lot during past decades [1].
For normal C3A content, sulfate attack often requires a long duration, and Ca2+ concentration is the main factor affecting ettringite formation as well as stability.
Tkaczewska, Effect of the superplasticizer type on the properties of the fly ash blended cement, Constr.
Pei, Effects of polycarboxylic acid basedsuperplasticiser on properties ofsulphoaluminate cement, Mater.

Mechanical activation of fly ash by high energy planetary ball mill and the effects on physical and morphology properties.
Results and Discussion Mechanical milling involves mechanical forces such as compressive force, shear or impact to affect particle size reduction of bulk materials.
The size of the powder particle depends on several factors such as milling speed, type of milling equipment, size of balls used and ball to powder weight ratio (BPR).
Mechanical activation able to enhance the properties of fly ash and allows it to be utilized in wider application.
Rani, Modification in properties of fly ash through mechanical and chemical activation, Am.

This paper presents a new mechanism affecting the stability of machining process called mass induced damping.
This effect will open a new understanding how certain mechanical factors would affect the value of damping of a system.
This is to ensure the data of the natural frequencies gathered from LMS Structure Acquisition are the true natural frequency of the thin wall plate, not other frequency such as noise or other environmental factors.
Also damping is a complicated natural occurrence especially in vibration and this study perhaps has identified one out of many factors that can cause changes in the value damping and how it affects machining process.
Moreover, with thin and delicate work piece geometry any minor changes during the cutting process should be taken into consideration taking into account varying dynamic properties which should be undertaking in future study.

Because of the differences in physical properties, the aeronautic PMMA for porthole may easily craze, crack and even explode in flight.
In this paper, the operating conditions for porthole were analyzed and testing methods of PMMA’s thermo-physical properties were studied considering the two main factors, temperature and pressure, which affects porthole’s operating life.
However, airplane is inevitably affected by various severe environmental factors in flight, in which crack and even explosion may appear for the aeronautic PMMA.
In China, Guo Weiguo[3] studied the deformation and failure behavior of MDYB-3 oriented PMMA glass under different loading conditions, and pointed out MD-3’s thermodynamic properties were strongly affected by strain rate and temperature.
Aeronautic PMMA possesses excellent optic, intensity, heat-resisting, age-resisting and UV-resisting properties.

Factors Affecting the Metal Recovery Yield During Induction Melting of Aluminium Swarf Hélder Puga1a, Joaquim Barbosa1,b and Carlos Silva Ribeiro2,c 1CT2M – Centre for Mechanical and Materials Technologies, Universidade do Minho, 4800-058 Guimarães, Portugal 2FEUP, Departamento de Engenharia Metalúrgica e de Materiais, 4200-465 Porto, Portugal apuga@dem.uminho.pt, bkim@dem.uminho.pt, csribeiro@fe.up.pt Keywords: Aluminium swarf; Recycling; Melting; Environment Abstract.
Swarf moisture reduction, induction melting under protective atmosphere and a specially developed degassing technique were found the most important factors influencing the recycling process.
Nevertheless, yields obtained for 300 and, particularly, 500 bar, were also very high, revealing that melt protection and ultrasonic processing are perhaps the most crucial factors in the recovery process.
Conclusions · An efficient and environmentally friend swarf recycling technique was developed and its is ready for widespread dissemination; · The combined effect of induction melting, argon protective atmosphere and ultrasonic vibration of the melt during the entire processing are the crucial factors of the process, and can lead to 95% Al recovery yield; · Besides those factors, the briquetting pressure is also a major factor of the process.
Chino et al., Mechanical properties of Mg-Al-Ca alloy recycled by solid-state recycling.

The influence of sintering pressure on density and mechanical properties of the composites were studied.
The influence of pressure on density and mechanical properties of BN-Si3N4 composite ceramics were studied.
Considering such factors as security and energy consumption, 40MPa is optimal for the SPS sintering process.
Influence of hBN content on mechanical and tribological properties of Si3N4/BN ceramic composites, J.
Effect of porosity on mechanical and dielectric properties of 20% BN/Si3N4 composite porous ceramics.

Recently, the accidents of underground pipelines occur frequently, such as gas leakage, road collapse, which seriously affect the live and property safety of the people, and the social order of the city.
Therefore, in-depth study and understanding the surrounding environment factors affecting underground pipelines is help for the exploration of the relationship between environmental factors and underground pipeline, and reduction of the appearance of pipeline accidents.
According to the calculation, the number of minimum cut sets is 38, so the factors which affect the top event are many.
Mechanism analysis of environmental factors impact on underground pipelines Underground pipeline accidents are not only affected by the external environment, but also affected by its own safety and management factors, and these factors affect each other.
Factors analysis of parallel underground pipelines displacements affected by pipe jacking.

The effect of single pulse, double pulse and forceArc MIG welding technology on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body Lei Su 1,a, Yuan Nie1,b , Hua Ji1,c , Chuanping Ma1,d , Shaohua Yan1,e , Lijun Wang1,f , Hui Chen1,g , Lichun Meng2,h. 1.
Therefore，the demand for welding quality of aluminum alloy train body is very high，and the mechanical properties of joints severely affected the overall strength of welded components.
To solve this problem ,we use the 421 EXPERT forceArc MIG of PHOENIX series of German EWM company to perform three types of experiments of single pulse, double pulse, and forceArc welding ,and then effect of three welding methods on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body is compared.
In this paper, mechanical properties, micro shear properties and weld ability of the joints welded by Force Arc are researched.
The sample is mechanical cleaning.

Improvement of the Adhesive Wear Resistance and Mechanical Properties of Low-Carbon Steel by Solid Carbonization M.
In order to obtain a variable thickness of the carbonated layer, a carbonization process was performed at different temperatures and  times to demonstrate the effect of these two important factors to the amount of diffused carbon to the surface of the solid and thus the extent of its influence to obtain the required properties of the process.
Such mechanical properties and wear resistance can be obtained from the carbonization and quenching processes.
This hardening process includes a wide variety of techniques and is used to improve the mechanical properties and wear resistance of parts without affecting the softer, tough interior of the part.
By this carburization process the mechanical and wear properties of low carbon steel samples increased considerably.

Studying the Factors Affecting De-Emulsification of Crude Oil Zolfa.
There are many methods of de-emulsifying, including physical (thermal, mechanical, and electrical), chemical, and microbiological, but the chemical method remains the most widely used and commons method (4).
To our knowledge, no research on the water-oil separation model has been published that takes into account droplet dynamic properties with the coupling effect of chemical and centrifugal.
Table (2.1): Physical properties of crude oil Property Basrah crude oil Density at 30° C 0.878 API 29.5 Salt content (%wt) 0.0021 Asphaltene (%wt) 2 Water and Sediment content(%vol) 0.05 Kinematic Viscosity (Cst) at 30° C 22.7 Sulfur content %wt 3.3785 2.2.
Effect of Demulsifier Properties on Destabilization of Water-in-Oil Emulsion.