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The Basic Characteristics of RAC and Mechanical Properties from Experimental Chao Gao1, a ,Zhu Pan1, b, Shaoxia Gao, Baochu Yu, Hongfei Mao 1Dalian Ocean University, Dalian, Liaoning116023 a gc@dlou.edu.cn, b panzhu@163.com Keywords: regeneration aggregate concrete (RAC), natural aggregate concrete (NAC) surface structure, apparent density, bulk density, water absorption, mechanical properties Abstract: This paper focuses on mechanical properties of RAC, And other relevant characteristics of RAC, also made lateral comparison with NAC.
Another because the internal transverse crack produced with concrete broken, and the surface often wrapped a layer of cement mortar, so both the short-term performance such as the strength of concrete workability or long-term performance such as endurance, RAC mostly less favourable than natural aggregate concrete(NAC).Through introduction comparison of the RAC and NAC,this paper elicits some characteristics and development of RAC,also the use of the required attention. 1.The surface structure of recycled aggregate Aggregate particles refers to particles of macro geometry, it is the important geometrical properties for granular materials, the particle shape quality directly affect the new mixing concrete workability and hardened concrete strength and durability.Although there is much differences between RA and NA, and even affect the intensity, however through experiment we found this strength gap can be defined by using standardized ,as long as the allowable range, this strength gap
Cement mortar after hardening have low density and roughness surface, a large number of cracks within the process of breaking making it’s void larger, these factors necessarily make stacking density and the apparent dencity of RA below NA.
Table IV Bibulous rate from C20 ~ C50 bibulous time RA（original concrete strength） NA C20 C30 C40 C50 10min 4.06% 4.07% 4.15% 3.28% 1.01% 30min 4.46% 4.27% 4.15% 3.28% 1.01% 30h 4.67% 4.47% 4.36% 3.48% 1.62% From three conclusion we summarized above, bibulous rate of regeneration aggregate is unable to achieve low bibulous rate standard of natural stone,for the production itself, the bibulous rate of fine aggregate is higher than the coarse aggregate, and decrease with the increase of particle size, the water absorption of recycled aggregate is also related to its apparent density, and increase rapidly with its apparent density decrease. 4．Mechanical properties in experiment a.
References [1]Olorunsogo.F.T.Early age properties of recycled aggregate concrete.

ORCID 0000-0001-8099-8584 E-mail: doina-cezara.albu@student.tuiasi.ro Keywords: limestone block, compressive strength, water absorption, physical properties, mechanical properties.
The present experimental study aims to contribute to the knowledge of the physical-mechanical properties of limestone blocks quarried in the Republic of Moldova.
This research is significant for the variation of the physical-mechanical properties of Moldovan limestone blocks compared to the same properties of other types of masonry blocks.
Limestone blocks in the Republic of Moldova have been widely quarried since the 50s and 60s of the 20th century, mainly being used for the construction of residential buildings, but we can also find buildings dating back to the 18th-19th century made of this material. (2) The mechanical properties of limestone blocks change over time under the influence of natural and anthropogenic factors.
The physical and mechanical properties of limestone are extremely heterogeneous, but at the same time, these properties depend directly on the structure and texture.

Four factors have been listed: the effect of improper structure design and installation, the effect of quality of filter bag and poor filter cages.
According to the understanding, dust filter bag prone to the impact of the factors: At first, the filter bag products quality processing are particularly important.
According to the dust we choose the suitable properties of its filter material, so that the filter bag can normal adsorption dust, and do not affect its service life.
The type of cage used will affect the life of the filter bags.
Herein, four common factors causing the filter bag damage are concluded: i) The diameter difference between the filter bags and the cage is very importance.

At this time, the physical and mechanical properties of reclaimed rubber, such as tensile strength, tear strength and elongation at break rate, is the best.
By simulation analysis and experimental studies, using new twin-screw extruder to achieve the regeneration of waste tires has some main factors that affect the regeneration, such as screw speed, reaction temperature and screw configuration.
When the screw speed changes in the range of 60 ~ 90r/min, the physical and mechanical properties of reclaimed rubber is better
When the reaction temperature changes in the range of 170~210℃, the physical and mechanical properties of reclaimed rubber is better.
Too high or too low screw speed and reaction temperature will lead to the physical and mechanical properties of recycled rubber decreasing, thus affecting the performance of the use of reclaimed rubber.

The mechanical properties of kenaf bast composites (KBC) and kenaf core composites (KCC) were studied by performing flexural and impact testing.
The effect of acid concentration on the mechanical properties & crystallinity of bio-composites was studied.
Silkworm silk/poly(lactic acid) biocomposites: Dynamic mechanical, thermal and biodegradable properties.
“Green” composites from recycled cellulose and poly(lactic acid): Physico-mechanical and morphological properties evaluation.
Fundamental factors affecting biomass enzymatic reactivity.

This paper established the ternary compound system of PC/PLA/ABS by melt blending and studied the impact of adding ABS and compatibilizer ABS-g-MAH on the composite’s morphology, thermal properties, rheology and mechanical properties.
In addition, ABS-g-MAH effectively improved the compatibility of the composites as well as mechanical properties of materials.
Mechanical properties were tested by the universal mechanical tester (provided by SUNS Company of Shenzhen), and notched impact strength in mechanical properties was tested according to GB/T 1843-96 standard.
Therefore, taking all factors into consideration, the appropriate ratio of ABS should be 30% of PC / PLA mass.
The experiment tells us that ABS has an influence on the system's thermal properties, mechanical properties and rheological properties.

Effect of Printing Temperature on Mechanical Properties and Surface Quality of Photosensitive Resin Rapid Prototyping Parts Xian-yong Zhu1,2,a, Fei-fei Cui1,b, Cheng Jiang1,c, Dong-ni Geng2,d, Xue-lei Xu1, e and Yun-chao Zhou1, f 1School of Machinery Science and Engineering, Jilin University, Changchun 130022, China 2Engineering Training Center, Jilin University, Changchun 130022, China azhuxy@jlu.edu.cn, bcuiff@jlu.edu.cn, cjiangc@jlu.edu.cn, dgengdn@jlu.edu.cn, exuxl@jlu.edu.cn, fzhouyc@jlu.edu.cn Keywords: Printing temperature, Photosensitive resin, Rapid prototyping, Performance, Mechanical properties, Surface quality Abstract.
Mechanical performance test.
At the same time, the temperature also affects the transformation of the C = C double bond.
And curing degree and C = C double bond is the main factor to mechanics performance of rapid prototyping parts .
The surface quality of the rapid prototyping parts of photosensitive resin affects by the photosensitive resin composition, layer thickness, the transmission depth, resin viscosity, and many other factors, and printing temperature only affects surface tension, viscosity of the resin, but not influences the composition of the resin, layer thickness and other factors.

This paper investigates the mechanical properties of SR and HA composite with various phr loading of HA (0 - 30 phr).
Osteoporosis is one of the factors of bone loss.
The paper presents the mechanical properties of HA/SR with 7 phr of loading variations (0 - 30 phr).
This result is affected by many factors such as physical activities [11], age [2], sex [19] and osteoporosis [14].
P, Bone Mechanical Properties And Changes With Osteoporosis, Injury, Int.

Extrusion molding performance of the profiles, the law of microstructure and mechanical properties were studied when billets pretreatment and extrusion temperature were changed.
Introduction Currently, one of the key factors that limit the application of magnesium alloy on the railway-train is lack of large-size wide and hollow magnesium profiles.
When the angle is found to be 0o or 90o, basal plane slip system orientation that is the size of Sch-mid factors and tensile twinning is the main factor to affect mechanical properties[3,4,5].
The mechanical properties of different parts of wide and hollow AZ31 magnesium alloy profiles are non-uniformity.
The mechanical properties of the same part of the profiles are anisotropy obviously.

Their mechanical properties have a great effect on the automobile performance, especially on duration, vibration, noise and energy saving.
Many efforts [1-3] have been made to investigate their mechanical properties, deformation and failure behavior for improving the tire design and structural analysis.
Since the mechanical properties is related to the chemical structure, Fan et al.[4] assessed the effect of the crosslink structure on the dynamic mechanical properties of the natural rubber before and after aging at different thermal aging conditions.
Although numerous papers focused on the properties of rubber under different aging conditions, to our knowledge, little work is concerned with the mechanical properties of the aged cord-rubber composites.
The latter is also a major factor affecting the overall properties of the composites besides the constituent materials [7], while its effect is not taken into account in the classical theory of composites.