The lower temperature used the longer drying time took but the material surface hardening shrinkage was less and the apparent quality was better .

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Research on Process Characteristic of High-gloss Surface Part Injection Technology : Warpage Shrinkage and Sink Index

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The results have shown that addition of non - organic filling might effectively solve the problems of felt disclosure decrease the surface shrinkage cave spots and improve the product smoothness .

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The surface reaction layer and linear shrinkage met the accuracy requirements of dental demands .

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It was found in the production practice with using kiss gating-feeder that some defects including top surface depression and shrinkage at kissing area etc.

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Unbound aggregate base can efficiently retard the reflexion of cracks to asphalt pavement surface which is aroused by the shrinkage crack of semi-rigid base in the inverted structure .

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A polymer concrete with merits of quick hardening high compressive strength high flexural strength good bonding with old road surface and low shrinkage for rapid repairing of highway grade separated bridge and viaduct was prepared .

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The crack of big volume reinforced concrete base mainly consistes of surface temperature crack and vertical shrinkage crack .

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Mold temperature is the main impact factor for the surface layer shrinkage . Similarly it can reduce shrinkage by keeping relatively low mold temperature .

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Using self-feeding in solidification can make good surface quality no shrinkage casting defects of castings ; the technology product yield of the casting greatly increases .

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The casting is easy to suffer from deformation surface sink and internal shrinkage .

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When castings solidify as a sequence manner and squeeze force effectively acts on the surface of the liquid metal the shrinkage porosities in the castings are eliminated and mechanical properties are increased obviously .

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AFM Analysis of Surface Nanostructure and Polymerization Shrinkage Properties of Three Types of Composite Resins

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However before the use of life most of the road in our country have appeared serious structural damage . The reason for asphalt surface reflective cracks caused by semi-rigid shrinkage crack become an urgent problem to be solved .

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The breaking strength u03c3 b relative elongation u03b4 and fracture surface shrinkage u03c8 of butt joint by light beam brazing are lower than those of brazed base material .

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Formation Reason and Prevention of Surface Shrinkage Depression and Cavity of Gray Iron Castings

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There is a good linear relationship between shrinkage strain and relative humidity reduction in different depths of concrete . However the surface layer concrete has a lower shrinkage than the internal layer concrete when they reach the same relative humidity .

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The acquired achievements are as follows : On the basis of the theories of solid deformation and solid surface energy developing a coal matrix shrinkage model that indicates the effects of the deformation of coal matrix shrinkage on the porosity and permeability of fractures .

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Using the finite element method to analyze the surface layer of asphalt added gravel base case temperature shrinkage cracking .

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Edge collapse honeycomb and surface voids in the slipform paving cement concrete and shrinkage of hardening concrete used in highways are studied in this paper which is a part of western traffic project frost resistance of cement concrete supported by traffic ministry of China .

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Research results : Pier concrete surface max tensile stress caused by concrete shrinkage and drop in temperature or heat of hydration is much greater than the split total stress of the dead and live load and exceed the concrete tensile intensity .

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Investigation was carried out on the compatibility between two shrinkage reducing agents and four superplasticizers on the solution surface tension the slump strength free shrinkage of concrete and mortar .

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In I-24-hour-R-12-hour MDQ group cells were found well adhering to the wall the surface was smooth without shrinkage and cleavage cells were observed .

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The causes and relative factors of the surface shrinkage trace for injected products are discussed and the design ideas of preventive and remedial measures are presented .

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There easily exists shrinkage porosity due to superheat of ingate root in large plain parts investment casting . Ingot defects may be broadly classified into internal flaws and surface flaws . Internal flaws are caused by shrinkage .

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Radial shrinkage in beryllium ring is the same far from the brazing seam but within 1 mm from the brazing seam outer surface is outward expand and inner surface is inward shrinkage .

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Solve the surface shrinkage of plastic products completely .

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This paper presents the researches about impacts of the contents kinds particle sizes of non - organic filling on surface shrinkage sunken spots and smoothness of GMT products . The mechanical properties of GMT filled with non-organic fillings are also tested .

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In the view of the process parameter that influences the sintering surface roughness dimension precision of PS part and the surface roughness and shrinkage being guideline the 3-factor and 3 - horizontal orthodoxy experiment is designed and processed .

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Ingot defects may be broadly classified into internal flaws and surface flaws . Internal flaws are caused by shrinkage .

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