Shrinkage unrestrained

The commonly used ratios of admixture to cement for the purpose of shrinkage compensation are 9-11 (admixture) to 91-89 (cement). At these ratios the properties of CS A concrete are similar to Portland cement concretes of similar mix proportions. At admixture dosages exceeding 11% however, concrete workability and strength decrease, while expansion and air entrainment increase. When expansion is unrestrained and exceeds 0.3%, strength is reduced [74],... 

ASTM D2732, Unrestrained linear thermal shrinkage of plastic film and sheeting, 19X3. 

BS 6319 Part 12 1992 Methods for measurement of unrestrained iinear shrinkage and coefficient of thermal expansion... 

FIGURE 3.15 Finite difference mesh in the case two-dimensional drying with shrinkage (a) before deformation (b) after deformation. Broken line—for unrestrained shrinkage, solid line—for restrained shrinkage. 

It is well known that most synthetic fibres and continuous filament yams will to a greater or lesser extent shrink when exposed (in unrestrained state) to high temperatures. In addition, due to tensions imposed on fibres and yams during processing, further shrinkage is to be expected due to relaxation... 

Unrestrained Shrinkage When solids shrink volumetrically (majority of food products does), their volume is usually related to moisture content by the following empirical law ... 

D2732 Unrestrained Linear Thermal Shrinkage of Plastic 11501... 

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