shrinkage


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shrinkage

Commerce the loss of merchandise in a retail store through theft or damage

Shrinkage

A decrease in dimensions occurring when a material experiences temperature changes.

Shrinkage

 

reduction in the linear dimensions and volume of materials caused by loss of moisture, contraction, hardening, and other processes. The shrinkage of ceramics and concrete is of considerable importance. Molded clay products are subject to shrinkage during drying and firing. The shrinkage of concrete occurs during air hardening and is due to the evaporation of water from the capillaries in cement rock. The shrinkage of metals and metal alloys during crystallization is due to the reduction in volume on transition from the liquid state to the solid, the additional reduction in volume on cooling from the solidification point to room temperature, and the penetration of molten metal into the inner part of the congealing mass and all the cavities and cracks formed during molding of the ingot or shaped casting.

Reduction over time in the vertical dimensions of structural components, such as stone and wood walls and heat-insulating fill, is often called settling.

shrinkage

[′shriŋ·kij]
(engineering)
Contraction of a molded material, such as metal or resin, upon cooling.
Contraction of a plastics casting upon polymerizing.
(geology)
The decrease in volume of soil, sediment, fill, or excavated earth due to the reduction of voids by mechanical compaction, superimposed loads, natural consolidation, or drying.

shrinkage

1. The reduction in dimensions of a piece of wood during drying; reduction is very slight along the grain, but a reduction of 5 to 6% in width is common for dry flat-sawn boards.
2. The volume decrease of concrete caused by drying and chemical changes.
3. The proportionate decrease in dimensions or volume of a material, usually as a result of a change in temperature.
References in periodicals archive ?
In addition, the present study shows that tissue shrinkage after tissue resection may confound the accurate measurement of margin size (Table 1, 2).
This may occur because of tissue shrinkage during histological processing.
The unit volumetric shrinkage and volumetric shrinkage of the mass of safflower grains were determined by calculating the ratio between the volume of the product at a certain instant and its initial volume (Eq.
and Beckermann, Ch., "Prediction of the Fatigue Life of Cast Steel Containing Shrinkage Porosit," Metallurgical and Materials Transactions A, Nr.
The mean values of fabric shrinkage % (warp wise) for 4 types of finishes [F.sub.1] up to [F.sub.4] are given in Table 3.
A total of 81prisms of size 25 x 25 x 275 mm (27 mixtures x 3 replicates) were cast for monitoring the drying shrinkage. The specimens were first cured in a water tank for 3 days after casting.
The phenomenology of shrinkage was established by measurements on edge-gated 355.6 x 177.7.8 x 3 [mm.sup.3] (14 x 7 x 0.118 in.) rectangular plaques, schematically shown in Fig.
After mixing process, the slump test was carried out and followed by taking 100 mm cubes for compression test, cylinders of 100 mm diameter and 200 mm height for splitting tensile test, and prisms of 100 x 100 x 300 mm for drying shrinkage strain.
According to the Chinese current code GB/T 50082-2009 (ordinary concrete long-term performance and durability test method standard), the measured methods of concrete shrinkage are divided into the contact measuring method and the noncontact measuring method.
In practice, the restrained shrinkage evolution can be reduced using special types of mixes allowing for diminishing amount of cement paste.
In high-performance/high strength concrete of low w/c ratio, the early-age cracking canbe due to three processes occurring simultaneously, which are shrinkage (i.e., autogenous shrinkage and drying shrinkage), hydrate heat development, and stress relaxation.