Search results
Results from the WOW.Com Content Network
The cast tape only dries from one side, the exposed surface, as the casting surface is impermeable. Drying is dependent on two processes, namely the evaporation of the solvent from the surface, and the diffusion of the solvent through the tape towards the single exposed surface. The evaporation may be sped up by applying air drying.
Most metals and alloys shrink as the material changes from a liquid state to a solid state. Therefore, if liquid material is not available to compensate for this shrinkage a shrinkage defect forms. [3] When progressive solidification dominates over directional solidification a shrinkage defect will form. [2]
Shrinkage has great significance because any expansion or shrinkage can cause deformation of the product, which could be a severe concern for the end-user, and the brand can lose its reputation. [7] Secondly, in the garment-making industry, consumption of the fabric is calculated in yards, so any variance than permissible limits is unacceptable ...
In practice, creep during drying is inseparable from shrinkage. The rate of creep increases with the rate of change of pore humidity (i.e., relative vapor pressure in the pores). For small specimen thickness, the creep during drying greatly exceeds the sum of the drying shrinkage at no load and the creep of a loaded sealed specimen (Fig. 1 bottom).
Yet another solution is a process called soil stabilization, in which additional materials are added to the soil to limit its ability to shrink and swell. [7] Materials for stabilization include cement , resins , fly ash , lime , pozzolana , or lime-pozzolana mixture, [ 7 ] depending on the site conditions and the project goals.
Laundry hung on a clothes line in a drying room (dehumidifier in the background and duct for ventilation in the ceiling) Drying is a mass transfer process consisting of the removal of water or another solvent [1] by evaporation from a solid, semi-solid or liquid. This process is often used as a final production step before selling or packaging ...
Further drying of the wood results in strengthening of the wood fibres, [1] and is usually accompanied by shrinkage. Wood is normally dried to a point where it is in equilibrium with the atmospheric moisture content or relative humidity, and since this varies so does the equilibrium moisture content. Laboratory testing has found the average FSP ...
The maximum dry density is finally obtained from the peak point of the compaction curve and its corresponding moisture content, also known as the optimal moisture content. The testing described is generally consistent with the American Society for Testing and Materials (ASTM) standards, and are similar to the American Association of State ...