Design considerations durability

The ability to appropriately design for thermal, water and reactant flow was essential in achieving durable stack designs, as mentioned throughout this chapter. A number of design considerations can provide both performance and durabiUty improvement some examples include ... 

Thompson JE (1990) Design considerations unique to sealants. In Postal CA (ed) Engineering materials handbook adhesive and sealants, vol 3, 3rd edn. ASM International, Materials Park Wolf AT (2009) Sealant durability and service life of sealant joints. In Mittal KL, Pizzi A (eds) Handbook of sealant technology. CRC Press, Boca Raton, pp 143-190... 

This paper examines key design considerations for durable polyolefin products in terms of additive selection. Special consideration is made in terms of selecting colorants that are considered non-toxic. A practical example is presented. 

Light-Duty Recreational Surfaces. Artificial surfaces intended for incidental recreational use, eg, swimming pool decks, patios, and landscaping, are designed primarily to provide a practical, durable, and attractive surface. Minimum cost is a prime consideration and has driven the quaUty of some such products to a low level. Most surfaces in this category utilize polypropylene ribbon and a tufted fabric constmction (see Olefin polymers, polypropylene). ... 

The major physical attributes of concrete as a construction material are a high compressive strength and stiffness, an ability to protect and restrain steel and, most important of all, to retain these properties over a considerable period of time. The effects that water-reducing admixtures have on these properties can be considered from the point of view of design parameters, i.e. those properties of concrete at a relatively early age (usually 28 days) which are used for structural calculations, and longer-term aspects or durability. 

Sulphur concretes have undergone substantial development in the last six years. Recent effort has been directed towards improved durability and less brittle stress-strain behaviour has been achieved. A technology has been developed to produce a material (Sudicrete) with the same stress strain behaviour after three years as that observed soon after casting. Other materials show a consistent reversion to brittle behaviour with time. Nevertheless, there is considerable room for improvement in mix design. 

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