AN INTEGRATED CONCRETE/FORMWORK LIFE CYCLE

The purpose of this section is to introduce formwork operation as an integrated part of the whole building process and to explain some of the terminology used in concrete and concrete formwork. The process of providing formwork and concrete is highly inte­grated. The left circle in Figure 1.2 represents the formwork life cycle, while the right circle represents the concrete construction life cycle. The two intersecting points represent the beginning and the end of the concrete construction life cycle.

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The life cycle of formwork starts with the ‘‘choose formwork’’ activity. The physical activities in the formwork life cycle are repre­sented by these steps: (1) fabricate formwork; (2) erect formwork; and (3) remove formwork. The concrete construction life cycle

starts after the ‘‘fabricate formwork’’ activity and ends before the ‘‘remove formwork’’ activity. The function of the formwork life cy­cle is to provide the structure with the specified shape and size, while the function of the concrete construction life cycle is to pro­vide the structure with concrete of specified strength, durability, and surface texture. A brief description of each stage of both the concrete and formwork life cycles is given below.