Roller Compacted Concrete Pavement (RCC) mixture proportioning procedures differ from those for conventional concrete. The methods can be placed in either one of two broad categories: (ⅰ) Proportioning by the concrete consistency test, or (ⅱ) by the soil compaction test. Broadly speaking, the engineering properties of RCCP are similar to those of conventional paving concrete. The structural behaviour of RCC is generally similar to that of conventional ― weight concrete, and that RCC can be treated much like conventional concrete when designing pavement thickness. The design procedures used for RCCP are similar to conventional concrete pavemeat, in that it is based on keeping flexural stresses and fatigue damage in pavement caused by wheel loads within allowable limits. The procedures developed by the Portland Cement Association (PCA), IRC: 58 method and the US Army Corps of Engineers, USA are being used for designing RCC pavements. These agencies have developed typical design charts from which the pavement thickness for a particular loading can be found out. The construction of RCCP involves production, placement and compaction of a very stiff concrete mix. RCC mix needs a vigorous mixing water evenly through out the matrix. The most commonly used mixer is the twin-shaft pugmill mixer, although batch rotary drum mixers have also been used. The former has a relatively large output capacity and provides good mixing efficiency. Ready mixed concrete (RMC) mixing plants have been used economically.
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