By ACI Committee 207
Roller-compacted concrete (RCC) is a concrete of no-slump consistency in its unhardened kingdom that's as a rule transported, positioned, and compacte utilizing earth and rockfill development gear. This record comprises using RCC in constructions the place measures may be taken to deal with the iteration of warmth from hydration of the cementitious fabrics and attendant quantity switch to lessen cracking. fabric blend proportioning, homes, layout concerns, development, and qc are lined.
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Additional resources for ACI 207.5R-11 - Report on Roller-Compacted Mass Concrete
External measures include a number of features discussed herein. • The seepage control measures used for particular facing systems can be used for most of the other facing systems. Drains can be installed between the membrane and RCC; • The use of bedding mixture between the lifts can substantially improve watertightness and bond along horizontal lift joints. This practice has become the more common approach to reducing seepage at lift joints; • Added watertightness can be achieved by using a simple swelling strip waterstop that is impregnated 37 with chemical grout.
Simple analyses that combine very generalized conditions yield very general results. Complex analyses combine very specific determination of conditions to yield more exacting results. As a minimum, designers should consider the daily and monthly ambient temperature fluctuations, the conditions in aggregate production and RCC mixing that lead to an RCC placing temperature, a realistic placing schedule, and realistic material properties. In many cases, the results of a thermal study are key to determining mixture proportions, construction schedule, cooling requirements, and jointing requirements.
Paradise Dam (formally Burnett Dam) in Australia had panel damage during a drawdown of the reservoir. 9 RCC cast concurrently with consolidated concrete facing—If a conventional concrete appearance or added durability is desired, conventional concrete can be used for the facing (Fig. 5(c) and (d)). A common method of constructing a conventional concrete face is to concurrently place the RCC with the facing concrete. No anchors or reinforcement other than that necessary to stabilize formwork are used to anchor the facing concrete to the RCC (Fig.
ACI 207.5R-11 - Report on Roller-Compacted Mass Concrete by ACI Committee 207