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- These Mitsubishi `
<br /> dealers can show
<br /> RCC. .
<br /> YOU ' quirements can have an adverse im-
<br /> pact on overall embankment dam
<br /> t 1t' qtx ty Yr r+;4r .J. •+••1 :.=;, ,z;• construction economics. With an•• �•� :--61 .r--. ,-, ;; i - 1_u RCC gravity dam, floodwater can
<br /> C:;:ierenee. • 'f^ r.--�..�-` - _-.=:.. 4 be spilled directly over the dam crest
<br /> --- by way of an overflowspillway, thus
<br /> -- �, _ rt
<br /> 1 ti-ter?- -:' eliminating the need for a conven-
<br /> t '.,"':i-.
<br /> j i.•.••:4STRUCTION _ „ : ' r, 5.T_:� tional separate side channel spillway.
<br /> •_ ':HINERY CORP. . ..- ' Such a structure can typically con-
<br /> � r
<br /> ' r stitute a significant line item in the
<br /> ?ox 99096 -• - construction budget."
<br /> 'v Decimal Drive -( ;'' g t ----.....s.0.-:•
<br /> Decimal
<br /> KY 40231 r-_' - . `,, Logic pointed out that for place-
<br /> 267.9000
<br /> ` ment of approximately 2 million cu-
<br /> !,.c :CH +- . — _. bic yards or less, a minimum per
<br /> 9 Llox 1742 €in • =r cubic yard advantage of about 1:2 is
<br /> C�,
<br /> Rag, Drive '- - , t
<br /> +sbaro, KY 42301 ._� Y. • *1 -- realized with RCC versus conven-
<br /> •: 683.2000 : Tom•tl?s :''�_-t- Y- tionally constructed mass concrete
<br /> NCH ' ;y gravity dams,
<br /> ' 2 , � y + rr, CC differs from conventional
<br /> Box 154 A '.`
<br /> r �n, IL 62959 concrete chiefly in its dry con-
<br /> }982-2112 ii 62 William Oinchak sistency. It is a zero-slump mix that
<br /> contains less cement that conven-
<br /> �4 -DIANA EQUIPMENT tional concrete. "By being able to
<br /> J., INC: for gravity dam construction, re- place it in such a dry form, less wa-
<br /> J1 Box 68555. placing the use of conventional con- ter is used," Logic told Construction
<br /> 2� 0 Zionsville Road crete and even challenging the Digest. "So, the water-cement ratio
<br /> - •t Si. 'anapolis, IN 46268 economics of earthfill and rockfill decreases. Thus, for the same ce-
<br /> :, ") 872.8410 embankment dams." ment content you can develop much
<br /> :,.c_"; ANCH He pointed out that the Willow greater strength. For a specific de-
<br /> r D. Box 1139 $ $
<br /> ''
<br /> -4 w.Coliseum Road Creek Dam was completed in ap- sign requirement, you can reduce
<br /> -.):j Wayne, IN 46856. proximately one-third the estimated the cement content required."
<br /> 119) 482-9517 • time required for an alternate rock- The use of RCC depends on the
<br /> fill design and at approximately site conditions and materials. "It's
<br /> :ECO EQUIPMENT 50% of the cost (S14 million versus like any other design technique, it
<br /> n6420 Belmont-Morristown Rd. $27 million). has strong
<br /> 'Norristown, OH 43759 g points for certain appli-
<br /> (614) 782.1314 Willow Creek was built as a mon- cations," explains Ronald Southard,
<br /> 2014 Longwood Ave. olithic mass, thus it has no vertical president of Avery Structures, Inc.,
<br /> • Frank Rood Ind. Pork joints. In addition, it was con- Buena Vista, Col. "It's not a cure-
<br /> Grove City, OH 43123 strutted without cooling devices un- all." •
<br /> (614) 871-2884 like the .us[ornary concrete dam. Hopman says, "There are a lot of
<br /> S.R. 93 These differences, plus reduced la- different ideas in RCC. Most of the
<br /> Hamden, OH 45634 bor costs, contributed to the low different ideas originate because of
<br /> (614) 384-5621
<br /> construction cost of the dam. the different objectives that people
<br /> STEVE'S EQUIPMENT Logic stated, "At a given height, are trying to achieve. A 2-foot lift is
<br /> SERVICE, INC. the RCC gravity dam contains a great for my area. For another job
<br /> 29 W. 581 North Avenue much smaller volume of construe- - with a smaller dam that has an-
<br /> West Chicago, IL 60185 Lion material. This, together with other type of aggregate and differ-
<br /> (312) 231-4840 the speed of the RCC construction ent weather conditions — it would
<br /> BRANCH method, results in a much shorter be quite different."
<br /> P.O. Box 6362 construction time than that required The techniques for aggregate pro-
<br /> 6915 W. Chicago Ave. for embankment dams. Therefore, cessing and mixing vary
<br /> Gory IN 46406 g y greatly, ac-
<br /> (219) 949-9595 RCC construction has considerable cording to a paper presented by
<br /> appeal in areas where the construe- Dinchak and Hansen at the Miami
<br /> MIDCO EQUIPMENT CO. tion season is short, and in general, International Conference on Alter-
<br /> MIDCO SALES & SERVICE has an economic advantage in the native Energy Sources in Miami
<br /> 11475 Page Service Road time factor of cost. Beach, Fla., in 1982. Mixing can be
<br /> P.O. Box 28729 "Also, appurtenant structure similar to conventional concrete that
<br /> St. Louis, MO 63146 _ location/elimination and construe- is weigh batched and mixed in a
<br /> (314) 872-8440 tion alternatives
<br /> provided by RCC standard drum mixer or continuous
<br /> v�•�»S�B�SH� offer additional economic advan- mixing methods may be used. Con-
<br /> .TS++P,.ae,,y,,,, rages. Spc if icaily, spillway, energy tinuous mixing may be in a tilt drum
<br /> l-€tit--I.°.Lrry DIFFERENCE dissipa[or and intake structure re- continued
<br /> [ • Conttryctjn Digest..August 1, 1985
<br /> 31
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