APPENDIX C-Continued 



TABLE A 1. 5.2.3— APPROXIMATE MIXING WATER 

 REQUIREMENTS FOR DIFFERENT SLUMPS AND 

 MAXIMUM SIZES OF AGGREGATES (METRIC)' 



40 iOt 701 150t 





No 



n-alr-entr3lncd con 



Crete 









3 10 5 



209 



200 



185 



180 



160 



155 



149 



125 



8 to 10 



225 



21! 



200 



195 



179 



170 



160 



140 



IS to IS 



240 



230 



210 



205 



189 



ISO 



170 



— 



Approximate 

 araounl o( 

 entrapped 



alr-en- 



















3 



2.9 



2 



1.5 



1 



0.9 



OJ 



02 



pcrcent 























Mr-ent 



rained 



concr 



ete 









3 to 9 



ISO 



175 



165 



160 



H5 



140 



135 



120 



8 to 10 



200 



190 



180 



175 



160 



155 



150 



139 



15 to IB 

 Recom- 

 mended 

 average 



215 



S 



205 

 7 



190 



185 



5 



170 

 4.5 



165 

 4 



160 

 3.5 



3 



percent 



















•These quantities of : 



al batches. They 



In computing 



ixima for rea- 



ggregates graded within 



containing aggregate lari 



TABLE Al.5.2.4(«)— RELATIONSHIPS BETWEEN 



WATER-CEMENT RATIO AND COMPRESSIVE 



STRENGTH OF CONCRETE (METRIC) 





mpresslve stre 

 28 days, kgl/c 



?,•> 



Water-cen- 



entra 



Ho. by 



weight 



Cj 



Non-air-entra 

 concrete 



Ined 



Air 



entrained 







450 





0.38 







_ 







400 





0.43 







— 







350 

 300 



250 

 200 

 190 





0.48 

 0.55 

 0.62 

 0.70 

 O.BO 







0.40 

 0.4< 

 0.53 

 0.61 

 0.71 



estimated average strengths for 



For a constant water-ci 



daya at 23±:1.7C in accordance with Section e(b) of ASTM 

 C31 (or Making and Curing Concrete Compression and Flexure 

 Test Specimens In the Tield. Cube strengths will be higher 

 by approximately 20 percent. 



Relationship assumes r 

 to 30 mm; for a given 

 water-cement ratio will- ., 

 see Sections 3.4 a'nd 6.3.2. 



of aggregate about 20 

 Ji produced by a given 

 laximum size decreases: 



TABLE AI.5.2.4(bJ— MAXIMUM PERMISSIBLE 



WATER-CEMENT RATIOS FOR CONCRETE IN 



SEVERE EXPOSURES (METRIC)* 



Type of Structure 



Structure wet continuously 

 or frequently and exiwsed 

 to freezing and thawlngt 



structure 

 exposed to 



sea water 

 or sulfates 



Thin sections (railings, 

 curbs. Bills, ledges, 

 ornamental work} and 

 section! with leu than 

 3 cm cover over itecl 



All ether itructurci 



0.45 



0.flO- 



0.40t 

 0.45t 



report of ACT Committee 201, "Durability of 



•Based ... _^, 



Concrete In Service, previously cited, 



tConcrete should also be alr-entralned. 



lU sulfate reilftlng cement (Type U or 

 C ISO) U uied, permliitble wattr-ctment 



Al. 5.2.7 Step 7. Estimation of fine aggregate 

 content. In the metric system, the formula for calcula- 

 tion of fresh concrete weight per cubic meter is'. 



Um = lOGa(lOO-A) +C«(l-Go/G<) _ Wm(Go-I) 

 where 



Um = weight of fresh concrete, kg/m* 



Go = weighted average specific gravity of combined 



fine and coarse aggregate, bulk. SSD 



Gc = specific gravity of cement (generally 3.15) 



A = air content, percent 



Wm = mixing water requirement, kg/m* 



Cm = cement requirement, kg/m* 



Al.5.2.9 Trial batch adjiLslments. The follow- 

 ing "rules of thumb" may be used to arrive at closer 

 approximations of unit batch quantities based on 

 results for a trial batch: 



Al. 5.2.9.1 The estimated mixing water to pro- 

 duce the same slump as the trial batch will be equal 

 to the net amount of mixing water used divided by 

 the yield of the trial batch in m'. If slump of the 

 trial batch was not correct, increase or decrease the 

 re-estimaled water content by 2 kg/m^ of concrete 

 for each increase or decrease of 1 cm in slump desired. 



Al.5.2.9.2 To adjust for the effect of in- 

 correct air content in a trial batch of air-entrained 

 concrete on slump, reduce or increase the mixing water 



TABLE A 1. 5.2.6— VOLUME OF COARSE 



AGGREGATE PER UNIT OF VOLUME 



OF CONCRETE (METRIC) 



PROPORTIONS FOR NORMAL AND HEAVYWEIGHT CONCREtE 



Maximum sUe 



Volume 

 per uni 



of dry-rodded coarse aggregate* 

 volume of concrete for different 

 flnpnp'is moduli! of sand 



2.40 



2.60 



2.80 



3 00 



10 



OJO 



0.4S 



0.46 



044 



12.S 



0.59 



0.57 



0.55 



053 



20 



0.66 



0.64 



062 



0.60 



25 



0.71 



0.69 



0.67 



063 



40 



0.76 



0.74 



0.72 



0.70 



SO 



0.78 



0.76 



0.74 



0.72 



70 



0.81 



0.79 



0.77 



0.7J 



I» 



0.87 



0.85 



083 



0.81 



described In ASTM C 29 for Unit Weight of Aggrega 

 These volumes are selected from empirical relatl< 

 produce concrete with a degree of workability suitable for 



. in dry-rodded condition . 

 ishlps 



Ing. they may be redui 



tFlneness modulus of sand = 

 talncd on sl( 

 2.38. and 4,76 



workable concrete such 



construction they may be 



• workable concrete, such as 



equired when placement Is to be by pump- 



with square openings of 0.14B, 0.297, 0.S99. 1.10, 



TABLE Al.5.2.7.1— FIRST ESTIMATE OF 

 WEIGHT OF FRESH CONCRETE (METRIC) 





Tint estimate of concr 



etc welfht, kf/m» 



Maximum size 

 of aggregate, 



Non-alr-entralned 

 concrete 



Alr-entrslncd 

 concrete 



10 



228S 



21M 



12.5 



2319 



•w^^ 



20 



2399 



32N 



25 



2375 



2319 



40 



2420 



2355 



SO 



2445 



2379 



70 



2469 



MOO 



190 



290S 



3439 



'Values calculated by Eq. 



richness (330 kg of cement ^_ -. 



aggregate epeclnc gravity of 2.7. Water requirement! baaad 



and medium slump with 



tlon I 



' of weight may be refined ; 



np In Table Al.S.2.3. If desired, the aiU- 



follo 



if neceuary Inforau- 



allable: for each a kg difference In mixing water from 



the Table A1,5.2J values for 8 to 10 " " 



weight per m» 8 ki 



slump, comet tb* 

 direction: for each 10 ki 

 content from 330 kf, corr«ct the w«tcbt 

 ptr m* 3 kg In the same direction; for each 0.1 by which «f- 

 fregate specific gravity deviates from 2.7, corrvct tht concw it 

 weight 70 kff in the same dlrtctlon. 



332. 



