\ smile emoticon(1)- ( ) ( ) ( ( = zero shear ...... 2- ( = zero moment ) 3/5 ..... (2)- 3 .. 4(3)- 28 - 28 :- (4)- cover cover :- cover :- 2.5 5-7 :- (5)- .. - :- = ( ) 162(6)- 30*70 - (30*70) :- 10 = (30*2)+(70*2)+20 = 220 .......(7)- - 7870 / 3 : ( 2200-2300) /3 : ( 2400-2500) /3(8)- - : 25*12*6 = = (9)- 60 30 3 = * = (0.3*0.6*3)*2500 = 1350 (10)- :- :- :- : (11)- : :-1- 2- 3- 4- 5- :-1- 2- 3- 4- 5- 6- 7- 8- ( ) :-1- () 2- 3- 4- () 5- ( ) 6- 7- 8- ( ) :-1- 2- 3- 4- 5- 6- 7- 8- 9- 10- ........11- :-1- 2- 3- 4- 5- 6- 7- 8- 9- ( )10- 11- (12)- 2*3 ... 1- 2*3 ............ (13)- 2- slump test ? :- (Workability) (14)- ........ (6) (15)- .8 3 .4 3 1- 0.4 0.8 ( ) (16)- 1- 2- (17)- ............... (18)- - :- (19)- - :-