ABSTRACT
STUDY OF T H E EFFECTIVENESS OF WATERREDUCING ADDITIVES ON C O N C R E T E WITH MICROSILICA J . C . A R T I G U E S , J . C U R A D O and E . I G L E S I A S Concrete Admixture Research Department, T E X S A S . A . , Barcelona, Spain
1 Introduction
2 Experimental methods
3 R e s u l t s
1 7 28 90
1 - - 2 . 2 0 . 4 6 9 9 94 184 228 246 2 10
1.8 0 . 5 1 6 8 94 221 296 326 3 10 A , 0 . 4 3.1 0 . 4 4 0 8 . 5 130 281 390 398 4 10 B, 0 . 7 2 . 8 0 . 4 3 8 8 . 5 128 268 373 379 5 10 c , 1 .4 2 .1 0 . 4 6 0 8 108 251 337 376 6 10 D, 0 . 0 3 4 . 5 0 . 4 9 1 8 85 191 286 291 7 10 E , 0 . 7 2 0 . 4 6 2 8 97 223 341 345
8 -
- 2 . 2 0 . 4 9 6 8 91 185 214 249 9 - A , 0 . 4 3 . 5 0 . 4 4 2 8 122 236 278 311
10 -
B, 0 . 7 3 . 2 0 . 4 4 0 8 112 221 265 288 11
c , 1 .4 2 . 6 0 . 4 4 7 8 112 205 256 301 12
- D, 0 . 0 3 6 .1 0 . 4 8 6 9 73 158 167 194
13 -
E , 0 . 7 2 . 7 0 . 4 6 0 8 97 190 223 261
14 _ _ 1 .9 0 . 5 7 7 17..5 77 160 193 243 15 10
1.2 0 . 6 5 0 17 76 201 286 290 16 10 A , 0 . 8 3 . 6 0 . 5 2 6 17 84 284 397 416 17 10 B, 1 . 2 2 . 6 0 . 5 2 5 17..5 119 264 382 430 18 10 c , 2 . 4 1 .6 0 . 5 5 3 18 100 259 326 347 19 10 D, 0 . 0 6 8 . 5 0 . 6 1 6 17 4 3 . 5 131 179 250 20 10 E , 1 .2 1 .7 0 . 5 7 2 17 81 221 289 314
21 _ _ 1 . 9 0 . 6 3 0 1 8 . 5 83 174 200 234 22
A , 0 . 8 4 . 2 0 . 5 4 2 19 7 7 . 5 223 278 324 23 - B , 1 . 2 3 . 2 0 . 5 3 4 19 110 230 260 324 24
c , 2 . 4 2 . 6 0 . 5 4 0 20 100 209 251 280 25
- D, 0 . 0 6 9 0 . 6 1 2 19 4 3 . 5 104 127 139
26 -
E , 1.2 2 .1 0 . 5 3 3 19 97 195 223 273
27 _ _ 2 . 2 0 . 4 6 0 8 97 205 231 254 28 10
1 . 9 0 . 5 0 7 8 104 227 302 339 29 10 A , 0 . 8 3 . 8 0 . 4 2 7 8 132 296 407 423 30 10 B, 1 .2 3 . 3 0 . 4 2 2 8 150 287 393 407 31 10 c , 2 . 4 2 .1 0 . 4 5 2 8 135 274 365 392 32 10 D, 0 . 0 6 6 . 4 0 . 4 9 0 8 98 185 274 284 33 10 E , 1.2 2 0 . 4 5 4 8 129 237 359 370
4 Conclusions
0.4 0.5 0.6 0.7
% Loss of weight 16 r
14 -
1 2 3 4 5 6 7
2 8 3 9 4 10 5 11 6 12 7 13
References
T H E INFLUENCE OF SUPERPLASTICIZER TYPE A N D D O S A G E ON T H E COMPRESSIVE STRENGTH OF PORTLAND C E M E N T C O N C R E T E IN T H E PRESENCE OF F L Y ASH M . C O L L E P A R D I , S. M O N O S I and M . P A U R I Department of Science of Materials and Earth, University of Ancona, Italy S. B I A G I N I and I. A L V E R A M A C - M B T , R & D Laboratories, Treviso, Italy
A b s t r a c t The e f f e c t o f s u p e r p l a s t i c i z e r t y p e - Sulphonated Naphtalene Polymer SNP, or Sulphonated Melamine Polymer SMP - and o f i t s dosage r a t e (2 o r 4% by weight o f cement) on compressive s t r e n g t h of c o n c r e t e mixes c o n t a i n i n g f l y ash (15% by weight of cement) , has been s t u d i e d . The r e s u l t s of t h e p r e s e n t paper i n d i c a t e t h a t t h e combined a d d i t i o n of s u p e r p l a s t i c i z e r and f l y ash i n c r e a s e s c o n c r e t e s t r e n g t h a t a g i v e n w o r k a b i l i t y . The h i g h e s t s t r e n g t h i n c r e a s e o c c u r s i n f l y ash c o n c r e t e mixes when type I I I P o r t l a n d cement and SMP s u p e r p l a s t i c i z e r type (at a 4% dosage r a t e ) a r e used. Key words: F l y ash, S u p e r p l a s t i c i z e r , Naphtalene s u l p h o n a t e d polymer, Melamine s u l p h o n a t e d polymer.
