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Products \ Early-strength admixture superplastisizer in concrete mixes and mortar \ Early-strength admixture superplastisizer SP-7

 Early-strength admixture superplastisizer
 Modification SP-7

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Additive SP-7 cement hardener has high plasticizing, hardening and modifing effects. It is produced on specification of Ukraine 26.5-30751392-001-2002 coordinated with public health ministry of Ukraine. It is undangerous material, doesnt have chlorine ions and corrosion action against steel reinforcement.

Using SP-7M and its modification

stipulates:
  • Reduction of water quantity in concretes and mortar mixes to 25-30%;
  • Acceleration effect of hydration processes in cement and more full usage of its potential facilities;
  • Expansion of the range of application including repair and other special works.
it makes possible:
  • making concretes with compressive resistance to 80106 pascal without extra components and special methods of manufacturing;
  • rise length of existence, water resistance, freeze-thaw durability and corrosion resistance(including resistance to sulfate) of concrete products; reduce cement consumption to 20 % or make substitution of Portland cement PC500 on PC400, PC400 on PC400 or on PSC400 with the same compressive resistance of the concrete;
  • reduce temperature of thermal and moist curing of products to 30 - 40 °, get from 50 to 100% planning concrete strength in 12÷24 hours.
guarantee:
  • reducing expenditure of energy and efforts in pilling and concrete consolidation;
  • high turnover of curb at monolithic building;
  • improving quality of products;
  • possibilities to concreting in winter conditions even to -15 °.

Effect of SP-7M addition is controlling by batching. Independence on desirable effect the expence of dry addition can vary in range from 0.5 to 1.5% of cement weight.

Modifications of SP-7:
  • SP-7 recommended for precast structural concrete.
  • SP-7 prolonging time retention mobility of concrete; recommended for ready-mixed concrete and winter concreting.
  • S-7ap - antifreeze admixture for masonry mortar and plasters.
External view: brown tints powders.
Additions were tested and embedded in:
  • Research Institute "Kharkiv PromstrojNIIProect" test record 69 from 17.08.2002.; resolution from 03.10.2002.;
  • Research Institute "GosdorNII" (Kyiv) test record 52 from 29.07.2003
  • Public corporation "Ukrhydroproekt" (Kharkiv) resolution from 14.02.2003;
  • National research institute "Ukrdicement" (Kharkiv) resolution 130- from 08.10.2002;
  • Concrete product plants (Kharkiv) 5, 348, "Zhilstroy-2", "Kharkovmetrostroy", SKSM, DRSU and also on other enterprises of Ukraine.

Examples efficiency of addition

1) Non-moist technology (addition expense is 1.4% of cement weight).
Allows to get 70% of designed compression strength with temperature of maturing 30 - 40 °. After 28 days samples have 150 - 170% of designed compression strength. Water resistance of concrete is W10-W12.

2) for different grade of cement:
water-cement ratio,
relative unit
slump, cm compression strength,
x106 pascal
Note
1
day
2
day
7
day
28
day
1
0,46
9 12,2 19,2 25,2 41,2 Concrete base is PC-500* without plasticizer
2
0,39
8 20,2 36,8 57,5 68,2 0.7% of plasticizer
3
0,37
9 26,2 40,4 60,8 76,0 1.4% of plasticizer
4
0,40
cast 16,6 29,4 52,2 72,0 1.4% of plasticizer
5
0,38
9 17,8 35,4 42,2 53,5 1.4% of plasticizer ( 20% PC-500)
6
0,39
8 9,0 17,5 28,1 52,2 1.4% of plasticizer (substitute PC-500 on PSC in concrete*)
7
0,41
8 16,9 21,6 35,4 45,0 Concrete base is PSC** without plasticizer
8
0,34
8 25,1 36,5 39,1 61,5 1.2% of plasticizer based on PSC**
* - concrete mix based on PC-500:
PC-500 - 470 kg.
Sand - 450 kg
Broken stone - 1420 kg.
Designed grade 40.0 Mpascal
* - concrete mix based on PSC-400:
PSC-400 - 580 kg.
Sand - 476 kg
Broken stone - 1168 kg.
Designed grade 40.0 Mpascal

3) For different temperatures of maturing (addition - 1,2%):
  30° 22 ° 12 °
Compression strength of concrete,
pascal
12 h. 22,0 - 24,0        
16 h. 28,0 - 30,0        
1 day 40,0 - 42,0 1 day 27,0 1 day 19,5
2 days 46,0 - 48,0 2 days 36,0 2 days 29,5
7 days 59,0 - 63,0 7 days 48,0 7 days 44,0
28 days 68,0 - 72,0 28 days 66,0 28 days 48,5

Control sample without plasticizer have room-temperature compression strength 40.0 pascal after 28 days. Using cement PC-500 in quantity 460 kg/m3 without additions, slump 7 - 8 sm.

4) for positive temperature (0,7 % of addition):

Name of material water-cement ratio, relative unit Compression strength, Mpascal
1 day 7 days 28 days
Concrete without addition 0,48 14,0 32,5 47,5
With addition 0,40 24,5 47,8 65,6

Cement PC-500 was used for concrete; slump - 6 cm.

5) for negative temperature (1,5% of addition):

  • Grade of concrete 35.0 MPascal, slump - 18 cm, based on PC-400 maturing with temperature + 12 ° (1 day). Than temperature was lower to -10 °, after this compression strength on 6 day was 65-75% of designed value.
  • The same concrete was maturing with temperature 30-35 ° 16 in hours, than with temperature -10 °. Compression strength after 3 day was 65-80% of designed value.


 Early-strength admixture superplastisizer
 Modification SP-7c


Function:
For summer and winter concreting in mixes based on Portland cement and Portland-slag cement.

Application field:
Making custom concrete, precast concrete, repair and reconstruction of objects of civil and industrial function.

Technical data:
Addition SP-7 doesnt have toxic components and no dangerous materials and also doesnt have chloride ions and doesnt have corrosion effect on steel reinforcement.

Method of application:
Dry SP-7 is prior dissolved in water at room temperature or to density 1.16-1.18 g/cm³, than solution is added to mixing water. A possible variant is SP-7 adding into mix without prior dissolving.

Effect of SP-7M addition is controlling by batching. It depend on desirable effect and discharge of dry addition can vary in range from 0.5 to 1.5% of cement weight.

Solubility SP7- in the dependence on temperature of solution
Temperature, °C 2 4 6 8 10 12 14 16
Weight, g/l 200 207 224 240 250 264 300 340
Density (t=19.5C), g/cm³ or kg/l 1,102 1,105 1,114 1,122 1,127 1,134 1,152 1,173

APPLICATION INSTRUCTION

For super plasticizer SP-7

Dry SP7-M is dark brown powder. For making liquid plasticizer powder must be dissolved by gradually adding to water (temperature of water is 20-40°) with agitation.

For making 10 liters of liquid plasticizer required 2.5 kg of dry material. Density of solution will be 1,12-1,13 g/cm³ (controlled by areometer). Consist of dry rest 0,25 kg/l.

SP-7 is added as liquid in mixing water.

It is necessary to keep liquid addition in close package (for unchanged density of it when water will be explusion) and at temperature no less than + 5 °.

Bulk additive can be kept in package at any temperature.

Retention cycle is unconditioned.

DOCUMENTS









 

 

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