Sikament® RB 918

• ASTM C-494 Type B, D & G
• EN 934-2: T11.1/11.2
• IS 9103

12 months from date of production if stored in unopened, undamaged and original sealed packaging.

The product must be stored properly in undamaged, unopened original sealed packaging in dry conditions at temperatures between +5° C and
+35° C. Protect from direct sunlight and frost.

> 6

≤ 0.2% (EN 934-2)

1.2 ± 0.03

Sikament® RB 918 is compatible with most admixtures used in the production of quality concrete including normal, other mid-range and high-range water-reducing admixtures, air entrainers, accelerators, retarders, extended set- control admixtures, corrosion inhibitors, and shrinkage reducers.
Sikament® RB 918 is also compatible with slag and pozzolans such as fly ash, metakaolin and silica fume.

Optimum dosage of Sikament® RB 918 should be determined with trial mixes. As a guide, a dosage range of 400ml to 1200ml per 100kg of cementitious material is recommended as a starting point. In high performance concrete, a dosage up to 1800ml per 100kg of cementitious material can be added subject to prior site trials.

Effects of Over Dosage:

A severe over-dosage of Sikament® RB 918 can result in the following:

• Long extension of initial and final set
• Increase in air entrainment
• Bleed/segregation of mix, quick loss of workability
• Increased plastic shrinkage

A slight overdosing may not adversely affect the ultimate strength of the concrete and can achieve higher strengths than normal concrete, provided it is properly compacted and cured. Due allowance should be made for the effect of fluid concrete pressure on form work, and stripping times should be monitored.

Sikament® RB 918 is a ready-to-use liquid which is dispensed into the concrete together with the mixing water. The plasticising effect and water reduction are higher if the admixture is added to the damp concrete after 50 to 70% of the mixing water has been added. The addition of Sikament® RB 918 to dry aggregate or cement is not recommended. Automatic dispensers are available.