Sika® Plastiment® PH 993

• ASTM C-494 Type A, D, and G
• BS 5075 Part 1

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

Sika® Plastiment® PH 993 must be stored where temperatures do not drop below +5°C. If product has frozen, thaw at +5°C or above and completely reconstitute using mild mechanical agitation. Do not use pressurized air for agitation. Store under cover, out of direct sunlight and protect from extremes of temperature.

≥ 6

< 0.2%

1.08 ± 0.02 at 25°c

Sika® Plastiment® PH 993 is compatible with most of the products under the MasterPozzolith & MasterSet series (formerly known as POZZOLITH) including MasterSet RT 55. Use MasterMatrix 2 (formerly known as Glenium Stream 2) as viscosity modifying agent in self compacting concrete. Sika® Plastiment® PH 993 is not compatible with Melamine or Naphthalene based admixtures and should not be used in conjunction in the same mix. Sika® Plastiment® PH 993 is compatible with lingo- sulphonates and carboxylic acid based plasticiser and retarders and also with most type of air- entrainers, accelerators, retarders, extended set- control admixtures, corrosion inhibitors, and shrinkage reducers. Sika® Plastiment® PH 993 is also compatible with slag and pozzolans such as fly ash, metakaolin and silica fume.

Optimum dosage of Sika® Plastiment® PH 993 should be determined with trial mixes. As a guide, a dosage range of 600ml to 2000ml per 100kg of cementitious material is normally recommended. Because of variations in concrete materials, job site conditions, and/or applications, dosages outside of the recommended range may be required.

Effects of Over Dosage
A severe over-dosage of Sika® Plastiment® PH 993 can result in the following:

• Reduced permeability
• Long extension of initial and final set
• Increase in air entrainment
• Bleed/segregation of mix

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.
 

Sika® Plastiment® PH 993 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 Sika® Plastiment® PH 993 to dry aggregate or cement is not recommended.
Thorough mixing is essential and a minimum mixing cycle, after the addition of the Sika® Plastiment® PH 993, of 60 seconds for forced action mixers is recommended.