Product Data Sheet Show all documents

Sika® Plastiment® VZ

Water Reducing and Retarding Concrete Admixture

Sika® Plastiment® VZ is a water based, liquid, set-retarding admixture that slows the chemical action of cement hydration, delaying the initial set in direct proportion to the dosage used. After the planned delay in initial set, hardening develops at an accelerated rate.
Suitable for use in hot and tropical climatic conditions.

Sika® Plastiment® VZ provides the following beneficial properties:
  • Controlled setting times
  • Increased setting time in hot weather
  • Accelerated hardening after setting
  • Improved workability without increased water content
  • Reduced water content without loss of workability
  • Increased strengths
  • Reduced shrinkage and creep
  • Long lasting control of slump loss
  • Superior surface finish
  • Does not contain chlorides or other steel corrosion promoting ingredients
Product Data Sheet Show all documents

Usage

Sika® Plastiment® VZ is used as a water reducing and set retarding admixture in structural and mass concrete where a controlled extension of setting time is required, such as:
  • Large volume pours
  • Avoidance of cold joints
  • Construction joints without formwork
  • Long hauls
  • Difficult placing conditions
  • At elevated ambient temperatures
 

Advantages

Sika® Plastiment® VZ provides the following beneficial properties:
  • Controlled setting times
  • Increased setting time in hot weather
  • Accelerated hardening after setting
  • Improved workability without increased water content
  • Reduced water content without loss of workability
  • Increased strengths
  • Reduced shrinkage and creep
  • Long lasting control of slump loss
  • Superior surface finish
  • Does not contain chlorides or other steel corrosion promoting ingredients

Packaging

200 L drums and 1000 L flow bins

Colour

Yellowish brown liquid

Product Details

Sustainability / Certifications / Approvals

APPROVALS / CERTIFICATES

Sika® Plastiment® VZ follows the requirements of ASTM C494; Types B and D and EN 934-2
Product Information

Composition

Aqueous solution of modified carbohydrates

Shelf life

12 months from date of production if stored properly

Storage conditions

Store in undamaged, unopened, original sealed packaging in dry conditions at temperatures between +5 °C and +45 °C. Protect from direct sunlight and frost.

Density

~1.19 (+25 °C)

Total Chloride Ion Content

Nil

(EN 934-2)
Technical Information

Concreting Guidance

The standard rules of good concreting practice for production and placing must be observed when using Sika® Plastiment® VZ in concrete. Refer to relevant standards.
Fresh concrete must be cured properly especially at high temperatures in order to prevent plastic and drying shrinkage. Use Sika® Antisol® products as a curing agent or apply wet hessian.

Application

Application Information

Compatibility

Sika® Plastiment® VZ may be combined with all types of Portland cement, concretes containing pozzolanic materials such as; GGBS, PFA , micro-silica and the following Sika product ranges:

  • Sika® ViscoCrete®
  • SikaPlast®
  • Sikament®
  • Sika Aer®
  • SikaPump®
  • Sika® FerroGard®-901
  • SikaFume®
  • SikaFiber®
  • Sika Aer®
  • Sika® Stabilizer
  • Sika®-1 WT

We recommend to perform trial mixes to establish the required performance when combining Sika® Plastiment® VZ with the above or other admixtures. Please consult our Sika Technical Department.

Dispensing

Sika® Plastiment® VZ is added to the gauging water or simultaneously poured with it into the concrete mixer at the batching plant.
Do not add Sika® Plastiment® VZ directly to the dry mix.
For optimum utilization we recommend thorough mixing at a minimum wet mixing time of 60 seconds.
The addition of the remaining gauging water (to fine tune concrete consistency) may only be started after two-thirds of the wet mixing time to avoid surplus water in the concrete.
Consumption

Recommended Dosage

0.2 - 2.0 % by weight of binder
Higher dosages by weight of binder can be used depending on the mix design, raw materials, climatic conditions and concrete requirements.
Trial mixes must be performed to establish the exact dosage rate required.

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