Self-compacting concrete (SCC)

The work, step by step

General guidance based on the manufacturer data sheets. Site conditions differ: confirm the system with MCT before you start. Where we do not name a product, ask us and we will confirm the right one.

1. 1

   Step 1: Design an SCC mix

   SCC needs its own mix proportions, not just more admixture (Sika ViscoCrete-58 HT-PK p.1). A pre-trial with local materials must confirm the dosage (Sika ViscoCrete-3355 p.2).

2. 2

   Step 2: Choose the SCC superplasticiser

   Sika ViscoCrete-3355 is made for high-flow and self-compacting concrete with up to 30 % water reduction (p.1); dose 0.4–1.5 % of binder for flowing and SCC (p.2). Self-compacting properties can last more than 1 hour at 30 °C depending on the mix (p.1). ViscoCrete-3110 PK uses 0.4–1.5 % for SCC (p.2); ViscoCrete-58 HT-PK 0.3–1.5 % (p.2).

   Sika ViscoCrete-3355 Sika

   Sika® ViscoCrete®-3355 facilities extreme water reduction, excellent flowability with optimal cohesion and strong self-compacting behavior. ® 3355 is used for the following types of concrete: High flow concrete, Self-compacting, concrete (S.C.C.), Concrete with high water reduction (upto 30%), Hi… (TDS p.1)

   Pack

   05 ltr jerry can

   Sika ViscoCrete-3110 PK Sika

   Production of site mixed and ready-mix concrete During hot weather production of concrete with extended transportation or placing times Concrete with low water / cement ratio Concrete placement in congested steel reinforcement Self-compacting concrete Slim … (TDS p.1)

   Pack

   05 ltr jerry can

   Sika ViscoCrete-58 HT-PK Sika Request a quotation

   Sika® ViscoCrete®-58 HT-PK is mainly used for the following applications: For all Piling application including C.F.A, Concrete Containing GGBS, Micro Silica, Fly ash, Etc, Concrete in hot & windy weather with extended transportation and workability requirements, Production of Ready Mixed Concrete… (TDS p.1)

   Pack

   05 ltr jerry can

3. 3

   Step 3: Precast and fast-stripping SCC

   Sika ViscoCrete-20 HE gives high early strength for precast and SCC; use 1.0–2.0 % of cement for SCC (p.1, p.2).

   Sika ViscoCrete-20 HE Sika

   Production of concrete mixes which require high early strength development, powerful water reduction and improved flowability. (TDS p.1)

4. 4

   Step 4: Batch and mix

   Add the admixture with the gauging water, wet mix for at least 60 seconds, and add the remaining water only after two-thirds of the mixing time (Sika ViscoCrete-3355 p.2). With ViscoCrete-58 HT-PK, wet mix at least 2 minutes per m³ (p.2). Never add to dry cement (p.2).

5. 5

   Step 5: Formwork and placing

   SCC stays fluid for longer, so formwork must be properly installed and secured (Sika ViscoCrete-3355 p.2). Seal form joints to stop paste loss. No vibration is needed (Sika ViscoCrete-58 HT-PK p.1).

6. 6

   Step 6: Cure

   Cure properly and start curing as early as possible (Sika ViscoCrete-58 HT-PK p.2). A curing compound can be sprayed on exposed concrete surfaces (Sikafloor ProSeal W p.1).

   Product for this stepAsk us

   The right product here depends on your site. We confirm it before naming it.

Steps and product facts are taken from the manufacturer data sheets (page cited). Products are named only where the data sheet confirms the use; quantities follow a site visit or photos. General guidance: check the data sheet or ask us before you start.