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ROOFPLAST PC 455
- Admixture for self compacting concrete
- Slump loss in ready mix
- High-rise concrete pumping
- Fly ash and GGBS mixes
ROOFPLAST PC 455 is a next-generation chloride-free, polycarboxylic ether (PCE)-based high range water reducer and slump retention plasticiser, compliant with IS 9103-99 and AS 1478 Type WR. Ideal for high-strength, self-compacting, high-level pumping and precast/prestressed concrete — delivering superior water reduction, slump retention, high early compressive strength and resistance to shrinkage and cracking. Compatible with micro silica, GGBS and fly ash. Used in dams, bridges, runways, highways and high-rise buildings.
Specifications
Figures are controlled laboratory results. Actual site performance varies with substrate, temperature, humidity, application method and workmanship — please confirm the current product datasheet before specification.
Where to use ROOFPLAST PC 455: PCE superplasticizer for high-strength concrete
ROOFPLAST PC 455 is a PCE superplasticizer, a single component, chloride-free liquid based on polycarboxylic ether technology. It works as a high range water reducer and slump retention plasticiser for high-strength, self-compacting and pumped concrete. This slump retention admixture is dosed per bag of cement and is compatible with micro silica, GGBS and fly ash.
Self-Compacting Concrete
High water reduction lets concrete be placed with less vibration.
High-Strength Structural Concrete
Concrete grades above M40 are achievable with this admixture.
Elevated Pumping Concrete
Slump retention keeps the mix pumpable for high-level pours.
Precast & Prestressed Concrete
High early compressive strength, with centering removal in 3–4 days.
High-Rise Buildings
Used for high-level pumping on tall structures.
Dams, Bridges & Runways
Resists shrinkage and cracking in large infrastructure pours.
Highways & Pavements
High-strength, high-durability concrete for highway and pavement work.
Ready-Mix Concrete
Target slump retention of 80–120 mm for ready-mix loads.
Micro Silica / GGBS / Fly Ash Blends
Compatible with all three supplementary materials in blended cement mixes.
Standard dosage is 300–600 g per 50 kg cement bag, rising to a maximum of 1 kg per bag for greater flowability. To control slump loss in ready mix concrete, target slump retention is 80–120 mm. Chloride content is nil, tensile strength is 5.2 N/mm² and flexural strength 8 N/mm² at 28 days, and the product complies with IS 9103-99. As an admixture for fly ash GGBS concrete it suits blended cements. Do not use it alongside naphthalene sulphonate plasticisers.
Armstrong Chemicals supplies ROOFPLAST PC 455 to sites across Telangana, Andhra Pradesh, Karnataka, Kerala and Tamil Nadu, including Hyderabad, Vijayawada, Bengaluru, Kochi and Chennai.
Next-Generation Slump Retention for Demanding Concrete
A polycarboxylic ether (PCE) high range water reducer that holds slump while reducing water-cement ratio — delivering 40 N/mm² at 28 days for self-compacting, pumped and precast concrete in dams, bridges, runways and high-rise buildings.
Get a QuoteThe Limitation of Conventional Plasticisers
Standard lignosulphonate and naphthalene sulphonate plasticisers improve workability at placement, but slump loss over time means concrete poured into complex formwork, pumped long distances, or delayed in transit can lose workability before it's placed.
The ROOFPLAST PC 455 Advantage
A 3rd-generation PCE admixture that reduces water-cement ratio while retaining slump — keeping concrete workable from the mixer to the pour, with less vibration required for compaction.
Superior Slump Retention
PCE technology maintains target slumps of 80–120mm across transit and placement — essential for pumped concrete, self-compacting concrete and long hauls in ready-mix applications.
Multi-SCM Compatible
Compatible with micro silica, GGBS and fly ash in blended cement concrete mixes — one admixture across the full range of high-performance and sustainable concrete specifications.
Approved at India's Most Demanding Projects
Dams, bridges, runways and highways across R&B, Irrigation and Panchayat Raj projects.
Thermal and Hydel power projects and industrial concrete works.
High-rise buildings, reservoirs, corporate and private sector structures.
Dosage Guidance
| Application Type | Dosage per 50kg Cement |
|---|---|
| Standard concreting | 300–600g per 50kg bag |
| Lean mixes / hand-mixed / high fluidity | Up to 1kg per 50kg bag (maximum) |
NSF incompatibility: slump retention and pumpability may be affected when used alongside naphthalene sulphonate (NSF)-based plasticisers. Do not combine without prior trial testing.
Over 600g and up to 1kg per bag may cause a delay in setting time and produce very high flowability, workability and extra designed high early strength. For specific application method guidance, contact the ROOFPLAST PC 455 technical representative.
Next-Generation Concrete Performance
3rd-generation polycarboxylic technology for self-compacting, pumped and precast concrete.
PCE 3rd-Generation Technology
Polycarboxylic ether chemistry achieves higher water reduction and longer slump retention than conventional NSF or lignosulphonate plasticisers — the same technology used in high-performance concrete globally.
40 N/mm² at 28 Days
Achieves 10.5 N/mm² compressive strength per day with 40 N/mm² at 28 days and 5.2 N/mm² tensile strength — enabling high early stripping of formwork and accelerated construction programmes.
IS 9103-99 & AS 1478 Compliant
Dual-standard compliance across Indian (IS 9103-99) and Australian (AS 1478 Type WR) standards — with NIL chloride content for reinforced and prestressed concrete.
Multi-SCM Compatible
Designed to work with micro silica, GGBS and fly ash — suitable for all supplementary cementitious material blends used in high-performance and sustainable concrete.
Which plasticiser for your concrete grade
Armstrong admixture selection guide
Applicable Areas
Packing & Storage
Available in 5kg, 20kg, 30kg and 225kg packs. Shelf life of 1 year in a cool, dry place — store away from sun heat and fire.
NSF Compatibility Warning
⚠️ Slump retention and pumpability may be affected when ROOFPLAST PC 455 is used alongside naphthalene sulphonate (NSF)-based plasticisers. Use either ROOFPLAST PC 455 or an NSF plasticiser — not both in the same mix without prior trial testing.
SCM Compatible
Fully compatible with micro silica, GGBS and fly ash — suitable for all blended and supplementary cementitious material (SCM) concrete mixes used in high-performance and sustainable construction.
Product Brochure
Download Technical Datasheet
Full specifications, application systems, layering guides, and coverage tables.
Frequently Asked Questions
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