Product Overview

Centrament Plast 300 is a mid-range water-reducing and plasticising admixture from MC-Bauchemie formulated on a synergistic lignosulphonate and polycarboxylate ether (PCE) hybrid chemistry — a blended admixture technology that combines the set-retarding and slump-retention properties of lignosulphonate with the high water-reduction efficiency of PCE to produce a mid-performance admixture positioned between the standard plasticiser (Centrament Plast 200) and the high-range PCE superplasticiser (Centrament Flow 250) in the Centrament range. The hybrid formulation delivers a water reduction of 10 to 18 percent at constant slump — above the 5 to 10 percent capability of standard lignosulphonate plasticisers but below the 20 to 30 percent of high-range PCE superplasticisers — making it the appropriate specification for M30 to M45 structural concrete grades where: the concrete quality required exceeds what a standard plasticiser can deliver (higher strength, lower permeability, better durability); but the full high-range PCE cost and sensitivity of mixing is not warranted (the structure does not require C50 or SCC performance, and the ready-mix operation prefers a more tolerant admixture). The mid-range water reduction of Centrament Plast 300 translates to tangible concrete quality improvements over standard lignosulphonate: a 15 percent water reduction in an M35 mix from w/c 0.45 to w/c 0.38 improves the predicted 28-day compressive strength by approximately 8 to 12 MPa and reduces the chloride diffusion coefficient by a factor of 2 to 3, significantly improving the durability of columns, beams, and slabs in the Delhi NCR carbonation and urban pollution environment. The moderate set-retarding property (approximately 1.0 to 2.0 hours at standard dosage) from the lignosulphonate component provides useful slump retention for ready-mix supply in medium-distance Delhi NCR concrete deliveries. Space Arc Engineering supplies Centrament Plast 300 for ready-mix concrete producers, on-site batching plants, and structural concrete contractors across Ghaziabad, Delhi NCR, Noida, and Uttar Pradesh.

Applications

• M30 to M45 structural concrete for residential and commercial buildings — dosing Centrament Plast 300 for the structural frame concrete (columns, beams, elevated slabs) of mid-rise to high-rise residential and commercial buildings in Delhi NCR, where the structural engineer has specified M35 or M40 grade concrete requiring a water-cement ratio below 0.45 and a workability appropriate for pump delivery at 120 to 150 mm slump
• Ready-mix concrete production for medium-distance delivery — adding Centrament Plast 300 to ready-mix truck concrete at the Ghaziabad, Noida, and Faridabad batching plants for structural concrete delivered to construction sites within 30 to 60 minute transit distances, where the combined plasticising and slump-retention properties maintain workable concrete on arrival without field water addition
• Pumped concrete for elevated slab and shear wall construction — improving the pumpability of M30 to M40 concrete for pump delivery to elevated slab formwork at 5 to 15 storey heights in building construction, where the mid-range water reduction achieves the required low w/c ratio and the slump maintenance ensures reliable pump performance over 1 to 2 hour pour durations
• Mass concrete for large raft slabs and pile caps — incorporating Centrament Plast 300 in large-volume raft slab and pile cap pours where the moderate retarding effect extends the workable life of successive concrete placements and reduces the cold joint risk in large pours, combined with the water reduction improving the density and reducing the heat of hydration peak in mass concrete elements
• Precast concrete element production (normal curing) — using Centrament Plast 300 in precast beam, column, and slab production at precast yards using water curing or steam curing at temperatures below 60 degrees Celsius, where the mid-range plasticiser provides adequate water reduction and workability for a wide range of structural precast grades without the high dosage sensitivity of high-range PCE products
• Waterproofing-grade structural concrete — incorporating Centrament Plast 300 in M35 to M40 waterproofing-grade concrete for basement raft slabs, retaining walls, and underground structure concrete to achieve the low w/c ratio (0.40 to 0.42 maximum per IS 456 for very severe exposure) required for inherent concrete impermeability before any supplementary waterproofing membrane or coating treatment is applied

Key Advantages

• 10 to 18 percent water reduction — mid-range performance bridges the gap between standard plasticisers and high-range superplasticisers — the appropriate specification for M30 to M45 concrete where standard plasticiser performance is insufficient but high-range PCE cost and sensitivity are not warranted
• Slump retention from lignosulphonate component — the moderate set-retarding and slump-retention characteristic of the lignosulphonate fraction provides useful workable life extension for ready-mix supply in medium-distance Delhi NCR deliveries — better slump retention than pure PCE products at the same water reduction level
• Forgiving dosage tolerance — the hybrid lignosulphonate-PCE chemistry has wider dosage tolerance than pure high-range PCE — easier to manage in ready-mix batching plant operations and on-site mixing plants where precise admixture dispensing control may be variable — less risk of overdosing effects (excessive retarding, false set) than pure high-range PCE at equivalent water reduction
• Compatible with PPC, OPC, and blended cements — Centrament Plast 300 performs reliably with the full range of Portland cement types used in Delhi NCR concrete production including OPC 43, OPC 53, PPC (fly ash blended), PSC (slag blended), and composite cements
• Improved concrete durability at equivalent cement content — the 10 to 18 percent water reduction at constant workability and cement content delivers measurably lower water-cement ratio and permeability without requiring additional cement — a direct durability gain for structural concrete in Delhi NCR without mix design cost increase
• Cost-effective mid-tier performance — Centrament Plast 300 pricing is between standard lignosulphonate (Centrament Plast 200) and high-range PCE (Centrament Flow 250) — cost-proportionate to the performance level delivered, providing value for M30 to M45 structural concrete where the full high-range PCE specification is over-performance and over-cost