About MC-Bauchemie MC-Ballastbond 70

{“name”:”MC-Ballastbond 70″,”slug”:”mc-ballastbond-70″,”brand”:”MC-Bauchemie”,”realProduct”:”yes”,”officialSource”:”https://www.mc-bauchemie.com/products/injection-systems/ballast-bonding/mc-ballastbond-70.html”,”category”:”grouts-anchors”,”metaTitle”:”MC-Ballastbond 70 | Ballast Bonding Resin | Space Arc”,”metaDescription”:”MC-Ballastbond 70 is MC-Bauchemie’s two-component PU resin for bonding railway ballast, split and loose rock, supplied pan-India by Space Arc Engineering.”,”heroSubtitle”:”The two-component polyurethane resin engineered to bond loose railway ballast into a stable, load-bearing mass — without blocking drainage.”,”glance”:{“whatIsIt”:”MC-Ballastbond 70 is a two-component, low-viscosity polyurethane (PU) reaction resin from MC-Bauchemie’s German injection-systems range, purpose-built to glue loose ballast, split stone and gravel into a bonded, tough-elastic mass while leaving the aggregate’s drainage capacity essentially intact.”,”whereUsed”:”Railway and metro ballast beds — especially at points, crossings, curves, shunting necks and level-crossing approaches — plus ballast shoulders during track renewal, siding and depot gravel aprons, and loose rock or split surfaces adjoining rail formation that need load-bearing consolidation.”,”whyUse”:”Loose ballast under repeated wheel loading migrates, churns and settles unevenly, forcing frequent tamping and ballast top-ups. Bonding the stone with MC-Ballastbond 70 locks the aggregate matrix in place, reduces lateral shift at high-stress zones, and can be reapplied selectively without lifting track or replacing ballast wholesale.”,”howApplied”:”Component A (base) and Component B (hardener) are metered 1:1 by volume through a two-component injection pump (MC-Bauchemie’s own MC-I 700 is a typical choice), blended in a static helix mixer over a 30 cm mixing length, and sprayed onto the ballast surface with a lance held roughly 20 cm off the stone in a closed fan pattern; the resin sets within about 10 minutes at normal site temperature.”},”about”:”Ballast bonding is a narrow but critical niche in track engineering: instead of replacing churned, migrating ballast, you glue the existing stone in place. MC-Ballastbond 70 is MC-Bauchemie’s polyurethane-based answer to that problem — a two-component duromer resin (Component A base, Component B hardener, mixed 1:1 by volume) that reacts on the aggregate surface to form a tough-elastic bond between stones. Because the reaction foams only mildly in contact with moisture, the treated ballast keeps most of its void structure and drainage path, which is the entire point of bonding stone rather than casting concrete over it. MC-Bauchemie built the product for exactly the loads Indian corridors are carrying more of: heavier axle loads on dedicated freight corridors, tighter curves and more frequent points and crossings on suburban and metro networks, and level crossings where mixed road-rail traffic accelerates ballast churn.\n\nSpace Arc Engineering carries MC-Ballastbond 70 as part of its authorised MC-Bauchemie portfolio for Delhi NCR and pan-India rail, metro and industrial-siding projects. Because MC-Bauchemie’s own India product catalogue lists the related MC-Ballastbond 80 grade rather than the 70, we typically source MC-Ballastbond 70 against a specific drawing or specification call-out — where a project is designed around this particular polyurethane chemistry, its documented compressive and slant-shear strength, or where an existing MC-Bauchemie-specified corridor needs product continuity. We supply the resin in its standard 1000-litre container, 200-litre drum or 20-litre canister packs per component, alongside the MC-KAT 27 accelerator and MC-Verdünnung PU cleaning thinner, and can support with application planning, pump and mixer selection, and on-site technical supervision for possession-window work.”,”technicalInsight”:”The chemistry is worth understanding before specifying it. MC-Ballastbond 70 sits in the low-viscosity band of MC-Bauchemie’s ballast-bonding range (200 ± 50 mPa·s at 21°C), which is what lets it wet out and coat individual ballast stones rather than pooling at a few contact points — a higher-viscosity resin would bond fewer stone-to-stone contacts per litre applied. The mild foaming reaction on contact with moisture is deliberate: it’s tuned to be limited enough that it doesn’t seal off the void network the ballast needs for drainage, unlike a fully-foamed rigid system that would start behaving like a slab. MC-Bauchemie’s own range makes this trade-off explicit across three grades — MC-Ballastbond 60 is the more sprayable, faster-reacting variant for lighter surface consolidation; MC-Ballastbond 70 (this product) is the general-purpose PU duromer for structural ballast reinforcement; and MC-Ballastbond 80, the grade actually listed on MC-Bauchemie’s India site, is an organo-mineral-based resin pitched at soil and fissure grouting and drinking-water-adjacent work. Choosing between them is a specification decision, not a stocking decision, which is why we always confirm the exact grade against the project’s technical documents before placing an order.”,”applications”:[“Ballast reinforcement at points, crossings and curves on railway and metro corridors carrying high or differential axle loads”,”Stabilising ballast shoulders and toe zones during track renewal, doubling or gauge-conversion works”,”Consolidating ballast at level-crossing approaches subject to mixed road-rail traffic churn”,”Bonding loose ballast or gravel in stabling yards, depot aprons and siding turnouts to raise load capacity”,”Protective bonding of ballast shoulders ahead of monsoon-season traffic to resist washout and migration”,”Consolidating loose split, rock or gravel surfacing where load capacity, colour retention or weed suppression is required”,”Selective, localised ballast stabilisation as an alternative to full ballast renewal on time- or budget-constrained possessions”,”Bonding loose rock and talus adjoining rail formation in hill or cutting sections prone to positional instability”],”advantages”:[“Bonds ballast stone-to-stone without materially blocking drainage, unlike solutions that seal ballast into an impermeable mass”,”Short reaction and application time (around 10 minutes) shortens the traffic-block or possession window needed per section”,”Tough-elastic rather than rigid bond absorbs cyclic wheel loading instead of turning ballast into a brittle slab”,”Sprayed onto the ballast surface rather than injected into the subgrade, so track geometry and profile stay undisturbed”,”Reactivity is field-tunable with the MC-KAT 27 accelerator to suit ambient temperature and site conditions”,”Flame-resistant resin formulation, relevant for work carried out near live electrified track and signalling assets”,”REACH-assessed for periodic water-contact exposure scenarios, a realistic condition for monsoon-exposed Indian ballast beds”,”Can reduce the frequency of tamping and ballast top-up cycles at chronic problem locations, lowering repeat maintenance spend”],”limitations”:[“Needs a calibrated two-component injection pump and static mixer on site — it is not a hand-mixed, trowel-applied product”,”Application must stop below 5°C or above roughly 40–45°C substrate/material temperature, in rain, or on wet gravel, narrowing the usable window in peak summer and monsoon”,”Requires trained applicator crews for correct mixing ratio, spray distance and fan pattern; Space Arc supplies it as a supervised application, not an over-the-counter material”,”Consolidates the ballast layer itself — it does not correct formation-level drainage faults or subgrade and subballast failures, which need separate rectification”,”Bulk pack sizes (1000 l container down to 20 l canisters) suit corridor-scale works and are uneconomical for very small patch repairs”,”Cleaning is solvent-based only (MC-Verdünnung PU) — water and water-based cleaners must never be used, so site housekeeping and PPE discipline are non-negotiable”],”bestPractice”:”Confirm the ballast is dry, clean and free of fines or contamination before spraying — moisture and dust are the two biggest causes of poor bond in the field. Meter Component A and B at the specified 1:1 ratio through a calibrated two-component pump, using a static helix mixer over the recommended 30 cm mixing length, and hold the spray lance about 20 cm off the ballast surface in a closed fan pattern rather than a direct jet. Plan the order quantity per square metre against the penetration depth the drawing calls for, not a flat coverage assumption. Respect the stated application-time window and flush the pump with MC-Verdünnung PU the moment work pauses beyond it, since partially or fully cured resin can only be removed mechanically. Track ambient and substrate temperature through the shift — work stops below 5°C or above the upper limit, in rain, or on visibly wet gravel — so build possession windows around a weather and temperature check, not just a traffic timetable.”,”specs”:[{“property”:”Chemistry / system”,”value”:”Two-component polyurethane (PU) duromer reaction resin”},{“property”:”Mixing ratio”,”value”:”1 : 1 by volume (Component A : Component B)”},{“property”:”Density”,”value”:”1.13 kg/dm³ (DIN 53 479)”},{“property”:”Viscosity”,”value”:”200 ± 50 mPa·s (EN ISO 3219)”},{“property”:”Compressive strength”,”value”:”40 N/mm² (EN 196 T1)”},{“property”:”Slant shear strength”,”value”:”13.3 N/mm² (BS 6319, Part 4)”},{“property”:”Flexural tensile strength”,”value”:”3.5 N/mm² (EN 196 T1)”},{“property”:”Application time (pot life)”,”value”:”Approx. 10 minutes at 21 ± 2°C / 50% RH”},{“property”:”Pack sizes”,”value”:”1000 l container, 200 l drum, or 20 l canister, per component”}],”useCases”:[{“sector”:”Indian Railways / dedicated freight corridor works”,”detail”:”Bonding ballast at points, crossings and curves on high-axle-load freight corridor sections to reduce tamping frequency between maintenance blocks.”},{“sector”:”Metro and suburban rail depots”,”detail”:”Consolidating loose ballast and gravel aprons in stabling yards and depot turnouts where shunting movements concentrate wheel loads.”},{“sector”:”Level crossings”,”detail”:”Stabilising ballast shoulders at road-rail level-crossing approaches, where mixed traffic accelerates aggregate churn and settlement.”},{“sector”:”Private industrial sidings (cement, steel, port)”,”detail”:”Reinforcing ballast on tight-radius curves subject to continuous wagon movement in captive rail sidings.”},{“sector”:”Hill-section and cutting formations”,”detail”:”Bonding loose rock, split and talus adjoining the rail formation where positional stability of the aggregate is safety-critical.”}],”faq”:[{“q”:”Does MC-Bauchemie sell MC-Ballastbond 70 directly in India, or do we need a distributor like Space Arc?”,”a”:”MC-Bauchemie’s own India product catalogue currently lists the related MC-Ballastbond 80 grade for ballast bonding rather than the 70. As an authorised pan-India MC-Bauchemie channel partner, Space Arc sources MC-Ballastbond 70 on indent against a specific project specification or drawing call-out, so factor in lead time and confirm the exact grade with your design consultant before ordering.”},{“q”:”Will bonding the ballast stop water draining through the track bed?”,”a”:”No — that’s the design intent. MC-Ballastbond 70 foams only mildly in contact with moisture, so the treated ballast retains essentially its normal void structure and drainage capacity; it is formulated specifically to avoid the drainage-blocking effect of a fully rigid, over-foamed resin.”},{“q”:”Can this be applied without a full traffic block?”,”a”:”It’s applied by spraying onto the ballast surface with a lance rather than by lifting track, and the resin sets in around 10 minutes at normal temperature, so cycle times per section are short — but you should still size your possession or traffic-block window to your application rate, equipment mobilisation and site access, not assume it can be done under live traffic.”},{“q”:”What equipment does our contractor need on site?”,”a”:”A two-component injection pump with adequate capacity (MC-Bauchemie’s own MC-I 700 is a common choice), a static helix mixer set for roughly 30 cm mixing length, a spray lance, and MC-Verdünnung PU thinner for flushing the pump during any pause beyond the resin’s pot life.”},{“q”:”How soon can the bonded ballast take traffic load?”,”a”:”The resin’s stated application time is about 10 minutes at 21 ± 2°C, but the point at which a treated section can safely take traffic load depends on ambient conditions, penetration depth and the project’s engineering sign-off — always confirm release criteria with MC-Bauchemie’s technical team or your design consultant rather than assuming a fixed hour count.”},{“q”:”What’s the shelf life, and how should we store it on site?”,”a”:”At least 18 months from manufacture, provided the original sealed packs are stored and transported between 5°C and 40°C in dry conditions — moisture ingress into an opened container is the main risk to shelf performance, so drying agents or immediate resealing are recommended once a pack is opened.”}],”positioning”:”MC-Ballastbond 70 sits within MC-Bauchemie’s small, purpose-built ballast-bonding family: MC-Ballastbond 60 is the faster, more sprayable variant for lighter surface consolidation, MC-Ballastbond 80 is the organo-mineral grade that MC-Bauchemie’s own India catalogue lists for soil and fissure grouting and drinking-water-adjacent work, and both pair with the MC-KAT 27 accelerator and MC-I 700 injection pump for site application. Globally, polyurethane ballast-stabilisation resins are a niche a handful of European specialists compete in — BASF’s Elastocoast system is the best-known alternative chemistry in this space — but Fosroc’s current Indian construction-chemicals range does not field a direct rail-ballast-bonding resin, so for this specific application MC-Bauchemie’s Ballastbond family remains the practical specification route through Space Arc. For adjacent rail and civil infrastructure scope on the same project — expansion joints, structural grouts, waterproofing or concrete repair — Space Arc’s broader MC-Bauchemie and Fosroc portfolios cover the rest of the work.”}

The technical insight

The chemistry is worth understanding before specifying it. MC-Ballastbond 70 sits in the low-viscosity band of MC-Bauchemie’s ballast-bonding range (200 ± 50 mPa·s at 21°C), which is what lets it wet out and coat individual ballast stones rather than pooling at a few contact points — a higher-viscosity resin would bond fewer stone-to-stone contacts per litre applied. The mild foaming reaction on contact with moisture is deliberate: it’s tuned to be limited enough that it doesn’t seal off the void network the ballast needs for drainage, unlike a fully-foamed rigid system that would start behaving like a slab. MC-Bauchemie’s own range makes this trade-off explicit across three grades — MC-Ballastbond 60 is the more sprayable, faster-reacting variant for lighter surface consolidation; MC-Ballastbond 70 (this product) is the general-purpose PU duromer for structural ballast reinforcement; and MC-Ballastbond 80, the grade actually listed on MC-Bauchemie’s India site, is an organo-mineral-based resin pitched at soil and fissure grouting and drinking-water-adjacent work. Choosing between them is a specification decision, not a stocking decision, which is why we always confirm the exact grade against the project’s technical documents before placing an order.

Where it is used

• Ballast reinforcement at points, crossings and curves on railway and metro corridors carrying high or differential axle loads
• Stabilising ballast shoulders and toe zones during track renewal, doubling or gauge-conversion works
• Consolidating ballast at level-crossing approaches subject to mixed road-rail traffic churn
• Bonding loose ballast or gravel in stabling yards, depot aprons and siding turnouts to raise load capacity
• Protective bonding of ballast shoulders ahead of monsoon-season traffic to resist washout and migration
• Consolidating loose split, rock or gravel surfacing where load capacity, colour retention or weed suppression is required
• Selective, localised ballast stabilisation as an alternative to full ballast renewal on time- or budget-constrained possessions
• Bonding loose rock and talus adjoining rail formation in hill or cutting sections prone to positional instability

Key advantages

• Bonds ballast stone-to-stone without materially blocking drainage, unlike solutions that seal ballast into an impermeable mass
• Short reaction and application time (around 10 minutes) shortens the traffic-block or possession window needed per section
• Tough-elastic rather than rigid bond absorbs cyclic wheel loading instead of turning ballast into a brittle slab
• Sprayed onto the ballast surface rather than injected into the subgrade, so track geometry and profile stay undisturbed
• Reactivity is field-tunable with the MC-KAT 27 accelerator to suit ambient temperature and site conditions
• Flame-resistant resin formulation, relevant for work carried out near live electrified track and signalling assets
• REACH-assessed for periodic water-contact exposure scenarios, a realistic condition for monsoon-exposed Indian ballast beds
• Can reduce the frequency of tamping and ballast top-up cycles at chronic problem locations, lowering repeat maintenance spend

Limitations & considerations

• Needs a calibrated two-component injection pump and static mixer on site — it is not a hand-mixed, trowel-applied product
• Application must stop below 5°C or above roughly 40–45°C substrate/material temperature, in rain, or on wet gravel, narrowing the usable window in peak summer and monsoon
• Requires trained applicator crews for correct mixing ratio, spray distance and fan pattern; Space Arc supplies it as a supervised application, not an over-the-counter material
• Consolidates the ballast layer itself — it does not correct formation-level drainage faults or subgrade and subballast failures, which need separate rectification
• Bulk pack sizes (1000 l container down to 20 l canisters) suit corridor-scale works and are uneconomical for very small patch repairs
• Cleaning is solvent-based only (MC-Verdünnung PU) — water and water-based cleaners must never be used, so site housekeeping and PPE discipline are non-negotiable

Selection & best practice

Specifications

Industry use cases

How we position MC-Bauchemie MC-Ballastbond 70

MC-Ballastbond 70 sits within MC-Bauchemie’s small, purpose-built ballast-bonding family: MC-Ballastbond 60 is the faster, more sprayable variant for lighter surface consolidation, MC-Ballastbond 80 is the organo-mineral grade that MC-Bauchemie’s own India catalogue lists for soil and fissure grouting and drinking-water-adjacent work, and both pair with the MC-KAT 27 accelerator and MC-I 700 injection pump for site application. Globally, polyurethane ballast-stabilisation resins are a niche a handful of European specialists compete in — BASF’s Elastocoast system is the best-known alternative chemistry in this space — but Fosroc’s current Indian construction-chemicals range does not field a direct rail-ballast-bonding resin, so for this specific application MC-Bauchemie’s Ballastbond family remains the practical specification route through Space Arc. For adjacent rail and civil infrastructure scope on the same project — expansion joints, structural grouts, waterproofing or concrete repair — Space Arc’s broader MC-Bauchemie and Fosroc portfolios cover the rest of the work.

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