Introduction Bitumen MC-70
Cutback Bitumen MC-70 is a medium-curing (MC) cut-back asphalt, consisting of penetration grade asphalt cement and a medium volatility diluent. Interestingly, the diluent temporarily reduces the viscosity of the asphalt cement, thus allowing easier handling and application. After application, the diluent evaporates, leaving asphalt cement to perform its function. Notably, Cutback MC-70 is commonly used in roofing as a waterproofing membrane and as an adhesive to stick chippings onto flat, horizontal roofs to minimize the effects of weathering from the sun.
Composition
Cutback Bitumen MC-70 is formed by dissolving bitumen in solvents like kerosene. Consequently, kerosene and other volatile petroleum-derived products reduce the viscosity of the bitumen. This reduction aids in constructing seal coats in road pavements since the softened mixture wets the chips more easily. Eventually, the cutback agent evaporates from the seal coat, thereby leaving behind a durable asphalt layer. However, if significant amounts of the cutback agent remain, it may result in unwanted long-term softening effects.
Standards
Our MC-70 Cutback Bitumen complies with ASTM D2028-97 standards, reapproved in 2004. Furthermore, it is suitable for both pavement construction and treatment. Additionally, this cutback grade bitumen blends with solvents such as kerosene, white spirit, gasoline, and naphtha, which effectively control the curing time. Therefore, Gold Bitumen Co. ensures top performance and durability.
Uses of Cutback Bitumen MC-70
Priming and Coating
Cutback agents lower the viscosity of bitumen when applied as a primer to road pavement aggregate base courses or substrates. Specifically, kerosene adjusts the concentration based on project requirements. Moreover, the cutback bitumen is ideal for prime coats and cold applications, as it is easy to use without thinning or heating.
Waterproofing
The cutback asphalt MC-70 waterproofs surfaces, plugs capillary voids, and bonds loose mineral particles. As a result, it significantly improves surface durability while preventing water damage over time.
Mixing Applications
Additionally, Cutback Bitumen MC-70 is useful in penetrating prime coats and producing patching or stockpile mixtures. In fact, adhesion agents assist in better coating of the aggregate surface, ensuring long-lasting repairs and structural integrity.
Packing of Cutback Bitumen MC-70
This cutback bitumen is available in bulk tankers and new, thick steel drums secured on pallets to prevent leaks during transport and storage. Consequently, this packaging ensures product integrity and ease of handling.
Safety of Cutback Bitumen MC-70
Precautions
Refer to Safety Data Sheets before use. Moreover, transport, use, and store the product at the lowest temperature possible to reduce risks. Eliminate all ignition sources during application. Always wear proper PPE, especially when the product is hot, and avoid inhaling vapors or allowing skin contact.
Environmental Safety
Prevent the product and its washings from entering stormwater or sewer systems. This practice reduces environmental risks and, in turn, contributes to sustainable management.
Guarantee/Warranty of Cutback MC-70
Gold Bitumen Co. guarantees the quality of Cutback MC-70 through international inspections and strict quality control tests. Importantly, each batch undergoes thorough checks to meet ASTM/EN 15322:2009 standards, ensuring consistent performance and customer satisfaction.
Analysis and Specification of Bitumen MC-70
| Property | Min | Max | Test Method |
|---|---|---|---|
| Kinematic Viscosity at 60°C (cSt) | 70 | 140 | ASTM D2170 |
| Flash Point (Tag Open-Cup), °C | 38 | – | ASTM D1310 |
| Distillate Test | – | – | ASTM D402 |
| Residue from Distillation to 360°C | – | – | ASTM D95 |
| Penetration at 25°C, 100g, 5 sec. | 120 | 300 | ASTM D5 |
| Ductility at 25°C (cm) | 100 | – | ASTM D113 |
| Solubility in Trichloroethylene (%) | 99 | – | ASTM D2042 |
| Water Content (% Volume) | – | 0.2 | ASTM D95 |
FAQ
Frequently asked questions from buyers about Bitumen MC-70:
Q1: What are the main applications of Bitumen MC-70?
A1: MC-70 is mainly used for prime coats, spray sealing, and pavement construction where controlled curing and deeper penetration are required.
Q2: What is the minimum order quantity (MOQ)?
A2: MOQ typically starts from 100 MT (≈ 500 drums). Trial shipments can also be arranged in jumbo bags or bulk tankers depending on buyer request.
Q3: What packaging options are available?
A3: Bitumen MC-70 is supplied in 200 L new steel drums, 25 kg pails, jumbo bags, or in bulk via tankers/bitutainers. Packaging is SGS approved and export compliant.
Q4: Do you provide certificates and quality assurance?
A4: Yes. Each shipment includes COA, MSDS, ASTM compliance. Third-party inspections (SGS, BV, GeoChem) can be arranged before shipment if required.
Q5: What are the delivery and payment terms?
A5: Standard delivery is within 7–14 days after order confirmation. Payment options include TT (Telegraphic Transfer) and LC (Letter of Credit), negotiable for bulk contracts.