Stationary Asphalt Mixing Plant
LB Stationary Asphalt Mixing Plant
A Stationary Compulsory Batch Asphalt Mixing Plant (commonly referred to as an Asphalt Batch Mix Plant or Tower-Type Asphalt Mixing Plant) is a high-precision, heavy-duty industrial facility engineered for the continuous, high-volume production of premium-grade hot mix asphalt (HMA). It prepares asphalt mixtures in discrete, tightly controlled batches through a sequential process of drying, screening, precision weighing, and compulsory twin-shaft pugmill mixing.
Capacity available: 60t/h to 320t/h
Mixer: Twinshaft mixer
Control system : PLC Auto
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PRODUCT DESCRIPTION
Henan Shengmao Machinery Co., Ltd. (Shengmao Machinery) is a specialized manufacturer of high-end road construction and concrete machinery. Shengmao’s LB Series Stationary Compulsory Batch Asphalt Mixing Plants (ranging from 40 t/h to 320+ t/h) represent high-efficiency asphalt batching technology designed to meet the world’s most stringent pavement specifications (including ASTM, EN, and AASHTO standards).
Engineered with advanced thermal combustion efficiency, microcomputer PLC batching precision, and eco-friendly pulse-jet filtration, Shengmao LB plants deliver maximum operational uptime, fuel economy, and exceptional pavement durability for international contractors and commercial asphalt suppliers.
Core Working Principle & Characteristics:
Precision Aggregate Drying & Heating: Raw cold aggregates are metered from multi-bin feeders and conveyed into a counter-flow rotary drying drum to remove all moisture and reach mixing temperature (140∘C−180∘C).
Multi-Deck Hot Screening: Dried aggregates are lifted by a vertical bucket elevator into a vibrating screen tower, where they are classified into 4 to 6 separate hot storage bins according to exact particle sizes.
Independent Precision Batch Weighing: Aggregates, mineral filler, and heated liquid bitumen are independently weighed in separate electronic scale hoppers to achieve strict recipe accuracy (±0.5%−±1%).
Compulsory Twin-Shaft Mixing: The weighed constituents are dropped into a heavy-duty twin-shaft pugmill mixer, where synchronized counter-rotating shafts with wear-resistant alloy paddles thoroughly coat all aggregates within a fast 40–50 second batch cycle.
Key Applications: Widely utilized in high-grade national highways, expressways, airport runways, municipal main roads, and centralized commercial asphalt batching terminals.
PARAMETERS
Batch type
| Model | LB700 | LB1000 | LB1200 | LB1500 | LB2000 | LB2500 | LB3000 | LB4000 |
| Production Capacity (T/h) | 60 | 80 | 100 | 120 | 160 | 200 | 240 | 320 |
| Mixer Capacity (kg) | 700 | 1000 | 1200 | 1500 | 2000 | 2500 | 3000 | 4000 |
| Cycle time (s) | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 |
| Dust Remove Effect (mg/Nm³) | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 |
| Fuel Consumption (kg/t) (Oil) | 5.5-7 | 5.5-7 | 5.5-7 | 5.5-7 | 5.5-7 | 5.5-7 | 5.5-7 | 5.5-7 |
| Fuel Consumption (kg/t) (Coal) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Aggregate Weighing Accuracy (%) | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 |
| Filler Weighing Accuracy (%) | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 |
| Bitumen Weighing Accuracy (%) | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 | ±0.25 |
CORE PARAMETERS
Capacity available: 60t/h to 320t/h
Mixer: Twin shaft mixer
Control system : PLC Auto
CORE SELLING POINT
Uncompromising Dosing Accuracy & Formula Compliance
Independent High-Precision Load Cells: Dedicated electronic scale hoppers for hot aggregates (±0.5%), mineral filler (±1.0%), and liquid bitumen (±0.5%). Full Recipe Compliance: Meets the strictest international highway engineering standards (ASTM, EN, and AASHTO), eliminating pavement rutting and asphalt bleeding.
Heavy-Duty Twin-Shaft Compulsory Pugmill Mixer
Fast & Homogeneous Mixing: Synchronized counter-rotating dual shafts with high-chromium wear-resistant alloy paddles (hardness ≥60 HRC) complete thorough aggregate coating in just 40 to 45 seconds per batch. Specialized Mix Capability: Fully capable of mixing Hot Mix Asphalt (HMA), Stone Mastic Asphalt (SMA), Superpave, and Polymer-Modified Bitumen (PMB).
High-Efficiency Multi-Deck Hot Aggregate Screening
Precise Size Classification: Multi-deck linear vibrating screen driven by dual unbalance exciters classifies dried hot aggregates into 4 to 6 separate hot storage bins, eliminating off-spec particles.
Multi-Fuel Thermal Efficiency & Energy Savings
Versatile Combustion Options: Low-NOx burners compatible with Light Diesel, Heavy Oil, Natural Gas / LNG, Pulverized Coal, or Dual-Fuel configurations. Low Fuel Consumption: Thermal insulation on the drying drum with optimized internal flight geometry cuts fuel consumption to approx. 5.5−7.0 kg/t (diesel/heavy oil) or 10 kg/t (coal).
Eco-Friendly Pulse-Jet Nomex Baghouse Filtration
Strict Environmental Compliance: Two-stage filtration (gravity settling/cyclone + secondary Nomex pulse baghouse) captures >99.8% of airborne particulates, keeping emissions ≤20 mg/Nm3. Closed-Loop Filler Recovery: Reclaims fine mineral dust and recycles it automatically back into the batching cycle to minimize raw material waste.
Intelligent Industrial PLC Control & Global Turnkey Support
Dual Control Architecture: Fully computerized automated control cabin with dynamic visual mimic flow diagrams, unlimited recipe storage, auto free-fall compensation, and emergency manual backup. Global Support: Complete site layout CAD design, foundation drawings, overseas erection supervision, operator training, and lifetime spare parts backup.
RECOMMENDED USAGE SCENARIOS
National Expressways, Toll Highways & Intercity Arterials
Project Scope: High-speed, heavy-traffic intercity highway corridors requiring premium pavement durability, high rutting resistance, and extended service life.
Why Shengmao LB Fits: Multi-deck vibrating screens and high-precision electronic load cells ensure strict aggregate gradation and exact binder ratios for high-specification HMA, SMA, and Superpave mixtures.
Recommended Models: LB2000, LB2500, LB3000, LB4000 (160 – 320+ t/h).
International Airport Runways, Taxiways & Heavy Aprons
Project Scope: Airfield pavements subjected to immense dynamic wheel loads, high tire pressures, jet blast temperatures, and strict friction standards.
Why Shengmao LB Fits: The heavy-duty twin-shaft compulsory pugmill ensures homogeneous distribution of high-viscosity polymer-modified bitumen (PMB). Computerized PLC batching logs every single batch to comply with international aviation paving standards (FAA / ICAO).
Recommended Models: LB2000, LB3000, LB4000 (160 – 320+ t/h).
Centralized Commercial Ready-Mix Asphalt Supply Hubs
Project Scope: Commercial asphalt batching terminals supplying hot mix asphalt to multiple paving contractors and government projects across a metropolitan region.
Why Shengmao LB Fits: Industrial PLC system stores unlimited recipes with automated ticketing and customer billing data. Optional large insulated hot storage silos (100–300+ tons) allow non-stop batching and rapid truck dispatch during peak morning paving hours.
Recommended Models: LB2000, LB3000, LB4000 (160 – 320+ t/h).
Municipal Main Arterials, City Ring Roads & Elevated Flyovers
Project Scope: High-traffic city main roads, elevated highway bridges, bus rapid transit (BRT) lanes, and urban renewal paving in dense metropolitan areas.
Why Shengmao LB Fits: Pulse-jet Nomex baghouse filtration achieves ultra-low dust emissions (≤20 mg/Nm3≤20 mg/Nm3) to meet strict urban environmental regulations, while the computerized cabin enables fast one-click recipe switching between surface, binder, and base courses.
Recommended Models: LB1000, LB1200, LB1500, LB2000 (80 – 160 t/h).
Provincial Highways, Trunk Roads & Highway Widening Projects
Project Scope: Regional primary/secondary highways, intercity connecting corridors, bypasses, and roadway widening contracts.
Why Shengmao LB Fits: Delivers a reliable balance of steady medium-to-high capacity, high fuel efficiency, and consistent formula quality for medium-scale road contractors.
Recommended Models: LB1000, LB1200, LB1500 (80 – 120 t/h).
Municipal Road Repairs, County Roads & Industrial Parks
Project Scope: County road modernization, township road hardening, industrial park infrastructure, and localized municipal road resurfacing.
Why Shengmao LB Fits: Compact footprint, lower connected electrical power (~110–145 kW), and cost-effective batching for localized road construction teams.
Recommended Models: LB500, LB700 / LB750 (40 – 60 t/h).
Heavy-Duty Port Quays, Container Yards & Logistics Terminals
Project Scope: Industrial pavements, container freight terminals, and logistics parks subjected to slow-moving, concentrated heavy axle loads.
Why Shengmao LB Fits: Accurately batches high-modulus, rut-resistant asphalt layers capable of withstanding heavy container reach-stackers and freight truck traffic.
Recommended Models: LB1500, LB2000 (120 – 160 t/h).
FAQ
Q1:What is the primary difference between Shengmao LB Series (Batch Mix) and DHB Series (Drum Mix) plants?
A1:
A: LB Series (Batch Mix): Feeds aggregates through a multi-deck screen, weighs each constituent (aggregate, filler, bitumen) independently in batches, and mixes them in a twin-shaft pugmill. It is required for high-specification projects (expressways, airports) requiring strict grading and specialized formulas (SMA/PMB).
DHB Series (Continuous Drum Mix): Dries, heats, and mixes continuous materials inside a single rotating drum without screening or a separate pugmill. It offers 30%–50% lower capital investment (CapEx) and 25%–40% lower power consumption, ideal for rural road hardening and base-layer paving.
Q2:What is the capacity range available in the LB Series?
A2:
A: Shengmao LB Series covers 9 standard capacities:
LB500: 40 t/h (500 kg/batch)
LB700 / LB750: 50–60 t/h (700–750 kg/batch)
LB1000: 80 t/h (1,000 kg/batch)
LB1200: 100 t/h (1,200 kg/batch)
LB1500: 120 t/h (1,500 kg/batch)
LB2000: 160 t/h (2,000 kg/batch)
LB2500: 200 t/h (2,500 kg/batch)
LB3000: 240 t/h (3,000 kg/batch)
LB4000: 320+ t/h (4,000 kg/batch)
Q3:What are the weighing accuracy standards of Shengmao LB plants?
A3:
A: Each batch is weighed independently using high-precision digital load cells:
Hot Aggregates: ±0.5% accuracy
Liquid Bitumen: ±0.5% accuracy (with dynamic temperature compensation)
Mineral Filler Powder: ±1.0% accuracy
Q4:Can Shengmao LB asphalt plants produce Stone Mastic Asphalt (SMA) and Polymer-Modified Bitumen (PMB)?
A4:
A: Yes. The heavy-duty twin-shaft compulsory pugmill with high-chromium alloy liners easily handles high-viscosity PMB binders. Separate automated feeding systems can be integrated for cellulose fibers, anti-stripping agents, and color pigments.
Q5:What burner fuels are supported, and what is the typical consumption?
A5:
A: Burners support Light Diesel, Heavy Oil, Natural Gas / LNG, Pulverized Coal, and Dual-Fuel.
Diesel / Heavy Oil: Approx. 5.5−7.0 kg/t finished mix.
Pulverized Coal: Approx. 10 kg/t finished mix. (Varies based on aggregate moisture content and ambient temperature).
Q6:How does the plant ensure environmental compliance in urban and sensitive areas?
A6:
A: The plant features a dual-stage dust collection system: a primary gravity/cyclone collector followed by an insulated pulse-jet Nomex filter baghouse, achieving filtration efficiency ≥99.8% and dust emission concentration ≤20 mg/Nm3, fully meeting international environmental regulations.
Q7:What auxiliary equipment is required on-site to operate an LB plant?
A7:
A: A complete operational facility typically requires:
Wheel Loader (3.0–5.0 Ton): For charging cold aggregate bins.
Bitumen Storage & Heating Tanks (30T–100T): Direct-fired or thermal oil heated.
Mineral Filler Silo & Screw Conveyors: For lime/stone powder storage.
Insulated Dump Trucks: To transport hot mix asphalt to the road paver.
Power Supply: Industrial 3-phase electric grid or heavy-duty diesel generator set.
Q8:How long does overseas installation and commissioning take?
A8:
A: Mechanical erection, electrical cabling, sensor calibration, and trial mixing typically take 20 to 30 days under the guidance of Shengmao’s overseas dispatch engineering team. Standard factory manufacturing lead time is 20 to 35 days.
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