Asphalt haulage is the most time-critical duty in road construction. Hot mix arrives at roughly 150–170 °C, must be placed within a defined temperature window, and cannot wait. That means the haulage fleet is planned against a clock rather than against tonnage — and it also means the fleet spends a great deal of its shift stationary, queuing at the plant or holding behind the paver. The Dongfeng KTA1 electric dump truck — CATL 352 kWh LFP, LvKong 270 kW rated / 450 kW peak with a 4-speed AMT — is well matched to it, because the electric drivetrain removes the fuel cost of all that waiting. This article covers the temperature discipline, the timing maths, the body specification and the operational rules.
| Stage | Typical temperature | Constraint |
|---|---|---|
| At plant discharge | 150–170 °C | Set by mix design |
| Arrival at paver (minimum) | 130–145 °C depending on mix | Below this, compaction cannot be achieved |
| Compaction window | Above ~110 °C | Roller pattern must complete before the mat cools |
| Cooling rate in transit | 1.5–4 °C per 10 minutes | Driven by ambient, wind, body insulation and load mass |
From that table comes the operational rule that defines the whole plan: haul time, not haul distance, is the constraint. A 12 km haul in free-flowing traffic may be fine; the same 12 km through congestion is not.
Plan the cycle in minutes, then check it against the temperature budget:
With a temperature budget of, say, 20–35 °C of allowable loss and a cooling rate of 2–3 °C per 10 minutes, the loaded leg plus hold must fit inside roughly 70–110 minutes. Everything else in the plan follows from that.
Hot mix damages bodies that were specified for spoil. Four requirements:
Full body options are set out in our electric tipper body specification guide.
The number of trucks is set by the paver's output, not by tonnage targets:
| Parameter | Worked example |
|---|---|
| Paver output | 250 t/hour |
| Payload per truck | 22 t |
| Trucks required per hour | 11.4 |
| Cycle time | 55 minutes |
| Trucks required (output × cycle ÷ payload) | 250 × 0.92 ÷ 22 ≈ 10.5 → 11 trucks |
| Buffer for delays | +2 trucks |
| Fleet | 13 KTA1 units |
Under-sizing the fleet is the classic paving failure: the paver stops, the mat cools, and a joint is created that will crack. Electric trucks do not change this arithmetic, but they do make the buffer cheaper to run, because waiting trucks consume almost nothing.
Paving duty is moderate distance with long idle periods:
Winter paving adds a further consideration: cold ambient increases cooling rate of the mix and reduces pack efficiency. Pre-condition the cab and, where possible, charge during warmer parts of the day. See winter preparation for electric trucks.
Night paving is common on urban roads and highways, precisely because it minimises traffic disruption — and it is where an electric fleet has a structural advantage beyond cost:
Our night operations guide covers lighting, crew welfare and charging alignment for night work.
East African road construction combines long haul distances from plant to site, high ambient temperatures and growing urban paving work — conditions where insulated bodies and a thermally-specified truck matter. Our Kenya market page covers import, deployment and support for Kenyan contractors. Related: Nairobi fleet deployment, Mombasa port corridor and East Africa market analysis.
KTA1 FOB pricing typically falls in the USD 90,000–125,000 band depending on body and specification, with the CATL pack warranted 8 years / 4,500 cycles to 80% state of health.
The haulage fleet and the paving train are one production system, and most asphalt problems attributed to haulage are actually interface problems. Four practices prevent them:
An electric fleet changes one thing here: waiting costs almost nothing in energy, so the temptation is to run a larger buffer. Resist it — the concrete-equivalent constraint is temperature, not fuel, and a larger buffer simply means more mix cooling in more trucks.
Ready to electrify your fleet? Contact Shaanxi Fenghan Trading — authorized Dongfeng EV truck exporter. WhatsApp: +86 153 1943 1311 | Email: sales@fenghan-trade.com | dongfengevtrucks.com
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