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Thermal Stability of Cast-in-Place Asphalt Mixtures
Pouring-type asphalt mixture is a type of asphalt concrete classified according to its construction process. It features a suspended dense structure and is characterized by a high content of fine aggregates, a high proportion of mineral powder, and a relatively high asphalt content. Pouring-type asphalt concrete is impermeable, resistant to freeze-thaw cycles, oil-resistant, and age-resistant. It also exhibits excellent performance in resisting low-temperature cracking and fatigue cracking. Due to its higher asphalt content, pouring-type asphalt concrete is prone to rutting under high-temperature conditions. Because pouring-type asphalt mixtures differ significantly from conventional asphalt mixtures—being produced through prolonged high-temperature mixing of high-asphalt-content, high-viscosity asphalt and large quantities of mineral powder—the design process requires careful consideration.
2019-01-23
The Harm of Asphalt in Pouring-Type Asphalt Mixtures to Human Health
Acridine: Acridine is irritating to both skin and mucous membranes. Its dust particles and gases can easily trigger sneezing, and contact with the skin may cause itching and a burning sensation.
2019-01-23
Analyze the functional modules of the rotary compactor.
Sensors: These are categorized into pressure sensors, displacement sensors, angle sensors, limit switches, and others, which respectively collect data on pressure, displacement of the pushrod, rotation angle of the turntable, and whether the pushrod has exceeded its limit.
2019-01-23
Introduction to Pavement Maintenance for Cast-in-Place Asphalt Mixtures
Introduction to Pavement Maintenance for Cast-in-Place Asphalt Mixtures: Preventive maintenance refers to maintenance operations aimed at protecting the pavement, preventing further deterioration of existing distresses, slowing down the rate of decline in pavement performance, and ultimately extending the service life of the pavement. Preventive maintenance does not have the function of reinforcing the pavement; therefore, it should not be expected to improve the pavement’s strength or load-bearing capacity. Corrective maintenance refers to maintenance operations designed to repair localized damage or specific types of distress on the pavement—operations that have not yet affected the pavement as a whole. Pavement rehabilitation refers to situations where pavement damage has already spread across most of the pavement surface, resulting in comprehensive deterioration.
2019-01-23
Low-Temperature Resistance of Cast-in-Place Asphalt Mixtures
Cast-in-place asphalt mixture is a type of asphalt concrete classified according to its construction process. It is mixed at high temperatures and exhibits high fluidity when laid out, relying on its own flow to achieve dense compaction without the need for rolling. Because cast-in-place asphalt mixture differs from conventional asphalt mixtures, it contains a high proportion of asphalt with exceptionally high viscosity. This type of mixture demonstrates excellent low-temperature performance. I have conducted split tensile and low-temperature beam bending tests on cast-in-place mixtures as low as -35°C, and the results were significantly better than those obtained with conventional asphalt mixtures. Moreover, there is a tendency for the performance of cast-in-place mixtures to improve further as the temperature decreases.
2019-01-23