Abstract: The present invention provides a method of calculating the dosage of phase change coarse aggregate, which comprises the steps of setting a regulatory temperature difference of a thermoregulating cement-stabilized layer, the regulatory temperature difference being the difference between the peak temperature of the thermoregulating cement-stabilized layer and the peak temperature of a conventional cement-stabilized layer, wherein the thermoregulating cement-stabilized layer is mixed with a phase change coarse aggregate, while the conventional cement-stabilized layer is not mixed with a phase change coarse aggregate; calculating a regulatory heat based on the regulatory temperature difference, wherein when a temperature change of the conventional cement-stabilized layer is the regulatory temperature difference, a heat change of the conventional cement-stabilized layer is the regulatory heat; and calculating a volume occupied by the phase change coarse aggregate in the thermoregulating cement-stabilized layer bas

Abstract: The present disclosure provides a method for testing frost susceptibility of soils and an associated apparatus, and relates to the field of testing technology. The method includes: taking a part of a soil sample to be tested as test soil sample and freezing the test soil sample; taking a soil sample of outer layer from the test soil sample after the completion of freezing and measuring the moisture ratio of the soil sample of outer layer; and determining the frost susceptibility of the soil sample to be tested based on an initial moisture ratio and the moisture ratio of the soil sample of outer layer or based on the moisture ratio of the soil sample of outer layer and the moisture ratio of a soil sample of inner layer from the test soil sample after the completion of freezing, frost susceptibility.

Abstract: A composite embankment structure includes an embankment, an airflow-enhanced embankment ventilation structure, and a heat pipe system. The embankment includes an embankment filler layer, a ventilation slab lower leveling layer, a ventilation slab upper cushion, and a pavement structure layer arranged in sequence from bottom to top. The ventilation slab in the airflow-enhanced embankment ventilation structure is arranged between the ventilation slab lower leveling layer and the ventilation slab upper cushion. The heat pipe system includes a heat pipe, and one end of the heat pipe is inserted into the embankment from an embankment slope and is located under the ventilation slab.

Abstract: The present disclosure provides a method for testing frost susceptibility of soils and an associated apparatus, and relates to the field of testing technology. The method includes: taking a part of a soil sample to be tested as test soil sample and freezing the test soil sample; taking a soil sample of outer layer from the test soil sample after the completion of freezing and measuring the moisture ratio of the soil sample of outer layer; and determining the frost susceptibility of the soil sample to be tested based on an initial moisture ratio and the moisture ratio of the soil sample of outer layer or based on the moisture ratio of the soil sample of outer layer and the moisture ratio of a soil sample of inner layer from the test soil sample after the completion of freezing.