One-step forming construction method for expressway high-modulus asphalt composite

Abstract

The invention provides a one-step forming construction method for an expressway high-modulus asphalt composite (HMAC, namely the EME), and relates to the technical field of highway pavement construction and design. According to the method, in the mixing, transportation and paving procedures of the high modulus asphalt composite, the composite is controlled at a preference temperature, wherein the temperature during stirring is 160-180 DEG C; each disc of the composite is mixed for 54-60 s; a provided asphalt transferring trolley of a continuous feeding device moves before a paver to be tightly connected with the paver, and the temperature of the asphalt composite is not smaller than 140 DEG C; in the paving procedure, semi-range, overall-width and one-time paving is realized by the paver, and the paver is guided by stranded wires or controlled by a double-levelling beam with the length of 14 m; the one-time paved asphalt composite is 14-15 cm in thickness, the vibration frequency of a rammer of the paver is about 1400-1600 rev / min, the vibration frequency of a tamping plate of the paver is about 1900-2200 rev / min, and the walking speed of the paver during construction is not greater than 1.5 m / min. The method overcomes defects that in the traditional EME construction, roller compaction is difficult due to the loss of the temperature of a base layer, the asphalt composite is difficult to compact, and regulatory requirements cannot be met due to poor adhesion between the layers of the asphaltic composite.

Description

technical field [0001] The invention relates to the technical field of highway pavement construction and design, in particular to a one-time forming construction method of highway high modulus asphalt mixture. Background technique [0002] The construction method of highway high modulus asphalt mixture (English abbreviation HMAC, French abbreviation EME), especially the EME construction method following the French norms and Moroccan norms, that is, the construction method in which each structural layer of EME is the pavement base, tie layer, and surface layer . Traditional EME construction generally adopts layered construction of 7cm+7cm, or 5cm+5cm+4cm. The comparative study of domestic and foreign literature shows that in the construction of high modulus asphalt mixture EME, the structure of 4+5+5 combined with a total thickness of 14cm is better; in France, the thickness of the high modulus EME layer is 7- 12cm, 10-15cm; although China Railway 17th Bureau has carried ou...

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Problems solved by technology

[0003] The purpose of the present invention is to disclose a construction method of expressway high modulus asphalt mixture, in order to overcome the traditional EME construction of asphalt mixture, the temperature loss of the base layer is not easy to roll, the asphalt mixture is not easy to compact, and the gap between the two layers Defects due to poor adhesion and failure to meet specification requirements

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