Seamless expansion joint material adopting lime powder modified asphalt mortar of seamless expansion joint material and preparation method thereof

Abstract

The invention discloses a seamless expansion joint material adopting lime powder modified asphalt mortar and a preparation method of the seamless expansion joint material. The seamless expansion joint material comprises the following raw materials in parts by weight: 622-753 parts of wide temperature range modified asphalt, 746-903 parts of lime powder and 7200 parts of aggregate. The components, the proportion and the preparation process of the seamless expansion joint material are designed, so that the seamless expansion joint material has good high-temperature rutting resistance and low-temperature bending resistance and can meet the requirements of deformation and load complex working conditions in high and low temperature environments; the seamless expansion joint material of the lime powder modified asphalt mortar is prepared in a pre-mixing and layered pouring mode, so that the mixture is of a suspension compact structure, the aggregate plays a role in a framework, the asphalt mortar plays roles in bonding and expansion deformation, the high-temperature deformation resistance and the low-temperature cracking resistance are excellent, and the seamless expansion joint material can be applied to bridge expansion joint structures with medium and small spans.

Description

technical field

[0001] The invention relates to the field of road building materials and engineering, in particular to a seamless expansion joint material and a preparation method thereof. Background technique

[0002] Bridge expansion joints are generally set between the bridge decks of two adjacent spans of the bridge or between the bridge girder end and the back wall of the abutment. Freely stretch and deform. There are a series of problems in the existing bridge expansion joint structure: vehicle jumping aggravates bridge damage, overloading aggravates settlement, water leakage and chlorine salt corrosion of bridge concrete materials, dust and garbage filling expansion joints, and increased replacement costs.

[0003] The seamless expansion joint can ensure the continuity of the bridge pavement, eliminate the jumping problem caused by the discontinuity of the existing expansion joint structure, and improve the integrity and durability of the structure. Its superior perf...

Examples

Embodiment 1

[0038] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 622 parts of wide temperature range modified asphalt, 746 parts of lime powder, and 7200 parts of aggregate.

[0039] The PG classification of the wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0040] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0041] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm3 , The water absorption rate is 0.6-0.8%.

[0042] In this embodiment, the preparati...

Embodiment 2

[0055] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 687 parts of wide temperature range modified asphalt, 825 parts of lime powder, and 7200 parts of aggregate.

[0056] The PG classification of wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0057] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0058] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm 3 , The water absorption rate is 0.6-0.8%.

[0059] In this embodiment, the preparation...

Embodiment 3

[0072] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 753 parts of wide temperature range modified asphalt, 903 parts of lime powder, and 7200 parts of aggregate.

[0073] The PG classification of wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0074] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0075] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm 3 , The water absorption rate is 0.6-0.8%.

[0076] In this embodiment, the preparation...

technical field

[0001] The invention relates to the field of road building materials and engineering, in particular to a seamless expansion joint material and a preparation method thereof. Background technique

[0002] Bridge expansion joints are generally set between the bridge decks of two adjacent spans of the bridge or between the bridge girder end and the back wall of the abutment. Freely stretch and deform. There are a series of problems in the existing bridge expansion joint structure: vehicle jumping aggravates bridge damage, overloading aggravates settlement, water leakage and chlorine salt corrosion of bridge concrete materials, dust and garbage filling expansion joints, and increased replacement costs.

[0003] The seamless expansion joint can ensure the continuity of the bridge pavement, eliminate the jumping problem caused by the discontinuity of the existing expansion joint structure, and improve the integrity and durability of the structure. Its superior perf...

Examples

Embodiment 1

[0038] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 622 parts of wide temperature range modified asphalt, 746 parts of lime powder, and 7200 parts of aggregate.

[0039] The PG classification of the wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0040] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0041] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm3 , The water absorption rate is 0.6-0.8%.

[0042] In this embodiment, the preparati...

Embodiment 2

[0055] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 687 parts of wide temperature range modified asphalt, 825 parts of lime powder, and 7200 parts of aggregate.

[0056] The PG classification of wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0057] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0058] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm 3 , The water absorption rate is 0.6-0.8%.

[0059] In this embodiment, the preparation...

Embodiment 3

[0072] A seamless expansion joint material using lime powder modified asphalt mortar, which is made of the following raw materials in the following mass proportions: 753 parts of wide temperature range modified asphalt, 903 parts of lime powder, and 7200 parts of aggregate.

[0073] The PG classification of wide temperature range modified asphalt is PG88-28, the penetration range at 25°C is 20-40, the softening point is not lower than 80°C, and the ductility at 25°C is not lower than 20cm.

[0074] Lime powder is calcareous lime powder, the content of CaO+MgO is not less than 90%, the content of MgO is not more than 5%, CO 2 The content is not more than 4%, SO 3 The content is not more than 2%, the particle size range is 800 mesh, and the 90μm sieve residue is not more than 7%.

[0075] The lithology of the aggregate is basalt, the particle size is 10-20mm, and the density is 2.5-3.0g / cm 3 , The water absorption rate is 0.6-0.8%.

[0076] In this embodiment, the preparation...

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