Aging-resistant caulking filling material and preparation method thereof

Abstract

The invention provides an aging-resistant caulking filling material and a preparation method thereof. The caulking filling material comprises the following components: 100 parts of petroleum asphalt, 5-20 parts of aromatic-hydrocarbon-enriched extract oil, 3-20 parts of styrene-butadiene-styrene block polymer (SBS), 1-8 parts of ethylene bis stearamide (EBS), 0.3-1.5 parts of antioxidant 168, 1-5 parts of light screening agent and 0.1-0.3 part of crosslinking agent. The preparation method comprises the following steps: heating to melt the asphalt, adding the extract oil, SBS, EBS and antioxidant, shearing, uniformly mixing, and then adding the crosslinking agent and light screening agent. The caulking filling material provided by the invention has better high/low temperature property and low crack pouring construction temperature; and above all, the antioxidant and light screening agent are introduced, so that the aging speed of the caulking asphalt material is reduced, the aging resistance of the bridge floor caulking material is obviously improved, and the service life of the bridge floor is prolonged. Thus, the invention can be used for the paving and repairing of expansion joints and cracks on the bridge floor.

Description

technical field [0001] The invention relates to an anti-aging caulking filling material and a preparation method thereof. The caulking filling material can be used for paving and repairing expansion joints and cracks on bridge pavement. Background technique [0002] The bridge expansion joint is an important part of the bridge structure, and the performance of the bridge expansion joint directly affects the service life of the bridge and the driving comfort. Filled bridge expansion joints are a new type of bridge expansion joints. Its main working mechanism is to rely on the elasticity of the mixture of high-elastic special asphalt binder and stone to adapt to the displacement of the bridge end due to temperature and traffic loads. At the same time, because it has many advantages such as simple construction, low cost, comfortable driving, long service life, and half-width construction without interrupting traffic, it is favored by scientific researchers from all over the wor...

AI Technical Summary

Problems solved by technology

The disadvantage of this filler is that the addition of styrene-butadiene-styrene block copolymer (SBS) is relatively high, the product viscosity is relatively high, and the construction of joints is relatively high; and the modifier styrene-butadiene- Styrene block copolymer (SBS) contains a certain amount of C=C double bonds, which is easy to age and degrade under the action of oxygen and ultraviolet rays, and the joint filling material has poor aging resistance, which affects the service life of the bridge deck