Pavement joint sealing material

Abstract

The invention discloses a pavement joint sealing material. The pavement joint sealing material contains the following components in parts by weight: 60-80 parts of polyvinyl alcohol resin, 40-50 parts of cellulose nanocrystallines, 10-18 parts of phytosterol, 5-10 parts of sodium potassium silicate, 2-10 parts of raw gypsum, 1-6 parts of bisphenol C, 10-20 parts of calcium stearate, 1-6 parts of stearamide, 2-8 parts of polyvinyl alcohol, 6-10 parts of xylene, 1-5 parts of hollow glass beads and 3-10 parts of cryolite. By virtue of a synergistic effect of the components, the ultraviolet resistance of the joint sealing material is enhanced, the weather resistance is enhanced, the aging resistance is enhanced, the service life of the joint sealing material is effectively prolonged to be 20 years or above, and the probability that bubbles and cracks are formed in a high-humidity environment can be effectively reduced; the pavement joint sealing material further has elasticity, caking property and durability, can resist stretching, compression and vibration for a long time, has a strong cohesive force, is not damaged by thermal expansion, cold contraction and repeated stretching and compression at a joint and is convenient to construct; and by applying the pavement joint sealing material to a cement concrete pavement, the quality of the cement concrete pavement is improved, and meanwhile, the service life of the cement concrete pavement is effectively prolonged.

Description

technical field [0001] The invention relates to a joint filling material, in particular to a road surface joint filling material. Background technique [0002] With the rapid increase of road mileage and road density, the road maintenance problems faced by the road maintenance department are becoming more and more serious. Many national roads, provincial roads and expressways in the country have different degrees of road surface diseases, especially cracks. Cracks not only destroy the structural integrity of roads , while also reducing the comfort and safety of the road. Whether it is cement concrete pavement or asphalt pavement, due to the inherent characteristics of materials, construction process, natural environment and other factors, the appearance of cracks cannot be avoided. In the initial stage of cracks (1-2 years), cracks have no obvious impact on the performance of the pavement. Under the comprehensive action of traffic load and natural environment, the cracks g...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a kind of pavement joint filler, make it under the situation that it has higher adhesiveness, excellent elasticity and ductility, good high and low temperature performance, have certain toughness, can At the same time, it has good weather resistance, so that it can be heated for a long time, avoid aging due to ultraviolet radiation, enhance anti-aging performance, and prolong its service life; solve the problem that air bubbles and cracks are not easy to occur in high-humidity environments, and can meet the requirements of cement concrete Requirements for long-term use of pavement joint filling materials