Concrete modifying agent containing lignin

Abstract

The invention discloses a concrete modifying agent containing lignin. The concrete modifying agent is prepared from the following raw materials in parts by weight: 2.5-5 parts of periodate lignin, 1.2-1.8 parts of melamine, 1.5-2.8 parts of tributyl citrate, 0.8-1.5 parts of dehydrated acetic acid, 2.3-2.8 parts of aminoalcohol, 5-10 parts of aluminum phosphate trihydrate, 1.5-2.6 parts of tribenzyl phenol polyoxyethylene ether and 0.5-1.1 parts of p-tert-pentylphenol. Compared with the existing concrete modifying agents, the concrete modifying agent has the advantages that the surface toughness is high, the brittleness is low, and the low-temperature stability of concrete is improved; by using the concrete modifying agent, the coefficient of heat conductivity of the concrete is lowered, the heat absorption value is reduced, the heat / cold resistance value is increased, the temperature sensibility is lowered, the high / low-temperature stability of asphalt concrete becomes better, the crack resistance of a concrete paved pavement is improved, the service life of the paved pavement is prolonged, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to a concrete modifier containing lignin, which belongs to the field of building materials. Background technique [0002] In recent years, the asphalt road business has developed rapidly, but there are generally problems in technology and quality of asphalt pavement, which are mainly reflected in the durability of road engineering and the early damage of the road surface, especially in some bad weather conditions and heavy traffic loads. Therefore, higher requirements are placed on the performance of asphalt concrete. Usually, asphalt concrete is obtained by compacting the homogeneous mixture of heated asphalt, coarse and fine aggregates and filling materials (mineral powder, cement, etc.) according to the appropriate mixing ratio. Generally, the temperature stability of asphalt concrete is the main factor affecting the durability of the road, and the water stability of asphalt concrete is the main factor affecting the early fail...

AI Technical Summary

Problems solved by technology

Generally, the temperature stability of asphalt concrete is the main factor affecting the durability of the road, and the water stability of asphalt concrete is the main factor affecting the early failure of the asphalt pavement. A large number of cracks, pits, spalling, aggregate shedding, and even structural damage, which has to be repaired or maintained, resulting in a great waste of resources and economic losses