Anti-crack and anti-seepage steel slag pavement base mixture and preparation method thereof

Abstract

The invention relates to the technical field of roadbed materials and preparation thereof, in particular to an anti-crack and anti-seepage steel slag pavement base mixture and a preparation method thereof. The anti-crack and anti-seepage steel slag pavement base mixture is prepared from steel slag, common sand, bentonite, fly ash, fibers, cement and water according to the following steps of: fullystirring the steel slag, the common sand, the bentonite and the fibers to obtain a mixture; adding water into the mixture, fully mixing, sealing and standing to obtain a mixture; and adding cement, fly ash and the remaining water into the mixture to obtain the anti-crack and anti-seepage steel slag pavement base mixture. The raw materials are easy to obtain, the preparation method is simple and convenient, the obtained anti-crack and anti-seepage steel slag pavement base mixture meets the strength, rigidity and water stability of a pavement base structure, the crack resistance and seepage resistance can be improved, cracks caused by temperature stress and shrinkage can be reduced, and meanwhile, the erosion resistance, wear resistance and durability can be improved.

Description

technical field [0001] The invention relates to the technical field of roadbed materials and their preparation, and relates to an anti-crack and anti-seepage steel slag pavement base compound and a preparation method thereof. Background technique [0002] Steel slag is a by-product of the steelmaking process. According to statistics, the discharge of steel slag accounts for 10% to 15% of the total steel output. The rapid development of the steel industry has led to a rapid increase in the discharge of steel slag. On the one hand, the "slag mountain" occupies a large area of ​​land, and on the other hand, it has caused soil and environmental pollution. How to turn steel slag into a resource that can be used efficiently is the key point for my country's iron and steel industry to achieve energy conservation, emission reduction and sustainable development. urgent problems facing. [0003] The comprehensive utilization rate of steel slag in the United States has reached more than...

AI Technical Summary

Problems solved by technology

However, with the use of a large area, people have gradually found that the semi-rigid base is prone to dry shrinkage and temperature shrinkage cracks during the strength formation process and operation period, which will cause premature cracking of the asphalt surface and cause early failure.

Cracks are the main hazards of highway pavement. Cracks will cause rainwater to seep down along the cracks, soften the semi-rigid base, and cause its insufficient strength to form diseases such as pumping, sinking, and edge gnawing. The cracking of the base directly leads to the formation of reflective cracks; Cracks in the base layer will cause cracks, which will destroy the integrity of the structure, and will cause vehicle jumps in some sections of the road when passing, causing uncomfortable driving, affecting the speed of the vehicle, and at the same time causing psychological pressure on drivers and passengers, affecting the use of road sections; Bring other types of road surface damage, such as under the action of driving load, it will lead to peeling, loosening, mud pumping, new cracks and existing cracks will be more serious, and even cause frost heaving and muddying of the base or roadbed, which is serious Affect the service life of the pavement and the stability of the structure

[0007] Although the base layer is less affected by atmospheric environmental factors, it is difficult to prevent the intrusion of groundwater. In addition, when the pavement surface is permeable, it cannot prevent the infiltration of rainwater.

After the base layer is eroded by rainwater and groundwater, it will soften under the repeated action of the vehicle load. Once the base layer softens, the stress on the surface layer will increase rapidly, resulting in damage. Less than the design service life, resulting in an increase in later maintenance and repair costs