In China, class II and below highways account for the majority. According to the constraints of traffic axle load composition and construction funds, inorganic binders such as lime, lime fly ash and so on are generally used to strengthen the soil as the pavement bottom layer and bottom layer. However, in practice, the problems of low early strength, poor water stability, lack of durability and complex construction technology of lime stabilized soil and lime fly ash stabilized soil have seriously affected the highway construction quality and service life. There are many methods of soil reinforcement, generally including physical, chemical and comprehensive reinforcement methods. Although there are many methods, in many methods and processes, the selection of reinforcement data is the key, which is the basis of whether to reach the intention of soil reinforcement, save investment and shorten construction period.
Soil solidifying agent is a new comprehensive reinforcement skill. It adds additives to the soil to make it have a series of physical and chemical changes with the soil, so as to change the physical and mechanical properties of the soil and meet the requirements of engineering construction. Due to the wide application range, good reinforcement effect and simple and convenient construction of soil solidification skills, it is very suitable for the needs of practical projects such as highway subgrade and foundation reinforcement. Based on the analysis of the research status of soil curing agent at home and abroad, this paper selects indoor and outdoor tests to study the curing mechanism and road function of soil curing agent; According to the optimal planning of cooperation ratio, a cooperation ratio scheme is proposed.
Under the condition of cooperative ratio, the road functions of the mixture such as unconfined saturated compressive strength, water stability coefficient, freeze-thaw stability coefficient, anti shortening function and anti fatigue function are tested; And lime stability data are compared and analyzed; The application of soil solidifying agent in the project is verified through the solid project, and the key problems of construction key and quality control are put forward together. The results show that the data of soil stabilizer can greatly improve the early strength of stable soil, effectively shorten the construction period and save investment; Soil curing agent has good water stability, anti shortening function and other mechanical functions, which can improve highway application quality and prolong service life. Soil solidifying agent has a broad application prospect in cold regeneration construction.
After the site is leveled, the cement shall be evenly distributed by water spreader according to the planning requirements. The water truck is equipped with curing agent dissolved according to a certain share. The cold regenerator pushes the water truck forward. A water pipe is connected with the water tank of the water truck and the cold regeneration water pump. The cold regenerator moves forward evenly. The flow of the water pump is controlled by the flowmeter of the cold regenerator, so that the soil, cement, curing agent and water in the mixing room of the cold regenerator will be mixed evenly.
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