Raw material ratio design method for semi-rigid base layer of cement stabilized steel slag

Abstract

The invention discloses a raw material ratio design method for a semi-rigid base of cement stabilized steel slag, and belongs to the field of road engineering materials. According to the design method, the steel slag aggregate is graded according to the particle size, the blending proportion of each grade of material is determined according to the principle of maximum density, then the maximum dry density and the optimal moisture content of the mixture with different cement mixing amounts are determined through design of the cement mixing amount and the water using amount and a compaction test, and finally the maximum dry density and the optimal moisture content of the mixture with different cement mixing amounts are determined through a 7d unconfined compressive strength test according to the test result. And obtaining the optimal raw material ratio of the cement-stabilized steel slag semi-rigid base by integrating the unconfined compressive strength requirement and the cement dosage ratio. According to the design method, the compressive strength of the road base can be met at the lowest cost, the problems of shortage of natural gravel road building materials and environmental pollution caused by the shortage of the natural gravel road building materials are solved, the utilization rate and applicability of steel slag waste are improved, and the ecological environment problem caused by accumulation of a large amount of steel slag is solved; and the pavement performance is unstable when the existing steel slag is directly used as a semi-rigid base material.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, in particular to a method for designing the ratio of raw materials for a semi-rigid base layer of cement-stabilized steel slag. Background technique [0002] With the vigorous development of infrastructure in my country, the rapid development of the road transportation industry has been driven, and the mileage of road construction has increased year by year, resulting in a shortage of natural stone aggregates. In addition, because the mining of natural stone aggregates will cause serious damage to the surrounding environment, it is subject to strict control, which makes the shortage of aggregates in road engineering more prominent, so the research on new aggregates has become a hot issue in the industry. [0003] Steel slag is a by-product produced in the process of iron and steel smelting, and its main chemical components are CaO, SiO 2 , Al 2 O 3 , Fe 2 O 3 , MgO, etc.; ...

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing research is to use the cementitious properties of steel slag, which is ground into powder and used as cementitious material directly. Due to the large differences in the composition of steel slag in different regions and different periods, the material properties are unstable, which limits the use of large-scale materials. Scale promotion and application

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