Self-hydration activated pavement base layer

Abstract

The invention discloses a method which uses steel slag, mineral slag or electric power plant slag as the materials of a self-hydrating activation type pavement basic layer to activate the potential hydrating activation of the mineral slag or the pozzuolana activation of the electric power plant slag by the corresponding interlocking effect of each waste and the self-hydrating activation of the steel slag to form hydrated C-S-H, C-S-A-H, or C-S-A-F-H, ettringite, and calvital hydration product, form the initial strength of the pavement basic layer and ensure the continuous increasing of the later strength; counted by weight portions, the mixture ratio of each material is as follows: 40 to 65 portions of steel slag, as well as 35 to 60 portions of mineral slag and / or electric power plant slag. The pavement basic layer is a non-cement basic layer with excellent performance, and the preparation method thereof is as follows: the materials after being mixed are transported to a construction field, paved, rolled, and maintained by moisture retention to a regulated age. The invention uses industrial wastes, can save land and resources and reduce the cost, is beneficial to protecting environment, is simple to be constructed, and is suitable for building the basic layers and the foundation layers of common roads and advanced roads.

Description

technical field [0001] The invention relates to a self-hydration activated pavement base, in particular to a self-hydration activated pavement base of a cementless steel slag-power plant slag-slag system. The so-called self-hydration-activated pavement base refers to the fact that in the entire base system, the raw materials used are industrial solid waste, and no cement is added, and an alkaline environment is formed through the weak hydration of some components of the industrial solid waste itself. , to activate the activity of other industrial solid waste components with potential hydration activity or pozzolanic activity, that is, to activate the activity of the whole system through the hydration products of the system itself, and to form hydration C-S-H, C-S-A-H or C-S-A-F-H, ettringite and calcium hydroxide and other reaction products constitute the strength of the base layer and ensure the continuous growth of the strength in the later stage. Background technique [...

AI Technical Summary

Problems solved by technology

In addition, due to the high density of steel slag, it is not suitable for use in soft soil areas with insufficient foundation bearing capacity.

[0010] 3) Effective play of the weak hydration activity of steel slag: At present, the application research of steel slag in pavement base has not fully utilized the activity of steel slag, and most of them simply use steel slag as a kind of aggregate for pavement base

[0015] It can be seen that although steel slag and power plant slag are used in road engineering, they are generally used in combination with cement or lime fly ash, and there is no relevant patent report on the self-hydration-activated pavement base made of industrial waste.

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