High-early-strength steel slag pervious concrete as well as preparation method and applications thereof

Abstract

The invention relates to the field of metallurgical slag processing, and particularly relates to a high-early-strength steel slag pervious concrete as well as a preparation method and applications thereof. The invention provides a high-early-strength steel slag pervious concrete which is prepared from the following raw materials in parts by weight: 10-17 parts of cement, 1-5 parts of steel slag micro-powder, 65-82 parts of steel slag aggregates, 0-10 parts of yellow sand or gravels, and 4-6 parts of water. Compared with steel slag pervious concretes in the prior art, the concrete provided by the invention has the advantages that the early strength properties are greatly improved, and the high-early-strength steel slag pervious concrete can be put into use in a short time. According to the invention, cement, water, steel slag micro-powder and steel slag aggregates are adopted for preparing the concrete, and a small amount of yellow sand and gravels also can be added as aggregates, so that extremely high compressive strength can be formed in 3 days, thereby facilitating the follow-up construction of pervious pavement system engineering.

Description

technical field [0001] The invention relates to the field of metallurgical slag treatment, in particular to a steel slag permeable concrete with high early strength and its preparation method and application. Background technique [0002] Permeable concrete, also known as porous concrete, sand-free concrete, and permeable floor, was originally developed and used by countries such as Europe, America, and Japan to address the defects of the original urban road surface. Permeable concrete can allow rainwater to flow into the ground, effectively replenish groundwater, alleviate the environmental problems of the city's sharp drop in groundwater levels, and effectively eliminate the hazards of environmental pollution such as oil compounds on the ground. Therefore, permeable concrete is an excellent pavement material for protecting groundwater, maintaining ecological balance, and alleviating the urban heat island effect. It is conducive to the healthy development of the human livin...

AI Technical Summary

Problems solved by technology

However, in practical engineering applications, there is a big problem: after the permeable concrete is paved, the surface layer of permeable bricks should be laid immediately. Since it takes more than 7 days for the permeable concrete to form a certain strength, in the short term it is If there is no strength, when laying the permeable bricks on the surface, it will definitely have impacts such as rolling and vibration on the permeable concrete below, which in turn will affect the strength, other properties and service life of the permeable concrete below.

Of course, you can also wait for the permeable concrete on the lower layer to develop strength (generally more than 7 days) before laying the permeable bricks on the upper layer, but this will affect the construction period, and impurities such as dust and leaves may enter the gaps in the permeable concrete during this period , generally do not use

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