A construction method of slag-based cementitious material in highway high fill

Abstract

The invention discloses a construction method of a cementing material based on slag in highway high fill. The construction method comprises the following steps: 1) construction site preparation; 2) cement slurry preparation; 3) foam preparation; 4) foam concrete preparation; 5) foam concrete casting; 6) foam concrete curing. The invention provides a construction process of cast-in-place foam concrete utilizing a large amount of blast furnace slag, which is used in the construction of a highway high fill project and can perform very simple, convenient and efficient continuous casting, and the casting quality meets the requirements of site construction. As a large amount of solid waste blast furnace slag and fly ash are adopted in slurry for the construction of the highway high fill project,the consumption of the cement is greatly reduced, so that the construction process is more energy-saving and environmentally-friendly, and the sustainable development of society is facilitated.

Description

technical field [0001] The invention relates to a construction method of cementitious material based on slag in highway high fill. Background technique [0002] In the western region of my country, the landforms are dominated by mountainous areas. The construction of expressways in mountainous areas is limited by terrain, landform, and hydrogeological conditions. It is inevitable to carry out high fill expansion construction for the original roadbed; at the same time, in order to meet the overall planning requirements of the country , and make better use of the excavated earthwork resources, the form of high fill roadbed will be used more and more in the reconstruction and expansion of expressways. Among the high-grade highways in mountainous areas, filling and excavation subgrades account for 80%, among which there are not a few high-fill embankments exceeding 20m. With the promotion of national policies and the rapid development of transportation construction, the structur...

AI Technical Summary

Problems solved by technology

Due to the changes in the variety and composition of ironmaking raw materials and the influence of operating process factors, the composition and properties of slag are also different, making recycling relatively difficult. In recent years, with the rapid development of the metallurgical industry, the discharge of slag has continued to increase. At present, the annual discharge of slag from blast furnace ironmaking in my country is nearly 100 million tons, but the recycling rate is only about 38%, which leads to environmental problems caused by various slags.